Estimates of effective aerodynamic roughness length over mountainous areas of the Tibetan Plateau (EI)

CORC > 寒区旱区环境与工程研究所 > 中科院寒区旱区环境与工程研究所（未分类） > 期刊论文

	Estimates of effective aerodynamic roughness length over mountainous areas of the Tibetan Plateau (EI)
	Han C.; Ma Y.; Su Z.; Chen X.; Zhang L.; Li M.; Sun F.
刊名	Quarterly Journal of the Royal Meteorological Society
	2015
卷号	141 期号:689 页码:1457-1465
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 zinf0m/infsupeff/sup and zero-plane displacement height dinf0/inf are determined using the neutral logarithmic wind profile law. The results show that the values of zinf0m/infsupeff/sup 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 zinf0m/infsupeff/sup and dinf0/inf, 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 zinf0m/infsupeff/sup. 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 dinf0/inf, 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. 2014 Royal Meteorological Society.
收录类别	EI
语种	英语
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/27058]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Han C.,Ma Y.,Su Z.,et al. Estimates of effective aerodynamic roughness length over mountainous areas of the Tibetan Plateau (EI)[J]. Quarterly Journal of the Royal Meteorological Society,2015,141(689):1457-1465.
APA	Han C..,Ma Y..,Su Z..,Chen X..,Zhang L..,...&Sun F..(2015).Estimates of effective aerodynamic roughness length over mountainous areas of the Tibetan Plateau (EI).Quarterly Journal of the Royal Meteorological Society,141(689),1457-1465.
MLA	Han C.,et al."Estimates of effective aerodynamic roughness length over mountainous areas of the Tibetan Plateau (EI)".Quarterly Journal of the Royal Meteorological Society 141.689(2015):1457-1465.