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The characteristics and parameterization of aerodynamic roughness length over heterogeneous surfaces

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Lu, L., Liu, S.M., Xu, Z.W., Yang, K., Cai, X.H., Jia, L., & Wang, J.M. (2009). The characteristics and parameterization of aerodynamic roughness length over heterogeneous surfaces. Advances in atmospheric sciences, 26(1), 180-190.
Literature information
Type Of Reference JOUR
Title The characteristics and parameterization of aerodynamic roughness length over heterogeneous surfaces
Authors Lu, Li| Liu, Shaomin| Xu, Ziwei| Yang, Kun| Cai, Xuhui| Jia, Li| Wang, Jiemin|
Secondary Title Advances in Atmospheric Sciences
Abstract Aerodynamic roughness length (z 0m) is a key factor in surface flux estimations with remote sensing algorithms and/or land surface models. This paper calculates z 0m over several land surfaces, with 3 years of experimental data from Xiaotangshan. The results show that z 0m is direction-dependent, mainly due to the heterogeneity of the size and spatial distribution of the roughness elements inside the source area along different wind directions. Furthermore, a heuristic parameterization of the aerodynamic roughness length for heterogeneous surfaces is proposed. Individual z 0m over each surface component (patch) is calculated firstly with the characteristic parameters of the roughness elements (vegetation height, leaf area index, etc.), then z 0m over the whole experimental field is aggregated, using the footprint weighting method.
Date 2009/01/01/
Year 2009
DOI 10.1007/s00376-009-0180-3
Database Provider link.springer.com
volume 26
Issue Number 1
Start Page 180
Alternate Title1 Adv. Atmos. Sci.
Language en
Issn 0256-1530, 1861-9533
Url http://link.springer.com/article/10.1007/s00376-009-0180-3
Access Date 2014/01/09/12:51:32
Keywords Aerodynamic roughness length| Footprint| Geophysics/Geodesy| heterogeneous surfaces| Meteorology/Climatology|
file_attachments2 http://link.springer.com/article/10.1007/s00376-009-0180-3
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