Mathematics – Logic
Scientific paper
Jun 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.2305s&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 12, p. 2305-2308
Mathematics
Logic
2
Geochemistry: Low-Temperature Geochemistry, Hydrology: Limnology, Meteorology And Atmospheric Dynamics: Paleoclimatology, Oceanography: Biological And Chemical: Stable Isotopes
Scientific paper
The penultimate temperate period, 127-110 ka before present (BP), bracketed by abrupt shifts of the global climate system initiating and terminating it, is considered as an analogue of the Holocene because of a similar low global ice-volume. Ice core records as well as continental and marine records exhibit conflicting evidence concerning the climate variability within this period, the Last Interglacial. We present, for the first time, a high-resolution record of oxygen isotopes in diatom opal of the Last Interglacial obtained from the Ribains Maar in France (44° 50'09'' N 3° 49'16''E). Our results indicate that the Last Interglacial in southwestern Europe was generally a period of climatic stability. The record shows that the temperate period was initiated by an abrupt warm event followed midway by a minor climatic transition to a colder climate. An abrupt isotopic depletion that occurs simultaneously with abrupt changes in pollen and diatom assemblages marks the end of the temperate period, and is correlative with the Melisey I stadial. Variations in the isotopic composition of lake-water related to the isotopic composition of precipitation and evaporation dominate the biogenic opal oxygen isotope record.
Andrieu Valerie
Battarbee Rick
de Beaulieu Jacques-Louis
Reille Maurice
Rietti-Shati Miri
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