Global Warming Causes

D D He hv RenewableEnergy

Fri, 24 May 2013 09:42:53 GMT

For each reaction, calculate the energy released and, assuming equipar-tition of momenta of the reaction products, the energy of each product. What is the energy of the photon released in Reaction 3 1.12 Random access memories RAMs using the Zing Effect were first introduced in 1988 but only became popular in 1990 when they accounted for 6.3 of total RAM sales. In 1994 they represented 712 million of a total of 4.75 billion. Sales of all types of RAMs reached 6 billion in 1997. A company...

Apply Your Skill Geology

Thu, 23 May 2013 12:52:03 GMT

Design Using what you have learned in this lab and in the chapter, develop a plan for stopping the pollution plume. Make a map showing where your plan will be implemented. Indicate the sites where water quality will be monitored regularly. y , i -. - -Uffefi l - . X A i 11 i L - f. SEM I VOLE CO _ ---------EflDTtp CO ,L -f' gm- r . n 1 . 1 J i - . ar-t . t TTJ- _ - rr .- r' .nr 1. , .,. . rjji H ' . , -------i IV . .' ' ' - _ I 1 , HiiurRH--.J j -T _ _ . ' U Download quizzes, key terms, and...

DISCUSSION TOPICS Jfn WeatherClimate

Sun, 19 May 2013 10:59:40 GMT

Explain the respective roles of the earth's orbit about the sun and the tilt of the axis of rotation for global climate. Explain the differences between the transmission of solar and terrestrial radiation by the atmosphere. What is the relative importance of incoming solar radiation, turbulent energy exchanges and other factors in determining local daytime temperatures Consider the role of clouds in global climate from a radiative perspective. What effects do ocean currents have on regional...

Solar Collector Costs Efficiencies and Suppliers EnergyTechnology

Tue, 30 Apr 2013 18:51:58 GMT

Swimming pool and rooftop water heaters can convert solar energy into heat with an efficiency of 50-70 . The efficiencies of electricity-generating solar collector systems are much lower. They operate at efficiencies from 5 to about 30 . Thin-film solar shingles used on residential roofs today are only about 5 to 8 efficient. The efficiency of solar towers is also about 5 . Photovoltaic PV cell efficiencies range from about 5 for amorphous silicon A-Si designs, 9 to 10 for CdTe modules, and 13...

The Grid FossilFuels

Mon, 22 Apr 2013 20:40:56 GMT

The final element in the electricity supply 'jig-saw' is transmission and distribution. In the electricity supply industry transmission and distribution are viewed as quite separate activities. In the industry, when they talk of transmission, the bulk transfer of electrical power from several power stations to towns and cities is being considered. Typically, power transmission is between one or more power plants and several substations near populated areas. The transmission system allows...

Insurance Financial Impacts and Assistance ExtremeWeather

Tue, 16 Apr 2013 10:01:54 GMT

Our homes are generally one of the most expensive investments we will ever make. Extreme weather conditions as a result of climate change are increasing the risks of our investments being destroyed. Most of this book has been about preventing or limiting damage to our homes by understanding the potential effects of climate change and the extra stresses that are developing as a result. Unfortunately some conditions will always exceed our ability to prepare our buildings to survive them. For...

Projects Uhg Climate Forecast System

Wed, 03 Apr 2013 00:22:11 GMT

Answer these questions using an online geologic carbon cycle model located at The model predicts the influence of geologic processes on the CO2 concentration of the atmosphere. To begin with, the atmosphere and the ocean exchange CO2. It takes about 300 years for CO2 to find equilibrium between the ocean and the atmosphere, if the chemistry of the ocean was held constant. Chemical reactions with rocks on land and on the sea floor further alter the carbon chemistry of the atmosphere and ocean on...

Run of river systems Climate Change 2

Wed, 13 Mar 2013 18:06:59 GMT

Many rivers have a flow rate in excess of 0.75 m per second which makes them eligible to power so-called run of river generators. The conventional method is to create a dedicated channel which WPI turbine courtesy of CADDET, issue 1 04 accommodates a cross-flow generator which is a modern version of a water wheel or a 'Kaplan' turbine which has variable blades. A Norwegian company, Water Power Industries WPI , has developed a water turbine on floats that has a vertical axis rotor fitted with...

Visualizing Springs Geology

Mon, 04 Mar 2013 17:20:31 GMT

Perched water table Layer of impermeable clay A spring forms where a permeable layer and impermeable layer come together. A layer of impermeable rock or clay can create a perched water table. Springs can result where groundwater emerges from a perched water table. Some springs form where a fault has brought together two different types of bedrock, such as a porous rock and a non-porous rock. Karst springs form where groundwater weathers through limestone bedrock, and water in the underground...

by Sam Hitz and Joel Smith Stratus Consulting Inc United States Climate Change Policies

Wed, 16 Jan 2013 18:00:38 GMT

We surveyed the literature to assess the state of knowledge with regard to the presumed benefits or avoided damages of reducing atmospheric concentrations of greenhouse gases to progressively lower levels. The survey included only published studies addressing global impacts of climate change studies that only addressed regional impacts were not included. The metric we used for change in climate is increase in global mean temperature GMT . The focus of the analysis centred on determining the...

CAREERS IN EARTH SCIENCE Yft Geology

Wed, 16 Jan 2013 06:41:10 GMT

Hydrogeologist Earth scientists who map groundwater are called hydrogeologists. They use field methods, maps, and aerial photographs to determine where ground-water is located. To learn more about Earth science careers, visit glencoe.com. Overuse Groundwater supplies can be depleted. If groundwater is pumped out at a rate greater than the recharge rate, the groundwater supply will decrease and the water table will drop. This is happening to the Ogallala Aquifer. Its water, used mostly for...

Proxy Methods The Carbon Cycle

Thu, 10 Jan 2013 14:49:53 GMT

A variety of independent tests of the modeling predictions as to levels of Phanerozoic atmospheric CO2 are available. Methods include determining 1 the S13C of carbonates in paleosols 2 the stomatal density Figure 5.14. Input function for volcanic degassing of CO2 and for CO2 formed by the oxidation of CH4 from methane hydrate decomposition at the Permian-Triassic boundary. After Berner, 2002. Figure 5.14. Input function for volcanic degassing of CO2 and for CO2 formed by the oxidation of CH4...

