[PAST EVENT] Hypoxia in the northern Gulf of Mexico: Temporal & spatial scales of ocean processes

March 2, 2012
VIMS - Watermen's Hall, McHugh Auditorium
1375 Greate Road
Gloucester Point, VA 23062Map this location
Dr. Steve DiMarco
Associate Professor, Department of Oceanography, Texas A&M University

"Temporal and spatial scales of ocean processes influencing the hypoxic region of the northern Gulf of Mexico"

Reception at 3:00 p.m. in the Watermen's Lobby
Seminar from 3:30 p.m. to 4:30 p.m. in McHugh Auditorium

Dr. DiMarco received his B.A. in Physics from the University of Dallas in 1985 and received his M.S. and Ph.D. in Physics from the University of Texas at Dallas in 1988 and 1991, respectively. His research interests include Observational Oceanography and Ocean Observing Systems, Physical Oceanography of Gulf of Mexico and southwest Indian Ocean, Hypoxia of the northern Gulf of Mexico, Data Processing Methods, Nonlinear surface wave interaction, and Impact of extreme wind events on shelf circulation.

The Texas-Louisiana Shelf is home to a variety of oceanographic processes that impact the distribution of freshwater, dissolved nutrients, and particulate material. The processes occur on a wide range of temporal and spatial scales from hours to weeks to months and meters to kilometers. The Mechanisms Controlling Hypoxia project has been funded by NOAA-CSCOR since 2003 to investigate how wind, river discharge, and currents affect stratification and mixing over the Texas-Louisiana Shelf and to investigate how these processes contribute to the control of water column dissolved oxygen concentration. The project uses an integrated interdisciplinary approach comprised of extensive field observations and coupled numerical and multiple variable statistical models. The seminar will focus on principal findings made during 2010 and 2011 where multiple high-resolution field observations of the Texas-Louisiana Shelf were made using a shipboard undulating water-column profiler and moored observations of water column dissolved oxygen concentration off Texas and Louisiana. Multiple variable statistical analyses have revealed the relative role of alongshore winds and nutrient loading in contributing to the variability of the observed hypoxic area. Additionally, the results of an operational coupled physical-oxygen now/forecast model of the shelf, which debuted in summer 2011, will be presented.

[[seitz, Rochelle Seitz]] at 804-684-7698