文章基本信息

标题：Calibration of the δ18O isotopic paleothermometer for central Greenland, using borehole temperatures
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作者：Cuffey Kurt M. ; Alley Richard B. ; Grootes Pieter M. 等
期刊名称：Journal of Glaciology
印刷版ISSN：0022-1430
电子版ISSN：1727-5652
出版年度：1994
卷号：40
期号：135
页码：341-349
DOI：10.1017/S0022143000007425
出版社：Cambridge University Press
摘要：We calibrate the δ 18 O paleothermometer for central Greenland using borehole temperatures, a thermal model forced by a measured δ 18 O record and a formal inverse technique. The calibration is determined mostly by temperature fluctuations of the last several centuries, including the Little Ice Age. Results are generally insensitive to model variables, including initial condition, basal boundary condition, parameterization of snow thermal properties, ice thickness and likely errors in temperature and isotope measurements. Results of this borehole calibration also seem to be in agreement with modern spatial gradients of δ 18 O and temperature. We suggest that calibrations of isotopic paleothermometers using borehole temperatures are a useful paleoclimate tool, because they are independent of spatial gradients and include the effects of prehistoric temperatures over ice sheets.