气候变化领域集成服务门户(CCPortal): Observational study of surface wind regime on the north slope of Mount Qomolangma (Mount Everest)

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DOI	10.1657/AAAR00C-13-132
	Observational study of surface wind regime on the north slope of Mount Qomolangma (Mount Everest)
	Yang, Xingguo; Zhang, Tingjun; Qin, Dahe; Qin, Xiang; Yang, Yang
发表日期	2015
ISSN	1523-0430
起始页码	807
结束页码	817
卷号	47 期号:4
英文摘要	From May 2007 to September 2008, six automatic weather stations (AWS) were installed along the traditional mountaineering line on the north slope of Mount Qomolangma. The elevations of the stations ranged between 5207 and 6560 m above sea level (a.s.l.). Some sounding data were also measured at Base Camp (5207 m a.s.l.) in late April and early May of 2007 and 2008. The spatial arrangement of the stations and temporal duration of the measurements, as well as the sounding data, generated a data set enabling the analysis of the wind regime in this region. The wind directions and speeds show change at different elevations because of the complicated terrain, the glacier-moraine-rock transition underlying surface, and the synoptic-scale wind. The katabatic wind dominates at low-elevation areas in the Rongbuk Valley, and the depth and frequency of it are about 800 m and 59% during the observational period. The up-valley wind always erodes the katabatic wind, and causes the lowest directional constancy in summer. With the elevation ascending, the katabatic wind weakens due to the smaller fetch and temperature contrast, as well as the relatively open landscape of the valley and smaller glacier area. At site 3 (5792 m a.s.l.), the frequency of the katabatic wind is only 25%, whereas the frequency of the up-valley wind is 47%, and especially in winter, the up-valley wind (82%) predominates all day. Moreover, the synoptic-scale wind also plays an important role in the surface wind regime on the north slope of Mount Qomolangma. From November to March, the active westerly troughs always intrude into the bottom of the Rongbuk Valley and could maintain the strong katabatic wind, and the maximum wind speed reaches 43.1 m s(-1) at site 1 (5207 m a.s.l.). At high-elevation areas, the westerlies can penetrates more easily, and dominate the wind regime. The wind speed can reach as high as 57.1 m s(-1) at site 3 in winter.
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography
WOS类目	Environmental Sciences ; Geography, Physical
来源期刊	ARCTIC ANTARCTIC AND ALPINE RESEARCH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158568
作者单位	Zhang, TJ (corresponding author), Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab West Chinas Environm Syst, 222 Tianshui South Rd, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Yang, Xingguo,Zhang, Tingjun,Qin, Dahe,et al. Observational study of surface wind regime on the north slope of Mount Qomolangma (Mount Everest)[J],2015,47(4).
APA	Yang, Xingguo,Zhang, Tingjun,Qin, Dahe,Qin, Xiang,&Yang, Yang.(2015).Observational study of surface wind regime on the north slope of Mount Qomolangma (Mount Everest).ARCTIC ANTARCTIC AND ALPINE RESEARCH,47(4).
MLA	Yang, Xingguo,et al."Observational study of surface wind regime on the north slope of Mount Qomolangma (Mount Everest)".ARCTIC ANTARCTIC AND ALPINE RESEARCH 47.4(2015).