U.S. JGOFS SMP

U.S. JGOFS Synthesis & Modeling Project
Eileen E. Hofmann John M. Klinck Walker O. Smith Barbara B. Prézelin
Comparative modeling and data analysis studies for the Ross Sea and West Antarctic Peninsula regions: A JGOFS synthesis and modeling project NSF
PROJECT DESCRIPTION:	We propose to develop a suite of physical and biological models that incorporate data sets collected in the Ross Sea as part of the U.S. Southern Ocean Joint Global Ocean Flux Study (JGOFS) and data sets from the west Antarctic Peninsula region collected during the Palmer Long-Term Ecological Research program. The modeling effort will be in conjunction with analyses of these data sets as well as analyses of historical data sets from the two regions. The intent of the data analyses and modeling activities is to provide syntheses that allow comparison of similarities and differences in the two systems and thereby allowing fundamental questions on the controls of phytoplankton productivity and growth in these two systems to be addressed. Our general focus is on understanding the role of light, macro- and micronutrient limitation, and circulation in producing the observed horizontal and vertical gradients in phytoplankton distribution and production. Thus, the data analyses and model simulations will be used to test specific hypotheses concerning the regulation of phytoplankton growth, production, and species composition in the two regions. This study will directly address several of the major Synthesis and Modeling Project research themes, especially those related to understanding processes controlling primary production and export production. Also, the incorporation data sets from another region of the Antarctic provides a mechanism for placing the observations obtained during the U.S. JGOFS Southern Ocean program into a broader context. This study will be the first to systematically compare and contrast regions of the Antarctic in this manner. We believe that the results of our collaborative research will have a significant impact on development of trophic level models within the Southern Ocean, and also have implications for ecosystem level studies in other regions of the world ocean.
DATA:	Model results for the Ross Sea and West Antarctic Peninsula regions
PUBLICATIONS:	Dinniman, M.S., J.M. Klinck and W.O. Smith, Jr. 2003. Cross shelf exchange in a model of the Ross Sea circulation and biogeochemistry. Deep-Sea Research II, 50(22-26), 3103-3120, doi:10.1016/j.dsr2.2003.07.011 Hofmann, E.E. and Y.S. Husrevoglu. 2003. A circumpolar modeling study of habitat control of Antarctic krill (Euphausia superba) reproductive success, Deep-Sea Research II, 50(22-26), 3121-3124, doi:10.1016/j.dsr2.2003.07.012 Smith, W.O., Jr., M.S. Dinniman, J.M. Klinck and E.E. Hofmann. 2003. Biogeochemical climatologies of the Ross Sea, Antarctica: seasonal patterns of nutrients and biomass. Deep-Sea Research II, 50(22-26),3083-3101, doi:10.1016/j.dsr2.2003.07.010 Prezelin, B.B., E.E. Hofmann, M. Moline and J.M. Klinck, 2004. Recognizing Physical Forcing of Phytoplankton Community Structure and Primary Production in Continental Shelf Waters of the Western Antarctic Peninsula: Synthesis and Analyses of Five Seasonal Cruises. Journal of Marine Research, in press.
RELATED PROJECTS:	Friedrichs; et al. "Regional ecosystem model testbeds. A JGOFS synthesis and modeling project." Hofmann "Evaluation of marine primary productivity in the tropical Pacific and Atlantic Oceans using satellite ocean color and numerical models"
INVESTIGATOR INFORMATION:	Eileen E. Hofmann Center for Coastal Physical Oceanography Crittenton Hall Old Dominion University 768 West 52nd Street Norfolk, VA 23529 tel: (757) 683-5334 fax: (757) 683-5550 hofmann@ccpo.odu.edu http://www.ccpo.odu.edu:80/Facstaff/faculty/hofmann.html John M. Klinck Center for Coastal Physical Oceanography Crittenton Hall Old Dominion University 768 West 52nd Street Norfolk, VA 23529 tel: 757-683-6005 klinck@ccpo.odu.edu http://www.ccpo.odu.edu:80/Facstaff/faculty/klinck.html Walker O. Smith Virginia Institute of Marine Science Greate Road Box 1346 Gloucester Point, VA 23062 tel: 804-684-7709 fax: 804-684-7293 wos@vims.edu http://www.vims.edu/bio/plankton/smith_wo.html Barbara B. Prézelin Biological Sciences Ecology, Evolution and Marine Biology Santa Barbara, CA 93106 tel: 805-893-2879/4319 fax: 805-893-4724 barbara@icess.ucsb.edu http://lifesci.ucsb.edu/EEMB/faculty/prezelin/