doi:  10.3878/j.issn.1006-9895.1812.18214
北半球冬季各阻塞系统对大范围极端温度异常的单独和协同影响

The independent and coordinative influences of the four blocking systems in the Northern Hemisphere winter on the occurrence of widespread surface extreme cold temperature
摘要点击 84  全文点击 7  投稿时间:2018-08-06  修订日期:2018-10-18
查看HTML全文  查看全文  查看/发表评论  下载PDF阅读器
基金:  41575041、41430533Funded by Key Research Program of Frontier Sciences (Grant QYZDY-SSW-DQC018), Strategic Priority Research Program of the Chinese Academy of Sciences (Grant XDA17010105), National Natural Science Foundation of China (Grants 41575041, 41430533)
中文关键词:  阻塞高压  地面温度 极端冷日  协同影响
英文关键词:  Blocking  systems, Surface  air temperature, Extreme  cold days, Coordinative  effects
     
作者中文名作者英文名单位
李亚飞Li Yafei中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室
任荣彩Ren Rongcai中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室
引用:李亚飞,任荣彩.2019.北半球冬季各阻塞系统对大范围极端温度异常的单独和协同影响[J].大气科学
Citation:Li Yafei,Ren Rongcai.2019.The independent and coordinative influences of the four blocking systems in the Northern Hemisphere winter on the occurrence of widespread surface extreme cold temperature[J].Chinese Journal of Atmospheric Sciences (in Chinese)
中文摘要:
      本文利用1979-2015年ERA-interim逐日再分析资料,对比分析了格陵兰阻高(GB)、大西洋-欧洲阻高(AEB)、乌拉尔山阻高(UB)和北太平洋阻高(NPB)四个阻高系统对年际尺度和天气尺度地面温度及极端冷日的单独和协同影响。结果表明,各阻高与地面温度之间的统计关系十分复杂,同一阻高系统可影响多个地区的温度异常,同一个地区的地面温度一般可受到多个阻高系统的不同影响。通过分离单阻高和多阻高(双阻高、三阻高和四阻高)组合的情形,本文的结果进一步表明,UB对欧亚大陆地面温度的影响最为重要,其次对于欧洲地面温度而言,依次为AEB、GB和NPB;对于亚洲地面温度而言,依次则为GB、NPB和AEB。而NPB对北美大陆温度的影响最为重要,其次为GB和AEB,UB的影响最弱。此外,多阻高协同影响地面温度时,并非线性叠加,而是表现为显著的非线性特征。
Abstract:
      Based on 1979–2015 ERA-interim daily reanalysis data, this paper analyzes the independent and coordinative effects of the four blocking systems (the Greenland blocking, GB; the Atlantic-Europe blocking, AEB; the Ural blocking, UB; the North Pacific blocking, NPB) on surface air temperature (SAT) and extreme cold days from interannual and synoptic scales. The results show that the statistical relationship between the blocking systems and SAT is very complicated. The same blocking system can affect SAT anomalies in many areas. Meanwhile the SAT in the same area is generally affected by many blocking systems. By separating the single blocking and the multiple blocking (double blocking, three blocking and four blocking), it is further demonstrated that the influence of UB on Eurasia SAT is the most important. However, the blocking systems that have a secondary impact on SAT over Europe and Asia are different. It are AEB, GB and NPB for Europe in turn, but for Asia, it are GB, NPB and AEB in turn. The blocking system that has the most important influence on the SAT over the North American is NPB, followed by GB and AEB, and the effect of UB is the weakest. In addition, the coordinative effects of multiple blocking systems on SAT are not a linear superposition, but a significant nonlinearity.
主办单位:中国科学院大气物理研究所 单位地址:北京市9804信箱
联系电话: 010-82995051,010-82995052传真:010-82995052 邮编:100029 Email:dqkx@mail.iap.ac.cn
本系统由北京勤云科技发展有限公司设计
京ICP备09060247号