HR: 16:45h
AN: OS22D-04    [PDF]
TI: A better particulate organic carbon (POC) distribution below 1000 meters in the ocean: mineral ballasting in the HAMOCC5 ocean general circulation model.
AU: * Howard, M T
EM: mthoward2@wisc.edu
AF: University of Wisconsin-Madison, 1225 W. Dayton, Madison, WI 53706
AU: Winguth, A M
EM: amwinguth@facstaff.wisc.edu
AF: University of Wisconsin-Madison, 1225 W. Dayton, Madison, WI 53706
AB: Work by Armstrong et al. (Deep-Sea Research II 49 (2002) 219) and Klaas and Archer (Global Biogeochem. Cycles 16 (2002) 63) has established that organic carbon rain to depths of greater than 1000 meters in the ocean is closely correlated with the rain of the ballast minerals CaCO$_{3}$, opal, and lithogenic material. Their work supplants the Martin curve, until now widely used in OGCMs. The HAMOCC5 three-dimensional ocean carbon cycle model used in this study has substantial improvements to the model used by Klaas. The improvements include an increased vertical resolution to twenty-two layers, the ten layer sediment model with pore-water chemistry of Heinze and Maier-Reimer, and the detailed ecosystem model of Six and Maier-Reimer with a three day time step for the marine biota. The higher temporal resolution and ecosystem model allows the effects of the seasonal cycle of plankton blooms on POC fluxes to be evaluated. In addition, regional tracer distributions are evaluated and compared with earlier model runs and observational data.
DE: 0330 Geochemical cycles
DE: 0400 Biogeosciences
SC: Ocean Sciences [OS]
MN: 2003 Fall Meeting