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题名: Energy balance in the semiarid area of the Loess Plateau, China
作者: Liang, JN; Zhang, L; Cao, XJ; Wen, J; Wang, JM; Wang, GY
收录类别: SCIE
出版日期: 2017-02-27
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
卷号: 122, 期号:1-4, 页码:2155-2168
出版者: AMER GEOPHYSICAL UNION
出版地: WASHINGTON
英文摘要: To understand the energy balance over the complex terrain of the Loess Plateau, we analyzed data from the Semi-Arid Climate and Environment Observatory of Lanzhou University (SACOL). From 1 June to 15 August 2008, the energy balance closure ratio ranged from 0.52 to 0.90 during the daytime when the available energy was greater than 150 Wm(-2); during nocturnal hours, it was about 0.25. We proposed a method based on water mass conservation to estimate the energy transmitted by the vertical movement of moisture in the soil and set out to explain the imbalance. During the daytime, the heat stored in the soil above the heat flux plate placed at 5 cm below the surface, the energy transmitted by the vertical movement of moisture in the soil, and the energy assimilated by plant photosynthesis contributed to 29.6%, 2.0%, and 1.8% of the energy residual, respectively. During stable conditions, the soil heat storage contributed to 46.4% of the energy residual, whereas the other energy terms contributed little. The instantaneous energy closure ratio was about 0.80 during unstable conditions; it was about 0.40 when the wind speed U was greater than 3.0 ms(-1), while depends systematically on U under condition of U<3.0 m s(-1) during stable conditions. Under the weak wind stable condition, affected by topography-induced nonstationary motions, the turbulence is anisotropic with a strong horizontal fluctuation and a weak vertical fluctuation, resulting in weakened heat mixing in the vertical direction and stronger unclosure of energy.
作者部门: [Liang, Jiening ; Zhang, Lei ; Cao, Xianjie ; Wang, Guoyin] Lanzhou Univ, Coll Atmospher Sci, Key Lab Semi Arid Climate Change, Minist Educ, Lanzhou, Peoples R China ; [Liang, Jiening ; Wen, Jun ; Wang, Jiemin] Chinese Acad Sci, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou, Peoples R China
通讯作者: Zhang, L (reprint author), Lanzhou Univ, Coll Atmospher Sci, Key Lab Semi Arid Climate Change, Minist Educ, Lanzhou, Peoples R China.
学科分类: Meteorology & Atmospheric Sciences
文章类型: Article
所属项目编号: National Natural Science Foundation of China [41475008, 41605005] ; Opening Research Foundation of Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Chinese Academy of Sciences [LPCC201506] ; Fundamental Research Funds for the Central Universities [lzujbky-2016-k06]
所属项目名称: 国家自然科学基金项目 ; 中央高校基本科研业务费专项资金
项目资助者: NSFC ; LZU
语种: 英语
DOI: 10.1002/2015JD024572
ISSN号: 2169-897X
WOS记录号: WOS:000396121200006
IR记录号: WOS:000396121200006
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/189561
Appears in Collections:大气科学学院_期刊论文

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Recommended Citation:
Liang, JN,Zhang, L,Cao, XJ,et al. Energy balance in the semiarid area of the Loess Plateau, China[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(1-4):2155-2168.
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