| 河北夏季降水异常的变化及其与环流和海温异常的可能联系 |
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| 引用本文： | 王宏,余锦华,陆倩,李宗涛,王万筠.河北夏季降水异常的变化及其与环流和海温异常的可能联系[J].南京气象学院学报,2016,8(5):454-463. |
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| 作者姓名： | 王宏 余锦华 陆倩 李宗涛 王万筠 |
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| 作者单位： | 承德市气象局, 承德, 067000;南京信息工程大学 大气科学学院, 南京, 210044;承德市气象局, 承德, 067000;河北省气象局, 石家庄, 050021;天津市滨海新区气象局, 天津, 300457 |
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| 基金项目： | 公益性行业（气象）科研专项（GYHY201006016） |
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| 摘 要： | 利用河北省及周边73个台站1961-2010年夏季降水资料、NCEP／NCAR再分析资料、NOAA太平洋海温资料，应用SVD等多种统计方法探讨了河北夏季降水异常变化及其与环流和同期及前期太平洋海表温度异常（SSTA）的可能联系.研究结果表明：河北省夏季降水异常存在全省一致和东北-西南相反两种模态；夏季欧亚地区500 hPa高度场表现为从西到东的负、正、负、正的遥相关型时，河北降水偏多，最明显的区域主要位于河北省的东部；夏季东北部多雨、其他地区（保定、邢台和衡水）干旱与北太平洋SSTA的PDO正位相、赤道中东太平洋SSTA的El Niño位相具有较好的耦合关系；最大协方差分析（MCA）的诊断显示，前期冬季北太平洋SSTA类似PDO正位相且赤道中东太平洋SSTA出现El Niño型态，对河北省夏季多雨（尤其是东北部地区）的预测具有较好的指示意义.夏季850 hPa上在我国东部地区表现出明显的偏北（南）风距平，不（有）利于南方暖湿水汽向北的输送，是造成河北夏季降水异常少（多）的主要因素.
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| 关 键 词： | 河北夏季降水异常 时空型态 500 hPa高度场 太平洋海温异常 |
| 收稿时间： | 2014/2/21 0:00:00 |
Summer precipitation anomaly in Hebei province and its relationship with thecirculation and the Sea Surface Temperature Anomaly |
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| WANG Hong,YU Jinhu,LU Qian,LI Zongtao and WANG Wanjun.Summer precipitation anomaly in Hebei province and its relationship with thecirculation and the Sea Surface Temperature Anomaly[J].Journal of Nanjing Institute of Meteorology,2016,8(5):454-463. |
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| Authors: | WANG Hong YU Jinhu LU Qian LI Zongtao and WANG Wanjun |
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| Institution: | Chengde Meteorological Bureau, Chengde 067000;School of Atmospheric Science, Nanjing University of Information Science & Technology, Nanjing 210044;Chengde Meteorological Bureau, Chengde 067000;Hebei Meteorological Bureau, Shijiazhuang 050021;Meteorological Service in Binhai New District of Tianjin, Tianjin 300457 |
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| Abstract: | Based on monthly summer precipitation data during 1961-2010 from 73 meteorological stations in Hebei province and its vicinity,as well as the NCEP/NCAR reanalysis data and NOAA sea surface temperature(SST) data over the Pacific Ocean during the same and earlier period,the spatial and temporal variations of summer precipitation anomaly in Hebei province and its possible relationship with the circulation and Sea Surface Temperature over the Pacific Ocean are analyzed by using statistic analysis methods including Singular Value Decomposition(SVD).Results indicate that the uniformly drought/flood is the most common pattern for the spatial distribution of summer rainfall in Hebei,and the second pattern is a seesaw of drought/flood between southwestern and northeastern regions.When the 500 hPa height field in the middle and high latitudes of Eurasian region in summer is distributed as negative,positive,negative and positive teleconnection pattern from west to east,the precipitation of Hebei is above normal with the most sensitive areas in the eastern part of Hebei.The pattern of rainy in northeastern Hebei and drought in other regions(Baoding,Xingtai and Hengshui) has a good coupling relationship with the positive phase of PDO distribution over North Pacific SSTA and the El Niño distribution over the Equatorial Central-eastern Pacific SSTA,which is also revealed by Maximum Covariance Analysis diagnosis.A distinct north/south wind anomaly in the wind field of 850 hPa over eastern area of China is presented in drought/flood summers of Hebei. |
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| Keywords: | precipitation anomaly in summer of Hebei province spatial/temporal patterns 500 hPa height field the sea surface temperature anomaly over the Pacific Ocean |
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