Showing papers by "Jérôme Chappellaz published in 1999"

Climate and atmospheric history of the past 420,000 years from the Vostok ice core, Antarctica

Abstract: The recent completion of drilling at Vostok station in East Antarctica has allowed the extension of the ice record of atmospheric composition and climate to the past four glacial–interglacial cycles. The succession of changes through each climate cycle and termination was similar, and atmospheric and climate properties oscillated between stable bounds. Interglacial periods differed in temporal evolution and duration. Atmospheric concentrations of carbon dioxide and methane correlate well with Antarctic air-temperature throughout the record. Present-day atmospheric burdens of these two important greenhouse gases seem to have been unprecedented during the past 420,000 years.

Phase Lag of Antarctic and Greenland Temperature in the Last Glacial and Link Between Co2 Variations and Heinrich Events

Abstract: Fundamental for the understanding of processes involved in climate change is the knowledge about its temporal and spatial evolution. Of special interest is the relation between high-latitude polar sites since they are a major component in climate change. Ice cores are a unique climate archive with a high temporal resolution which directly record the atmospheric composition of trace gases.