气候变化领域集成服务门户(CCPortal): Estimates of effective aerodynamic roughness length over mountainous areas of the Tibetan Plateau

CCPortal

DOI	10.1002/qj.2462
	Estimates of effective aerodynamic roughness length over mountainous areas of the Tibetan Plateau
	Han, Cunbo; Ma, Yaoming; Su, Zhongbo; Chen, Xuelong; Zhang, Lang; Li, Maoshan; Sun, Fanglin
通讯作者	Han, CB (通讯作者)
发表日期	2015
ISSN	0035-9009
EISSN	1477-870X
起始页码	1457
结束页码	1465
卷号	141 期号:689
英文摘要	Wind profile data were measured by a wind profiler at QOMS (The Qomolangma Station for Atmospheric Environmental Observation and Research, Chinese Academy of Sciences) and, in separate experiments, GPS radiosondes were used at Shiquanhe Station and Litang Station on the Tibetan Plateau (TP). All three stations are located in the most rugged areas of the TP. QOMS is surrounded by the Himalaya, Shiquanhe Station by the Transhimalaya and Litang station is near the Hengduan Mountains. Using observational wind profile data, effective aerodynamic roughness length z(0m)(eff) and zero-plane displacement height d(0) are determined using the neutral logarithmic wind profile law. The results show that the values of z(0m)(eff) derived from the wind profiles can be considerably larger than the small-scale aerodynamic roughness lengths of the land surface around the three stations. Subsequently, several parametrization schemes which use land surface characteristics to estimate z(0m)(eff) and d(0), such as roughness obstacle height and density, were assessed. The result indicates that of all the methods available, that proposed by Grant and Mason, where the drag coefficient D = 0.5, gives the best estimate of z(0m)(eff). The interim European Centre for Medium-range Weather Forecasts (ECMWF) Re-Analysis (ERA-Interim) dataset underestimates effective aerodynamic roughness length in mountainous areas of the TP due to its use of a smaller drag coefficient of D = 0.4. For estimating d(0), the method of Kutzbach performs well when the density of roughness obstacles () is low, whereas the method of Raupach et al. gives a more reliable estimate when is high. Although this analysis has some limitations, it can feasibly account for form drag being exerted by an unresolved topography in the mountainous areas of the TP.
关键词	SURFACE HEAT FLUXES BOUNDARY-LAYER TURBULENT-FLOW HETEROGENEOUS LANDSCAPE REGIONAL ROUGHNESS PARAMETERS MODIS
英文关键词	effective aerodynamic roughness length; form drag; mountainous areas; Tibetan Plateau (TP)
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000356805700037
来源期刊	QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258518
推荐引用方式 GB/T 7714	Han, Cunbo,Ma, Yaoming,Su, Zhongbo,et al. Estimates of effective aerodynamic roughness length over mountainous areas of the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2015,141(689).
APA	Han, Cunbo.,Ma, Yaoming.,Su, Zhongbo.,Chen, Xuelong.,Zhang, Lang.,...&Sun, Fanglin.(2015).Estimates of effective aerodynamic roughness length over mountainous areas of the Tibetan Plateau.QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY,141(689).
MLA	Han, Cunbo,et al."Estimates of effective aerodynamic roughness length over mountainous areas of the Tibetan Plateau".QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY 141.689(2015).