塔克拉玛干沙漠周边地区20世纪前半叶夏季气温趋势变化  

Summer temperature trend around Taklimakan Desert reconstructed by the δ^(18)O records of Chongce Ice Core,West Kunlun Mts.

作　　者：韩建康[1] 刘业祥[1] 刘永健[1] 

机构地区：[1]湖南师范大学资源与环境科学学院,湖南长沙410081

出　　处：《干旱区地理》2007年第1期89-93,共5页Arid Land Geography

基　　金：国际合作项目"塔克拉玛干沙漠南缘气候和环境变化的冰芯研究";日本国文部省国际科学研究(编号62041043;63043030);科技专门协力项目资助

摘　　要：气象和地形条件的复杂使利用山地冰川重建既往气候变化的努力变得困难。通过对西昆仑山崇测冰芯记录中近百年稳定氧同位素(δ^(18)O)资料分析研究,发现在冰芯资料与塔克拉玛干周围气象台站夏季气温记录在可比的30～40年间存在着显著的正相关关系。据此重建了塔克拉玛干周边地区上世纪前半叶夏季气温变化趋势。在世纪尺度上该区气温呈波动上升趋势,沙漠90余年中夏季气温上升幅度约为1．2℃。It is difficult, in general, to reconstruct past climatic records for a continental inland region relying mainly on the ice core data from the high mountainous glaciers due to the processes that terribly complicated by the δ^18O data from the Chongce the meteorological log provided by the local stations around 1 000 Ice Cap at an altitude over 6 000 m a. s. 1. , and m a. s. 1. surrounding Taklimakan Desert have shown a good correlation, basically in summer temperature, for a compatible period, three to four decades from 1992 back to 1950s. It suggests a close relationship between these two records. Upon a deep analysis on the associating mechanism, this paper tried to establish a formula to extrapolate the temperature sequences to an earlier stage for the desert region depending on the longer δ^18O data as covered by the ice core. On a whole, temperature around Taklimakan Desert was rising in the century scale, and the warming trend is about 1.2 ℃ for the data covered 90 years.

关 键 词：崇测冰芯 稳定氧同位素 塔克拉玛干沙漠 夏季气温 

分 类 号：P532[天文地球—古生物学与地层学]