Estimates of effective aerodynamic roughness length over mountainous areas of the Tibetan Plateau (SCI) | |
Han C. B.; Ma Y. M.; Su Z. B.; Chen X. L.; Zhang L.; Li M. S.; Sun F. L. | |
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 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. |
收录类别 | SCI |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.casnw.net/handle/362004/27335] |
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. B.,Ma Y. M.,Su Z. B.,et al. Estimates of effective aerodynamic roughness length over mountainous areas of the Tibetan Plateau (SCI)[J]. Quarterly Journal of the Royal Meteorological Society,2015,141(689):1457-1465. |
APA | Han C. B..,Ma Y. M..,Su Z. B..,Chen X. L..,Zhang L..,...&Sun F. L..(2015).Estimates of effective aerodynamic roughness length over mountainous areas of the Tibetan Plateau (SCI).Quarterly Journal of the Royal Meteorological Society,141(689),1457-1465. |
MLA | Han C. B.,et al."Estimates of effective aerodynamic roughness length over mountainous areas of the Tibetan Plateau (SCI)".Quarterly Journal of the Royal Meteorological Society 141.689(2015):1457-1465. |
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