| 本文已被：浏览 1442次 下载 1903次 |
码上扫一扫！ |
|
|
| 长江流域夏季降水的时空特征及演变趋势分析 |
|
张永领1, 高全洲1, 丁裕国2, 姜彤3
|
|
1.中山大学地理科学与规划学院, 广东, 广州, 510275;2.南京信息工程大学, 江苏, 南京, 210044;3.中科院南京地理与湖泊研究所, 江苏, 南京, 210008
|
|
| 摘要: |
| 利用长江流域107个站1958～2002年逐年夏季降水量资料,对长江流域夏季降水的区域特征及演变规律进行诊断分析。结果表明,长江流域夏季降水主要有3种空间振荡型、7个降水变化敏感区域。其中长江三角洲、鄱阳湖平原、湘江-赣江上游区域夏季降水呈显著的增加趋势,增加率分别为25.8mm/10a、69.4mm/10a、31.0mm/10a,信度水平在95%以上;岷江流域则呈显著的减少趋势,减少率为40.7mm/10a,信度水平在99%以上;岷江流域和汉水-长江三峡在1980年代降水最多,而其它区域在1990年代降水最多。夏季降水量江汉-洞庭湖平原在1985年、鄱阳湖平原在1994年、长江三角洲和汉水-长江三峡在1974年发生了由少到多的突变,而岷江流域则在1963年发生由多到少的突变;各个区域都存在明显的年际或年代际振荡周期。 |
| 关键词: 长江流域 夏季降水 降水变化敏感区 演变趋势 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金(40471120);高等学校博士学科点专项科研基金(20040558025);“985”工程GIS与遥感的地学应用科技创新平台(105203200400006);中国科学院知识创新工程重要项目“长江中下游洪水孕灾环境变化、致灾机理及减灾对策”(KZCX3-SW-331)共同资助 |
|
| ANALYSIS OF TIME-SPATIAL CHARACTERISTICS AND EVOLUTIONAL TRENDS OF SUMMER PRECIPITATION IN THE YANGTZE RIVER CATCHMENT |
|
ZHANG Yong-ling1, GAO Quan-zhou1, DING yu-guo2, JIANG Tong3
|
|
1.School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China;2.Nanjing University of Information Science & Technology, Nanjing 210044, China;3.Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008, China
|
| Abstract: |
| The regional characteristics and variable trends of summer precipitation were diagnosed and analyzed in Yangtze river catchment,based on every summer precipitation data of 107 stations from 1958 to 2002.The result show,there are 3 main spatial oscillation patterns and 7 sensitive centers of precipitation change.The summer precipitation is noted increased above 95% confidential level in the centers of Yangtze Delta,Poyanghu plain and the upper Xiang-Han river area;which increasing rates are 25.8 mm/10a,69.4 mm/10a and 31.0 mm/10a.But the summer precipitation is noted decreased at 99% confidential level in Min river catchment,which decreasing rate is 40.7 mm/10a.The summer precipitation is most in 1980s only in centers of Min river catchment and Hanshui-Yangtze three gorges,but most in 1990s in the other centers.The summer precipitation had declined abrupt change in 1990s in Poyanghu plain,in 1985 in Jianghan-Dongtinghu plain and in 1979 boat in Yangtze Delta and in Hanshui-Yangtzer three gogres,but increased abrupt change in 1963 in Min river catchment.All sensitive centers of precipitation change have obviously interannual and interdecadal oscillation periods. |
| Key words: Yangtze river catchment summer precipitation sensitive center of precipitation change evolutional trend |