Antarctic winter tropospheric warming—the potential role of polar stratospheric clouds, a sensitivity study
2009; Wiley; Volume: 10; Issue: 4 Linguagem: Inglês
10.1002/asl.237
ISSN1530-261X
AutoresTom Lachlan‐Cope, W. M. Connolley, John Turner, H. K. Roscoe, Gareth J. Marshall, Steve Colwell, M. Höpfner, William Ingram,
Tópico(s)Atmospheric and Environmental Gas Dynamics
ResumoAbstract Over the last 30 years, Antarctic mid‐tropospheric temperatures in winter have increased by 0.5 K per decade, the largest regional tropospheric warming observed. Over this period, amounts of polar stratospheric cloud(PSC) have also increased, as rising CO 2 concentrations cooled the stratosphere. By imposing an idealisation of these increases in PSC within the radiation scheme of an atmosphere‐only general circulation model, we find that they could have contributed to the observed warming. The present generation of global climate models do not properly represent PSCs, and so these results demonstrate the need to improve the representation of PSCs. Copyright © 2009 Royal Meteorological Society and Crown Copyright
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