WP和NAO对中国东南部冬季温度的协同影响
投稿时间:2019-12-27  修订日期:2020-02-26  点此下载全文
引用本文:
摘要点击次数: 122
全文下载次数: 0
作者单位E-mail
施春华 南京信息工程大学大气科学学院 shi@nuist.edu.cn 
孙伟佳 南京信息工程大学  
郭栋 南京信息工程大学  
基金项目:国家重点基础研究发展计划(973计划);国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:本文使用NCEP/NCAR和ERA-Interim再分析资料及多元线性回归分析方法,研究了西太平洋遥相关型(Western Pacific teleconnection,WP)和北大西洋涛动(North Atlantic Oscillation,NAO)的不同配置对我国东南部冬季气温的影响。研究发现,WP正位相年,中低纬太平洋为异常暖性高压控制,其局地作用,使得我国东南部地区温度偏高;NAO正位相年,其遥相关作用,通过南北两支波列,分别调控南北槽系统,协同使得我国东南30?N附近温度偏低。这两种遥相关型共同作用时,当WP和NAO同位相,两者作用部分抵消,我国东南地区温度变化不显著;当WP为正位相NAO为负位相,两者同步的加热效应,我国东南部显著暖异常;当WP为负位相NAO为正位相,两者同步的冷却效应,我国东南部显著冷异常。
中文关键词:WP  NAO  中国东南  冬季气温
 
The Synergistic Effects of WP and NAO on the winter surface temperature in southeastern China
Abstract:NCEP/NCAR and ERA-Interim reanalysis data and multiple linear regression analysis are used to study impacts of the different configurations of the Western Pacific teleconnection (WP) and North Atlantic Oscillation (NAO) on winter surface temperature in southeastern China.It is found that in the positive phase of WP, the middle and low latitude Pacific Ocean is controlled by abnormal warm high, whose local effect makes a warmer winter in the southeastern China.In the positive phase year of NAO, two teleconnection wave trains regulate the north and south trough system respectively, synergistically make a colder winter around 30?N in southeast China. We classified WP and NAO into four configurations. Positive WP and NAO named configuration I, positive WP and negative NAO is configuration II, negative WP and NAO is configuration III, negative WP and positive NAO is configuration IV. When WP and NAO are in the same phase, their opposite effects are partially offset in winter in southeastern China. In winter of configuration II, the synchronous heating effects make it marmer in southeastern China. In configuration IV, synchronous cooling effects make a colder winter in southeastern China.
keywords:WP  NAO  southeastern china  winter temperature
  查看/发表评论  下载PDF阅读器