极地研究2025，Vol.37Issue(3)：477-493,17.DOI:10.13679/j.jdyj.20230057
中国再分析资料对于北极涛动和南极涛动的适用性分析
The characteristics of Arctic Oscillation and Antarctic Oscillation based on CMA's atmospheric reanalysis
摘要
Abstract
The Arctic Oscillation(AO)and Antarctic Oscillation(AAO)are important modes that typically affect atmospheric circulation and temperature changes outside tropical areas,and they are considered significant drivers of the internal variability of climate systems.Based on China's CRA40 reanalysis dataset and using ERA5 reanalysis data as a reference,this paper presents a statistical analysis of the spatiotemporal variations of the AO and AAO during 1989-2020 and the pattern of atmospheric circulation during strong and weak years of oscillation,thus verifying the applicability of CRA40 for analyzing the AO and AAO.The results show that:(1)the master mode of geopotential height based on CRA40 presents the zonal distribution char-acteristics of reverse variation in middle-high latitudes,which is consistent with the ERA5 reanalysis data;(2)throughout the analysis period,there is a significant correlation between the oscillation index based on CRA40 and that of the National Oceanic and Atmospheric Administration;(3)in strong(weak)years of os-cillation indicated by CRA40,the sea-level pressure and temperature at high latitudes exhibit negative(positive)anomalies,the wind field is cyclonic(anticyclonic),and the distribution of each element field at middle latitudes is the opposite of that at high latitudes;and(4)the mean zonal wind in the strong and weak oscillation years identified by CRA40 exhibits a zonal teleconnection with alternating positive-negative dis-tribution and a barotropic structure.The analysis indicates that CRA40 effectively reflects the spatiotempo-ral distribution and structure of atmospheric circulation associated with the AO and AAO.关键词
中国再分析大气资料/南极涛动/北极涛动/适用性Key words
CMA's atmospheric reanalysis/Antarctic Oscillation/Arctic Oscillation/applicability引用本文复制引用
杨镕泽,李佳瑶,周顺武,冷佳星..中国再分析资料对于北极涛动和南极涛动的适用性分析[J].极地研究,2025,37(3):477-493,17.基金项目
国家重点研发计划(2022YFF0801703)、国家自然科学基金重点项目(42030602,42192512)和国家自然科学基金重大研究计划集成项目(91837311)资助 （2022YFF0801703）
