Climatological, Implications of Microparticle Concentrations in the Ice Core From “Byrd” Station, Western Antarctica
- 1 January 1975
- journal article
- Published by International Glaciological Society in Journal of Glaciology
- Vol. 14 (72) , 433-444
- https://doi.org/10.3189/s0022143000021948
Abstract
The concentration of microparticles in the 2 164 m long ice core from “Byrd” station Antarctica, varies cyclically. Highest concentrations of 0.65 μm diameter microparticles occur where oxygen-isotope studies show lowest paleotemperatures. The age of the bottom ice estimated from microparticle-concentration variations, assuming an annual cycle, is 27 000 years, much less than from oxygen-isotope studies. Les concentrations de microparticules tout au long des 2 164 m de la carotte de glace provenant de la station “Byrd”, Antarctique, varient périodiquement. La plus forte concentration en particules de diamètre 0,65 μm se produit lorsque l’étude de l’oxygène 18 Conduit aux plus basses températures pour le climat de l’époque. L’âge des couches de glace les plus anciennes, estimé à partir des variations de concentration des microparticules, serait de 27 000 ans, valeur très inférieure à celle obtenue par 18O. Die Konzentration der Mikroteilchen in der 2 164 m langen Eiskernprobe aus “Byrd”-Station in der Antarktis variiert zyklisch. Die höchsten Konzentrationen der Mikroteilchen von 0.65, μm, Durchmesser erscheinen dort, wo Sauerstoffisotopenuntersuchungen die niedrigsten Paleotemperaturen aufzeigen. Mit Annahme eines jährlichen Zyklus ist das aus Schwankungen der Mikroteilchen Konzentration geschätzte Alter des Bodeneises 27 000 Jahre, viel weniger als aus Sauerstoff isotopenuntersuchungen.Keywords
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