SOCAN webinar: “Modeling ocean circulation and biogeochemical variability in the Southeast U.S. coastal ocean and Gulf of Mexico”, 28 July 2015

Presented by Ruoying He, North Carolina State University

Date & time: Tuesday, 28 July 2015, 12:00pm ET

Abstract

Changing climate and rising atmospheric CO2 coupled with impacts of human activity, have the potential to dramatically alter coupled hydrologic-biogeochemical processes and associated movement of water, carbon, and nutrients through various terrestrial reservoirs. Such changes will result in dramatic alterations in terrestrial environments, biogeochemistry, and delivery of dissolved and particulate materials into rivers, estuaries, and coastal ocean waters. This may lead to vulnerabilities of coastal ecosystems to warming temperatures, stratification, altered freshwater and nutrient exports, eutrophication, hypoxia, and ocean acidification. Further, coastal and open ocean waters are impacted directly by increasing atmospheric CO2, compounding the effects. This presentation will describe a coupled physical-biogeochemical modeling effort that is aimed at stimulating and examining temporal and spatial variability of coastal circulation and biogeochemical cycling in the southeast U.S. coastal ocean and Gulf of Mexico. The model is driven by realistic atmospheric forcing, open boundary conditions from a data assimilative global ocean circulation model, and observed (or model predicted) freshwater and terrestrial nitrogen input from major rivers. Long-term model simulations were performed, and validated against in-situ and satellite observations. The ultimate goal is todevelop a regional impact assessment and predictive capabilities for coastal ocean ecosystems in the southeast U.S. and Gulf of Mexico to support decision making and management of the combined impacts of ocean acidification (OA), eutrophication, and hypoxia, and to offer a wider marine ecosystem context for carbonate system measurements and monitoring undertaken by NOAA and other agencies.

Brief biography

Ruoying He received a Ph.D. in Physical Oceanography from the University of South Florida. He is a Distinguished Professor of Oceanography in the Department of Marine, Earth and Atmospheric Sciences at North Carolina State University and an adjunct scientist of Woods Hole Oceanographic Institution. His research interests include coastal circulation dynamics, numerical modeling and data assimilation, bio-physical interactions, and air-sea interactions. His research team at NC State uses in situ and remote sensing observations, numerical modeling analyses, and assimilation methods to examine fundamental ocean circulation physics and to gain an integrated understanding of their interactions with the atmosphere and with ocean biological, geological, and chemical processes.

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