HR: 1340h
AN: B23A-0951    [Abstracts]
TI: Assimilating carbon flux data to a soil carbon model to estimate pool sizes and their associated turnover time
AU: * LIU, Q
EM: liuq1@ornl.gov
AF: Oak Ridge National Lab ESD, PO BOX 2008 Buidling 1509, Oak Ridge, TN 37831-6335 United States
AU: Gu, L
EM: lianghong-gu@ornl.gov
AF: Oak Ridge National Lab ESD, PO BOX 2008 Buidling 1509, Oak Ridge, TN 37831-6335 United States
AU: Lenhart, S
EM: lenhart@math.utk.edu
AF: University of Tennessee Department of Mathematics, University of Tennessee Department of Mathematics, Knoxville, TN 37990 United States
AU: Post, W M
EM: postwmiii@ornl.gov
AF: Oak Ridge National Lab ESD, PO BOX 2008 Buidling 1509, Oak Ridge, TN 37831-6335 United States
AB: Soil heterotrophic respiration depends not only on temperature but also on the dynamic properties of soil organic carbon (SOC). In modeling study, it is necessary to separate the SOC into multiple pools according to their turnover time. The pool sizes and their turnover time can only be determined indirectly. In this study, we show how the assimilation of carbon flux data into a soil carbon model can be used to obtain the needed information. An adjoint system is applied to minimize the difference between the flux data and the model simulation. It also provides the sensitivity of the model to each control variable.
DE: 4805 Biogeochemical cycles (1615)
DE: 1615 Biogeochemical processes (4805)
DE: 0400 Biogeosciences
SC: Biogeosciences [B]
MN: 2004 AGU Fall Meeting