Heat islands and urban domes Change in the Weather

Wed, 12 Dec 2012 11:30:14 GMT

Air escaping from heated buildings, atmospheric particles absorbing infrared radiation at night, the reduction in wind speed, and the heat from thousands of engines combine to make the city into an island of warmth surrounded by a cool, rural sea. It is a heat island. During the day the temperature rises rapidly. On a sunny day in summer it may rise by as much as 31 F 17 C between dawn and the middle of the afternoon. It falls again at night, but in the early part of the night the city center...

differential temperature controller SolarEnergy

Tue, 04 Dec 2012 20:59:23 GMT

One of the most important components of an active solar energy system is the temperature controller because a faulty control is usually the cause of poor system performance. In general, control systems should be as simple as possible and should use reliable controllers, which are available nowadays. One of the critical parameters that need to be decided by the designer of the solar system is where to locate the collector, storage, over-temperature, and freezing-temperature sensors. The use of...

Info Mvo AtmosphericChemistry

Thu, 04 Oct 2012 04:53:11 GMT

FIGURE 4.17 Primary quantum yield for O formation from N02 photolysis, as correlated by Demerjian et al. 1980 . about 420 nm dissociation does not occur. As noted earlier, the bond energy between O and NO, about 300 kJ mol-1, corresponds to the energy contained in wavelengths near 400 nm. At longer wavelengths, there is insufficient energy to promote bond cleavage. The point at which dissociation fails to occur is not sharp because the individual molecules of N02 do not possess a precise amount...

Info 1 EnvironmentalEthics

Fri, 21 Sep 2012 17:23:00 GMT

George Perkins Marsh, diplomat, public servant, polymath scholar, and pioneer conservationist, was born in Woodstock, Vermont, on March 15, 1801, and died in Vallom-brosa, Italy. Lawyer, congressman 1843-1849 , U.S. envoy to the Ottoman Empire 1850-1854 and to Italy for an unparalleled twenty-one years 1861-1882 , he was an intimate of the best-known scholars of his age on both sides of the Atlantic. A Dartmouth College graduate, Marsh was largely self-taught, notably in mastering twenty...

Limitations Of Expert Opinion EnvironmentalChange

Thu, 20 Sep 2012 10:52:23 GMT

That experts can and often do disagree on matters pertaining to their areas of expertise is obvious. Among the topics that relate to environmental change, none has evoked more debate among experts than that of greenhouse wanning. Although many perhaps most Earth and atmospheric scientists consider the possibility of gradually increasing temperature to be a real and serious threat, the opposite opinion has been strongly expressed and a spirited debate has occurred Ellsaesser, 1991 Kerr, 1989...

In search of plural visions EnvironmentalResponsibility

Fri, 07 Sep 2012 20:33:56 GMT

What the movements and their critique of science sought was not antiscience but a plural vision that allowed for both the wisdom of normal science and the vision of the eccentric, the dissenter, the marginal, the vulnerable and alternative world-views. The playfulness, the new concepts and new reciprocity between science and social worlds created through novelty by combination, was extended by grass-roots politics and philosophers to a wider domain. They forced the democratic imagination to...

Australias Coral Crisis ClimateChange

Wed, 05 Sep 2012 01:22:36 GMT

I did not see some of the worst bleaching effects in the Keys, but 8 months later I get an opportunity to investigate coral bleaching and its links to climate change as part of a magazine assignment in Australia and Fiji. It will turn out to be a challenging job full of too much travel, miscommunications, political conflict, a dive in which my air cuts off, and another in which I cut my hand on coral, resulting in the need for hand surgery. Still, given my paradise-rich itinerary, I receive...

Dig for Dinosaurs Geology

Mon, 03 Sep 2012 22:48:34 GMT

What is it like to scuba dive with H crocodiles in the Okavango delta Or fly in a bush plane L over the African continent Or dig for dinosaurs in China The National Geographic Expeditions allow you to share in the excitement and adventures of explorers, scientists, and environmentalists as they venture into the unknown. Each Expedition takes you on a journey that enriches your learning about our dynamic planet. 892 Tracing the Human footprint Use with Chapter 2 898 Stoic of Rock Use with...

Social movements and the making of technoscience EnvironmentalPolitics

Mon, 03 Sep 2012 14:15:32 GMT

In recent decades social movements have also served to reorient science and technology, as well as politics and business, into alternative directions. Out of the anti-imperialist and student movements of the 1960s and the feminist and environmentalist movements of the 1970s and 1980s have emerged a range of alternative ideas about knowledge, in form, content, and meaning, that has given rise to new sciences and technological programs Eyerman and Jamison 1991 Rose 1994 . Out of critique have...

Snow remote sensing HydroclimateProjects

Tue, 28 Aug 2012 15:06:05 GMT

Remote sensing of snow involves detection and quantification of falling snow, assessment of snowcover on the land, and the snow water equivalent SWE of the snowpack. Detection of falling snow and assessment of the snow-pack require different approaches and remote sensing strategies. Quantification of falling snow has real-time applications for transportation, construction, agriculture, and commerce, and snowcover data are used for flood forecasting, water resources management and planning, and...

The Path to Suicide RenewableEnergy

Sun, 26 Aug 2012 11:46:10 GMT

Of all forms of energy in use today, oil has the lion's share. It accounts for 40 percent of our overall energy consumption, and over 90 percent of the energy we use for transportation. Essentially everything in our modern lives is made with some contribution from oil. For example, oil and gas are embedded into every aspect of making a common shirt from the feedstock to making nylon or rayon, to running the looms, to transporting the shirt to a store, to the transportation used to take the...

United States of America A Snapshot of US Practices SocialResponsibility

Sat, 25 Aug 2012 12:19:40 GMT

Adam Lindgreen, Valerie Swaen, and Wesley J. Johnston Abstract Organizations increasingly are embracing the concept of corporate social responsibility CSR . In this study CSR refers to actions that further some social good, beyond the interests of the firm and that which is required by law McWilliams et al., 2006 . Specifically, CSR consists of economic citizenship, legal citizenship, ethical citizenship, and discretionary citizenship Maignan, 1997 Maignan and Fer-rell, 2001 Maignan et al.,...

References Tmw WaterLoss

Thu, 23 Aug 2012 18:07:03 GMT

1. International Water Association. Performance Indicators for Water Supply Services. Manual of Best Practice. London IWA, 2000. 2. Tardelli, J. Chapter 10. In Abastecimento de Agua. Sao Paulo, Brazil. Tsutiya M Escola Politecnica, Universidade de Sao Paulo 2005. 3. Grigg, S. N. Main Break Prediction, Prevention, and Control. Denver, Colo. AWWARF, AWWA, and IWA, 2005. 4. American Water Works Association. Water Audits and Leak Detection, 3rd ed. Manual M36. Denver, colo AWWA, in press. 5....

