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Kuhlbrodt, Till; Gregory, Jonathan (2012)
Publisher: American Geophysical Union
Languages: English
Types: Article
Under increasing greenhouse gas concentrations, ocean heat uptake moderates\ud the rate of climate change, and thermal expansion makes a substantial contribution to sea level rise. In this paper we quantify the differences in projections\ud among atmosphere-ocean general circulation models of the Coupled Model Intercomparison Project in terms of transient climate response, ocean heat uptake\ud efficiency and expansion efficiency of heat. The CMIP3 and CMIP5 ensembles\ud have statistically indistinguishable distributions in these parameters. The ocean\ud heat uptake efficiency varies by a factor of two across the models, explaining\ud about 50% of the spread in ocean heat uptake in CMIP5 models with CO2 increasing at 1%/year. It correlates with the ocean global-mean vertical profiles\ud both of temperature and of temperature change, and comparison with observations suggests the models may overestimate ocean heat uptake and underestimate surface warming, because their stratification is too weak. The models\ud agree on the location of maxima of shallow ocean heat uptake (above 700 m) in\ud the Southern Ocean and the North Atlantic, and on deep ocean heat uptake (below 2000 m) in areas of the Southern Ocean, in some places amounting to 40%\ud of the top-to-bottom integral in the CMIP3 SRES A1B scenario. The Southern Ocean dominates global ocean heat uptake; consequently the eddy-induced\ud thickness diffusivity parameter, which is particularly influential in the Southern\ud Ocean, correlates with the ocean heat uptake efficiency. The thermal expansion\ud produced by ocean heat uptake is 0.12 m YJ−1, with an uncertainty of about\ud 10% (1 YJ = 1024 J).
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    • Andrews, T., J. M. Gregory, M. J. Webb, and K. E. Taylor (2012), Forcing, feedbacks and climate sensitivity in CMIP5 coupled atmosphere-ocean climate models, Geophys. Res. Lett., 39, L09712, doi:10.1029/ 2012GL051607.
    • Boé, J., A. Hall, and X. Qu (2009), Deep ocean heat uptake as a major source of spread in transient climate change simulations, Geophys. Res. Lett., 36, L22701, doi:10.1029/2009GL040845.
    • Boé, J., A. Hall, and X. Qu (2010), Correction to 'Deep ocean heat uptake as a major source of spread in transient climate change simulations,” Geophys. Res. Lett., 37, L17701, doi:10.1029/2010GL044726.
    • Church, J. A., N. J. White, L. F. Konikow, C. M. Domingues, J. G. Cogley, E. Rignot, J. M. Gregory, M. R. van den Broeke, A. J. Monaghan, and I. Velicogna (2011), Revisiting the Earth's sea-level and energy budgets from 1961 to 2008, Geophys. Res. Lett., 38, L18601, doi:10.1029/ 2011GL048794.
    • Forest, C. E., P. H. Stone, and A. P. Sokolov (2008), Constraining climate model parameters from observed 20th century changes, Tellus, Ser. A, 60, 911-920, doi:10.1111/j.1600-0870.2008.00346.x.
    • Gregory, J. M., and P. M. Forster (2008), Transient climate response estimated from radiative forcing and observed temperature change, J. Geophys. Res., 113, D23105, doi:10.1029/2008JD010405.
    • Kuhlbrodt, T., R. S. Smith, Z. Wang, and J. M. Gregory (2012), The influence of eddy parameterizations on the transport of the Antarctic Circumpolar Current in coupled climate models, Ocean Modell., 52-53, 1-8, doi:10.1016/j.ocemod.2012.04.006.
    • Levitus, S., et al. (2012), World ocean heat content and thermosteric sea level change (0-2000 m), 1955-2010, Geophys. Res. Lett., 39, L10603, doi:10.1029/2012GL051106.
    • Locarnini, R. A., A. V. Mishonov, J. I. Antonov, T. P. Boyer, and H. E. Garcia (2006), World Ocean Atlas 2005, 182 pp., NOAA, Silver Spring, Md.
    • Pardaens, A. K., J. M. Gregory, and J. A. Lowe (2011), A model study of factors influencing projected changes in regional sea level over the 21st century, Clim. Dyn., 36(9-10), 2015-2033, doi:10.1007/s00382-009- 0738-x.
    • Purkey, S. G., and G. C. Johnson (2010), Warming of global abyssal and deep Southern Ocean waters between the 1990s and 2000s: Contributions to global heat and sea level rise budgets, J. Clim., 23, 6336-6351, doi:10.1175/2010JCLI3682.1.
    • Russell, G. L., V. Gornitz, and J. R. Miller (2000), Regional sea level changes projected by the NASA/GISS atmosphere-ocean model, Clim. Dyn., 16, 789-797.
    • Stouffer, R. J., J. Russell, and M. J. Spelman (2006), Importance of oceanic heat uptake in transient climate change, Geophys. Res. Lett., 33, L17704, doi:10.1029/2006GL027242.
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