A Test of Sensitivity to Convective Transport in a Global Atmospheric CO2 Simulation
作者： H. Bian , S. R. Kawa , M. Chin , S. Pawson , Z. Zhu
DOI: 10.1111/J.1600-0889.2006.00212.X
关键词:
摘要: Two approximations to convective transport have been implemented in an offline chemistry model (CTM) explore the impact on calculated atmospheric CO 2 distributions. Global year 2000 is simulated using CTM driven by assimilated meteorological fields from NASA's Goddard Earth Observation System Data Assimilation System, Version 4 (GEOS-4). The simulates adopting same emission inventory and dynamical modules as described Kawa et al. (convective scheme denoted Conv1). Conv1 approximates bulk mass fluxes redistribute trace gases. alternate approximation, Conv2, partitions into updraft downdraft, well entrainment detrainment, has potential yield a more realistic simulation of vertical redistribution through deep convection. Replacing Conv2 results overestimate over biospheric sink regions. largest discrepancies result difference about 7.8 ppm July NH boreal forest, which 30% seasonality for that area. These differences are compared those produced scenario variations constrained framework Intergovernmental Panel Climate Change (IPCC) account possible land use change residual terrestrial sink. It shown overestimated can be offset introducing these supplemental emissions. DOI: 10.1111/j.1600-0889.2006.00212.x
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