Temporal and spatial variation characteristics of soil moisture ClimateStudies

Wed, 22 Aug 2012 14:51:16 GMT

The temporal and spatial variations of soil moisture are analyzed using in-situ soil moisture data from 98 agricultural meteorological gauge stations in Eastern China for the years 1981 - 1991. The data includes gravimetric soil moisture, field capacity, bulk density of soil and wilting level. Distributions of gauge stations for soil moisture measurement are shown by Fig. 7.3, in which F represents non irrigation and T for irrigation. Irrigation stations will not be used in analysis in order to...

Other Economic Variables Global Warming Policies

Wed, 22 Aug 2012 12:50:01 GMT

The model includes many other economic and environmental variables that are part of the integrated assessment analysis. Figure 5-9 shows per capita consumption for a representative set of scenarios, while Figure 5-10 shows the historical and projected carbon-output ratio. Two points about the trends should be noted. First, the model assumes continued rapid economic growth in the years ahead, although with slightly slower growth than over the past four decades. The average growth in global per...

Chinas position on climate change ClimateChange

Wed, 22 Aug 2012 10:22:43 GMT

On May 13, 1998, at a hearing before the US House of Representatives' Committee on International Relations entitled The Kyoto Protocol Problems with US Sovereignty and the Lack of Developing Country Participation, Benjamin Gilman, chairman of the committee, characterized China's position on climate change at the Kyoto Conference as a policy of 'Three Nos' no obligations on China, no voluntary commitments by China, and no future negotiations to bind China US House 1998 . Despite its political...

State Sovereignty SustainableDevelopment

Mon, 20 Aug 2012 22:46:42 GMT

State sovereignty is one of the oldest principles of general international law. Its meaning is that a state has exclusive jurisdiction on its territory. In other words, the state is the only authority that can adopt legal rules for its territory, has executive power, and competence to judge litigation. This principle is applicable in environmental matters, but with certain restrictions concerning the preservation of the environment. Principle 21 of the Stockholm Declaration makes it explicit...

The Motorisation Of America EnergySecurity

Mon, 20 Aug 2012 09:24:02 GMT

The motorisation of American cities, which was carried out in a number of discrete stages between 1925 and 1960, is conventionally explained by US economists and historians as the consequence of sovereign consumers exercising their freedom of choice. As one former presidential science adviser put it, 'Society decided it wanted the automobile, and it bought the automobile.'8 As Americans got richer, so the argument goes, their personal preference for the private motor car over the public...

The Case Of China SustainableDevelopment

Fri, 17 Aug 2012 02:29:14 GMT

Over the last two decades, China has demonstrated a development strategy that has allowed for a significant decoupling of economic growth from energy use. The energy intensity of the Chinese economy hasbeen reduced by approximately fifty percent during the last twenty years, thereby significantly reducing costs, imports, and environmental degradation. Large opportunities to continue to improve energy intensity exist. The current development strategy of China is known as the 3E strategy and...

The Nature of Common Resources Climate Change Policy

Wed, 15 Aug 2012 07:42:03 GMT

From one perspective, any system in which the use of a resource by one party causes harm to another can be viewed as a commons. Those harmed necessarily have a moral stake in the use or conservation of the resource, even if they don't have the ability to exploit it in kind and thus to cause a symmetric harm. However, it is when each party can cause harm to the others that we have a classic commons problem. In a commons, individuals typically gain much more from their use of the resource than...

Phase III the EU establishes legal competence EnvironmentalPolicy

Sun, 12 Aug 2012 12:45:12 GMT

Lacking either a legal basis or any truly structured sense of direction, the Commission approach to environmental issues until the mid-1980s was piecemeal and reactive, with a tendency to address problems on an ad hoc basis that depended largely on a combination of opportunism and the personal preferences of DGXI officials or incumbent environment Commissioners. The turning point came in 1987 when environmental protection was finally recognized as part of the legal competence of the Community...

Global Environmental Threats Sustainability

Sun, 12 Aug 2012 05:59:56 GMT

Biotic impoverishment and resource scarcity Toxification and threats to public health Source From James Gustave Speth and Peter M. Haas, Global Environmental Governance 2006 , 19 Source From James Gustave Speth and Peter M. Haas, Global Environmental Governance 2006 , 19 scientist in the British government believe that climate change is the most severe problem the world faces, bar none.5 Scientists know that the greenhouse effect is a reality without the naturally occurring heat-trapping gases...

Influences on River Responses TropicalCyclones

Sun, 12 Aug 2012 03:25:06 GMT

High-magnitude rainfalls delivered by tropical cyclones normally produce extraordinarily big discharges in Pacific island rivers Figs. 9.4 and 9.5 . The nature of a river's response depends primarily on three groups of influences, which are discussed below. The first group are the meteorological characteristics of an individual tropical cyclone, such as the organisation of its cloud bands, speed of movement and the corresponding patterns in precipitation. The second set of factors are those...

Thermaldynamical Effects Of The Tibetan Plateau On The East Asian Monsoon Monsoon

Tue, 07 Aug 2012 10:21:29 GMT

GUOXIONG WU, QIONG ZHANG, ANMIN DUAN and JIANGYU MAO 1. Introduction The Tibetan Plateau Qinghai-Xizang Plateau extends over the latitude-longitude domain of 25-45 N, 70-105 E, with a size of about one quarter of the Chinese territory and a mean elevation of more than 4,000 m above sea level. Surface elevation changes rapidly across the boundaries of the Plateau, especially the southern boundary. Strong contrasts exist between the western and eastern parts of the Plateau in land surface...

Colin Woodard ClimateChange

Sat, 04 Aug 2012 21:26:47 GMT

When the Dutch want to spend a summer's day by the sea, not a few drive up to the quiet village of Petten, perched on Holland's North Sea coast. Some stay in tidy cottages huddled within earshot of the roaring surf others smell the sea air or watch seabirds from their hotel balconies or the windows of the handful of shops and restaurants near the hamlet's main intersection. But from town, nobody can get so much as a glimpse of the nearby sea. As far as the eye can see, Petten's ocean view is...

