| 长江源沱沱河区45a来的气候变化特征 |
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| 引用本文： | 张国胜,时兴合,李栋梁,汪青春,戴升.长江源沱沱河区45a来的气候变化特征[J].冰川冻土,2006,28(5):678-685. |
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| 作者姓名： | 张国胜 时兴合 李栋梁 汪青春 戴升 |
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| 作者单位： | 1. 青海省气象局, 青海, 西宁, 810001;2. 中国气象局, 气候研究开放实验室, 北京, 100081;3. 青海省气象台, 青海, 西宁, 810001;4. 中国科学院, 寒区旱区环境与工程研究所, 甘肃, 兰州, 730000 |
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| 基金项目： | 国家自然科学基金项目(40465002)，中国科学院知识创新工程重大项目(KZCX1-SW-04)，中国气象局气候变化专项(CCSF2005-2-QH23)资助 |
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| 摘 要： | 利用1959—2003年长江源区沱沱河气象站气温、降水、积雪等地面观测资料,对年代际的气候变化特征及其影响进行了分析.结果表明:该区域45 a来夏季增温比较明显.20世纪90年代四季平均气温、平均最高和平均最低气温比最冷的80(或60)年代偏高0.6~1.2℃;降水量(含积雪量)冬季呈增加的趋势,夏季呈减少的趋势,秋、春季降水量增加而积雪量减少;年大风日数80—90年代较60—70年代偏多.80年代是夏季温度升高、降水减少、大风日数增多的暖干气候背景,90年代以来继续加剧,并逐步扩展到春、秋季节,使得该区域的草场退化、冰川和冻土消融加快、湿地资源减少、生态环境恶化.
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| 关 键 词： | 长江源区 气候变化 沱沱河地区 |
| 文章编号： | 1000-0240(2006)05-0678-08 |
| 收稿时间： | 2006-01-11 |
| 修稿时间： | 2006年1月11日 |
Climate Change in Tuotuohe Area at the Headwaters of Yangtze River |
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| ZHANG Gou-sheng,SHI Xing-he,LI Dong-liang,WANG Qing-chun,DAI Sheng.Climate Change in Tuotuohe Area at the Headwaters of Yangtze River[J].Journal of Glaciology and Geocryology,2006,28(5):678-685. |
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| Authors: | ZHANG Gou-sheng SHI Xing-he LI Dong-liang WANG Qing-chun DAI Sheng |
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| Institution: | 1. The Meteorological Bureau of Qinghai Province, Xining Qinghai 810001, China;2. Key Laboratory for Climate Studyies, China Meteorological Administration, Beijing 100081, China;3. The Meteorological Station of Qinghai Province, Xining Qinghai 810001, China;4. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China |
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| Abstract: | Using the data of temperature,precipitation,snow cover and so on from the Tuotuohe Meteorological Station at the headwaters of Yangtze River from 1959 to 2003,the annual and seasonal series of meteorological factors are worked out.The interannual and decadal climate changing features are analyzed preliminarily by using the climate diagnosis method.It is found that in the recent 40 years,summer air temperature increased obviously in the region.The annual maximum,minimum and seasonal mean air temperatures in the 1990s were 0.6～1.2℃ higher than that in the 1980s(or the 1960s).In the 1980s the air temperature was the lowest. Precipitation has an increasing trend in winter and a decreasing trend in summer.precipitation in spring and autumn increased but snow depth decreased.Strong wind days were more in the 1980s and the 1990s than that in the 1960s and the 1970s.In general,summer temperature increase,precipitation decrease,and strong wind days increase in the 1980s.This climate changes were strengthened in the 1990s,and expanded to spring and autumn,as a result,grassland deteriorating,permafrost thawing and glacier retreating quickly,wetland shrinking,and finally,eco-environment worsening. |
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| Keywords: | headwaters of the Yangtze River climate change Tuotuohe area |
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