A Review of Antarctic Surface Snow Isotopic Composition: Observations, Atmospheric Circulation, and Isotopic Modeling*
نویسندگان
چکیده
منابع مشابه
A Review of Antarctic Surface Snow Isotopic Composition: Observations, Atmospheric Circulation, and Isotopic Modeling
A database of surface Antarctic snow isotopic composition is constructed using available measurements, with an estimate of data quality and local variability. Although more than 1000 locations are documented, the spatial coverage remains uneven with a majority of sites located in specific areas of East Antarctica. The database is used to analyze the spatial variations in snow isotopic compositi...
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[1] Massive post-depositional processes alter the nitrate concentration in polar firn where the annual snow accumulation is low. This hinders a direct atmospheric interpretation of the ice core nitrate record. Fractionation of nitrate isotopes during post-depositional nitrate loss may allow estimating the amount of nitrate loss in the past. We measured dN of nitrate in two Antarctic surface cor...
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Nitrogen and oxygen isotopic constraints on the origin of atmospheric nitrate in coastal Antarctica J. Savarino, J. Kaiser, S. Morin, D. M. Sigman, and M. H. Thiemens Laboratoire de Glaciologie et Géophysique de l’Environnement (CNRS – UJF), 54 rue Molière BP96, St Martin d’Hères, 38402 France Princeton University, Department of Geosciences, Princeton, NJ 08544, USA University of California at ...
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Water stable isotopes in Greenland ice core data provide key paleoclimatic information, and have been compared with precipitation isotopic composition simulated by isotopically enabled atmospheric models. However, postdepositional processes linked with snow metamorphism remain poorly documented. For this purpose, monitoring of the isotopic composition (δ18O, δD) of near-surface water vapor, pre...
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ژورنال
عنوان ژورنال: Journal of Climate
سال: 2008
ISSN: 1520-0442,0894-8755
DOI: 10.1175/2007jcli2139.1