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Heat and moisture budgets from airborne measurements and high-resolution model simulations

Zacharias, S., Reyers, M., Pinto, J. G., Schween, J. H., Crewell, S. and Kerschgens, M. (2012) Heat and moisture budgets from airborne measurements and high-resolution model simulations. Meteorology and Atmospheric Physics, 117 (1-2). pp. 47-61. ISSN 1436-5065

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To link to this article DOI: 10.1007/s00703-012-0188-6

Abstract/Summary

High-resolution simulations with a mesoscale model are performed to estimate heat and moisture budgets of a well-mixed boundary layer. The model budgets are validated against energy budgets obtained from airborne measurements over heterogeneous terrain in Western Germany. Time rate of change, vertical divergence, and horizontal advection for an atmospheric column of air are estimated. Results show that the time trend of specific humidity exhibits some deficiencies, while the potential temperature trend is matched accurately. Furthermore, the simulated turbulent surface fluxes of sensible and latent heat are comparable to the measured fluxes, leading to similar values of the vertical divergence. The analysis of different horizontal model resolutions exhibits improved surface fluxes with increased resolution, a fact attributed to a reduced aggregation effect. Scale-interaction effects could be identified: while time trends and advection are strongly influenced by mesoscale forcing, the turbulent surface fluxes are mainly controlled by microscale processes.

Item Type:Article
Refereed:Yes
Divisions:No Reading authors. Back catalogue items
Faculty of Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:32742
Publisher:Springer Verlag

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