| 热带对流活动与长江中下游和华北地区夏季旱涝的关系 |
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| 引用本文： | 葛旭阳,李砚华,蒋尚城.热带对流活动与长江中下游和华北地区夏季旱涝的关系[J].南京气象学院学报,2000,23(3):391-398. |
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| 作者姓名： | 葛旭阳 李砚华 蒋尚城 |
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| 作者单位： | 1. 上海气候中心,上海,200030
2. 北京大学地球物理系,北京,100871 |
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| 基金项目： | 国家科委重中之重“九五”短期气候预测 !96-90 8-0 5-0 6项目资助 |
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| 摘 要： | 利用ＯＬＰ资料，结合ＮＣＥＰ／ＮＣＡＲ再分析资料，研究了长江中下游、华北地区旱、涝年热带对流活动特征，着重讨论了ＩＴＣＺ位置、季节内低频振荡与两地区旱、涝气候异常的联系，结果发现：１月赤道太平洋上对流活动的异常与夏季两地区旱涝有密切的关系，冬季赤道太平洋对流活动东强西弱（东弱西强），则对应夏季长江中下游地区易偏涝（旱），华北地区锡偏旱（涝）；ＩＴＣＺ的位置异常偏南（北）时，夏季长江中下游地区易偏涝
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| 关 键 词： | 长江中下游 华北地区 旱涝 热带对流 大气环流 |
| 修稿时间： | 1999-11-06 |
RELATIONSHIP BETWEEN TROPICAL CONVECTION AND SUMMER RAINFALL OVER THE MID-LOWER VALLEYS OF THE YANGTZE AND NORTH CHINA |
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| Ge Xuyang,Li Yanhua,Jiang Shangcheng.RELATIONSHIP BETWEEN TROPICAL CONVECTION AND SUMMER RAINFALL OVER THE MID-LOWER VALLEYS OF THE YANGTZE AND NORTH CHINA[J].Journal of Nanjing Institute of Meteorology,2000,23(3):391-398. |
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| Authors: | Ge Xuyang Li Yanhua Jiang Shangcheng |
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| Abstract: | In the content of 1975~1995 OLR data and 1 979~1995 NCEP/NCAR reanalysis data,the features of tropical convective activitie s are discussed in wet/dry summers over the mid-lower valleys of the Yangtze an d north China,with focus on the relationship between the position/LFO of ITCZ an d the flood/drought over the two areas.Results show that: 1)there exits a close relationship between the flood/drought over the study areas in summer and the co nvective activities over the tropical Pacific in the preceding January,with stro ng convection in eastern Pacific and weak in western Pacific corresponding to fl ood in the mid-lower valleys of the Yangtze and drought in north China,and v.v. ;2)when ITCZ lies in the south(north) of its mean position,there will be flood(d rought) over the mid-lower valleys of the Yangtze and drought(flood) over north China;3)there are differences in LFO of OLR between wet/dry summers,which is ma inly characterized by its propagation and intensity.Such a differences may serve as one of the important causes for the difference of summer rainfall between th e two areas. |
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| Keywords: | mid-lower valleys of the Yangtze north Ch ina flood/drought tropical convection LFO |
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