| 全球气候变暖对西北地区秋季降水的影响 |
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| 引用本文： | 张存杰,高学杰,赵红岩. 全球气候变暖对西北地区秋季降水的影响[J]. 冰川冻土, 2003, 25(2): 157-164. DOI: 10.7522/j.issn.1000-0240.2003.0027 |
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| 作者姓名： | 张存杰 高学杰 赵红岩 |
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| 作者单位： | 1. 中国气象局, 兰州干旱气象研究所, 甘肃, 兰州, 730020;2. 中国气象局, 国家气候中心, 北京, 100081;3. 兰州中心气象台, 甘肃, 兰州, 730020 |
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| 基金项目： | 中国科学院知识创新工程项目;KZCX1-10-06; |
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| 摘 要： | 分析了在全球气候变暖背景下,西北地区秋季降水的时空变化特征和主要影响因素,发现秋季降水量的均值突变现象在四季中最为明显,西北地区东部和西部降水在年代际尺度上具有相反的变化趋势.El Nino年秋季,新疆脊偏强,印缅槽偏弱,西北地区东部降水偏少;La Nina年秋季降水形势相反.CO2倍增情况下的数值试验表明,西北地区西部夏季降水增加明显,而秋季不明显;西北地区东部夏季降水呈减少趋势,而秋季降水增加明显.
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| 关 键 词： | 全球变暖 西北地区 秋季降水 |
| 文章编号： | 1000-0240(2003)02-0157-08 |
| 收稿时间： | 2002-10-26 |
| 修稿时间： | 2002-10-26 |
Impact of Global Warming on Autumn Precipitation in Northwest China |
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| ZHANG Cun jie ,GAO Xue jie ,ZHAO Hong yan. Impact of Global Warming on Autumn Precipitation in Northwest China[J]. Journal of Glaciology and Geocryology, 2003, 25(2): 157-164. DOI: 10.7522/j.issn.1000-0240.2003.0027 |
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| Authors: | ZHANG Cun jie GAO Xue jie ZHAO Hong yan |
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| Affiliation: | 1. Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou Gansu 730020, China;2. National Climate Center of China Meteorological Administration, Beijing 100081, China;3. Lanzhou Genter Meteorological Observatory, Lanzhou Gansu 730000, China |
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| Abstract: | On the background of global warming, the spatial and temporal variation characteristics of autumn precipitation were analyzed in Northwest China; major influencing factors were also studied. It was found that the catastrophe of autumn precipitation is more obvious than that in other seasons. The interannual variation of precipitation presents a contrary trend between the East and the West. In the autumn of El Nino years, Xinjiang ridge is intensified, India-Burma trough is weakened, and the east of Northwest China is dry. The case of La Nina years is opposite. Numerical simulation experiment has been carried out with doubling CO 2 using the regional climatic model. The results show that in west of Northwest China, precipitation will increase in summer, but it is not obvious in autumn; in east of Northwest China, the case is opposite, autumn precipitation will increase obviously. |
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| Keywords: | global warming Northwest China autumn precipitation |
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