Disruptions of El Nino-Southern Oscillation Teleconnections by the MaddenJulian Oscillation

被引：35

作者：

Hoell, Andrew ^{[1
]}

Barlow, Mathew ^{[2
]}

Wheeler, Matthew C. ^{[3
]}

Funk, Chris ^{[1
,4
]}

机构：

[1] Univ Calif Santa Barbara, Dept Geog, Santa Barbara, CA 93106 USA

[2] Univ Massachusetts, Dept Environm Earth & Atmospher Sci, Lowell, MA USA

[3] Ctr Australian Weather & Climate Res, Melbourne, Vic, Australia

[4] US Geol Survey, Santa Barbara, CA USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2014年 / 41卷 / 03期

基金：

美国国家科学基金会;

关键词：

El Nino - Southern Oscillation; Madden Julian Oscillation; Disruption; SEA-SURFACE TEMPERATURE; JULIAN OSCILLATION; ATMOSPHERIC CIRCULATION; EQUATORIAL PACIFIC; ENSO RELATIONSHIP; INDIAN-OCEAN; VARIABILITY; PRECIPITATION; SST; HEMISPHERE;

D O I：

10.1002/2013GL058648

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The El Nino-Southern Oscillation (ENSO) is the leading mode of interannual variability, with global impacts on weather and climate that have seasonal predictability. Research on the link between interannual ENSO variability and the leading mode of intraseasonal variability, the Madden-Julian oscillation (MJO), has focused mainly on the role of MJO initiating or terminating ENSO. We use observational analysis and modeling to show that the MJO has an important simultaneous link to ENSO: strong MJO activity significantly weakens the atmospheric branch of ENSO. For weak MJO conditions relative to strong MJO conditions, the average magnitude of ENSO-associated tropical precipitation anomalies increases by 63%, and the strength of hemispheric teleconnections increases by 58%. Since the MJO has predictability beyond three weeks, the relationships shown here suggest that there may be subseasonal predictability of the ENSO teleconnections to continental circulation and precipitation. Key Points <list list-type="bulleted" id="grl51336-list-0001"> <list-item id="grl51336-li-0001">MJO modifies the magnitude of tropical Pacific precipitation during ENSO <list-item id="grl51336-li-0002">MJO modifies the midlatitude teleconnections during ENSO <list-item id="grl51336-li-0003">Low-level wind shows a link between MJO activity and ENSO air-sea coupling

引用

页码：998 / 1004

页数：7

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