关键词: 塔克拉玛干地区, 气候变化, 地面水汽压, 湿润指数, 平均风速, 相对湿度, 气压

Abstract: Abstract:The reorganize observed data of atmospheric water vapor pressure,average wind speed,air pressure,precipitation,average temperature and relative humidity from 21 meteorological stations during 1961-2000 were used to analyze the annual and seasonal climate change in Taklimakan desert area.The results are as follows:(1) Annual and seasonal average wind speed presented ladder-type descending trend,on which there was a abrupt jump from high to low at 1973.(2) The atmospheric water vapor pressure in summer,autumn,winter and a year fluctuated upward on large scale since 1980s;summer and autumn water vapor pressure respectively had a jump from low to high at 1969 and 1973.The obvious increase of autumn and winter water vapor pressure had not brought about the increasing of precipitation,that is precipitation change can not fully figure out the change of air water content.(3) Humidity index had obvious increasing in summer and unobvious increasing in spring;meantime,precipitation obviously went up in summer and year,unobviously in spring.It showed that the climate change reflected by humidity index did not agree to the change reflected by only precipitation.(4) Relative humidity in summer,autumn and year went up in wave pattern,and the relative humidity of summer and year separately occurred jump from low to high at 1970 and 1974.(5) Annual and seasonal pressure did not change in recent 40 years.

Key words: Taklimakan desert area, climate change, atmospheric water vapor pressure, humidity index, relative humidity, average wind speed, air pressure