检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China [2]College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China
出 处:《Advances in Atmospheric Sciences》2020年第12期1338-1358,共21页大气科学进展(英文版)
基 金:This work was supported by National Natural Science Foundation of China(Grant No.41790473).
摘 要:Utilizing three different sets of reanalysis data,this study examines the long-and short-lived observed positive North Atlantic Oscillation(NAO)events(referred to as NAO+_LE and NAO+_SE)and long-and short-lived observed negative NAO events(referred to as NAO−_LE and NAO−_SE).Composite results indicate that the NAO-like circulation anomalies associated with the long-lived NAO events can reach the stratosphere,while they are primarily confined to the troposphere in the short-lived NAO events.Thus,the coupling/connection of stratospheric and tropospheric circulation anomalies is much better(worse)in the long-lived(short-lived)NAO events.A series of modified stratospheric initial-value experiments conducted with a simplified model indicate that a better(worse)connection between stratospheric and tropospheric circulation anomalies in the initial-value fields tend to gradually induce the NAO-like tropospheric circulation anomalies in the troposphere on the subsequent days,and thus naturally elongate(reduce)the lifetimes of the original NAO events by altering the tropospheric synoptic eddy vorticity flux over the North Atlantic region.
关 键 词:North Atlantic Oscillation LIFETIMES STRATOSPHERE eddy forcing
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.171