Government By the Industry For the Industry Genetically Engineered Foods

Sat, 04 Aug 2012 02:24:50 GMT

Vice President George Bush sat in his chair across from four Monsanto executives. They had come to the White House with an unusual request. They wanted more regulation. They were venturing into a new technology, the genetic modification of food, and they were actually asking the government to oversee their emerging industry. But this was late 1986. Ronald Reagan was president and the administration was busily deregulating business. Bush needed convincing. We bugged him for regulation, said...

The American Century Three Phases Petrodollar

Fri, 03 Aug 2012 21:14:06 GMT

A historical review of the American Century can be traced back through distinct economic periods in the post-World War II period. F. William Engdahl offered an exemplary model in which he divides this postwar period of US supremacy into three separate phases. The following constructs including the three phases of US dominance is liberally borrowed from Engdahl's online essay, The American Century Iraq and the Hidden Euro-dollar Wars,31 also chronicled in his updated book, The Century of War...

An Automatic Correction Sustainability

Wed, 01 Aug 2012 12:08:11 GMT

Another reason for concern about the growth coming our way is the absence of adequate natural self-correcting forces within the economy. One area of hope in this regard has been the natural evolution of technology. The economy of the future will not be identical to that of the past because technology is changing. It is creating opportunities to reduce materials consumed and wastes produced per unit of output it is opening up new areas and new products that are lighter, smaller, more efficient....

To Grow or Not To Grow Sustainability

Wed, 01 Aug 2012 12:01:03 GMT

Does it make sense to challenge economic growth directly Most people would say no, and they fall generally into two camps. First, there are those who see economic growth as an unalloyed good. Recall from Chapter 1 the worldview of Market World. Those with this Promethean and cornucopian perspective have faith in free markets and competition to resolve problems. They tend to see nature as boundless and thus unlikely to exercise significant constraints over human action. Economic growth, in their...

Global warming potential The Science of Climate Change

Fri, 27 Jul 2012 14:24:07 GMT

The concept of a radiative forcing was introduced in Chapter 2. This is much easier to assess than the climatic response because of the feedbacks within the climate system. Radiative forcing can provide a simple measure of how important each greenhouse gas is relative to the others although the concept of radiative forcing has limitations when considering the full implications of climate change. Therefore there has been great emphasis in the various IPCC reports on determining the radiative...

Experiments Global Water Security

Fri, 27 Jul 2012 07:07:52 GMT

Sedimentary deposits of zeolite are widespread in the Idjevan clinopilolite and Shirak mordenite regions of Armenia. The natural zeolites clinop-tilolite and mordenite were dehydrated at 110oC, and prepared by the heated pile method, using 0.5 and 1 N solutions of CaCl2. Clinoptilolite modified by catamine-AB was prepared according to Torosyan et al. 2000 . Adsorptive isotherms were determined for the equilibrium status of water containing chlorine compounds or pesticides in concentrations of...

Radon TheEnvironment

Sun, 22 Jul 2012 15:40:46 GMT

In 1984 a worker in a nuclear plant triggered a radiation contamination alarm as he entered the plant to work. Since the alarms were intended to check for contamination as workers left the plant, plant officials were amazed. Investigations discovered the source of the worker's contamination was radon present in extraordinarily high amounts in his home. Radon is an invisible, odorless radioactive gas formed by the decay of uranium in rocks and soil. This gas seeps from underground rock into the...

Contents CarbonDioxide

Sat, 21 Jul 2012 04:18:22 GMT

Chairman's Remark Organizing committee International advisory board International scientific committee Local advisory board Local organizing committee Supporting organizations Supporting organizations for technical excursion I. Heterogeneous catalysis of C02 Heterogeneous catalytic reactions with C02 Status and perspectives G. Centi and S. Perathoner Chemicals from C02 via heterogeneous catalysis at moderate conditions Y. Sun Synthetic hydrocarbon fuels and C02 utilization G. Schaub, D. Unruh...

X X 1 SolarEnergy

Tue, 17 Jul 2012 12:10:01 GMT

A list of definitions that includes those related to solar radiation is found in Appendix 2. The reader should familiarize himself or herself with the various terms and specifically with irradiance, which is the rate of radiant energy falling on a surface per unit area of the surface units, watts per square meter W m2 symbol, G , whereas irradiation is incident energy per unit area on a surface units, joules per square meter J m2 , obtained by integrating irradiance over a specified time...

INTRODUCTION Hci RenewableResources

Mon, 16 Jul 2012 11:07:31 GMT

A large amount of primary energy stored in hydrocarbon-based solid, liquid, and gaseous fuels is consumed for electricity and heat generation in residential and industrial sectors and for internal-combustion-engine-based transportation. Worldwide, 7235 million t of oil equivalent MTOE , or 75 of energy use, in 1997 was based on fossil fuels. Per capita CO2 emissions in that year amounted to 1.13 t of carbon 1 . In the 20 th century, the human population has quadrupled, while the FIGURE 8.1...

Trade winds and Hadley cells Change in the Weather

Sat, 14 Jul 2012 05:45:21 GMT

Air over the equator is heated strongly by contact with the warm surface. The warm air rises all the way to the tropopause. There, trapped beneath the tropopause, it moves away from the equator. Cooler air flows toward the equator at low level, to take its place. Moving air tends to turn in a circle. This is called vorticity and it is why the water usually forms a spiral, or vortex, when it flows out of a bathtub. As the cool air moves toward the equator its vorticity swings it to the right in...

Climate change Ethics in Economics

Fri, 13 Jul 2012 20:48:37 GMT

The central concern in this chapter is to provide a broad background picture of the scientific, political and economic issues relating to the enhanced Greenhouse Effect. This initiates the exploration of links between different disciplinary perspectives and some common problems they share. As the structure of the book shows, understanding complex environmental problems requires moving from scientific knowledge of physical relationships and impacts to socio-economic variables in order to...

Building to Last ExtremeWeather

Fri, 13 Jul 2012 18:46:25 GMT

In order for buildings to withstand problems associated with climate change, they must first be mechanically fit. By that I mean they need to be structurally sound and able to provide for our shelter and protection without being harmed by the elements. Using a body analogy, by German building biology practitioner Dr. Anton Schneider, our homes need strong bones and joints framing and fasteners . The building's skin exterior surfaces needs to be able to keep out the rain snow and wind, while...

