HR: 0800h
AN: A41C-0044
TI: Monthly Global Emissions of Anthropogenic CO2: Atmospheric CO2 Transport Calculations Based on NASA Data Assimilation
AU: * Erickson, D
EM: ericksondj@ornl.gov
AF: Oak Ridge Natioinal Laboratory, 1 Bethel Valley Rd., Oak Ridge, TN 37831 United States
AU: Blasing, T
EM: blasingtj@ornl.gov
AF: Oak Ridge Natioinal Laboratory, 1 Bethel Valley Rd., Oak Ridge, TN 37831 United States
AU: Hoffman, F
EM: hoffmanfm@ornl.gov
AF: Oak Ridge Natioinal Laboratory, 1 Bethel Valley Rd., Oak Ridge, TN 37831 United States
AU: Mills, R
EM: rmills@ornl.gov
AF: Oak Ridge Natioinal Laboratory, 1 Bethel Valley Rd., Oak Ridge, TN 37831 United States
AU: Zhu, Z
EM: z.zhu@nasa.gov
AF: NASA Goddard Space Flight Center, 1 Soil Conservation Rd., Greenbelt, MD 20771 United States
AU: Kawa, S
EM: stephan.r.kawa@nasa.gov
AF: NASA Goddard Space Flight Center, 1 Soil Conservation Rd., Greenbelt, MD 20771 United States
AB: We present monthly estimates of the global emissions of anthropogenic CO2. We posit that high temporal estimates of anthropogenic CO2 fluxes will impact the seasonal cycle of atmospheric CO2 concentrations and will impact inversion calculations. Implementing a dual harmonic numerical treatment as a function of latitude the annual fluxes are decomposed into monthly flux estimates. Using these monthly flux estimates we then use the NASA PCTM to transport the annual and monthly fluxes in the atmosphere. We find that the use of monthly fluxes makes a significant difference in the seasonal cycle of atmospheric CO2 in and near those regions where anthropogenic CO2 is released to the atmosphere. Local variations of 2-6 ppm CO2 in the seasonal cycle amplitude are simulated. We also find that in the mid latitudes near the sources synoptic scale atmospheric circulations are important in the winter and that boundary layer venting and rectifier effects are more important in the summer. These finding have implications for inverse models that attempt to estimate surface source/sink regions especially when the surface sinks are co-located with regions of strong anthropogenic CO2 emissions.
DE: 0322 Constituent sources and sinks
DE: 0414 Biogeochemical cycles, processes, and modeling (0412, 0793, 1615, 4805, 4912)
DE: 0428 Carbon cycling (4806)
DE: 3319 General circulation (1223)
DE: 3337 Global climate models (1626, 4928)
SC: Atmospheric Sciences [A]
MN: 2006 Fall Meeting