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Detection of an observed 135 year ocean temperature change from limited data


Hobbs, WR and Willis, JK, Detection of an observed 135 year ocean temperature change from limited data, Geophysical Research Letters, 40, (10) pp. 2252-2258. ISSN 0094-8276 (2013) [Refereed Article]


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Copyright 2013 American Geophysical Union

DOI: doi:10.1002/grl.50370


Recent work comparing historical hydrographic data with modern Argo observations shows a long-term change in the global ocean temperature. The magnitude of this change is greater than estimates of late 20th century warming, and implies a century-scale change in the global oceans. Using global coupled climate models from the Coupled Model Intercomparison Project Phase 5 suite of simulations, we assess to what extent this observed temperature difference can be attributed to a genuine long-term warming trend. After accounting for natural variability and sampling errors, we find convincing evidence that there has indeed been a century-scale anthropogenic warming of the global ocean up to the present day, and a strong possibility of anthropogenic warming from 1873 to 1955. The estimated 1873-1955 ocean warming implies a net top-of-atmosphere energy imbalance of 0.1 ± 0.06 Wm-2, and a thermosteric global mean sea level rise of 0.50 ± 0.2 mma-1.

Item Details

Item Type:Refereed Article
Keywords:Ocean heat content; sea level rise, energy balance
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:Global effects of climate change (excl. Australia, New Zealand, Antarctica and the South Pacific) (excl. social impacts)
UTAS Author:Hobbs, WR (Dr Will Hobbs)
ID Code:89012
Year Published:2013
Web of Science® Times Cited:6
Deposited By:IMAS Research and Education Centre
Deposited On:2014-02-24
Last Modified:2017-10-31
Downloads:163 View Download Statistics

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