| 孢粉记录揭示的4000 a BP来乌鲁木齐河源区气候环境变化 |
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| 引用本文： | 鞠远江,刘耕年.孢粉记录揭示的4000 a BP来乌鲁木齐河源区气候环境变化[J].冰川冻土,2004,26(2):166-170. |
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| 作者姓名： | 鞠远江 刘耕年 |
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| 作者单位： | 北京大学环境学院, 北京, 100871 |
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| 摘 要： | 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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| 关 键 词： | 乌鲁木齐河源 气候变化 孢粉 4000aBP以来 |
| 文章编号： | 1000-0240(2004)02-0166-05 |
| 收稿时间： | 2003-05-15 |
| 修稿时间： | 2003年5月15日 |
Climate and Environment Changes Inferred from Pollen Records since 4000 a BP in the Headwaters of the Ürüqi River,Tianshan |
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| JU Yuan-jiang,LIU Geng-nian.Climate and Environment Changes Inferred from Pollen Records since 4000 a BP in the Headwaters of the Ürüqi River,Tianshan[J].Journal of Glaciology and Geocryology,2004,26(2):166-170. |
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| Authors: | JU Yuan-jiang LIU Geng-nian |
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| Institution: | College of Environmental Sciences, Peking University, Beijing 100871, China |
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| Abstract: | Based on a synthetic study on a thermokarst section from Glacier NO.1 to meteorological station at the headwaters of the ürümqi River, the characteristics of paleoclimate evolution since 4 000 a BP were reconstructed. Since then, the headwaters has experienced alternations of relative warm-dry and cold-moisture: It was warm-dry during 4 000～3 630 a BP; It was cool-moisture during 3 630～2 270 a BP, with a tendency of drought at the later stage; It appeared to be warm-dry during 2 270～2 100 a BP; during 2 100～1 310 a BP there was a shifting period from warm-dry to warm-moisture; during 1 310 a BP ～1 100 a BP it was warm-dry; During 1 100 a BP to present, it was cold-moisture. It is also discovered that the climate evolution is affected by westerly current as follows: warm and drought together come forth; coldness and moisture appear at the same time. There are some layers in the section implying a warm-moisture climate, indicating powerful East Asia monsoon having gone deep into the headwaters of the river. |
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| Keywords: | headwaters of the rümqi River climate change pollen 4 000 a BP |
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