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Recent hemispheric asymmetry in global ocean warming induced by climate change and internal variability


Rathore, S and Bindoff, NL and Phillips, HE and Feng, M, Recent hemispheric asymmetry in global ocean warming induced by climate change and internal variability, Nature Communications, 11, (1) Article 2008. ISSN 2041-1723 (2020) [Refereed Article]


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© The Author(s) 2020. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

DOI: doi:10.1038/s41467-020-15754-3


Recent research shows that 90% of the net global ocean heat gain during 2005–2015 was confined to the southern hemisphere with little corresponding heat gain in the northern hemisphere ocean. We propose that this heating pattern of the ocean is driven by anthropogenic climate change and an asymmetric climate variation between the two hemispheres. This asymmetric variation is found in the pre-industrial control simulations from 11 climate models. While both layers (0–700 m and 700–2000 m) experience steady anthropogenic warming, the 0–700 m layer experiences large internal variability, which primarily drives the observed hemispheric asymmetry of global ocean heat gain in 0–2000 m layer. We infer that the rate of global ocean warming is consistent with the climate simulations for this period. However, the observed hemispheric asymmetry in heat gain can be explained by the Earth’s internal climate variability without invoking alternate hypotheses, such as asymmetric aerosol loading.

Item Details

Item Type:Refereed Article
Keywords:hemispheric asymmetry, global ocean warming, climate change, anthropogenic climate change
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Physical oceanography
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Understanding climate change
Objective Field:Climate variability (excl. social impacts)
UTAS Author:Rathore, S (Mr Saurabh Rathore)
UTAS Author:Bindoff, NL (Professor Nathan Bindoff)
UTAS Author:Phillips, HE (Associate Professor Helen Phillips)
ID Code:139522
Year Published:2020
Web of Science® Times Cited:17
Deposited By:Oceans and Cryosphere
Deposited On:2020-06-18
Last Modified:2022-08-29
Downloads:22 View Download Statistics

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