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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 : Volume 5, Issue 2 (08/04/2009)

By Hargreaves, J. C.

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Book Id: WPLBN0004006114
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Title: 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 : Volume 5, Issue 2 (08/04/2009)  
Author: Hargreaves, J. C.
Volume: Vol. 5, Issue 2
Language: English
Subject: Science, Climate, Past
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2009
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Annan, J. D., & Hargreaves, J. C. (2009). 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 : Volume 5, Issue 2 (08/04/2009). Retrieved from http://www.ebooklibrary.org/


Description
Description: Global Change Projection Research Program, Research Institute for Global Change, JAMSTEC, 3173-25 Showa-machi, Kanazawa-ku, Yokohama City, Kanagawa, 236-0001, Japan. 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.

Summary
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

Excerpt
Chylek, P. and Lohmann, U.: Aerosol radiative forcing and climate sensitivity deduced from the Last Glacial Maximum to Holocene transition, Geophys. Res. Lett., 35, L04804, 1–5, 2008.; Claquin, T., Roelandt, C., Kohfeld, K E., Harrison, S P., Tegen, I., Prentice, I C., Balkanski, Y., Bergametti, G., Hansson, M., Mahowald, N., Rodhe, H., and Schulz, M.: Radiative forcing of climate by ice-age atmospheric dust, Clim. Dynam., 20, 193–202, 2003.; Crucifix, M.: Does the Last Glacial Maximum constrain climate sensitivity, Geophys. Res. Lett., 33, L18701, doi:10.1029/2006GL027137, 2006.; Ganopolski, A. and von Deimling, T.: Comment on Aerosol radiative forcing and climate sensitivity deduced from the Last Glacial Maximum to Holocene transition by Petr Chylek and Ulrike Lohmann, Geophys. Res. Lett., 35, L23703, doi:10.1029/2008GL033888, 2008.; Hansen, J., Lacis, A., Ruedy, R., Sato, M., and Wilson, H.: How sensitive is the world's climate?, Natl. Geog. Soc. Res. Exploration, 9, 142–158, 1993.; Hargreaves, J. C., Abe-Ouchi, A., and Annan, J. D.: Linking glacial and future climates through an ensemble of GCM simulations, Clim. Past, 3, 77–87, 2007.; Knutti, R. and Hegerl, G.: The equilibrium sensitivity of the Earth's temperature to radiation changes, Nature Geoscience, 1, 735–743, 2008.; Kucera, M., Rosell-Melé, A., Schneider, R., Waelbroeck, C., and Weinelt, M.: Multiproxy approach for the reconstruction of the glacial ocean surface (MARGO), Quaternary Sci. Rev., 24, 813–819, 2005.; Mix, A., Bard, E., and Schneider, R.: Environmental processes of the ice age: land, oceans, glaciers (EPILOG), Quaternary Sci. Rev., 20, 627–657, 2001.; Overpeck, J., Rind, D., Lacis, A., and Healy, R.: Possible role of dust-induced regional warming in abrupt climate change during the last glacial period, Nature, 384, 447–449, 1996.; Petit, J., Jouzel, J., Raynaud, D., Barkov, N., Barnola, J., Basile, I., Bender, M., Chappellaz, J., Davis, M., Delaygue, G., et~al.: Climate and atmospheric history of the past 420 000 years from the Vostok ice core, Antarctica, Nature, 399, 429–436, 1999.; Schneider von Deimling, T., Held, H., Ganopolski, A., and Rahmstorf, S.: Climate sensitivity estimated from ensemble simulations of glacial climate, Clim. Dynam., 27, 149–163, 2006.; Solomon, S., Qin, D., Manning, M., Chen, Z., et~al.: Climate change 2007: The physical science basis, Contribution of the Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, 2007.; Yoshimori, M., Yokohata, T., and Abe-Ouchi, A.: A Comparison of Climate Feedback Strength between CO2 Doubling and LGM Experiments, J Climate, doi:10.1175/2009JCLI2801.1, in press, 2009.

 

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