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大气科学(气象学)

2015-10-31

中国学术期刊文摘 2015年14期
关键词:气象学出版物邮箱

大气科学(气象学)

来源出版物:SCIENCE CHINA Earth Sciences,2015,58(5): 676-684联系邮箱:HUANG Wei,whuang@lzu.edu.cn

封面介绍:The term “westerlies-dominated climatic regime” describes an opposing pattern of precipitation variations between westerlies-dominated arid Central Asia and mid-latitude monsoon-dominated Asia on decadal to multi-millennial time scales. The combination of the circumglobal teleconnection(CGT),anomalous Indian Summer Monsoon Precipitation(ISMP)and Atlantic Multidecadal Oscillation(AMO)causes this summer precipitation pattern on decadal time scales. For more details see the research paper by HUANG Wei et al. on pages 676-684.

Definition of the core zone of the “westerlies-dominated climatic regime”,and its controlling factors during the instrumental period

HUANG Wei,CHEN Jianhui,ZHANG Xiaojian,et al.

The term “westerlies-dominated climatic regime” describes the pattern of precipitation/ moisture variations between westerlies- dominated arid Central Asia(ACA)and mid-latitude monsoon-dominated Asia on decadal to multi-millennial time scales. However,no attempts have been made to define its core region and the possible physical mechanisms responsible during theperiod of instrumental observations. The present study investigates the spatiotemporal variations of summer and winter precipitation on interannual to decadal time scales over mid-latitudes of the Eurasian continent using Empirical Orthogonal Function(EOF)analysis. Our results suggest the existence of an opposing pattern of summer precipitation variations between ACA and mid-latitude monsoon-dominated Asia and Mediterranean on decadal time scales. Based on these results,the core region influenced by the westerlies is outlined,including arid central Asia and Xinjiang in China(36°-54°N,50°-90°E). By using monthly NCEP-NCAR reanalysis,the relationship between the“westerlies-dominated climatic regime” and atmospheric circulation were also analyzed. The combination of the zonal climatic teleconnection pattern and anomalous Indian Summer Monsoon Precipitation(ISMP)causes the precipitation characteristics of the“westerlies-dominated climatic regime” precipitation pattern. In addition,the Atlantic Multidecadal Oscillation(AMO)may also have an important effect on the “westerlies-dominated climatic regime”.

Yanshan belt; Triassic; detrital zircon; LA-MC-ICPMS dating; sedimentation

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