| 引用本文: | 陈家其,施雅风,张强,张增信.从长江上游近500年历史气候看1860、1870年大洪水气候变化背景.湖泊科学,2006,18(5):476-483. DOI:10.18307/2006.0506 |
| CHEN Jiaqi,SHI Yafeng,ZHANG Qiang,ZHANG Zengxin.Climatic background for historical flood of 1860, 1870 during past 500 years in the upper Yangtze River basin. J. Lake Sci.2006,18(5):476-483. DOI:10.18307/2006.0506 |
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| 摘要: |
| 1860、1870年洪水是长江上游两次举世瞩目的出现于我国相对冷期的大洪水.它的出现似乎相悖于“以19世纪冷期与20世纪暖期相比,暖期大洪水出现频率高于冷期”的早期认识.通过对云、贵、川近500年历史气候研究,发现19世纪中后期至20世纪初,长江上游确为西南季风强盛的多雨期.1860,1870大洪水,尽管在百年尺度上,出现在我国小冰期第三个冷期,然而由于东西部差异,洪发当地在年代际尺度上,相对偏暖.因而长江上游于19世纪中叶前后,相对偏暖和强盛的西南气流与大洪水的孕育可能存在一定的联系. |
| 关键词: 长江上游 历史洪水 气候变化 小冰期 |
| DOI：10.18307/2006.0506 |
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| 基金项目:中国科学院知识创新工程重要方向项目(KZCX3-SW-331);中国科学院南京地理与湖泊研究所所长基金(S240025, CXNIGLAS2006-07)联合资助 |
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| Climatic background for historical flood of 1860, 1870 during past 500 years in the upper Yangtze River basin |
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CHEN Jiaqi1, SHI Yafeng1,2, ZHANG Qiang1, ZHANG Zengxin3
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1.Nanjing Institute of Geography and Limnology, C4S, Nanjing 210008, P. R. China;2.Cold & Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 230000, P. R. China;3.Nanjing Forestry Universityy Nanjing 210037, P. R. China
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| Abstract: |
| I860, 1870 floods occurred during the relatively cold periods in the upper Yangtze River basin. This phenomenon is adverse to the idea that “greater occurrence possibility of floods happened to warmer periods after comparison between cold periods of 19th century and warmer periods of 20th century”. Researches on historical climatic changes during past 500 years in Yunnan, Guizhou and Sichuan, during middle and late 19th centmy and early 20th century, the upper Yangtze River basin is dominated by south-west monsoon. On the 100-year scale, 1860, 1870 floods occurred to the third cold periods during the Little Ice Age. As for the temporal and spatial distribution,the west parts of China is in relatively warm periods during the eastern ports of China is in cold periods (the relatively warm periods before the third cold periods).Relatively warmer and stronger south-west monsoon during around 19th century offered the good climatic background for these two flood events. |
| Key words: Upper Yangtze River historical flood climatic changes Little Ice Age |
