春季东大西洋/西俄罗斯遥相关型异常与我国气温异常的联系  

Variation characteristics of spring East Atlantic/West Russia teleconnection pattern and its relationship with temperature anomalies in China

作　　者：李忠贤[1,2] 黄源源 王健治 LI Zhongxian;HUANG Yuanyuan;WANG Jianzhi(Key Laboratory of Meteorological Disaster of Ministry of Education(KLME)/Joint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD),Nanjing University of Information Science&Technology,Nanjing 210044,China;School of Atmospheric Sciences,Nanjing University of Information Science&Technology,Nanjing 210044,China;Meteorological Observatory of Xiamen Air Traffic Management Bureau,Civil Aviation Administration of China,Xiamen 361006,China)

机构地区：[1]南京信息工程大学气象灾害教育部重点实验室/气候与环境变化国际联合实验室/气象灾害预报预警与评估协同创新中心,江苏南京210044 [2]南京信息工程大学大气科学学院,江苏南京210044 [3]中国民用航空局厦门空中交通管理站气象台,福建厦门361006

出　　处：《大气科学学报》2023年第6期876-883,共8页Transactions of Atmospheric Sciences

基　　金：国家自然科学基金资助项目(42175034)。

摘　　要：利用1979—2017年逐月中国160站气温资料和美国NCEP-DOE再分析资料,研究了春季东大西洋/西俄罗斯(East Atlantic/West Russia,EATL/WRUS)遥相关型异常与我国气温异常的联系,并初步探讨了这一联系的可能物理机制。研究结果表明,春季EATL/WRUS遥相关型正(负)位相表现为北大西洋至欧亚大陆中高纬地区的500 hPa位势高度场“+-+”(“-+-”)纬向波列,该波列的三个主要活动中心分别位于西欧、乌拉尔山附近和贝加尔湖南侧。在垂直方向上,春季EATL/WRUS遥相关型具有明显的相当正压结构。春季EATL/WRUS遥相关型异常与我国西北地区春季气温异常具有显著的正相关关系。当春季EATL/WRUS遥相关型处于正(负)位相年,乌拉尔山附近地区为负(正)位势高度异常和气旋性(反气旋性)环流异常,贝加尔湖南侧地区出现正(负)位势高度异常和反气旋性(气旋性)环流异常,使得影响我国西北地区的冷空气减弱(加强),从而导致我国西北地区春季气温异常升高(降低)。Based on the observed monthly temperature data of 160 stations in China and NCEP-DOE reanalysis(R-2)data from 1979 to 2017,the variation characteristics of spring East Atlantic/West Russia(EATL/WRUS)teleconnection pattern and its relationship with spring temperature anomalies in China are investigated in this paper.Results show that the positive(negative)phase of spring EATL/WRUS pattern presents a“+-+”(“-+-”)zonal wave train over 500 hPa from North Atlantic to middle and high latitudes of Eurasia.The main active centers of the wave train are located in West Europe,near the Urals and south to the Lake Baikal,respectively.In the vertical direction,spring EATL/WRUS pattern is featured by a significant quasi-barotropic structure.There is a significant positive correlation between spring EATL/WRUS pattern anomaly and the spring temperature anomalies in Northwest China.During the positive(negative)phase years of spring EATL/WRUS pattern,there are negative(positive)anomaly of geopotential height and anomalous cyclonic(anticyclonic)circulation near the Urals,as well as positive(negative)anomaly of geopotential height and anomalous anticyclonic(cyclonic)circulation south to the Lake Baikal,which weakens(strengthens)the cold air affecting Northwest China,leading to an increase(decrease)of spring temperature in Northwest China.

关 键 词：东大西洋/西俄罗斯型 大气遥相关 气温异常 环流异常 波活动通量 

分 类 号：P423[天文地球—大气科学及气象学]