Clim. Past Discuss., 4, 1319-1326, 2008
www.clim-past-discuss.net/4/1319/2008/
doi:10.5194/cpd-4-1319-2008
© Author(s) 2008. This work is distributed
under the Creative Commons Attribution 3.0 License.
Review Status
This discussion paper has been under review for the journal Climate of the Past (CP). Please refer to the corresponding final paper in CP.
Comment on "Aerosol radiative forcing and climate sensitivity deduced from the Last Glacial Maximum to Holocene transition", by P. Chylek and U. Lohmann, Geophys. Res. Lett., 2008
J. C. Hargreaves and J. D. Annan
Frontier Research Centre for Global Change, JAMSTEC 3173-25 Showamachi, Kanazawa-ku, Yokohama City, Kanagawa 236-0001, Japan

Abstract. In a recent paper, Chylek and Lohmann (2008) used data from the Vostok ice core together with simple energy balance arguments to simultaneously estimate both the dust radiative forcing effect and the climate sensitivity, generating surprisingly high and low values for these respective parameters. However, their results depend critically on their selection of single unrepresentative data points from time series which exhibit a large amount of short-term variability, and are highly unstable with respect to other arbitrarily selected data points. When temporal averages are used in accordance with accepted norms within the paleoclimate community, the results obtained are entirely unremarkable and in line with previous analyses.

Citation: Hargreaves, J. C. and Annan, J. D.: Comment on "Aerosol radiative forcing and climate sensitivity deduced from the Last Glacial Maximum to Holocene transition", by P. Chylek and U. Lohmann, Geophys. Res. Lett., 2008, Clim. Past Discuss., 4, 1319-1326, doi:10.5194/cpd-4-1319-2008, 2008.
 
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