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Low‐frequency climate variability in the Atlantic basin during the 20th century

机译：20世纪大西洋盆地的低频率气候变异性

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摘要

From joint sea surface temperature/sea level pressure (SST/SLP) EOF analyses, low‐frequency variability modes are compared. The multi‐decadal oscillation (MDO) changed phases twice during the 20th century, with its north Atlantic SST patterns resembling the Atlantic multi‐decadal oscillation (AMO). The quasi‐decadal oscillation (QDO) SST patterns displayed a double tripole configuration over the entire Atlantic basin, leading to tropical inter‐hemispheric out‐of‐phase relationship. From the mid‐1960s onward, while SST anomalies were negative to the north (negative phases of MDO/AMO), the Sahelian drought persisted with a weaker hurricane power dissipation index (PDI). During that period, the QDO modulated the intensity of the Sahelian drought. Copyright © 2010 Royal Meteorological Society.
机译：从联合海面温度＆sol;海平面压力＆lSST＆sol; SLP＆rpar; EOF分析比较了低频和低频率变化模式。多年代际振荡MDO在20世纪，它两次改变了相位，其北大西洋海表温度模式类似于大西洋的多连年代际振荡AMO。准连字符十阶振荡SST模式在整个大西洋盆地上显示出双重三重构造，从而导致热带半连字间和连字间的相位关系。从1960年代中期开始，尽管SST异常对MDO＆sol; AMO＆rpar;的北负阶段为负，但萨赫勒地区的干旱持续，飓风耗散指数＆ PDI＆rpar;较弱。在此期间，QDO调节了萨赫勒干旱的强度。版权所有©2010皇家气象学会。

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