Ocean acidification

Effects of ocean acidification on the growth, shell integrity, and vulnerability to thermal stress and predation in Pacific oysters (Magallana gigas), and bay mussels (Mytilus spp.)

cwitkowskiafe728feba — Fri, 17 Apr 2026 12:00:00 +0000

The ocean is absorbing approximately one third of the anthropogenic carbon dioxide (CO₂) emissions to the atmosphere. As a result, the pH of the ocean is declining steadily, a phenomenon known as ocean acidification (OA). This decline in pH and the associated reductions in calcium carbonate saturation states of the water can have widespread consequences […]

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Synergistic effects of ocean acidification and thermal stress on shell biomineralization and parasitism in the white clam Leukoma asperrima (Bivalvia: Veneridae)

cwitkowskiafe728feba — Fri, 17 Apr 2026 11:59:00 +0000

Ocean acidification (OA) and global warming are fundamentally altering the biomineralization processes of calcifying marine organisms. This study evaluates shell malformations and parasitism in the white clam Leukoma asperrima at Bique Beach, Panama, from December 2024 to November 2025. Environmental parameters (pH, temperature) were monitored monthly across two sampling stations (n=1100). Results indicate that 13.6% […]

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Webinar: “communicating ocean acidification in a changing world”

cwitkowskiafe728feba — Fri, 17 Apr 2026 11:58:00 +0000

Webinar: “Communicating Ocean Acidification in a Changing World” 📅 Wednesday April 22, 2026 | 🕐 12:00pm- 1:30pm EST | 📍Online Event Register here For more than a decade, scientists and NGO partners have tried to communicate the basics of ocean acidification. What is it? What is it caused by? Why should we care? What should we do? Join the discussion […]

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Register now: life on the extremes: why ocean acidification hits differently on the coasts

cwitkowskiafe728feba — Thu, 16 Apr 2026 12:00:00 +0000

Tuesday, May 19, 2026 – 7:00pm – 8:30pm Sign up online Event Details The ocean and other water bodies absorb nearly a third of human-emitted carbon dioxide (CO2). However, once dissolved, CO2 lowers the water’s pH, and makes it more acidic—a phenomenon known as ocean acidification. In coastal waters like Chesapeake Bay, acidification plays out differently than in […]

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HELCOM strategic approach to ocean acidification

cwitkowskiafe728feba — Thu, 16 Apr 2026 11:59:00 +0000

Acidification of the global oceans is a major trend. In the past, a well-documented trend of increasing alkalinity has partly counter acted drivers of acidification in the Baltic Sea. However, decrease in pH has been observed in areas of intense respiration of organic matter and hypoxia. General long-term projection indicates intensified acidification of the Baltic […]

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Quantifying the role of land-based inputs on coastal ocean acidification from a tropical semi-arid region

cwitkowskiafe728feba — Wed, 15 Apr 2026 12:00:00 +0000

The land-based inputs in the form of river discharge, wastewater runoff, and submarine groundwater discharge (SGD) are among the major land-based natural pathways for the Coastal Ocean Acidification (COA). This study evaluates the direct influence of these land-based drivers, along with the aerosol deposition, and in-situ biogeochemical processes on COA along a highly populated tropical […]

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Future projections of compound events around the Main Hawaiian Islands

cwitkowskiafe728feba — Wed, 15 Apr 2026 11:59:00 +0000

The consequences of overlapping environmental stressors — referred to as compound events — may be more harmful to marine ecosystems than as individual stressors. Using recently conducted submesoscale-permitting future projections for the Main Hawaiian Islands, we present the first assessment of future compound events for Hawaiian waters. Our analysis focuses on surface and sub-surface heat-stress, […]

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NOAA PMEL scientists provide analysis and expertise for 2026 California Coast and Ocean Assessment report

cwitkowskiafe728feba — Tue, 14 Apr 2026 12:00:00 +0000

California’s 2026 Coast and Ocean Assessment was released in March by the California Ocean Protection Council (OPC), in partnership with the California Ocean Science Trust. This coast and ocean assessment is the result of the work of more than 120 scientific experts from academic institutions, state and federal agencies including NOAA, NGOs, and Tribes. The report […]

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Effects of pH on phytoplankton growth and diversity in a tropical coastal bay: an experimental study

cwitkowskiafe728feba — Tue, 14 Apr 2026 11:59:00 +0000

This research was intended to investigate the effects of reduced pH on the growth rates and diversity of phytoplankton in the coastal waters of Visakhapatnam in the Bay of Bengal. A short-term (six days) microcosm experiment was conducted with different pH conditions such as ambient (control-in situ pH), pH 8.0 (0.2 pH units drop from […]

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Acidification in the Earthʼs oceans: trends and persistence

cwitkowskiafe728feba — Mon, 13 Apr 2026 12:00:00 +0000

This paper applies fractional integration methods to obtain evidence on ocean acidification, namely the decrease in the pH level in the Earth’s oceans, using the annual Hawaii Ocean Time-series Station ALOHA series as well as the logged one for the period 1985-2024. The chosen modelling framework is more general than standard ones based on the […]

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