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Quantification of subsurface heat storage in a GCM simulation

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MacDougall, Andrew H. and González Rouco, J. Fidel and Stevens, M. Bruce and Beltrami, Hugo (2008) Quantification of subsurface heat storage in a GCM simulation. Geophysical research letters, 35 (13). ISSN 0094-8276

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Official URL: http://dx.doi.org/10.1029/2008GL034639




Abstract

Shallow bottom boundary conditions (BBCs) in the soil components of general circulation models (GCMs) impose artificial limits on subsurface heat storage. To assess this problem we estimate the subsurface heat content from two future climate simulations and compare to that obtained from an offline soil model (FDLSM) driven by GCM skin temperatures. FDLSM is then used as an offline substitute for the subsurface of the GCM ECHO-G. With a 600-m BBC and driven by ECHO-G future temperatures, the FDLSM subsurface absorbs 6.2 (7.5) times more heat than the ECHO-G soil model (10 m deep) under the Intergovernmental Panel on Climate Change (IPCC) A2 (B2) emission scenario. This suggests that shallow BBCs in GCM simulations may underestimate the heat stored in the subsurface, particularly for northern high latitudes. This effect could be relevant in assessing the energy balance and climate change in the next century.


Item Type:Article
Additional Information:

Copyright 2008 by the American Geophysical Union. This research was funded by grants from NSERC Discovery, AIF (ACOA), CFCAS, and ACEnet (HB); Ramón y Cajal (JFGR); NSERC PGS-D (MBS); and NSERC USRA (AHM).

Uncontrolled Keywords:Climate; Canada
Subjects:Sciences > Physics > Astrophysics
Sciences > Physics > Astronomy
ID Code:36339
Deposited On:11 Mar 2016 13:27
Last Modified:10 Dec 2018 15:05

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