Evaporation over a heterogeneous land surface

The EVA-GRIPS Project

authored by

Heinz Theo Mengelkamp, F. Beyrich, G. Heinemann, F. Ament, J. Bange, F. Berger, J. Bösenberg, T. Foken, B. Hennemuth, C. Heret, S. Huneke, K. P. Johnsen, M. Kerschgens, W. Kohsiek, J. P. Leps, C. Liebethal, H. Lohse, M. Mauder, W. Meijninger, S. Raasch, C. Simmer, T. Spieß, A. Tittebrand, J. Uhlenbrock, P. Zittel

Abstract

The representation of sudgrid-scale surface heterogeneities in numerical weather and climate models has been a challenging problem for more than a decade. The Evaporation at Grid and Pixel Scale (EVA-GRIPS) project adds to the numerous studies on vegetation-atmosphere interaction processes through a comprehensive field campaign and through simulation studies with land surface schemes and mesoscale models. The mixture of surface types in the test area in eastern Germany is typical for larger parts of northern Central Europe. The spatial scale considered corresponds to the grid scale of a regional atmospheric weather prediction or climate model and to the pixel scale of satellite images. Area-averaged fluxes derived from point measurements, scintillometer measurements, and a helicopter-borne turbulence probe were widely consistent with respect to the sensible heat flux. The latent heat flux from the scintillometer measurements is systematically higher than the eddy covariance data. Fluxes derived from numerical simulations proved the so-called mosaic approach to be an appropriate parameterization for subgrid heterogeneity.

Organisation(s)

Institute of Meteorology and Climatology

External Organisation(s)

Helmholtz Zentrum Geesthacht Centre for Materials and Coastal Research
Deutscher Wetterdienst (DWD)
University of Cologne
University of Bonn
Technische Universität Braunschweig
Technische Universität Dresden
Max Planck Institute for Meteorology (MPI-M)
University of Bayreuth
Royal Netherlands Meteorological Institute
Wageningen University and Research

Type

Article

Journal

Bulletin of the American Meteorological Society

Volume

87

Pages

775-786

No. of pages

12

ISSN

0003-0007

Publication date

06.2006

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Atmospheric Science

Sustainable Development Goals

SDG 13 - Climate Action

Electronic version(s)

https://doi.org/10.1175/BAMS-87-6-775 (Access: Open)