The Patagonian Icefields

The majesty of the icefields is beyond description. He who has been fortunate to be there once, remains bound forever. To a theoretical physicist working on black holes the icefields produce a familiar vertigo, the instinctive certainty of being confronted with something so simple and beautifully extreme that it must be of importance. The meeting whose proceedings are contained in this volume was conducted onboard of a vessel that went to the icefields, and the participants could literally set foot on them. It was expected that, for those who had not been there before, this would constitute a ritual of initiation. And so it did. For this reason we like to refer to the meeting as an expedition because, although it did not have the hardship, it had the spirit. After this foundational expedition there have been two others, this time both with spirit and hardship, one from Chile and one from Argentina. At the moment of this writing, a fourth, full-fledged airborne expedition to the icefields is about to depart from Valdivia. Many of the people of many nations who were on board of the Aquiles will take part in it. We look forward to its results, and to an ongoing exciting scientific adventure. Claudio Teitelboim Director, Centro de Estudios Cientfficos Valdivia, September 2001 v ACKNOWLEDGMENTS This volume is the result of the effort and generosity of many people and institutions.

Contenu

Preface. Acknowledgments. Introduction. List of Participants. Color Plates. Biology. 1. Glacier Ecosystem and Biological Ice Core Analysis; S. Kohshima, et al. 2. Isolation and Identification of Bacteria from Ancient and Modern Ice Cores; B.C. Christner, et al. 3. Perspectives for DNA Studies on Polar Ice Cores; A.J. Hansen, E. Willerslev. Climate and Paleoclimate. 4. Meteorological and Climatological Aspects of the Southern Patagonia Icefield, Patagonia; J.F. Carrasco, et al. 5. Western Patagonia: A Key Area for Understanding Quaternary Paleoclimate at Southern Mid-Latitudes; P.I. Moreno. 6. Late Pleistocene and Holocene Glacier Fluctuations in the Mendoza Andes, Argentina; L.E. Espizúa. Glaciology. 7. Current Knowledge of the Southern Patagonia Icefield; G. Casassa, et al. 8. The Southern Patagonia Icefield Mass Balance; J.C. Leiva. 9. Glacier Mass Balance and Climate in the South American Andes; G. Kaser. 10. Ice Thickness Measurements on the Southern Patagonia Icefield; A. Rivera, G. Casassa. Ice Coring. 11. Locating a Drilling Site on the Patagonian Icefield; N. Gundestrup. 12. On the Potential to Retrieve Climatic and Environmental Information From Ice Core Sites Suffering Periodical Melt, with Specific Assessment of the Southern Patagonia Icefield; V. Pohjola. 13. Argentine Program on Climate and Environmental Studies by Means of Ice Cores; A.J. Aristarain. 14. Firn-Core Drilling Operational at Tyndall Glacier, Southern Patagonia Icefield; M.-A. Godoi, et al. 15.First Results of a Palaeoatmospheric Chemistry and Climate Study of Cerro Tapado Glacier, Chile; P. Ginot, et al. 16. Interpreting Climate Signals from a Shallow Equatorian Core: Antisana, Ecuador; M.W. Williams, et al. 17. Potential Application of Methodologies for Studying Atmospheric Aerosols, in the Study of Climatic and Environmental Information from Ice Cores; M. Préndez. Appendix. Glossary. Index.