Analysis of snow feedbacks in 14 general circulation models
| Autor: | Jean-François Royer, Andrew A. Lacis, D. A. Sheinin, Karl E. Taylor, A. P. Sokolov, D. A. Dazlich, A. D. Del Genio, Robert D. Cess, U. Schlese, J. P. Blanchet, Robert Colman, David A. Randall, Gerald L. Potter, V. P. Meleshko, P. M. Norris, B. J. McAvaney, Erich Roeckner, I. Yagai, J.-J. Morcrette, R. T. Wetherald, E. Keup, H. Le Treut, L. Rikus, Jean-François Mahfouf, Xin-Zhong Liang, S. Chalita, Minghua Zhang |
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| Rok vydání: | 1994 |
| Předmět: |
Atmospheric Science
Ecology Mathematical model Atmospheric circulation Cloud cover Paleontology Soil Science Climate change Forestry Aquatic Science Albedo Oceanography Snow Atmospheric sciences Atmospheric temperature Geophysics Space and Planetary Science Geochemistry and Petrology Snowmelt Climatology Earth and Planetary Sciences (miscellaneous) Environmental science Earth-Surface Processes Water Science and Technology |
| Zdroj: | Journal of Geophysical Research. 99:20757 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/94jd01633 |
| Popis: | Snow feedbacks produced by 14 atmospheric general circulation models have been analyzed through idealized numerical experiments. Included in the analysis is an investigation of the surface energy budgets of the models. Negative or weak positive snow feedbacks occurred in some of the models, while others produced strong positive snow feedbacks. These feedbacks are due not only to melting snow, but also to increases in boundary temperature, changes in air temperature, changes in water vapor, and changes in cloudiness. As a result, the net response of each model is quite complex. We analyze in detail the responses of one model with a strong positive snow feedback and another with a weak negative snow feedback. Some of the models include a temperature dependence of the snow albedo, and this has significantly affected the results. |
| Databáze: | OpenAIRE |
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