Universität zu Köln

Liu, Shaofeng, Shao, Yaping ORCID: 0000-0002-2041-5479, Kunoth, Angela and Simmer, Clemens (2017). Impact of surface-heterogeneity on atmosphere and land-surface interactions. Environ. Modell. Softw., 88. S. 35 - 48. OXFORD: ELSEVIER SCI LTD. ISSN 1873-6726

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Abstract

Land-surface heterogeneity occurs on many scales, but its inclusion remains an unsolved problem in land-surface and atmospheric boundary-layer schemes for weather and climate models. We investigate the propagation of land-surface heterogeneity in a convective boundary layer using an atmosphere and land-surface coupled large-eddy model. Simulations are made for land surfaces of different heterogeneity scales and a uniform land surface. A multi-scale analysis is carried out and it is found that while domain-and-time averaged fluxes and state variables are not sensitive to land-surface heterogeneity, atmospheric patterns are. Close to the surface, atmospheric patterns are dominated by land-surface forced patterns; away from the surface, eigen patterns dominate and forced patterns reemerge for large averaging times. While small-scale land-surface features are more rapidly destroyed by turbulence, large-scale features can persist over hundreds of meters. (C) 2016 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Liu, Shaofeng UNSPECIFIED UNSPECIFIED UNSPECIFIED Shao, Yaping UNSPECIFIED orcid.org/0000-0002-2041-5479 UNSPECIFIED Kunoth, Angela UNSPECIFIED UNSPECIFIED UNSPECIFIED Simmer, Clemens UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-241396
DOI:	10.1016/j.envsoft.2016.11.006
Journal or Publication Title:	Environ. Modell. Softw.
Volume:	88
Page Range:	S. 35 - 48
Date:	2017
Publisher:	ELSEVIER SCI LTD
Place of Publication:	OXFORD
ISSN:	1873-6726
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Geosciences > Institute for Geophysics and Meteorology
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CONVECTIVE BOUNDARY-LAYER; LARGE-EDDY SIMULATION; SCALE; MODELS; VARIABLES; FLUXES Multiple languages Computer Science, Interdisciplinary Applications; Engineering, Environmental; Environmental Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/24139