中国海洋大学学报（自然科学版）2025，Vol.55Issue(7)：1-6,6.DOI:10.16441/j.cnki.hdxb.20240348
夏季北太平洋经向模态对北半球陆地气温的影响
Effect of the Summertime North Pacific Meridional Mode on the Northern Hemisphere Surface Air Temperature
摘要
Abstract
The North Pacific meridional mode(NPMM)is the leading ocean-atmosphere coupled mode in the subtropical Northeastern Pacific.Previous studies showed that,due to the northward displaced intertropical convergence zone in summer,the NPMM can shift the convergence zone meridionally,in-ducing precipitation anomalies,which excite a circumglobal teleconnection-like wave train,impacting on surface air temperature in China.However,the spatial distribution and dominant mechanism of the wave train-induced surface air temperature anomalies in other regions in the Northern Hemisphere re-main unclear.This study uses observational data for 1950-2014,finding that during the warm phase of the NPMM,in addition to its wave train-induced temperature anomalies in China,it also causes an in-crease in Western North America and decrease in Eastern North America,Central and Northeast Eura-sia.Further analysis indicates that such impact is due to the wave train-associated high-and low-pres-sure anomalies.The high-pressure anomalies reduce cloud cover,increasing downward shortwave radia-tion,thus the surface air temperature,and vice versa.The above findings provide a new perspective for improving the prediction skill of surface air temperature variations over these regions in the northern hemisphere.关键词
北太平洋经向模态/大气遥相关/陆地气温/热带辐合带/大气波列Key words
North Pacific meridional mode/atmospheric teleconnection/surface air temperature/in-tertropical convergence zone/wave train分类
海洋学引用本文复制引用
龚康华,张钰,李子光,林霄沛..夏季北太平洋经向模态对北半球陆地气温的影响[J].中国海洋大学学报（自然科学版）,2025,55(7):1-6,6.基金项目
崂山实验室项目(LSKJ202202602) （LSKJ202202602）
中国博士后科学基金项目(2021M703034) （2021M703034）
国家自然科学基金项目(W2411039)资助Supported by the Laoshan Laboratory Project(LSKJ202202602) （W2411039）
the China Postdoctoral Science Foundation Project(2021M703034) （2021M703034）
the National Natural Science Foundation of China(W2411039) （W2411039）
