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 Global Change Projection Research Program, Research Institute for Global Change, JAMSTEC, 3173-25 Showa-machi, Kanazawa-ku, Yokohama City, Kanagawa, 236-0001, Japan
Received: 16 Oct 2008 – Published in Clim. Past Discuss.: 22 Dec 2008 – Published: 08 Apr 2009Abstract. 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, 5, 143-145, doi:10.5194/cp-5-143-2009, 2009.