Articles | Volume 9, issue 4
https://doi.org/10.5194/tc-9-1601-2015
https://doi.org/10.5194/tc-9-1601-2015
Research article
 | 
20 Aug 2015
Research article |  | 20 Aug 2015

Estimation and calibration of the water isotope differential diffusion length in ice core records

G. van der Wel, H. Fischer, H. Oerter, H. Meyer, and H. A. J. Meijer

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Short summary
The diffusion of the stable water isotope signal during firnification of snow is a temperature-dependent process. Therefore, past local temperatures can be derived from the differential diffusion length. In this paper we develop a new method for determining this quantity and compare it with the existing method. Both methods are applied to a large number of synthetic data sets to assess the precision and accuracy of the reconstruction and to a section of the Antarctic EDML ice core record.