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Control of land‐ocean temperature contrast by ocean heat uptake
Author(s) -
Lambert F. Hugo,
Chiang John C. H.
Publication year - 2007
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2007gl029755
Subject(s) - forcing (mathematics) , climatology , environmental science , general circulation model , radiative forcing , climate change , ocean heat content , flux (metallurgy) , atmospheric sciences , climate model , heat flux , constant (computer programming) , sea surface temperature , gcm transcription factors , ocean general circulation model , oceanography , geology , heat transfer , thermodynamics , chemistry , physics , organic chemistry , computer science , programming language
We show that the ratio of observed annual‐mean land temperature change to ocean surface temperature change, ϕ, has remained almost constant during 1955–2003. This is the case, despite most of the heat capacity of the climate system lying in the oceans, and rapid variations in climate forcing. Examining seven General Circulation Models (GCMs), we find land and ocean temperature behavior comparable to observations in six cases. For three models that reproduce observed ϕ and for which we have data, we find no significant changes in future ϕ under the SRES A1B scenario. We suggest that variations in land‐ocean heat flux primarily balanced by ocean heat uptake are sufficient to maintain constant ϕ. This flux is present in the six GCMs that resemble observations, suggesting that observed ϕ may remain constant into the future, even if radiative forcing is markedly different than in the past.