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冰川冻土  2004 

孢粉记录揭示的4000aBP来乌鲁木齐河源区气候环境变化

, PP. 166-170

Keywords: 乌鲁木齐河源,气候变化,孢粉,4000aBP以来

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Abstract:

对乌鲁木齐河源大西沟气象站附近热融塌陷剖面的分析,重建了该区4000aBP以来的气候演变序列.结果表明近4000aBP以来乌鲁木齐河源区气候经历了多次干湿变化,即4000~3630aBP为干暖期,3630~2270aBP为凉湿冷湿期,2270~2100aBP为干暖期,2100~1310aBP干暖转化为暖湿期,1310~1100aBP为干暖期,1100aBP至今是凉湿冷湿期.发现本区气候具有典型的西风带影响下的变化特征,遵循暖干同期、冷湿同期的规律;部分层位反映的暖湿气候说明东亚季风强盛时期,可以深入到乌鲁木齐河源地区.

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