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| 东亚季风环流演变的主要模态及其与中国东部降水异常的联系 | |
| 引用本文： | 郝立生,丁一汇,闵锦忠.东亚季风环流演变的主要模态及其与中国东部降水异常的联系[J].高原气象,2012,31(4):1007-1018. |
| 作者姓名： | 郝立生 丁一汇 闵锦忠 |
| 作者单位： | 1. 河北省气候中心,河北石家庄050021 南京信息工程大学大气科学学院,江苏南京210044 2. 国家气候中心,北京,100081 3. 南京信息工程大学大气科学学院,江苏南京,210044 |
| 基金项目： | 中国气象局气候变化专项“华北区域气候变化影响评估”资助 |
| 摘 要： | 利用美国国家环境预报中心和国家大气研究中心(NCEP/NCAR)再分析环流资料、美国国家海洋和大气管理局(NOAA)重构的海温资料和中国国家气象信息中心(NMIC)整理的752个测站降水资料,对东亚地区季风环流季节演变主要模态及其与中国东部降水异常的关系进行了分析。结果表明,东亚地区850hPa季风环流季节演变存在两个主要模态,第一模态主要受热带印度洋海温和赤道东太平洋海温偏低背景下印度洋偶极(IOD)演变过程控制;第二模态主要受赤道东太平洋ENSO循环和IOD演变控制。对应第一模态,夏季华北多雨,长江流域少雨;对应第二模态,夏季华北、长江流域多雨,淮河、华南少雨。近50年两模态发生了明显改变,与降水变化有很好的对应关系。 |
| 关 键 词： | 东亚季风 季节演变 主要模态 降水异常 |
Main Modes in East Asian Monsoon Circulation Evolution and Its Relationship with Precipitation Anomaly in Eastern China |
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| HAO Li-Sheng,-,DING Yi-hui,MIN Jin-zhong.Main Modes in East Asian Monsoon Circulation Evolution and Its Relationship with Precipitation Anomaly in Eastern China[J].Plateau Meteorology,2012,31(4):1007-1018. | |
| Authors: | HAO Li-Sheng - DING Yi-hui MIN Jin-zhong |
| Institution: | 1.Hebei Climate Center,Shijiazhuang 050021,China; 2.School of Atmospheric Science,Nanjing University of Informatiom & Science Technology,Nanjing 210044,China; 3.National Climate Center,Beijing 100081,China) |
| Abstract: | Based on the reanalysis circulation data from American National Centers for Environment Prediction/National Center for Atmospheric Research(NCEP/NCAR),the surface sea temperature(SST) data reconstructed by American National Oceanic and Atmospheric Administration(NOAA) and precipitation data at 752 stations from Chian National Meteorogical Information Center(NMIC),the seasonal evolution of main modes in East Asian monsoon and their relationship with the precipitation anomaly in eastern China are analyzed.The results show that there are two main modes in the East Asia monsoon seasonal evolution on 850 hPa.The first mode is mainly affected by Indian Ocean Dipole(IOD) evolution control under the low SST in tropical Indian Ocean and the equatorial eastern Pacific;the second mode is mainly affected by the equatorial eastern Pacific El Nio/Southern Oscillation(ENSO) cycle and IOD evolution control.Corresponding to the first mode,there is rainy in North China in summer,dry in the Yangtze River.Corresponding to the second mode,there is more rain in North China and the Yangtze River in summer,drier than usual in the Huaihe River and South China.The two modes have taken place significant change in recent 50 years,being a good relationship with the precipitation anomaly. |
| Keywords: | East Asian monsoo Seasonal evolution Main mode Precipitation anomaly |
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