Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Arid Land Geography》 2010-05
Add to Favorite Get Latest Update

Precipitation characteristics at the hinterland of Gurbantunggut Desert and the surrounding areas

SUN Dong-xia,YANG Jian-cheng(Meteorological Bureau of Kelamayi,Kelamayi 834000,Xinjiang,China)  
It is always a challenge to study and understand precipitation characteristics in inner desert area due to the uninhabited conditions and the scarcity of observation data.Most relevant work in the literature employed data from weather stations located on the peripheral area of the desert and/or measurements from short-term scientific field explorations to study desert environment and climate change in Xinjiang.A few studies have examined short-term precipitation and clouds characteristics in the inner desert;however,it is not common to encounter studies using long-term meteorological data that were obtained in the inner desert area.This paper is one of the first of using the long-term,continuous measurements collected at the meteorological weather stations in the inner Gurbantunggut Desert between 1996 and 2005 to examine the annual,seasonal and monthly precipitation patterns and possible changes inside the desert with the variation coefficient and relative difference technique.Comparisons with the precipitation data obtained from the surrounding areas of the desert are also conducted.The results show as follows:(1) The annual precipitation in the inner Gurbantunggut Desert is 123.4 mm,about 32% less than the surrounding areas;(2) The annual,seasonal,and monthly distributions of the precipitation inside the desert are rather similar to those of the surrounding areas,with increase trend in summer and decrease trend in winter but no significant changes in the other two seasons.This implies that the total increase trend in precipitation comes primarily from summer increase;(3) The variation coefficients of the annual and seasonal precipitation,vapor pressure and relative humidity in the inner desert are larger than those of the surrounding areas,suggesting larger variability and instability of meteorological conditions inside the desert when compared to the peripheral areas;(4) The monthly precipitation of this decade in inner desert is less than that in surrounding area.In March the precipitation is minimal and the precipitation relative difference is 52.3%.(5) Observation data shows that there is only one day with precipitation more than 25 mm in this decade.The longest period with continuous precipitation is 8 days while the longest period without precipitation is 44 days in the inner desert in this decade.
【Fund】: 克拉玛依市科技局指导性科技计划项目(sk2008-32)资助
【CateGory Index】: P426.613
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved