globalchange  > 气候变化事实与影响
DOI: 10.5194/hess-19-4023-2015
Scopus记录号: 2-s2.0-84942924271
论文题名:
High-resolution modelling of interactions between soil moisture and convective development in a mountain enclosed Tibetan Basin
作者: Gerken T; , Babel W; , Herzog M; , Fuchs K; , Sun F; , Ma Y; , Foken T; , Graf H; -F
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2015
卷: 19, 期:9
起始页码: 4023
结束页码: 4040
语种: 英语
Scopus关键词: Atmospheric thermodynamics ; Boundary layer flow ; Boundary layers ; Energy balance ; Interfacial energy ; Lakes ; Moisture ; Soils ; Surface measurement ; Atmospheric circulation ; Atmospheric model ; Boundary layer clouds ; Hydrological cycles ; Local development ; Permanent wilting points ; Sensible heat flux ; Surface atmosphere interaction ; Soil moisture ; atmospheric circulation ; convection ; energy balance ; hydrological cycle ; hydrological modeling ; lake dynamics ; land surface ; soil moisture ; solar radiation ; surface flux ; turbulent flow ; water vapor ; China ; Nam Co ; Qinghai-Xizang Plateau ; Xizang
英文摘要: The Tibetan Plateau plays a significant role in atmospheric circulation and the Asian monsoon system. Turbulent surface fluxes and the evolution of boundary-layer clouds to deep and moist convection provide a feedback system that modifies the plateau's surface energy balance on scales that are currently unresolved in mesoscale models. This work analyses the land surface's role and specifically the influence of soil moisture on the triggering of convection at a cross section of the Nam Co Lake basin, 150 km north of Lhasa using a cloud-resolving atmospheric model with a fully coupled surface. The modelled turbulent fluxes and development of convection compare reasonably well with the observed weather. The simulations span Bowen ratios of 0.5 to 2.5. It is found that convective development is the strongest at intermediate soil moisture. Dry cases with soils close to the permanent wilting point are moisture limited in convective development, while convection in wet soil moisture cases is limited by cloud cover reducing incoming solar radiation and sensible heat fluxes, which has a strong impact on the surface energy balance. This study also shows that local development of convection is an important mechanism for the upward transport of water vapour, which originates from the lake basin that can then be transported to dryer regions of the plateau. Both processes demonstrate the importance of soil moisture and surface-atmosphere interactions on the energy and hydrological cycles of the Tibetan Plateau. © 2015 Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78417
Appears in Collections:气候变化事实与影响

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作者单位: Department of Micrometeorology, University of Bayreuth, Bayreuth, Germany; Centre for Atmospheric Science, Department of Geography, University of Cambridge, Cambridge, United Kingdom; Cold and Arid Regions Environmental, Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, China; Institute of Tibetan Plateau Research, Chinese Academy of Sciences, CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, China; Membe. of Bayreuth Center of Ecology Environment Research (BayCEER), Bayreuth, Germany; Department of Meteorology, Pennsylvania State University, University ParkPA, United States; Institute of Agricultural Science, ETH Zürich, Zurich, Switzerland

Recommended Citation:
Gerken T,, Babel W,, Herzog M,et al. High-resolution modelling of interactions between soil moisture and convective development in a mountain enclosed Tibetan Basin[J]. Hydrology and Earth System Sciences,2015-01-01,19(9)
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