HR: 0800h
AN: B41B-0202    [Abstracts]
TI: Advances in CBL Budgetting and Inverse Modelling by Applying an Off-the-shelf Mesoscale Model
AU: van der molen, M K
EM: michiel.van.der.molen@falw.vu.nl
AF: Department of Hydrology and Geo-Environmental Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1085, Amsterdam, NH 1081HV Netherlands
AU: * Dolman, H
EM: han.dolman@falw.vu.nl
AF: Department of Hydrology and Geo-Environmental Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1085, Amsterdam, NH 1081HV Netherlands
AU: Ronda, R J
EM: ronda@knmi.nl
AF: Royal Netherlands Meteorological Institute, Postbus 201, De Bilt, UT 3730AE Netherlands
AB: Eddy flux towers measure carbon sinks/sources at a local scale (~0.1 km), with the CBL budget method fluxes may be determined at a landscape scale (~1 km), and inverse models may determine the source/sink distribution at a global/continental scale (~1000-10000 km). Although currently efforts are made to increase the resolution of inverse models to the regional scale (~100 km), the meso-scale (100-1000 km) is rather badly represented in this spectrum of approaches. Boundary layer profiles contain signatures of mesoscale processes, such as the effect of wind divergence, topography and forest breezes on the boundary layer height and the subsidence velocity. 3-D advection of resulting concentration gradients is one of the main reasons of failure of the CBL budget approach and the representation error in inverse models and may be addressed in mesoscale atmospheric models. This study shows that considerable improvement may be obtained in the interpretation of boundary layer profiles by running an off-the-shelf mesoscale model without detailed prior knowlegde of the surface flux distribution. The simulations were carried out in the region around Zotino, Central Siberia to aid the interpretation of profile observations collected as part of TCOS-Siberia.
UR: http://www.geo.vu.nl/~moli
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0428 Carbon cycling (4806)
DE: 0466 Modeling
DE: 0475 Permafrost, cryosphere, and high-latitude processes (0702, 0716)
SC: Biogeosciences [B]
MN: Fall Meeting 2005