The linkage between the sea ice concentration(SIC)over the Barents-Kara Seas in November-December(SICBKSND)and the stratospheric polar vortex(SPV)in subsequent January(SPVJan)is investigated.It is found that SICBKS-ND is positively(negatively)correlated with SPV Jan for the period 1979-1995(1996-2009).Further analyses reveal that,during 1979-1995(1996-2009),SICBKSND is relatively higher(lower),accompan-ied by smaller(larger)interannual variability with its center shifting northwest(southeast).Meanwhile,the polar front jet waveguide is relatively stronger(weaker).The simultaneous anomalous eastward-propagating Rossby waves excited by anomalously low SIC_BKS_ND are stronger(weaker),which results in the stronger(weaker)negative-positive-negative wave-train structure of geopotential height anomalies over Eurasia,with the location of these an-omalous height centers shifting remarkably westward(eastward).Such changes tend to enhance(suppress)vertically propagating tropospheric planetary waves into the lower stratosphere at high-latitude via constructive(destructive)interference of anomalous tropospheric wave-train structure with the climatological planetary waves,subsequently weakening(strengthening)SPV_Jan.However,in conjunction with anomalously high SIC_BKS ND,the interfer-ence of the tropospheric wave-train structure anomalies and their climatologies shows an opposite distribution to that of low SICBKSND anomalies,which leads to a strong(weak)SPV_Jan anomaly during 1979-1995(1996-2009).

Haibo ZHOU;Ke FAN

Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029;University of Chinese Academy of Sciences,Beijing 100049;School of Atmospheric Science,Sun Yat-sen University,and Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai519082

气象学报（英文版）

[1]Haibo ZHOU;Ke FAN-.Decadal Change of the Linkage between Sea Ice over the Barents-Kara Seas in November-December and the Stratospheric Polar Vortex in Subsequent January)[J].气象学报（英文版）,2022(04):601-617

SICBKSND,SPVJan,SICBKS,accompan,omalous,climatologies

Decadal,Change,Linkage,between,Ice,over,Barents,Kara,Seas,November,December,Stratospheric,Polar,Vortex,Subsequent,January,linkage,sea,ice,concentration,stratospheric,polar,vortex,investigated,It,found,that,positively,negatively,correlated,period,Further,analyses,reveal,during,relatively,higher,lower,ied,smaller,larger,interannual,variability,its,shifting,northwest,southeast,Meanwhile,front,jet,waveguide,stronger,weaker,simultaneous,eastward,propagating,Rossby,waves,excited,anomalously,which,results,train,structure,geopotential,height,anomalies,Eurasia,location,these,centers,remarkably,westward,Such,changes,tend,enhance,suppress,vertically,tropospheric,planetary,into,stratosphere,latitude,via,constructive,destructive,interference,climatological,subsequently,weakening,strengthening,However,conjunction,their,shows,opposite,distribution,leads,anomaly

0.487235