| 东北春季极端低温的变化特征及其与大西洋海温的关系 |
| |
| 引用本文： | 张霏燕,徐海明.东北春季极端低温的变化特征及其与大西洋海温的关系[J].南京气象学院学报,2011,34(5):574-582. |
| |
| 作者姓名： | 张霏燕 徐海明 |
| |
| 作者单位： | 南京信息工程大学气象灾害省部共建教育部重点实验室,江苏南京,210044 |
| |
| 基金项目： | 国家科技支撑计划课题(2007BAC29B02); 国家自然科学基金资助项目(40975024) |
| |
| 摘 要： | 利用1958—2007年全球海温、位势高度场月平均资料和我国东北地区64个测站的春季地面气温资料,分析了我国东北地区春季极端低温的时空变化特征及其与大气环流和海温异常的关系。结果表明：近50a来,我国东北春季极端低温事件频数整体呈减少趋势;极端低温频数主要存在全区一致变化型和南北反相变化型两种模态;极端低温事件频数与北极涛动存在显著负相关关系,同时在极端低温多年,极涡较弱,乌拉尔山阻塞高压偏强,东北冷涡较强,反之亦然;影响我国东北地区春季极端低温的关键海区为中北大西洋海区,极端低温多年,中北大西洋海温较常年偏冷,反之则中北大西洋海温较常年偏暖。这对于预测东北春季极端低温事件的年际变化具有很好的指示意义。数值试验结果表明,中北大西洋海温异常可激发欧亚波列,致使中国东北温度异常。
|
| 关 键 词： | 春季极端低温 年际变化 海温异常 东北冷涡 |
Spatial/temporal variations of spring extreme low temperature in Northeast China and its relationship with SSTA in Atlantic Ocean |
| |
| ZHANG Fei-yan,XU Hai-ming.Spatial/temporal variations of spring extreme low temperature in Northeast China and its relationship with SSTA in Atlantic Ocean[J].Journal of Nanjing Institute of Meteorology,2011,34(5):574-582. |
| |
| Authors: | ZHANG Fei-yan XU Hai-ming |
| |
| Institution: | ZHANG Fei-yan1,2,XU Hai-ming1,2(1.Key Laboratory of Meteorological Disaster of Ministry of Education,2.School of Atmospheric Sciences,NUIST,Nanjing 210044,China) |
| |
| Abstract: | By using the mean monthly dataset of global sea surface temperature and geopotential height fields,and the surface air temperature records of 64 stations in spring in Northeast China from 1958 and 2007,this paper analyzes the spatial/temporal variation characteristics of spring extreme low temperature(SELT) in Northeast China,and its relationship with atmospheric circulation and sea surface temperature(SST) anomalies.The results show that:The occurrence frequency of SELT in Northeastern China has tended to ... |
| |
| Keywords: | spring extreme low temperature interannual variability SST anomaly cold vortex in Northeast China |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
