关键词：
乌鲁木齐河流域;气候总变化幅度;年代际特征;气候突变;小波分析法
摘 要：
利用乌鲁木齐河流域及附近5个具有代表性的气象站1959~2008年的气象资料,通过小波分析等方法,探讨多气候带性质的流域气温、降水量的特征。结果表明,整个乌鲁木齐河流域气温呈显著上升趋势,尤其以秋、冬季贡献最大,流域气温年代际总体上表现为70~80年代前呈下降趋势,90年代后呈上升趋势。气温突变最为集中的时期是90年代末;同时降水量也呈增加趋势,90年代后具有较统一的上升趋势阶段,降水量突变最为集中的时期是90年代初。
译 名：
Temporal and Spatial Characteristics of Climate Changes in the Urumqi River Basin of Tianshan Mountain over 50 years
作 者：
LI Yun et al (State Key Laboratory of Cryospheric Sciences,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou,Gansu 730000)
关键词：
Urumqi River Basin;Total magnitude of climate changes;Characteristics of interdecadal variations;Abrupt change of climate;Wavelet analysis
摘 要：
Based on the meteorological data during 1959-2008 from five representative weather stations in the Urumqi River Basin and surrounding areas,the regional characteristics of temperature and precipitation in the basin featuring multi-climatic zones were studied by means of some methods including wavelet analysis.As was shown in the results,the temperature in the whole Urumqi River Basin demonstrated a significant upward trend.The temperature increase particularly in autumn and winter made the greatest contribution to the marked ascent.The interdecadal temperature in the basin showed a tendency to decline before the period during 1970s-1980s while it was on the rise after 1990s on the whole.The most concentrated period of temperature mutations was in the late 1990s.At the same time,the precipitation also showed an escalating trend,which experienced a stage of unanimous upward trend after 1990s.The most concentrated period of precipitation mutations was in the early 1990s.
