INSTITUTO ARGENTINO DE NIVOLOGIA, GLACIOLOGIA Y CIENCIAS AMBIENTALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Paleopermafrost distribution Downscaled in South America and Northeastern Asia. Comparison of the GCM-based maps with the observation
SAITO, K.; BIGELOW, N; MARCHENKO, S.; ROMANOVSKY, V.; WALSH, J.; YOSHIKAWA, K. ; D. TROMBOTTO
Congreso; Tenth International Conference on Permafrost; 2012
Changes in the distribution of frozen ground (permafrost and seasonally-frozen ground) are an important issue on a global context as it is widely recognized that the state and fate of the cryosphere is a key for a better projection of and mitigation against global change in this century. However, understanding the attribution and consequence of frozen ground changes needs a longer perspective, like the Quaternary, due to the inherent long time scale of the processes. There have been an accumulation of field materials providing the past periglacial processes in many areas. The temporal evolution of frozen ground under specific local conditions in the Quaternary has also been examined conceptually or numerically. The spatial extent of these Works is, however, rather limited. Improvement of the large-scale climate or earth system models (denoted as GCMs here) in the latest decade, has led to intensive use in global-scale investigations on the cryosphere or on the paleoclimate [e.g., PMIP2, Braconnot et al. 2007], but the models remain insufficient in terms of implemented physical processes or the horizontal resolution. The former limits the physical credibility of the model outputs, and the latter hinders direct comparison between the model results and he observationally-derived evidences.