Enhanced Arabian Sea intermediate water flow during glacial North Atlantic cold phases

S.J.A. Jung, D. Kroon, G.M. Ganssen, F.J.C. Peeters, R. Ganeshram

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

During the last glacial period, polar ice cores indicate climate asynchrony between the poles at the millennial time-scale. Yet, surface ocean circulation in large parts of the globe varied in tune with Greenland temperature fluctuations suggesting that any anti-phase behavior to a substantial degree must lie in the deeper global ocean circulation which is poorly understood outside the Atlantic Ocean. Here we present data from the north-western Indian Ocean which indicate that the timing of maxima in northward extensions of glacial Antarctic Intermediate Water (GAAIW) coincides with dramatically reduced thermohaline overturn in the North Atlantic associated with the Heinrich-ice surge events (HE). The repeated expansion of the GAAIW during HEs, recorded far north of the equator in the Arabian Sea, suggests that southern hemisphere driven intermediate water mass variability forms an integral part of the inter-hemisphere asynchronous climate change behavior at the millennial time-scale. Crown Copyright © 2009.
Original languageEnglish
Pages (from-to)220-228
Number of pages9
JournalEarth and Planetary Science Letters
Volume208
DOIs
Publication statusPublished - 2009

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Arabian Sea
Antarctic Intermediate Water
water flow
intermediate water
Ice
seawater
timescale
overturn
Water
ice
Last Glacial
global ocean
ice core
water
Southern Hemisphere
globes
ocean surface
Atlantic Ocean
Indian Ocean
Greenland

Cite this

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title = "Enhanced Arabian Sea intermediate water flow during glacial North Atlantic cold phases",
abstract = "During the last glacial period, polar ice cores indicate climate asynchrony between the poles at the millennial time-scale. Yet, surface ocean circulation in large parts of the globe varied in tune with Greenland temperature fluctuations suggesting that any anti-phase behavior to a substantial degree must lie in the deeper global ocean circulation which is poorly understood outside the Atlantic Ocean. Here we present data from the north-western Indian Ocean which indicate that the timing of maxima in northward extensions of glacial Antarctic Intermediate Water (GAAIW) coincides with dramatically reduced thermohaline overturn in the North Atlantic associated with the Heinrich-ice surge events (HE). The repeated expansion of the GAAIW during HEs, recorded far north of the equator in the Arabian Sea, suggests that southern hemisphere driven intermediate water mass variability forms an integral part of the inter-hemisphere asynchronous climate change behavior at the millennial time-scale. Crown Copyright {\circledC} 2009.",
author = "S.J.A. Jung and D. Kroon and G.M. Ganssen and F.J.C. Peeters and R. Ganeshram",
year = "2009",
doi = "10.1016/j.epsl.2009.01.037",
language = "English",
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journal = "Earth and Planetary Science Letters",
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Enhanced Arabian Sea intermediate water flow during glacial North Atlantic cold phases. / Jung, S.J.A.; Kroon, D.; Ganssen, G.M.; Peeters, F.J.C.; Ganeshram, R.

In: Earth and Planetary Science Letters, Vol. 208, 2009, p. 220-228.

Research output: Contribution to JournalArticleAcademicpeer-review

TY - JOUR

T1 - Enhanced Arabian Sea intermediate water flow during glacial North Atlantic cold phases

AU - Jung, S.J.A.

AU - Kroon, D.

AU - Ganssen, G.M.

AU - Peeters, F.J.C.

AU - Ganeshram, R.

PY - 2009

Y1 - 2009

N2 - During the last glacial period, polar ice cores indicate climate asynchrony between the poles at the millennial time-scale. Yet, surface ocean circulation in large parts of the globe varied in tune with Greenland temperature fluctuations suggesting that any anti-phase behavior to a substantial degree must lie in the deeper global ocean circulation which is poorly understood outside the Atlantic Ocean. Here we present data from the north-western Indian Ocean which indicate that the timing of maxima in northward extensions of glacial Antarctic Intermediate Water (GAAIW) coincides with dramatically reduced thermohaline overturn in the North Atlantic associated with the Heinrich-ice surge events (HE). The repeated expansion of the GAAIW during HEs, recorded far north of the equator in the Arabian Sea, suggests that southern hemisphere driven intermediate water mass variability forms an integral part of the inter-hemisphere asynchronous climate change behavior at the millennial time-scale. Crown Copyright © 2009.

AB - During the last glacial period, polar ice cores indicate climate asynchrony between the poles at the millennial time-scale. Yet, surface ocean circulation in large parts of the globe varied in tune with Greenland temperature fluctuations suggesting that any anti-phase behavior to a substantial degree must lie in the deeper global ocean circulation which is poorly understood outside the Atlantic Ocean. Here we present data from the north-western Indian Ocean which indicate that the timing of maxima in northward extensions of glacial Antarctic Intermediate Water (GAAIW) coincides with dramatically reduced thermohaline overturn in the North Atlantic associated with the Heinrich-ice surge events (HE). The repeated expansion of the GAAIW during HEs, recorded far north of the equator in the Arabian Sea, suggests that southern hemisphere driven intermediate water mass variability forms an integral part of the inter-hemisphere asynchronous climate change behavior at the millennial time-scale. Crown Copyright © 2009.

U2 - 10.1016/j.epsl.2009.01.037

DO - 10.1016/j.epsl.2009.01.037

M3 - Article

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SP - 220

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JO - Earth and Planetary Science Letters

JF - Earth and Planetary Science Letters

SN - 0012-821X

ER -