HR: 09:00h
AN: B51E-05    [Abstracts]
TI: Seasonal Rectifier Effects in Atmospheric Potential Oxygen (APO) and CO2
AU: * Nevison, C D
EM: nevison@ucar.edu
AF: National Center for Atmospheric Research, P.O. Box 3000, B oulder, CO 80307-3000, United States
AU: Mahowald, N M
EM: nmm63@cornell.edu
AF: Cornell University, 2140 Snee Hall, Ithaca, NY 14853, United States
AU: Doney, S C
EM: sdoney@whoi.edu
AF: WHOI, Clark 424, Woods Hole, MA 02543, United States
AB: The CO₂ seasonal rectifier contributes to the latitudinal gradient in atmospheric CO₂ predicted by forward transport models and influences atmospheric CO₂ inversions accordingly. The actual strength of the CO₂ rectifier can not be directly observed due to uncertainties in terrestrial CO₂ sinks. Forward transport model simulations also produce a seasonal rectifier in the complementary tracer atmospheric potential oxygen (APO = O₂/N₂ + 1.1 CO₂). Since APO in principle is free from terrestrial influences, comparison of a model-derived rectifier to observations should be more straightforward for APO than for CO₂. This presentation will discuss the seasonal rectifier in APO and its relation to the CO₂ rectifier based on forward simulations of the MATCH atmospheric transport model and archived results from the Transcom 3 and APO Transcom experiments.
DE: 0322 Constituent sources and sinks
DE: 0414 Biogeochemical cycles, processes, and modeling (0412, 0793, 1615, 4805, 4912)
DE: 0426 Biosphere/atmosphere interactions (0315)
DE: 4806 Carbon cycling (0428)
SC: Biogeosciences [B]
MN: 2007 Fall Meeting