热带气象学报2017，Vol.33Issue(6)：903-911,9.DOI:10.16032/j.issn.1004-4965.2017.06.011
黑潮延伸体区域海表温度锋的时空变化特征分析
THE VARIATION OF THE KUROSHIO EXTENSION SST FRONT
摘要
Abstract
By using NOAA daily Optimum Interpolation Sea Surface Temperature dataand AVISO sea surface heightanomaly data,this paper analyzes the variation of Kuroshio Extension SST front and the cause for its low-frequency variation.Result shows that the mean Kuroshio Extension SST front is adjacent to the Kuroshio Extension,with two meanders located at 143 °E and 150 °E,respectively.The maximum of the SST gradient is located near 142 °E,exceeding4.5 ℃/(100km),and the strength of the SST front gradually decreases from west to east and has a weak maximum value center around 149 °E.Averaged over 141 ～ 153 °E,the mean position of the Kuroshio Extension SST front is 36.25 °N,and the mean strength is 3.22℃/(100km).The seasonal variation of the SST front position is weak,but its strength has significantly strong seasonal variation.Compared with weak seasonal variation,the interannual to interdecadal variation of SST front position is relatively strong,which can exceed 2 °.The strength of the Kuroshio Extension SST front also has significant interannual to interdecadal variation,which can exceed 4.5℃/ (100km).The variation of Kuroshio Extension SST front is closely linked with the Pacific Decadal Oscillation(PDO) and North Pacific Gyre Oscillation (NPGO),the sea surface height anomaly forced by the NPGO and PDO will propagate westward,and about 3 years later reaches the Kuroshio Extension and influences the variation of the sea surface height,and finally results in the variation of SST front strength.关键词
黑潮延伸体/海表温度锋/时空变化/PDO/NPGOKey words
Kuroshio Extension/SST front/temporal and spatial variation/PDO/NPGO分类
海洋科学引用本文复制引用
刘明洋,谭言科,李崇银,余沛龙,殷明..黑潮延伸体区域海表温度锋的时空变化特征分析[J].热带气象学报,2017,33(6):903-911,9.基金项目
国家“973”项目(2013CB956203) （2013CB956203）
国家自然科学基金项目(41490642、41475070)共同资助 （41490642、41475070）