Scientist of the Decade CarlGustav Rossby WeatherClimate

Thu, 12 Jul 2012 14:57:33 GMT

Born on December 28, 1898, in Stockholm, Sweden, the meteorologist Carl-Gustav Rossby was one of the most influential atmospheric scientists in the 20th century. After earning his filosofie kandidat that is, bachelor's degree at the University of Stockholm in 1918 with specializations in mathematics, mechanics, and astronomy, Rossby left Stockholm and moved to Norway to join the Bergen School. He worked with the Bjerkneses on the development of the polar front and air mass theories until 1921....

Suns Radiation ClimatesWeather

Tue, 10 Jul 2012 04:27:45 GMT

The amount of radiant energy received or emitted every second at a surface of one square metre is properly known as the radiance, though we lazily refer to it simply as the 'radiation'. The radiance on a surface facing the Sun, just outside the Earth's atmosphere, is called the solar constant, equal to 1,367 W m2. This is more than the output of a kilowatt electric heater on Figure 2.4 The solar elevation at various times of day and in various months, at Sydney 34 S . For instance, the Sun is...

Floating Solar Islands EnergyTechnology

Mon, 09 Jul 2012 11:30:14 GMT

A Swiss-designed artificial island is planned near the equator Figure 1.41 in the Gulf state of Ras Al-Khaimah. A 100-m diameter prototype is under construction. It is one tenth of the size of the planned solar island. The solar concentrators will convert circulating water into steam, which will produce both electricity and H2. The electricity will be used for plant operation, and the H2 will be sold as fuel. The designers feel that the plant will be cost competitive Solar island floating on an...

Overcoming Barriers To Green Buildings GreenBuilding

Mon, 09 Jul 2012 03:13:06 GMT

Some of the barriers to green building performance have little to do with cost and a lot to do with how engineers and architects have become accustomed to working with each other, much like brothers and sisters in the same family who want nothing to do with each other during adolescence, but who become good friends later in life. Dan Nall is senior vice president of Flack Kurtz, one of the leading building engineering firms in the United States. Here's his take on the situation. Engineers don't...

Genetically Modified FoodGenetically Modified Organisms ClimateChange

Mon, 09 Jul 2012 01:30:16 GMT

As for the future, your task is not to foresee it, but to enable it. Antonie de Saint-Exupery, 1948, The Wisdom ofthe Sands In his chapter on orthobiosis, Metchnikoff Ref. 42 in Chapter 2 lauds Luther Burbank, an outstanding American botanist, for his improvement of useful plants. Burbank, he tells us, cultivated great numbers of fruit trees, flowers, and all kinds of plants, with the object of increasing their utility. He goes on to say that He has modified the nature of plants to such an...

Demand for Export Function Globalization and the Environment

Fri, 06 Jul 2012 09:48:04 GMT

where X quantity of export hx price elasticity of demand for export with hx lt 0 P home price of tradable goods exports or imports P foreign price of tradable goods x income elasticity of demand for exports E exchange rate H F H home country's currency F foreign country's currency Y income of foreign country A a constant. Taking natural the log of 23.1 and total differential of both sides, we have dln X hx dln P - dln P - dln E xdln Y 23-2 where x percent change in export quantity p percent...

Problems In Quantifying Risk EnvironmentalChange

Thu, 05 Jul 2012 19:00:35 GMT

Quantitative risk assessment is an imprecise and controversial activity Cohrssen amp Covello, 1989 Fischhoff, 1977 Krimsky amp Golding, 1991 Primack, 1975 Sjoberg, 1980 . It is an example of the problem of estimation of probabilistic variables more generally. When frequency-of-incidence data exist in sufficient quantity, they may be used as the basis for risk estimates. This approach is effective for certain purposes, such as the setting of premiums for insurance against specific eventualities....

HighTemperature IndirectSolar Thermal Hydrogen Processes Solar Hydrogen Generation

Tue, 03 Jul 2012 16:56:45 GMT

More recently, higher temperature processes have been considered at T gt 2000 K , such as two-step thermal chemical cycles using metal oxide reactions.2 The first step is solar the endothermic dissociation of the metal oxide to the metal or the lower-valence metal oxide. The second step is non-solar, and is the exothermic hydrolysis of the metal to form H2 and the corresponding metal oxide. The net reaction is H2O H2 0.5 O2, but since H2 and O2 are formed in different steps, the need for...

Drought famine and desertification EnvironmentalIssues

Tue, 03 Jul 2012 00:16:30 GMT

In recent years, the world's attention has been drawn time and again to the Third World nations of Africa, by the plight of millions of people who are unable to provide themselves with food, water and the other necessities of life. The immediacy of television, with its disturbing images of dull-eyed, pot-bellied, malnourished children, skeletons of cattle in dried-up water courses, and desert sands relentlessly encroaching upon once productive land, raised public awareness to unexpected...

Introduction 1 Monsoon

Sun, 01 Jul 2012 05:29:23 GMT

The East Asian monsoon is an integral part of the global circulation system. During the winter season of the Northern Hemisphere, a persistent high pressure system develops as a result of the cold air mass in the high latitudes of Eurasia. This generates southward surface flow along the east of the Tibetan Plateau forming the strongest winter monsoon in the world. This monsoonal flow commonly penetrates as far south as the South China Sea and can even generate cross-equatorial flow. In summer,...

Hepatitis Delta HDV Epidemiology

Sat, 30 Jun 2012 11:39:11 GMT

Organism Hepatitis delta virus HDV is dependent on HBV infection of the person. Either both viruses can infect at the same time or HDV infects an already infected HBV carrier. Clinical features With coinfection both viruses infecting at the same time , there is normally a self-limiting infection with only about 5 continuing into the chronic form of HDV. However, with superinfection HDV infection of an already HBV-infected person , there is a severe acute hepatitis with 80 continuing to chronic...

Alternative Architectures Slow Global Warming

Thu, 28 Jun 2012 05:09:57 GMT

When controlling emissions, policy makers must select from a menu of three options. First, they can set targets for the quantity of emissions and leave the market to determine the cost of achieving those targets. That approach leads to the cap and trade architecture embodied in the Kyoto Protocol, which I have reviewed already. Second, they can agree on the cost of the effort that each country will make and leave the market to determine what level of emissions results from that effort. That...

The role of language in learning and the value of finding the roots of meaning WindEnergy

Tue, 26 Jun 2012 12:29:02 GMT

Words and ideas are useful but there can never be one correct meaning or definition of each one. Despite the best efforts of scientists to keep meanings fixed and precise, the meaning of what is written and said in science as in any aspect of human life changes over time - public meanings change over historical time, and private understandings change over the lifetime of an individual. It is therefore important to uncover how children use words. We may accuse them of muddled thinking, when it...

