北极海冰与CP型厄尔尼诺事件的遥相关  

TELECONNECTION BETWEEN ARCTIC SEA ICE AND CP EL NIÑO EVENTS

作　　者：郑璐曦 刘海龙[1,2,3] ZHENG Lu-Xi;LIU Hai-Long(School of Oceanography,Shanghai Jiao Tong University,Shanghai 200030,China;Polar Research Institute of China,Shanghai 200136,China;Key Laboratory for Polar Science of Ministry of Natural Resources,Polar Research Institute of China,Shanghai 200136,China)

机构地区：[1]上海交通大学海洋学院,上海200030 [2]中国极地研究中心,上海200136 [3]中国极地研究中心、自然资源部极地科学重点实验室,上海200136

出　　处：《海洋与湖沼》2024年第4期830-839,共10页Oceanologia Et Limnologia Sinica

基　　金：上海交通大学深蓝计划,SL2021ZD204号;中德合作交流项目(Mobility),M0333号;上海市极地前沿科学研究基地基金。

摘　　要：为了进一步认识高低纬度之间事件的遥相关机制,对北极海冰和中太平洋(central Pacific,CP)型厄尔尼诺现象的相互关系进行了深入研究。首先利用最新的观测和再分析数据,验证了北极冷季海冰损失可以引发次年的类CP型厄尔尼诺增暖现象及相应的副热带北太平洋海气耦合机制,阐明北极海冰异常引起春末夏初的北太平洋气压异常,进而导致热带太平洋海温增加和西风异常,最终在冬季发生类CP型厄尔尼诺现象的变暖。依据前人对CP型厄尔尼诺发展年夏季的研究思路,研究结果显示,在CP型厄尔尼诺发展年冷季,加拿大盆地海冰显著减少导致北极海冰范围总体出现异常低值,但在巴伦支海北部因风场作用海冰异常增加。同时揭示了在CP型厄尔尼诺衰退年,暖季北极海冰显著损失,海表面净热通量显著增加以及海表面风和海冰运动等动力效应有助于拉普捷夫海海冰的损失,北极海冰和CP型厄尔尼诺相互关系的理论得到了一定的完善。The teleconnection between high and low latitudes in the case of between Arctic sea ice and central Pacific(CP)El Niño phenomenon was studied.Based on the latest observation and reanalysis data,the phenomena that the loss of Arctic sea ice in cold seasons can lead to CP El Niño in the following year,and the corresponding ocean-air coupling mechanism in the subtropical North Pacific were clarified.Results show that Arctic sea ice anomaly causes the abnormal pressure in the North Pacific Ocean in late spring and early summer,which leads to the increase of SST(sea surface temperature)in the tropical Pacific Ocean and the abnormal westerly wind.Eventually,CP El Niño occurs in the winter.Based on previous research ideas on the summer of CP El Niño development years,in the cold season of CP El Niño development years,the significant decrease of sea ice in the Canadian basin has effect on low Arctic sea ice range anomaly,but the sea ice is abnormally increased in the northern Barents Sea due to the effect of wind field.Besides,it was revealed that in the CP El Niño decline years,the Arctic sea ice loss is significant in the warm season,the increase of net sea surface heat flux,the dynamic effects of sea surface wind,and sea ice motion contribute to the sea ice loss in the Laptev Sea.This study advanced the theoretical improvement of the remote correlation between Arctic sea ice and CP El Niño.

关 键 词：北极海冰 中太平洋型厄尔尼诺 海表面净热通量 海表面风 海冰运动 

分 类 号：P731[天文地球—海洋科学]