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学科主题: 地理学::自然地理学
题名: Analysis of land surface parameters and turbulence characteristics over the Tibetan Plateau and surrounding region
作者: Wang, YJ (Wang, Yinjun)1; Xu, XD (Xu, Xiangde)1; Liu, HZ (Liu, Huizhi)2; Li, YQ (Li, Yueqing)3; Li, YH (Li, Yaohui)4; Hu, ZY (Hu, Zeyong)5; Gao, XQ (Gao, Xiaoqing)5; Ma, YM (Ma, Yaoming)6; Sun, JH (Sun, Jihua)7; Lenschow, DH (Lenschow, Donald H.)8; Zhong, SY (Zhong, Shiyuan)9; Zhou, MY (Zhou, Mingyu)10, 11; Bian, XD (Bian, Xindi)12; Zhao, P (Zhao, Ping)1
通讯作者: Wang, YJ
关键词: SENSIBLE HEAT-FLUX ; WATER-VAPOR ; SEMIARID AREA ; LAYER ; TERRAIN ; MOMENTUM ; ALBEDO ; TOWER ; CHINA
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
发表日期: 2016
DOI: 10.1002/2016JD025401
卷: 121, 期:16, 页:9540-9560
收录类别: SCI
合作性质: 国际
文章类型: Article
部门归属: 环境
英文摘要: Based on the results from 11 flux sites during the third Tibetan Plateau (TP) Experiment (TIPEX III), land surface parameters and the turbulence characteristics of the atmospheric surface layer over the TP and surrounding region are analyzed. Monin-Obukhov similarity theory has been used to calculate the aerodynamic roughness length z(0m) and the excess resistance to heat transfer kB(-1) = ln(z(0m)/z(0h)), and the factors that cause variations of z(0m) and kB(-1) are investigated. The main drivers for the diurnal variations of surface albedo (alpha) at different sites are solar elevation, solar radiation, and soil moisture. The eddy correlation method is utilized to inversely calculate bulk transfer coefficients for momentum (C-D) and heat (C-H) at different sites. The relationships between C-D and C-H and the wind speed at 10m follow a power law for unstable stratification. For stable stratification, both C-D and C-H increase with increasing wind speed when wind speed is less than 5 m/s. Diurnal variations of turbulent fluxes are compared at different sites, and the relationships between turbulent fluxes and other variables are analyzed. Wind speed variance normalized by the friction velocity (sigma(u)/u*, sigma(v)/u*, sigma(w)/u*) for neutral stratification (C-u1, C-v1, C-w1), and temperature and humidity variance normalized by a temperature and humidity scale (sigma(T)/T*, sigma(q)/q*) under free convection (z/L< -0.1) (C-T, C-q) are fitted with similarity relations. The differences in similarity constants (C-u1, C-v1, C-w1, C-T, C-q) at different sites are discussed. For stable stratification, cases are divided into weakly stable conditions and intermittent turbulence, and the critical values for these two states are determined. Shear and buoyancy terms in the turbulence kinetic energy equation for different stratifications are analyzed.
语种: 英语
WOS记录号: WOS:000386207200016
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7624
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Meteorol Sci, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Atmospher Phys, LAPC, Beijing, Peoples R China
3.China Meteorol Adm, Inst Plateau Meteorol, Chengdu, Peoples R China
4.China Meteorol Adm, Inst Arid Meteorol, Key Lab Arid Climat Change & Reducing Deserter Ga, Lanzhou, Peoples R China
5.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou, Peoples R China
6.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China
7.Meteorol Inst Yunnan Prov, Kunming, Peoples R China
8.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA
9.Michigan State Univ, E Lansing, MI 48824 USA
10.Natl Marine Environm Forecasting Ctr, Beijing, Peoples R China
11.China Meteorol Adm, Natl Climate Ctr, Beijing, Peoples R China
12.US Forest Serv, Northern Res Stn, USDA, E Lansing, MI USA

Recommended Citation:
Wang, YJ ,Xu, XD ,Liu, HZ ,et al. Analysis of land surface parameters and turbulence characteristics over the Tibetan Plateau and surrounding region[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2016,121(16):9540-9560.
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