| 黄土高原汛期降水年代际演变 |
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| 引用本文： | 王毅荣,张旭东,冯建英.黄土高原汛期降水年代际演变[J].水土保持通报,2007,27(6):67-119. |
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| 作者姓名： | 王毅荣 张旭东 冯建英 |
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| 作者单位： | 1. 中国气象局,兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,中国气象局,干旱气候变化与减灾重点开放实验室,甘肃,兰州,730020;兰州区域气候中心,甘肃,兰州,730020
2. 兰州区域气候中心,甘肃,兰州,730020 |
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| 基金项目： | 国家自然科学基金;科技部社会公益研究项目 |
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| 摘 要： | 利用黄土高原区域40a的降水资料，研究汛期降水年代际演变。结果表明，黄土高原汛期旱涝交错的变化幅度不断减小；降水带南移雨量带南移。20世纪80年代较60年代南移0.6个纬度，90年代南移约1．8个纬度（高原东部地区南移4个纬度）。前3个模态演变的转折（突变）时间和显著程度不同，但其振荡强度和周期的阶段性与降水对应较好。多雨期降水变幅大，周期短，振荡强。少雨期对应多周期，弱振荡。降水异常的敏感区年代际变动明显，演化路径基本由东北向西南移动，高原西部旱涝灾害趋向频繁。
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| 关 键 词： | 黄土高原 汛期 降水 区域响应 |
| 文章编号： | 1000-288X（2007）06-0067-04 |
| 收稿时间： | 2006-08-20 |
| 修稿时间： | 2007-10-21 |
Decennial Evolvement of Abnormal Rainfall During Flood Season over the Loess Plateau |
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| WANG Yi-rong,ZHANG Xu-dong and FENG Jian-ying.Decennial Evolvement of Abnormal Rainfall During Flood Season over the Loess Plateau[J].Bulletin of Soil and Water Conservation,2007,27(6):67-119. |
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| Authors: | WANG Yi-rong ZHANG Xu-dong and FENG Jian-ying |
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| Institution: | Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province and China Meteorolosical Administrtion,Lanzhou Institute of Arid Meteorology,China Meteorological Administration,Lanzhou,Gansu 730020,China;Lanzhou Regional Climate Center,Lanzhou,Gansu 730020,China;Lanzhou Regional Climate Center,Lanzhou,Gansu 730020,China;Lanzhou Regional Climate Center,Lanzhou,Gansu 730020,China |
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| Abstract: | The decennial evolvement of abnormal rainfall in flood season over the Loess Plateau of China were studied using the rainfall data of the recent 40 years. Results showed that the range of abnormal rainfall decreased in flood season. The rainfall belt significantly shifted to the south with 1.8 lat. degrees from 1960s to 1990s and 0.6 lat. degrees from 1960s to 1980s. Each of the first 3 models of rainfall had different change points and periods, but multiple periods and weak surges corresponded with rainy time, being contrary to the time of rain shortage. The region sensitive to abnormal rainfall flowed from northeast to southwest. The west part of the Loess Plateau tended to be arid. |
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| Keywords: | Loess Plateau flood season rainfall regional response |
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