TimeDependent Production Thermoeconomics

Tue, 26 Jun 2012 09:56:55 GMT

Three different application examples involving time dependence in different ways are analyzed using the executable tool VarloadTL.exe. They all start from a known design point in the steady state. The first predicts the detailed performance of a power system at a sought load ratio load design load . The second estimates the penalty of off-design performance of a cogeneration system given demand profiles. The third computes the optimal operation of a facility of a number of single-product...

The Problem EnvironmentalChange

Sun, 24 Jun 2012 19:56:46 GMT

Is there a problem Is the prospect of environmental change and in particular change resulting from human activities that would make the planet significantly less hospitable to human or other life as we know it a genuine threat Is there a real basis for concern There are many who would answer no to these questions. Ray and Guzzo 1994 provided an extensive list of pointers to writers who take this position, either with respect to environmental change in general or to specific alleged...

References Pmm The Lifespan Of Earth

Sun, 24 Jun 2012 12:15:29 GMT

1. Mitra B, Cameron P, Butt W. Population based study of pediatric head injury. J Ped Child Health 2007 43 3 154 9. 2. Goldstein, FC, Levin, HS. Epidemiology of pediatric closed head injury incidence, clinical characteristics and risk factors. J Learn Disabil 1987 20 9 518 25. 3. Michaud LJ, Rivara FP, Grady MS, Reay DT. Predictors of survival and severe disability after severe brain injury in children. Neurosurgery 1992 31 2 254 64. 4. Anderson V, Catroppa C, Morse S, Haritou F, Rosenfeld J....

Overshoot The Human Future

Mon, 18 Jun 2012 20:08:54 GMT

While gaining its position of dominance over the natural world, Homo sapiens, especially in the past several decades, has achieved and exercised so much power over the planet's resources and rich panoply of life as to compromise the capacity of Earth to sustain the human enterprise, thus putting us on that collision course with nature that the world's scientists warned us about. Indeed, there is considerable evidence that the enormous expansion of the human enterprise has already caused Homo...

Markobine Gando WindEnergy

Fri, 15 Jun 2012 20:54:26 GMT

This chapter began by showing that naive observation is not possible. There are no such people as objective scientists, able to collect data without using any of their own ideas. The scientific method may start when we notice something, but even this process depends unconsciously on the ideas that are already in our minds. These ideas or concepts are often labelled by single words, so it is important to find out what each person, whether learner or learned, understands by these words. Figure...

Failure To Recycle EnvironmentalChange

Fri, 15 Jun 2012 20:25:04 GMT

Many communities have established recycling facilities and programs. Provisions vary from recycling centers, to which people can bring specified materials for disposal, to curbside pickup of recyclable trash on a regularly scheduled basis Milner, 1989 . Some curbside pickup programs require the recyclable trash to be separated before pickup into several categories e.g., paper, glass, metals, plastics , others permit all types to be commingled, and some require intermediate degrees of...

dM kaAB AtmosphericChemistry

Fri, 15 Jun 2012 15:10:02 GMT

As the product molecule AB becomes more complex, the value of kr decreases because the combination energy is distributed among more and more vibrational modes. The concentration of the third body, M , is usually related directly to the pressure since in the atmosphere M is the sum of N2 and 02. The concentration of M at which the reaction rate behavior changes from third-order to second-order is lower the more complex the product molecule. Combination of two hydrogen atoms to form H2 is...

Human impact on the marine environment MarineEcology

Thu, 14 Jun 2012 12:11:26 GMT

Only a hundred years or so ago, it would have seemed inconceivable that anything we did could significantly affect the vast resources of the oceans or result in large-scale alterations and damage to marine ecosystems. We have already seen in Chapter 9 that this is no longer true for fishery resources. Modern technology has resulted in a huge increase in our ability to catch and store edible marine species. Many or most important fishery stocks are now being exploited at levels considered to be...

Urban Temperatures ClimatesWeather

Thu, 14 Jun 2012 11:14:42 GMT

Temperatures measured at street level in large cities can be several degrees higher than those in the surrounding countryside Figure 3.17 . Isotherms on a map of an isolated city and its environs look like the height contours of an island, which leads to the clumsy notion of an 'urban heat-island effect' a simpler term is urban heating. It is evident in some cities during the day but is particularly apparent at night, being often greatest at about 9 p.m., because city surfaces cool more slowly...

Looking at Bills resource costs Energy Efficient Homes

Thu, 14 Jun 2012 00:39:23 GMT

Bill lists his resource costs as follows i Bill called PG amp E and got four years' worth of history, broken down by month. Figure 3-1 shows one of Bill's typical electric utility bills. The bill is for the period from 1 12 2007 to 2 12 2007. The total for the bill is 403.30. i Because they have a well, Bill doesn't have a water bill, but the cost of his water supply shows up on his electric bill because the well is powered by an electric pump. i The household fills a 64-gallon trash container...

The Political Opportunity Structure Of Nations EnvironmentalPolitics

Wed, 13 Jun 2012 14:12:29 GMT

The nature and structure of political institutions in states influence the development of environmental interests, parties, and movements, as well as counter-movements in opposition to them. In this chapter we have focused on three institutional arrangements federalism versus unitary state systems, concentrated versus dispersed powers, and constitutional versus authoritarian systems with a special focus on court systems . These institutional arrangements are relatively invariant. In most cases,...

The Kyoto structure for the longer term Economics of Climate Change

Wed, 13 Jun 2012 13:44:24 GMT

Although debate about Kyoto has tended to focus almost obsessively on the first period commitments, the basic intent is to provide the structure for a dynamic, evolving regime that can effectively tackle climate change over the course of the century. The current set of emission targets for the first commitment period represent the first concrete step in a much longer-term process of negotiating emission commitments over successive periods. Negotiations on second period commitments are due to...

Discounting in Growth and Climate Change Global Warming Policies

Mon, 11 Jun 2012 04:29:04 GMT

Questions of discounting are central to understanding economic growth theory and policy. They also lie at the heart of the Stern Review's radical view of the grave damages from climate change and the need for immediate steps to sharply reduce GHG. This section reviews some of the core issues, while the next section provides an empirical application of alternative approaches. Debates about discounting have a long history in economics and public policy. Discounting involves two related and...

