| 中国东部地区夏季降水和环流的年代际转型及其与PDO的联系 |
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| 引用本文： | 程乘,朱益民,丁黄兴,于斌,马孝通.中国东部地区夏季降水和环流的年代际转型及其与PDO的联系[J].气象科学,2017,37(4):450-457. |
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| 作者姓名： | 程乘 朱益民 丁黄兴 于斌 马孝通 |
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| 作者单位： | 解放军 95178部队, 南宁 530226;国防科技大学 气象海洋学院, 南京 211101,国防科技大学 气象海洋学院, 南京 211101,解放军 95871部队, 湖南 衡阳 421002,解放军 95178部队, 南宁 530226,解放军 95178部队, 南宁 530226 |
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| 基金项目： | 公益性行业（气象）科研专项（GYHY201106017）；国家自然科学基金（41330420） |
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| 摘 要： | 利用1951—2013年全国160个测站逐月降水资料、NCEP/NCAR月平均再分析资料和NOAA全球月平均海表温度等资料,分析了中国东部地区夏季降水的年代际转型及相关大气环流变化。研究结果表明,1970s中后期和1990s PDO两次位相转换给中国东部地区夏季降水带来显著的年代际变化,前者使得东亚夏季风进一步减弱,夏季雨带南退至长江中下游地区,后者使得东亚夏季风恢复增强,雨带北移至淮河流域。进一步研究发现,1990s PDO年代际突变导致东亚夏季大气环流场发生显著变化,贝加尔湖地区增暖导致向北的经向温度梯度增大以及副热带高压的东退北抬是导致1990s东部地区夏季降水年代际变化的可能原因。
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| 关 键 词： | 夏季降水 年代际气候转型 1990s后期 |
| 收稿时间： | 2016/1/24 0:00:00 |
| 修稿时间： | 2016/3/29 0:00:00 |
The interdecadal shift of summer precipitation and atmospheric circulation over East China and its relationship with PDO |
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| CHENG Cheng,ZHU Yimin,DING Huangxing,YU Bin and MA Xiaotong.The interdecadal shift of summer precipitation and atmospheric circulation over East China and its relationship with PDO[J].Scientia Meteorologica Sinica,2017,37(4):450-457. |
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| Authors: | CHENG Cheng ZHU Yimin DING Huangxing YU Bin and MA Xiaotong |
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| Institution: | Unit 95178 of PLA, Nanning 530226, China;School of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, China,School of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, China,Unit 95871 of PLA, Hunan Hengyang 421002, China,Unit 95178 of PLA, Nanning 530226, China and Unit 95178 of PLA, Nanning 530226, China |
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| Abstract: | By using the monthly precipitation data from 160 observational stations of China during 1951-2013, the monthly mean NCEP/NCAR reanalysis data and global monthly mean Sea Surface Temperature (SST) data from NOAA, the interdecadal shift and related atmospheric circulation variation of summer precipitation over eastern China were investigated. Results show that the Pacific Decadal Oscillation (PDO) had two interdecadal shifts in the mid and late 1970s and the late 1990s. The former one caused the further weakening of East Asia Summer Monsoon (EASM) and the southwarding moving to the middle and lower reaches of Yangtze Rive of summer rain belt. On the contrary, the latter one led to the recovery of EASM, so that the summer rain belt can be moved northward to the reaches of Huai River. The further study finds that the atmospheric circulation of East Asia has changed dramatically after the PDO shift in the late 1990s, moreover, the warming over Lake Baikal and the eastward and northward moving of West Pacific Subtropical High (WPSH) are the possible causes for the interdecadal precipitation change. |
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| Keywords: | Summer precipitation Interdecadal climate shift The late 1990s |
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