Mathias Vuille

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[1] The influence of the Asian monsoon on the dO composition of precipitation is investigated on the basis of the ECHAM-4 Atmospheric General Circulation Model (AGCM), fitted with stable isotopic tracers. The model is forced with prescribed sea surface temperatures (SST) over the last few decades of the 20th century. The simulated climate and climate–stable(More)
The large-scale controls on the climate of the South American Altiplano are investigated using local observations, reanalysis data and general circulation model experiments. The objective is to gain understanding of causes of climate variability and climate change by relating mechanisms that operate on timescales ranging from the intraseasonal to the(More)
The atmospheric circulation over the Bolivian Altiplano during composite WET and DRY periods and during HIGH and LOW index phases of the Southern Oscillation was investigated using daily radiosonde data from Antofagasta (Chile), Salta (Argentina), Lima (Peru) and La Paz (Bolivia), daily precipitation data from the Bolivian/Chilean border between 18° and(More)
The main spatiotemporal modes of seasonal precipitation and temperature variability in the Andes of Ecuador (18N–48S) and their relation to tropical Pacific and Atlantic sea surface temperature anomalies (SSTAs) between 1963–92 are identified based on rotated principal component analysis and cross-correlation techniques. Outgoing longwave radiation(More)
References and Notes 1. Special Issue on Cassini at Saturn, Science 307 (25 February 2005). 2. J. J. Lissauer, J. N. Cuzzi, in Protostars and Planets II, D. C. Black, M. S. Matthews, Eds. (Univ. of Arizona Press, Tucson, AZ, 1985), pp. 920–958. 3. Special Issue on Disks in Space, Science 307 (7 January 2005). 4. M. S. Tiscareno et al., paper presented at(More)
During the last glacial period, large millennial-scale temperature oscillations--the 'Dansgaard/Oeschger' cycles--were the primary climate signal in Northern Hemisphere climate archives from the high latitudes to the tropics. But whether the influence of these abrupt climate changes extended to the tropical and subtropical Southern Hemisphere, where changes(More)
The South American Summer Monsoon (SASM) is a prominent feature of summertime climate over South America and has been identified in a number of paleoclimatic records from across the continent, including records based on stable isotopes. The relationship between the stable isotopic composition of precipitation and interannual variations in monsoon strength,(More)
Linear trend analysis of observational data combined with model diagnostics from an atmospheric general circulation model are employed to search for potential mechanisms related to the observed glacier retreat in the tropical Andes between 1950 and 1998. Observational evidence indicates that changes in precipitation amount or cloud cover over the last(More)