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A new spatial distribution map of δ 18 O in Antarctic surface snow
Author(s) -
Wang Yetang,
Hou Shugui,
MassonDelmotte Valérie,
Jouzel Jean
Publication year - 2009
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2008gl036939
Subject(s) - snow , elevation (ballistics) , latitude , digital elevation model , geology , standard deviation , spatial distribution , climatology , geodesy , remote sensing , geomorphology , physics , statistics , mathematics , astronomy
We developed a gridded map of surface Antarctic snow isotopic composition using a recently compiled database and the modified Bowen and Wilkinson (2002) model using latitude and elevation as the primary predictors while also incorporating regional and local deviations based on available isotopic data. The map was generated using a 1‐km digital elevation model grid data as the model input. The average of the absolute deviations between observations and predictions was about 0.8‰, and the standard deviation is 0.9‰. The resulting δ 18 O patterns reproduced correctly spatial isotopic gradients with respect to geographical characteristics, as well as climatic features.