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Abstract
Pollen collected from snow samples on the Quelccaya Ice Cap in 2000 and 2001 reveals significant interannual variability in pollen assemblage, concentration, and provenance. Samples from 2000, a La Niña year, contain high pollen concentrations and resemble samples from the Andean forests (Yungas) to the east. Samples from 2001, an El Niño year, contain fewer pollen and resemble those from the Altiplano. We suggest that varying wind patterns under different El Niño/Southern Oscillation (ENSO) conditions may affect the processes of pollen transport over the Altiplano and on the ice cap, although confounding variables such as flowering phenology and sublimation should also be considered
*The authors would like to thank Lonnie G. Thompson, Keith R. Mountain, and Jason K. Blackburn for their help in the field, as well as Jocelyne C. Bourgeois and Robert V. Rohli for useful discussion. A special thanks to Mary Lee Eggart for cartographic assistance. This research was jointly supported by the Geography and Regional Science Program, the Paleoclimatic Program, and the Americas Program of the National Science Foundation (NSF grants BCS-9906002, BCS-0117338, and BCS-0217321). Additional support for this project came from doctoral dissertation grants from the Geological Society of America, the Association of American Geographers, the Sigma-Xi National Research Society, and the Department of Geography and Anthropology at Louisiana State University.
Notes
*The authors would like to thank Lonnie G. Thompson, Keith R. Mountain, and Jason K. Blackburn for their help in the field, as well as Jocelyne C. Bourgeois and Robert V. Rohli for useful discussion. A special thanks to Mary Lee Eggart for cartographic assistance. This research was jointly supported by the Geography and Regional Science Program, the Paleoclimatic Program, and the Americas Program of the National Science Foundation (NSF grants BCS-9906002, BCS-0117338, and BCS-0217321). Additional support for this project came from doctoral dissertation grants from the Geological Society of America, the Association of American Geographers, the Sigma-Xi National Research Society, and the Department of Geography and Anthropology at Louisiana State University.