气候变化领域集成服务门户(CCPortal): 拉萨河流域高山水热分布观测结果分析

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	拉萨河流域高山水热分布观测结果分析
其他题名	Analysis of the Observation Results of Temperature and Precipitation over an Alpine Mountain, the Lhasa River Basin
	谢健; 刘景时; 杜明远; 康世昌; 汪奎奎
发表日期	2009
ISSN	1007-6301
卷号	28 期号:2 页码:223-230
中文摘要	利用架设在念青唐古拉山南坡9个海拔高度(4300～5500m)的自动气象站一年(2006年8月1日-2007年7月31日)的实测数据,对山坡1.5m高度的气温和季风期(6-9月)降水随海拔梯度和时间的变化进行了分析.表明4300～4950m存在一个逆温带,逆温时间自10月至翌年4月.年逆温频率为11.5%(42天).4300～5500m年平均气温直减率为0.61℃/100m;念青唐古拉山南坡季风期各月最大降水带都在海拔5100m.最大降水高度以下,山坡降水量递增率为4～7mm/100m,最大降水高度以上,降水递减率数值上为降水递增率的1.6～2.3倍.7月和8月降水量占季风期总降水量比例大于6月和9月.降水月内分配山坡上部总体较山坡下部均匀.降水主要发生在4:00-10:00以外的时间段,而大一中雨(3～14mm/h)主要发生在18:00-22:00.山坡强降水段相对集中在4650～5100m海拔高度.
英文摘要	Altitudinal and temporal distribution of surface based air temperatures and monsoon period precipitation were analysed, using an original data set, spanning Aug. 1, 2006 to Jul. 31, 2007, from 9 automated weather stations set up along an altitudinal gradient from 4300 to 5500 m a.s.l, on the southern slope of Nyainqentanglha Mountains, the Lhasa River basin. Surface based inversion was found typically during October to the following April. The annual inversion frequency was 11.5% (i.e. 42 days). The lapse rate of mean annual air temperature was 0.61℃/100m for the elevation interval of 4300～5500 m. Analysis on the precipitation indicated the presence of the maximum precipitation belt (MPB) at about 5100 m a.s.l, with an increasing rate of 4～7mm/100m below the MPB. The precipitation decreased at a rate of 1.6～2.3 times of the increasing rate over the MPB. The precipitation amounts in July and August were larger than those in June and September. The intra-month distributions of precipitation were generally more homogeneous for the upper hillslope than for the lower. The precipitation events generally occurred at any time except for 4:00～10:00, with the heavy rainfall(3～14mm/h) mainly occurring within 18:00～22:00. The larger precipitation events concentrated roughly between 4650 m a.s.1, and 5100 m a.s.l.
关键词	青藏高原山地气候气温直减率水热条件降水梯度
英文关键词	Tibetan Plateau;mountain climate;temperature lapse rate;hydrothermal condition;precipitation gradient
语种	中文
来源期刊	地理科学进展
来源机构	中国科学院西北资源环境生态研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/89689
推荐引用方式 GB/T 7714	谢健,刘景时,杜明远,等. 拉萨河流域高山水热分布观测结果分析[J]. 中国科学院西北资源环境生态研究院,2009,28(2):223-230.
APA	谢健,刘景时,杜明远,康世昌,&汪奎奎.(2009).拉萨河流域高山水热分布观测结果分析.地理科学进展,28(2),223-230.
MLA	谢健,et al."拉萨河流域高山水热分布观测结果分析".地理科学进展 28.2(2009):223-230.