Ocean Acidification at a Crossroad– Enhanced Respiration,Upwelling, Increasing Atmospheric CO2, and their interactions in the northwestern Gulf of Mexico”

Xinping Hu, Texas A&M University-Corpus Christi

Among the NOAA designated Large Marine Ecosystems, the Gulf
of Mexico (GOM) remains poorly understood in terms of its current OA conditions, despite its
ecological and economic significance. In the northwestern GOM (nwGOM), decadal
acidification has been observed in the shelf-slope region, with metabolic production of CO2
contributing to a larger fraction of CO2 accumulation than uptake of anthropogenic CO2, and the
observed rate of acidification is significantly greater than that in other tropical and subtropical
areas. Unfortunately, whether the observed OA in this region represents a short-term
phenomenon or a long-term trend is unknown.
It is hypothesized that increasing atmospheric CO2, increasing terrestrial nutrient export
due to an enhanced hydrological cycle, and enhanced upwelling due to climate change will cause
the continental shelf-slope region in the nwGOM to acidify faster than other tropical and

subtropical seas. In order to test this hypothesis wave gliders, in -stiu sensor along withe underway measurements from research vessels will measure carbonated chemistry in in surface and shallow  waters. Modeling will be used tp integrate the chemical signals into the models to hindcast/predict spatia; and temporal variation of the OA signal for the the optimization of monitoring design and implementation.

Tuesday, March 3, 2020

Optimizing Ocean Acidification Observations for Model Parameterization in the Coupled Slope Water System of the U.S. Northeast Large Marine Ecosystem

Grace Saba, Rutgers University

The U.S. Northeast Shelf Large Marine Ecosystem, supports some of the nation’s most economically valuable coastal fisheries, yet most of this revenue comes from shellfish that are sensitive to ocean acidification (OA). Furthermore, the weakly buffered northern region of this area is expected to have greater susceptibility to OA. Existing OA observations in the NES do not sample at the time, space, and depth scales needed to capture the physical, biological, and chemical processes occurring in this dynamic coastal shelf region. Specific to inorganic carbon and OA, the data available in the region has not been leveraged to conduct a comprehensive regional-scale analysis that would increase the ability to understand and model seasonal-scale, spatial-scale, and subsurface carbonate chemistry dynamics, variability, and drivers in the NES. This project optimizes the NES OA observation network encompassing the Mid-Atlantic and Gulf of Maine regions by adding seasonal deployments of underwater gliders equipped with transformative, newly developed and tested deep ISFET-based pH sensors and additional sensors (measuring temperature, salinity for total alkalinity and aragonite saturation [ΩArag] estimation, oxygen, and chlorophyll), optimizing existing regional sampling to enhance carbonate chemistry measurements in several key locations, and compiling and integrating existing OA assets. The researchers will apply these data to an existing NES ocean ecosystem/biogeochemical (BGC) model that resolves carbonate chemistry and its variability. 


Tuesday, March 3, 2020

Thursday, January 30, 12-1pm EST

New Insights into the Complexity of Estuarine Acidification Seminar

This virtual seminar will focus coupled a comprehensive measurement program to retrospective and future model simulations to quantify controls on estuarine acidification in Chesapeake Bay,a large estuarine complex with strong gradients of salinity, oxygen, metabolicrates, and bathymetry. Researched found that estuarine acidification may be even more complex (and interesting!) than originally posited, owing to self-buffering processes within macrophyte communities, connections of acidification rates to watershed management aimed at oxygen improvements, and a varying buffering of acidification through altered carbonate chemistry within freshwater sources. This new understanding presents both challenges and opportunities to managing future acidification along the coast.

 Please register at: https://noaabroadcast.adobeconnect.com/testa/event/registration.html

Thursday, January 23, 2020
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Ocean Acidification: Building on a Foundation at the Flower Garden Banks Sanctuary

Ocean Acidification: Building on a Foundation at the Flower Garden Banks Sanctuary

NOAA Ocean Acidification Program

Looking up at high-rise buildings, towering cathedrals, or the great pyramids at Giza; the feats of man seem unimaginable. The key to these massive architectural achievements is laying a quality foundation. Dr. Xinping Hu, an associate professor at Texas A&M Corpus Christi University, knows that a solid foundation is very important in science as well. Together with his co-investigators at NOAA’s Atlantic Oceanographic and Meteorological Lab (AOML), Texas A&M University, and Texas A&M University-Corpus Christi, Dr. Hu will be building upon a foundation of data collected both at and near the Flower Garden Banks National Marine Sanctuary (NMS) in the northwestern Gulf of Mexico to better characterize the changes in ocean chemistry over space and time in these waters.

There are many facets to a strong structure, architectural or scientific. Having the right tools and site to build, along with a skilled team of craftsmen, and an insightful foreman are all integral to conduct impactful science.


Thursday, November 7, 2019
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Strengthening the net: Ocean acidification observations in California

Strengthening the net: Ocean acidification observations in California

NOAA Ocean Acidification Program

A foggy morning on the central California coastline is a picturesque scene of rolling waves, screeching gulls, and fishermen hauling hefty nets teeming with fish. If you look closely at the net you observe that it is a framework of lines working together to capture a greater amount of fish than a single fishing line could capture alone. In the same way, ocean observing systems can be thought of as a net to capture what is happening with our ocean’s chemistry. But a net with gaps or holes is not very efficient, whether it be in fishing or in observing. A newly funded project by Dr. Chris Edwards, a Professor at the University of California Santa Cruz (UCSC), along with collaborators at UCSC and the Monterey Bay Aquarium Research Institute (MBARI) is taking a look at where ‘holes’ in our observing system are. The team will identify ways to fill those gaps in order to capture changing ocean chemistry along the California coast.
Tuesday, October 8, 2019
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