Data Management
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Surveying the state of ocean acidification along the U.S. West Coast
PMEL Sustained Ocean Acidification Biogeochemical and Ecological Survey Observations
Why we care
U.S. West coast-wide hydrographic surveys have been conducted intermittently from 2007 to 2017, providing evidence for the geographic extent and severity of ocean acidification in the continental shelf ecosystem. Scientists on the NOAA West Coast Ocean Acidification (WCOA) discovered that the combined effects of anthropogenic and biologically-derived carbon dioxide resulted in significant biological impacts for oyster larvae and pteropods, which are small, ecologically important mollusks for the food web.
What we are doing
This project executes a large-scale survey of ocean acidification carbonate chemistry in the California Current System and continues processing data and publishing scientific papers based on 2016 and 2017 surveys findings. This survey determines the spatial distributions of temperature, salinity, pH, dissolved inorganic carbon, total alkalinity, oxygen, nutrients, and biological parameters along the west coast of North America. Survey results will provide the basis for accurate assessments of changing ocean chemistry in the following areas: 1) spatial variability; 2) extent and causes of long-term changes in carbonate system parameters and their impacts on calcifying (shell-building) organisms; and 3) empirical relationships for obtaining high-resolution information on ocean acidification collected on moorings.
Benefits of our work
This project links the combined stressors of increased temperature, acidification, and hypoxia (low oxygen) with effects on marine organisms in the region and identifies spatial variability of acidifying conditions during the spring/summer upwelling season. In addition to scientific partners, this project engages a NOAA Teacher At Sea (TAS) fellow on the cruise to help develop outreach and education on West Coast ocean acidification.
Evaluating impacts of acidification on biological processes in the Gulf of Mexico
Evaluation of OA impacts to plankton and fish distributions in the Gulf of Mexico during GOMECC-4 with a focus on HAB-interactions
Why we care
Ocean change in the Gulf of Mexico, including acidification and eutrophication, can impact biodiversity and the flow of energy through ecosystems from microscopic phytoplankton to higher trophic levels like fish. These processes can impact the health of fisheries and coastal ecosystems. This project collects information to evaluate the links between ocean conditions and important species in the Gulf of Mexico.
What we are doing
During the 4th Gulf of Mexico Ecosystem and Carbon Cruise (GOMECC-4), scientists collect samples of phytoplankton, zooplankton, and ichthyoplankton to characterize fish distribution and abundance, larval fish condition and diet, microplastic abundance, and harmful algal bloom species. These collections coincide with measurements of acidification, oxygen, and eutrophication to make connections between ocean chemistry and biology.
Benefits of our work
This project will help characterize how changes in ocean conditions interact with biological processes like harmful algal bloom formation and ecosystem productivity that are important to local fisheries and stakeholders.