Understanding the origins of interannual thermocline variations in the tropical Indian Ocean

Weidong Yu; Baoqiang Xiang; Lin Liu; Na Liu

doi:10.1029/2005GL024327

Understanding the origins of interannual thermocline variations in the tropical Indian Ocean

Weidong Yu, Baoqiang Xiang, Lin Liu, Na Liu

Research output: Contribution to journal › Article › peer-review

166 Scopus citations

Abstract

Based on the data analysis of the 1000 hPa wind, SST and SSH anomalies, it is revealed that the atmospheric variations associated with Indian Ocean Dipole (IOD, or referred as Indian Ocean Zonal Dipole Mode, IOZDM) consist of a pair of anticyclones closely north and south of the equator with accompanying intense equatorial easterly anomalies, while the atmospheric variations related to El Niño/Southern Oscillation (ENSO) include a strong anticyclone in the southeastern tropical Indian Ocean (TIO) at higher latitudes with strong along-shore wind anomalies near Java-Sumatra coast. The different atmospheric forcing patterns lead to the fact that oceanic thermocline variations associated with IOD/IOZDM are more closely confined to the region north of 10°S, while ENSO-induced thermocline variations are dominant south of 10°S.

Original language	English
Pages (from-to)	1-4
Number of pages	4
Journal	Geophysical Research Letters
Volume	32
Issue number	24
DOIs	https://doi.org/10.1029/2005GL024327
State	Published - Dec 28 2005
Externally published	Yes

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title = "Understanding the origins of interannual thermocline variations in the tropical Indian Ocean",

abstract = "Based on the data analysis of the 1000 hPa wind, SST and SSH anomalies, it is revealed that the atmospheric variations associated with Indian Ocean Dipole (IOD, or referred as Indian Ocean Zonal Dipole Mode, IOZDM) consist of a pair of anticyclones closely north and south of the equator with accompanying intense equatorial easterly anomalies, while the atmospheric variations related to El Ni{\~n}o/Southern Oscillation (ENSO) include a strong anticyclone in the southeastern tropical Indian Ocean (TIO) at higher latitudes with strong along-shore wind anomalies near Java-Sumatra coast. The different atmospheric forcing patterns lead to the fact that oceanic thermocline variations associated with IOD/IOZDM are more closely confined to the region north of 10°S, while ENSO-induced thermocline variations are dominant south of 10°S.",

author = "Weidong Yu and Baoqiang Xiang and Lin Liu and Na Liu",

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T1 - Understanding the origins of interannual thermocline variations in the tropical Indian Ocean

AU - Yu, Weidong

AU - Xiang, Baoqiang

AU - Liu, Lin

AU - Liu, Na

PY - 2005/12/28

Y1 - 2005/12/28

N2 - Based on the data analysis of the 1000 hPa wind, SST and SSH anomalies, it is revealed that the atmospheric variations associated with Indian Ocean Dipole (IOD, or referred as Indian Ocean Zonal Dipole Mode, IOZDM) consist of a pair of anticyclones closely north and south of the equator with accompanying intense equatorial easterly anomalies, while the atmospheric variations related to El Niño/Southern Oscillation (ENSO) include a strong anticyclone in the southeastern tropical Indian Ocean (TIO) at higher latitudes with strong along-shore wind anomalies near Java-Sumatra coast. The different atmospheric forcing patterns lead to the fact that oceanic thermocline variations associated with IOD/IOZDM are more closely confined to the region north of 10°S, while ENSO-induced thermocline variations are dominant south of 10°S.

AB - Based on the data analysis of the 1000 hPa wind, SST and SSH anomalies, it is revealed that the atmospheric variations associated with Indian Ocean Dipole (IOD, or referred as Indian Ocean Zonal Dipole Mode, IOZDM) consist of a pair of anticyclones closely north and south of the equator with accompanying intense equatorial easterly anomalies, while the atmospheric variations related to El Niño/Southern Oscillation (ENSO) include a strong anticyclone in the southeastern tropical Indian Ocean (TIO) at higher latitudes with strong along-shore wind anomalies near Java-Sumatra coast. The different atmospheric forcing patterns lead to the fact that oceanic thermocline variations associated with IOD/IOZDM are more closely confined to the region north of 10°S, while ENSO-induced thermocline variations are dominant south of 10°S.

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U2 - 10.1029/2005GL024327

DO - 10.1029/2005GL024327

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VL - 32

SP - 1

EP - 4

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 24

ER -

Understanding the origins of interannual thermocline variations in the tropical Indian Ocean

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