Document Type

Journal Article

Faculty

Faculty of Computing, Health and Science

School

School of Natural Sciences

RAS ID

15133

Comments

This article was originally published as: Kim, J., Crosta, X., Willmott, V., Renssen, H., Bonnin, J., Helmke, P. , Schouten, S., & Sinninghe Damste, J. (2012). Holocene subsurface temperature variability in the eastern Antarctic continental margin. Geophysical Research Letters, 39(6), 1-6. Original article available here

Abstract

We reconstructed subsurface (∼45-200m water depth) temperature variability in the eastern Antarctic continental margin during the late Holocene, using an archaeal lipid-based temperature proxy (TEX 86 L). Our results reveal that subsurface temperature changes were probably positively coupled to the variability of warmer, nutrient-rich Modified Circumpolar Deep Water (MCDW, deep water of the Antarctic circumpolar current) intrusion onto the continental shelf. The TEX 86 L record, in combination with previously published climatic records, indicates that this coupling was probably related to the thermohaline circulation, seasonal variability in sea ice extent, sea temperature, and wind associated with high frequency climate dynamics at low-latitudes such as internal El Nio Southern Oscillation (ENSO). This in turn suggests a linkage between centennial ENSO-like variability at low-latitudes and intrusion variability of MCDW into the eastern Antarctic continental shelf, which might have further impact on ice sheet evolution. Copyright 2012 by the American Geophysical Union.

DOI

10.1029/2012GL051157

Access Rights

free_to_read

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