中国海洋大学学报（自然科学版）2026，Vol.56Issue(7)：11-22,12.DOI:10.16441/j.cnki.hdxb.20250253
北大西洋海温在1990年代的变异及其对大气河的影响
The Regime Shift of North Atlantic Sea Surface Temperature in the 1990s and Its Impact on Atmospheric Rivers
摘要
Abstract
The authors investigates the variation characteristics of the leading mode of sea surface tem-perature(SST)anomalies in the North Atlantic during 1980-2001 and analyzes its influence on the North Atlantic Oscillation(NAO)and Atmospheric Rivers(ARs).The results indicate that the leading pattern of North Atlantic SST anomalies predominantly exhibits a tripolar structure(North Atlantic Tripole,NAT)during 1980-2001.However,in the early winter of the 1990s,the leading mode shifts to a horseshoe-like pattern(North Atlantic Horseshoe,NAH),which exerts a significant impact on the atmospheric circulation in late winter.Analysis of the physical mechanism reveals that the NAH-like SST anomalies,through the transport of water vapor and heat at the sea-air interface exchange,alter the direction of atmospheric wind fields and moisture transport,which lead to a northward shift in the tracks of ARs.When ARs made landfall in northern Europe,enhanced precipitation-induced diabatic heating over Norway intensified baroclinic instability and storm track activity in this region,further triggering an eastward-shifted NAO anomaly pattern.In contrast,during the early winters of the 1980s,SST anomalies exhibited the NAT-type pattern,and under the influence of abnormally warm SSTs in the Gulf Stream region,the NAO phase rapidly reversed and AR pathways shifted southward.关键词
北大西洋海温/北大西洋涛动/大气河/马蹄型分布特征/三极子型分布特征Key words
North Atlantic sea surface temperature/North Atlantic Oscillation/Atmospheric river/horseshoe-like distribution pattern/tripole distribution pattern分类
海洋科学引用本文复制引用
杜天琪,贾英来..北大西洋海温在1990年代的变异及其对大气河的影响[J].中国海洋大学学报（自然科学版）,2026,56(7):11-22,12.基金项目
国家自然科学基金项目(41975065) （41975065）
泰山学者攀登计划项目(ZR2019ZD12)资助 Supported by the National Natural Science Foundation of China(41975065) （ZR2019ZD12）
the Taishan Panddeng Scholar Project(ZR2019ZD12) （ZR2019ZD12）
