globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2015JD023863
论文题名:
Observation and simulation of lake-air heat and water transfer processes in a high-altitude shallow lake on the Tibetan Plateau
作者: Wang B.; Ma Y.; Chen X.; Ma W.; Su Z.; Menenti M.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2015
卷: 120, 期:24
起始页码: 12327
结束页码: 12344
语种: 英语
英文摘要: Lakes are an important part of the landscape on the Tibetan Plateau. Most of the Plateau lakes' area has been expanding in recent years, but lake-atmosphere energy and water interaction is poorly understood because of a lack of observational data and adequate modeling systems. Based on the eddy covariance observation over a high-altitude shallow and small lake (the small Nam Co Lake) during an ice-free period from 10 April to 30 August 2012, this study analyzes the lake-air heat and water vapor turbulent transfer processes and evaluates two popular lake-air exchange models: a bulk aerodynamic transfer model (B model) and a multilayer model (M model). Our main results are as follows: (1) observations show that the bulk transfer coefficient (CE) and roughness length (zoq) for water are higher than those for heat (CH and z0h), especially under low wind speed; (2) both models underestimate turbulent fluxes due to inaccurate values of the Charnock coefficient (α) and the roughness Reynolds number (Rr) which are both important parameters for calculating the roughness length for momentum (z0m) over water; (3) α within a reasonable range of 0.013-0.035 for rough flow and Rr for smooth flow (Rr = 0.11) are 0.031 and 0.54, respectively, by our observation. The wave pattern of shorter wavelength gives a larger z0m in the small and shallow lake; and (4) the B model and the M model gave consistent results, and both models are more suitable for simulation of turbulent flux exchange after z0m optimization. © 2015. American Geophysical Union. All Rights Reserved.
资助项目: 41205012 ; 91337212 ; XDB03030201 ; 41175008 ; 41275010 ; 41275028
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62968
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; Faculty of Geo-Information Science and Earth Observation, University of Twente, Enschede, Netherlands; Faculty of Civil Engineering and Earth Sciences, Delft University of Technology, Delft, Netherlands

Recommended Citation:
Wang B.,Ma Y.,Chen X.,et al. Observation and simulation of lake-air heat and water transfer processes in a high-altitude shallow lake on the Tibetan Plateau[J]. Journal of Geophysical Research: Atmospheres,2015-01-01,120(24)
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