HR: 10:20h
AN: B11F-01 INVITED     [PDF]
TI: The Biogeochemical Influences of Dust Deposition in a Global Ocean Ecosystem Simulation
AU: * Moore, J K
EM: jkmoore@uci.edu
AF: University of California, Irivine, Earth System Science, Croul Hall, Irvine, CA 92697 United States
AB: Global ocean simulations of ocean biogeochemistry are driven with model estimates of atmospheric dust transport and deposition as a key source of iron to the upper ocean. The coupled Biogeochemistry/Ecosystem/Circulation (BEC) model includes explicit phytoplankton functional groups that compete for available light and several potentially growth-limiting nutrients - nitrogen, phosphorus, silicon, and iron. Diatoms, coccolithophores, picoplankton, and nitrogen fixing diazotrophs are represented in the model. These different classes of phytoplankton experience differential grazing pressure and other loss terms in the model. Global scale patterns in nutrient limitation, primary production, carbon export out of surface waters, and nitrogen fixation are all sensitive to variations in atmospheric dust deposition. Dust deposition also significantly influences the competition between phytoplankton groups (diatom vs. non-diatoms, n-fixers vs. picoplankton). The potential impacts of climate driven variations in dust deposition to the oceans will be discussed.
UR: http://www.ess.uci.edu/~jkmoore/
DE: 0400 Biogeosciences
DE: 1615 Biogeochemical processes (4805)
DE: 4806 Carbon cycling
DE: 4845 Nutrients and nutrient cycling
SC: Biogeosciences [B]
MN: 2003 Fall Meeting