Determination of the climate and its variability in the Artigas Antarctic Scientific Base

Dr. Madeleine Renom, Facultad de Ciencias

Currently there is a great interest in the study of variability and climate change in the Antarctic continent. On the one hand, future climate projections indicate that Antarctica would be particularly sensitive to anthropogenic forcing. On the other, the observations indicate a great inhomogeneity in the climate trends observed since 1950.

The warm-continental pattern of the cold continent that emerges in several studies of surface temperature Antarctica has been mainly attributed to the Southern Hemisphere Annular Mode (SAM) (Schneider et al., 2006; Monaghan et al., 2008). SAM changes the intensity and direction of the geostrophic flow around the continent, implying stronger northwestern winds (which act to promote a warming of the peninsula) while weakening the turbulent exchanges of sensible heat on much of the continent Cooling in said region). On the other hand different studies have demonstrated the relation that this mode of variability has with the precipitations and the extremes of temperature in South America. The overall objective of the proposal is to determine the climate and its variability based on the observed data from the meteorological stations located in the Artigas Antarctic Scientific Base. The available meteorological variables will be analyzed in order to characterize the Antarctic climate. Monthly and annual climatologies will be generated and variability will be studied in a range of time scales ranging from inter-seasonal to interdecadal and long-term trends. It is also planned to analyze the occurrence of extreme events and detect some type of climatic tendency or sign of climatic change of anthropic origin.