The Clash Between Social Ecology And Deep Ecology EnvironmentalEthics

Sun, 10 Jun 2012 02:25:32 GMT

Despite Bookchin's theoretical brilliance, decades of activism and writing, and comprehensive formulation of Social Ecology, his divisiveness marred his contribution and damaged the ecological cause. His sectarianism manifested itself in his attack on Deep Ecology during the 1980s and 1990s. The ensuing conflict between Deep Ecology and Social Ecology contributed to polarizing the environmental movement into nature and social justice camps, the very schism that Bookchin was striving to...

The Kyoto Mechanisms in Action GlobalEconomy

Sat, 09 Jun 2012 20:41:04 GMT

The Kyoto Protocol's flexibility mechanisms link countries that have a shared interest in creating projects to reduce greenhouse gas emissions harnessing industrial countries' interest in investing in lower-cost efficiency projects overseas and pairing that with developing countries' interest in receiving financing and cleaner technologies. International carbon finance flows to developing countries could climb as high as 100 billion a year in coming decades, according to U.N. estimates, roughly...

Watershed EnvironmentalScience

Sat, 09 Jun 2012 13:29:39 GMT

Streams and rivers get their water from the areas around them, including hills, valleys, and mountains. The water runs downhill to existing grooves like stream or river beds. During hot months, these dry out but are refilled by rain or melting snow later in the season. The geographical region from which a stream gets water is called a drainage basin or watershed. The boundary between two watersheds is called a divide. The continental divide in North American is the high line running through the...

Fuel Cell Designs EnergyTechnology

Fri, 08 Jun 2012 00:48:36 GMT

A fuel cell consists of an electrolyte that is sandwiched between two electrodes Figure 1.25 . A large variety of fuel cell designs exist, which include the following Phosphoric acid fuel cell PAFC Phosphoric acid electrolyte with platinum catalyst. It can use hydrocarbon fuel and is suited for stationary applications. It can generate both electricity and steam. As many as 200 units in sizes ranging from 200 kW to 1 mW are in operation. Proton exchange membrane PEM Solid organic polymer...

Sustainability HumanityEarth

Thu, 07 Jun 2012 15:48:38 GMT

More than 50 years ago, economist Joseph Schumpeter described the dynamic pattern in which innovative upstarts unseat established firms as creative destruction.1 Whereas most twentieth-century economists focused on competition under conditions of static equilibrium, Schumpeter insisted that disequilibrium was the driving force of capitalism. There is now little doubt that the economy is driven by firms that are able to capitalize on the new combinations described by Schumpeter Coal Age...

Effect of environmental change on global rates of landsliding EnvironmentalChange

Mon, 04 Jun 2012 19:20:02 GMT

A recurring theme of this chapter is the importance of water in destabilising slopes and in influencing how quickly and how far a landslide can travel. A key feature is the length of time for which rock and soil remain saturated with water. The amount and duration of water retention increase as the rate of water supply becomes ever greater than the rate of water escape from a slope. Of these two factors, it is the rate of water supply that appears generally to be more susceptible to...

The Idea of Wilderness EnvironmentalHistory

Mon, 04 Jun 2012 18:31:19 GMT

The concept of wilderness is one of the most complex ideas in environmental and human history. As environmental historian Roderick Nash pointed out in Wilderness and the American Mind 1967 , the word wilderness comes from old English and Germanic words, wildern and wildeor. Nash notes, The root seems to have been 'will' with a descriptive meaning of self-willed, willful, or uncontrollable. From 'willed' came the adjective 'wild' used to convey the idea of being lost, unruly, disordered, or...

Seaweeds and plankton MarineEcology

Mon, 04 Jun 2012 17:10:56 GMT

Dickinson, C.I. 1963 . British Seaweeds. London, Eyre and Spottiswoode. Hiscock, S. 1979 . A field key to the British brown seaweeds. An AIDGAP key reprinted from Field Studies, 5, 1- 44. Hiscock, S. 1986 . A field key to the British red seaweeds. An AIDGAP key. Field Studies Council Occasional Publication No. 13. Maggs, C.A. and Howson, C.M. undated . A photographic guide to some common subtidal seaweeds of the British Isles. Ross-on-Wye, Marine Conservation Society. Newell, G.E. and Newell,...

Consumption and Satisfaction The Human Future

Sat, 02 Jun 2012 03:02:03 GMT

With rising consumption calling into question the sustainability of the human enterprise, it seems appropriate to inquire into the deeper reasons for its continued expansion. Increased consumption, at least at the individual level, is generally considered an unqualified blessing. But what is the evidence for this Certainly, if a poor African farmer is consuming a diet of mostly maize meal that supplies 1,900 kilocalories per day, she would benefit greatly by an increase to 2,400 calories...

References Mol The Science of Climate Change

Thu, 31 May 2012 05:21:27 GMT

Adkins, J.F., Boyle, E.A., Keigwin, L. and Cortijo, E. 1997 Variability of the North Atlantic thermohaline circulation during the last interglacial period. Nature 390, 154-6. Arnell, N. 1999 The effects of climate change on hydrological regimes in Europe a continental perspective. Global Environmental Change 9, 5-23. Bengtsson, L., Roeckner, E. and Stendel, M. 1999 Why is global warming proceeding much slower than expected Journal of Geophysical Research-Atmospheres 104, 3865-76. Bretherton,...

TURNING THE TIDE An Introduction Save Our Seas

Wed, 30 May 2012 08:18:30 GMT

The ocean is alive. The waves change shape constantly, mesmerizing us with their infinite variations on a theme. The sound of the surf is soothing background music for contemplation. The vast panorama and the roar of breaking waves inspire awe and expansive thoughts. Changes in perspective offer glimpses of the ocean's nature. At night, the waves sometimes glow with the light of tiny organisms excited by the surf. I leave bioluminescent swirls behind as I swim through warm water in the...

Iii Climate System Dynamics ClimateChange

Fri, 25 May 2012 05:12:41 GMT

We need a strategy to investigate the dynamics of the climate system, because we lack sufficient data to describe the behavior of the climate Figure 6 Height-time cross section of the zonally averaged -component of simulated wind field over the equator. Units are m s ', and intervals are 6 units. Full lines are for positive values broken lines are for negative values. system. One way to overcome our lack of data is to recover hidden data and use paleo-data. However, note that the accuracy of...

