Study finds that ocean acidification has significantly compromised 40% of the global surface ocean, and 60% of the subsurface ocean.
Study finds ocean acidification is more pervasive than previously thought Read More »
Ocean acidification has been identified in the Planetary Boundary Framework as a planetary process approaching a boundary that could lead to unacceptable environmental change. Using revised estimates of pre-industrial aragonite saturation state, state-of-the-art data-model products, including uncertainties and assessing impact on ecological indicators, we improve upon the ocean acidification planetary boundary assessment and demonstrate that
Ocean Acidification: Another Planetary Boundary Crossed Read More »
NOAA’s Ocean Carbon Acidification Data System (OCADS) now includes the 2025 version of the Surface Ocean CO2 Atlas (SOCAT) database.
NOAA hosts newly released surface ocean CO2 data Read More »
This study provides a comprehensive evaluation of metabolic status in the northern Gulf of Mexico (nGOM) using high-resolution O2/Ar-derived net community production (NCP) and air-sea CO2 flux data from the Gulf of Mexico Ecosystems and Carbon (GOMECC) expedition in summer 2021. We found that the entire nGOM is a weak CO2 source to the atmosphere and net
Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, and terrestrial biosphere in a changing climate is critical to better understand the global carbon cycle, support the development of climate policies, and project future climate change. Here we describe and synthesize datasets and methodologies to quantify the five major
Global Carbon Budget 2024 Read More »
Join MACAN and NOAA OAP for the biennial state-of-the-science meeting and technical assistance workshop July 15-17 in Edgewater, Maryland.
MACAN 2025 State of the Science and Technical Training Workshop Read More »
Ocean acidification due to uptake of atmospheric CO2 is a concern in the open ocean. In contrast, pH in coastal systems has shown both decreasing and increasing long-term trends. A number of global and regional processes drive these diverse trends, including changes in nutrient loading, human-accelerated chemical weathering in watersheds, changes in acid-rain and land-use, as
Carbonate budget assessments quantify rates of calcium carbonate production and erosion from habitat-altering marine taxa and can be used to evaluate the potential for reef growth and the persistence of coral reef frameworks. Tracking the key ecosystem processes that control carbonate budgets is increasingly critical as climate change threatens to shift reefs toward net erosional
Estimating coral reef carbonate budgets using Structure‑from‑Motion photogrammetry Read More »
Impacts of low-latitude, explosive volcanic eruptions on climate and the carbon cycle are quantified by forcing a comprehensive, fully coupled carbon cycle-climate model with pulse-like stratospheric aerosol optical depth changes. The model represents the radiative and dynamical response of the climate system to volcanic eruptions and simulates a decrease of global and regional atmospheric surface
Sensitivity of atmospheric CO<sub>2</sub> and climate to explosive volcanic eruptions Read More »
We demonstrate the ability to obtain accurate estimates of pH and carbonate mineral saturation state (Ω) from an Argo profiling float in the NE subarctic Pacific. Using hydrographic surveys of the NE Pacific region, we develop empirical algorithms to predict pH and Ω using observations of temperature (T) and dissolved O2. We attain R2 values greater
Understanding seasonal changes in ocean acidification in Alaskan waters and the potential impacts to the multi-billion-dollar fishery sector is a main priority. Through work funded by NOAA’s Ocean Acidification Program, the Pacific Marine Environmental Laboratory developed a model capable of depicting past ocean chemistry conditions for the Bering Sea and is now testing the ability of this model to forecast future conditions. This model is being used to develop an ocean acidification indicator provided to fisheries managers in the annual NOAA Eastern Bering Sea Ecosystem Status Report.
The NOAA Ocean Acidification Program (OAP) works to prepare society to adapt to the consequences of ocean acidification and conserve marine ecosystems as acidification occurs. Learn more about the human connections and adaptation strategies from these efforts.
Adaptation approaches fostered by the OAP include:
Using models and research to understand the sensitivity of organisms and ecosystems to ocean acidification to make predictions about the future, allowing communities and industries to prepare
Using these models and predictions as tools to facilitate management strategies that will protect marine resources and communities from future changes
Developing innovative tools to help monitor ocean acidification and mitigate changing ocean chemistry locally
Drive fuel-efficient vehicles or choose public transportation. Choose your bike or walk! Don't sit idle for more than 30 seconds. Keep your tires properly inflated.
Eat local- this helps cut down on production and transport! Reduce your meat and dairy. Compost to avoid food waste ending up in the landfill
Make energy-efficient choices for your appliances and lighting. Heat and cool efficiently! Change your air filters and program your thermostat, seal and insulate your home, and support clean energy sources
Reduce your use of fertilizers, Improve sewage treatment and run off, and Protect and restore coastal habitats
You've taken the first step to learn more about ocean acidification - why not spread this knowledge to your community?
Every community has their unique culture, economy and ecology and what’s at stake from ocean acidification may be different depending on where you live. As a community member, you can take a larger role in educating the public about ocean acidification. Creating awareness is the first step to taking action. As communities gain traction, neighboring regions that share marine resources can build larger coalitions to address ocean acidification. Here are some ideas to get started:
