DOI: 10.1029/2018JD028704
Scopus记录号: 2-s2.0-85051695259
论文题名: An Improved Soil Moisture Parametrization for Regional Climate Simulations in Europe
作者: Breil M. ; Schädler G. ; Laube N.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 14 起始页码: 7331
结束页码: 7339
语种: 英语
英文摘要: A new depth-dependent saturated soil hydraulic conductivity function is implemented in the Regional Climate Model COSMO-CLM coupled to the Land Surface Model VEG3D (CCLM-VEG3D), to improve the physical description of soils in regional climate simulations for the Coordinated Regional Climate Downscaling Experiment-European Domain. This new function is characterized by conductivity values decreasing exponentially with depth, accounting for the reduced pore volume in deeper soil layers. As a result, the new function reduces the soil water amount in the upper soil layers. Thus, less water is available for evapotranspiration and the latent heat fluxes are reduced. In turn, soil heating and the sensible heat fluxes are increased, leading to higher near-surface temperatures in summer. Because of that, an observed cold bias in CCLM-VEG3D simulations with a depth-constant saturated soil hydraulic conductivity function is reduced over large parts of Europe. However, the decreased evapotranspiration results in a reduced cloud cover, which enhances the upward longwave net radiation and the cold bias in winter is getting stronger. But a comparison with observations shows that the new function effectively reduces the mean annual cold bias over almost all of Europe systematically, since the soil moisture-temperature coupling is strongest in summer. This approach is potentially also an improvement for other Land Surface Models. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113498
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany
Recommended Citation:
Breil M.,Schädler G.,Laube N.. An Improved Soil Moisture Parametrization for Regional Climate Simulations in Europe[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(14)