doi:  10.3878/j.issn.1006-9895.1811.18214
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 Extreme Cold Surface Temperature
摘要点击 122  全文点击 68  投稿时间:2018-08-06  
查看HTML全文  查看全文  查看/发表评论  下载PDF阅读器
基金:  国家自然科学基金项目41575041、41430533、91837311,中国科学院先导专项项目XDA17010105,中国科学院前沿项目QYZDY-SSW- DQC018
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,北京100029;中国科学院大学,北京100049
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,北京100029;南京信息工程大学气象灾害预报预警与评估协同创新中心,南京210044
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,43(6):1313-1328,doi:10.3878/j.issn.1006-9895.1811.18214.
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 Extreme Cold Surface Temperature[J].Chinese Journal of Atmospheric Sciences (in Chinese),43(6):1313-1328,doi:10.3878/j.issn.1006-9895.1811.18214.
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 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 on 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 a single blocking from multiple blockings (double blockings, three blockings and four blockings), it is further demonstrated that the influence of UB on Eurasia SAT is the most important. However, the blocking systems that have secondary impacts on SAT over Europe and Asia are different. AEB, GB and NPB rank next for Europe while GB, NPB and AEB rank next for Asia in order of importance. 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 significantly nonlinear instead of a linear superposition.
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