HR: 09:25h
AN: B41F-06    [Abstracts]
TI: The influence of resolution of meteorology, biogeochemical models and fossil fuel emissions on forward and inverse modelling of CO2 exchange over Europe using the network of tall towers.
AU: * Vermeulen, A
EM: a.vermeulen@ecn.nl
AF: ECN, Westerduinweg 3, Petten, NL-1755 ZG, Netherlands
AU: Verheggen, B
EM: verheggen@ecn.nl
AF: ECN, Westerduinweg 3, Petten, NL-1755 ZG, Netherlands
AU: Pieterse, G
EM: G.Pieterse@phys.uu.nl
AF: IMAU, Princetonplein 5, Utrecht, NL-3584 CC, Netherlands
AU: Haszpra, L
EM: haszpra.l@met.hu
AF: HMS, P.O.Box 39, Budapest, H-1675, Hungary
AB: Tall towers allow us to observe the integrated influence of carbon exchange processes from large areas on the concentrations of CO₂. The signal received shows a large variability at diurnal and synoptic timescales. The question remains how high resolutions and how accurate transport models need to be, in order to discriminate the relevant source terms from the atmospheric signal. We will examine the influence of the resolution of (ECMWF) meteorological fields, antropogenic and biogenic fluxes when going from resolutions of 2° to 0.2° lat-lon, using a simple Lagrangian 2D transport model. Model results will be compared to other Eulerian model results and observations at the CHIOTTO/CarboEurope tall tower network in Europe. Biogenic fluxes taken into account are from the FACEM model (Pieterse et al, 2006). Results show that the relative influence of the different CO₂ exchange processes is very different at each tower and that higher model resolution clearly pays off in better model performance.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0330 Geochemical cycles (1030)
DE: 0428 Carbon cycling (4806)
SC: Biogeosciences [B]
MN: 2007 Fall Meeting