Response of the Intertropical Convergence Zone to Antarctic Ice Sheet melt.

Bakker, P. and Prange, M. (2018) Response of the Intertropical Convergence Zone to Antarctic Ice Sheet melt. Open Access Geophysical Research Letters . DOI 10.1029/2018GL078659.

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Past cooling events in the Northern Hemisphere have been shown to impact the location of the intertropical convergence zone (ITCZ) and therewith induce a southward shift of tropical precipitation. Here we use high‐resolution coupled ocean‐atmosphere simulations to show that reasonable past melt rates of the Antarctic Ice Sheet can similarly have led to shifts of the ITCZ, albeit in opposite direction, through large‐scale surface air temperature changes over the Southern Ocean. Through sensitivity experiments employing slightly negative to large positive meltwater fluxes we deduce that meridional shifts of the Hadley cell and therewith the ITCZ are, to a first order, a linear response to Southern Hemisphere high‐latitude surface air temperature changes and Antarctic Ice Sheet melt rates. This highlights the possibility to use past episodes of anomalous melt rates to better constrain a possible future response of low latitude precipitation to continued global warming and a shrinking Antarctic Ice Sheet.

Document Type: Article
Additional Information: This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process , which may lead to differences between this version and the Versi on of Record. Please cite this article as doi: 10.1029/2018GL078659
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/2018GL078659
ISSN: 0094-8276
Projects: PalMod
Date Deposited: 20 Aug 2018 13:57
Last Modified: 04 Feb 2019 00:38

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