The Internal Combustion Automobile Engine Stop Global Warming

Thu, 24 May 2012 14:16:13 GMT

Over the last 25 years, interest in hydrogen has resulted in a number of projects for the conversion of standard automobiles to hydrogen fuel. The early projects in the United States 200 were performed by the following organizations University of Southern California, University of Miami Florida , University of Denver Research Institute, Los Alamos Scientific Laboratory, and Billings Energy Company Utah . Today Hydrogen Components Incorporated, in Denver Colorado will convert any ground-based...

London A Strategic Vision on Renewable Energy Supply and Use UrbanEnergy

Wed, 23 May 2012 04:43:54 GMT

London's energy planning picture is complex, bound up in the recent reformation of regional government linking together the 33 local authorities that make up London.2 Unlike prior forms of regional government, for the first time London now has a popularly elected Mayor operating in a strong mayor form of government Travers 2004 . First elected mayor in 2000, and then again in 2004, Ken Livingstone has made energy planning a priority since he took office. In doing so, the mayor inserted regional...

Climatic effects of volcanic eruptions MassExtinctions

Mon, 21 May 2012 16:39:54 GMT

In New England, 1816 was called 'the year without a summer', with average temperatures in June 7 F 4 C below normal. The consequence was serious crop failures. The situation was even worse in Europe disastrous crop failures led in places to famine, and the price of grain shot up dramatically. This unusual climate has been widely attributed to the eruption of Tambora in the Sunda Arc in the previous year. It should, however, be pointed out that there were other cold years in the early nineteenth...

Stealing from the Rich to Give to the Poor Human Population Growth

Mon, 21 May 2012 10:44:27 GMT

Agriculture hardly sounds insidious, for it was one of humanity's greatest discoveries, allowing human populations the grandeur they have known for thousands of years. But not only was the human way of life changed forever so was the face of the earth. Land was cleared for crops and grazing herds. Wild plants and animals were pushed aside for their domesticated cousins. And the sixth mass extinction began in earnest, quietly and gradually overshadowing the earlier hunting and foraging effects...

Frontal Systems Meteorology

Sun, 20 May 2012 13:55:10 GMT

In the northern hemisphere, warm air flows from south to north along the leading sides of low-pressure systems, and cool or cold air streams from the north and west on the trailing sides. This results in a pattern similar to that shown by Fig. 4-1. In the southern hemisphere, warm air moves from north to south along the leading side of a clockwise-rotating low-pressure system cold air blows from the southwest or west along the trailing side. Poleward-moving warm air produces clouds and showers...

Index Clean Energy Economy

Thu, 17 May 2012 19:05:43 GMT

A123 Systems, 49, 57, 272 Adofo-Wilson, Baye, 125-29 Advanced Research Projects Agency- Energy ARPA-E , 282-83 AFL-CIO Housing Investment Trust, 264 Agriculture as base for biofuels, 17273 food production issues, 159-60, 163-64 sugarcane in Brazil, 160, 163 and 25x'25 coalition, 20, 24650 U.S. exports of, 158-60, 303-4. See also Biomass crops Alcoa, 212 Algae, 125, 170-71 Allen, Charles, 314-15 Allen, Paul, 148 Alliance to Save Energy, 101, 268, 271 Alternative energy. See Biofuels Energy...

References Hpz The Lifespan Of Earth

Thu, 17 May 2012 07:01:24 GMT

1. Ries LAG, et al. SEER Cancer Statistics Review, 1975 2004. 2007, National Cancer Institute Bethesda, MD. http seer.cancer.gov csr 1975 2004 . 2. Pui CH, and Evans WE. Treatment of acute lymphoblastic leukemia. N Engl J Med 2006 354 2 166 78. 3. Jemal A, et al. Cancer statistics, 2006. CA Cancer J Clin 2006 56 2 106 30. 4. Oeffinger KC, et al. Grading of late effects in young adult survivors of childhood cancer followed in an ambulatory adult setting. Cancer 2000 88 7 1687 95. 5. Hewitt M,...

Balance of Payments Equilibrium Condition Globalization and the Environment

Mon, 14 May 2012 16:12:06 GMT

BP equilibrium requires that total receipts R from exports X and capital inflows K be equal to imports M, i.e. where K nominal value of capital inflow. Taking total differential of PXCK and of PME, we obtain X dP C P dX C dK ME dP C PE dM C PM dE 23.7 Dividing the LHS of 23.2 by R and the RHS by PME, we have 6p C Ox C l-O k z p c m C e 23-9 where 0 share of export in total receipt to pay for import, i.e., 0 PX R 1 0 share of capital inflow in total receipt, i.e., 1 0 1 PX R K R k percent change...

Notes 1 Moving Freight Without Oil

Mon, 14 May 2012 14:15:46 GMT

1 Table 1.1 is based on Table 10.3, p307, of Christian 2004 . That table is 2004 by the University of California Press and is used here with permission. 2 The economist is William Baumol of New York University, quoted in Hensel, B, 'Globalization, a sea change in shipping when containers came to Houston, it marked an industry milestone', Houston Chronicle, 23 April 2006, The quotations in Box 1.1 are respectively from pp1, 1-2, 2, 5, 7, 10-11 and 268 of Levinson 2006 . They are 2006 by the...

Coping with a Warmer World Save Our Seas

Mon, 14 May 2012 03:01:33 GMT

Fortunately, the same actions that we take to reduce the direct threats to coral reefs may also help reefs cope with less direct threats like climate change. Kelp forests seem to be able to persist in marine reserves, even when kelps all around them are dying when the water is warm and unproductive as a result of El Ni os . In a similar way, coral reefs might be less subject to mass coral bleaching, or perhaps better able to recover, if other stresses were eliminated or reduced. Bleaching may...

Extrapolating Technological Progress The Economic Growth

Sun, 13 May 2012 23:27:01 GMT

The standard neoclassical growth model assumes growth in equilibrium, driven by an external force called 'technological progress' or total factor productivity TFP . Goods and services are abstractions. Demand for energy exergy or other resources is a consequence, not a cause of economic growth. Silly as it sounds when stated explicitly, resources in such models are treated as if they were created by some combination of capital and labor. This is why growth, in this idealized model, does not...

Estimated Mean Global Temperature Paleoclimatology

Sun, 13 May 2012 09:45:58 GMT

FIGURE I. I Generalized temperature history of the Earth plotted as relative departures from the present global mean from Frakes et al., 1992 . Studying the proxy record of paleodimate is rather like looking through a telescope held the wrong way around for recent periods there is evidence of short-term climatic variations, but these cannot be resolved in earlier periods. It is abundantly clear from the paleodimate record that abrupt changes have occurred in the global climate system at certain...