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An Improved Method for Modeling Spatial Distribution of δD in Surface Snow over Antarctic Ice Sheet

WANG Yetang HOU Shugui Bjorn GRIGHOLM SONG Linlin

WANG Yetang, HOU Shugui, Bjorn GRIGHOLM, SONG Linlin. An Improved Method for Modeling Spatial Distribution of δD in Surface Snow over Antarctic Ice Sheet[J]. 中国地理科学, 2009, 19(2): 120-125. doi: 10.1007/s11769-009-0120-2
引用本文: WANG Yetang, HOU Shugui, Bjorn GRIGHOLM, SONG Linlin. An Improved Method for Modeling Spatial Distribution of δD in Surface Snow over Antarctic Ice Sheet[J]. 中国地理科学, 2009, 19(2): 120-125. doi: 10.1007/s11769-009-0120-2
WANG Yetang, HOU Shugui, Bjorn GRIGHOLM, SONG Linlin. An Improved Method for Modeling Spatial Distribution of δD in Surface Snow over Antarctic Ice Sheet[J]. Chinese Geographical Science, 2009, 19(2): 120-125. doi: 10.1007/s11769-009-0120-2
Citation: WANG Yetang, HOU Shugui, Bjorn GRIGHOLM, SONG Linlin. An Improved Method for Modeling Spatial Distribution of δD in Surface Snow over Antarctic Ice Sheet[J]. Chinese Geographical Science, 2009, 19(2): 120-125. doi: 10.1007/s11769-009-0120-2

An Improved Method for Modeling Spatial Distribution of δD in Surface Snow over Antarctic Ice Sheet

doi: 10.1007/s11769-009-0120-2
基金项目: Under the auspices of National Natural Science Foundation of China (No. 40825017, 40576001);100 Talents Project of Chinese Academy of Sciences;National Key Technologies R&D Program of China (No. 2006BAB18B01)
详细信息
    通讯作者:

    WANG Yetang.E-mail:wangyetang@163.com

An Improved Method for Modeling Spatial Distribution of δD in Surface Snow over Antarctic Ice Sheet

Funds: Under the auspices of National Natural Science Foundation of China (No. 40825017, 40576001);100 Talents Project of Chinese Academy of Sciences;National Key Technologies R&D Program of China (No. 2006BAB18B01)
  • 摘要: Using the recent compilation of the isotopic composition data of surface snow of Antarctic ice sheet, we proposed an improved interpolation method of δD, which utilizes geographical factors (i.e., latitude and altitude) as the primary predictors and incorporates inverse distance weighting (IDW) technique. The method was applied to a high-resolution digital elevation model (DEM) to produce a grid map of multi-year mean δD values with 1km spatial resolution for Antarctica. The mean absolute deviation between observed and estimated data in the map is about 5.4‰, and the standard deviation is 9‰. The resulting δD pattern resembles well known characteristics such as the depletion of the heavy isotopes with increasing latitude and distance from coast line, but also reveals the complex topographic effects.
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  • 收稿日期:  2008-10-27
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  • 刊出日期:  2009-06-20

An Improved Method for Modeling Spatial Distribution of δD in Surface Snow over Antarctic Ice Sheet

doi: 10.1007/s11769-009-0120-2
    基金项目:  Under the auspices of National Natural Science Foundation of China (No. 40825017, 40576001);100 Talents Project of Chinese Academy of Sciences;National Key Technologies R&D Program of China (No. 2006BAB18B01)
    通讯作者: WANG Yetang.E-mail:wangyetang@163.com

摘要: Using the recent compilation of the isotopic composition data of surface snow of Antarctic ice sheet, we proposed an improved interpolation method of δD, which utilizes geographical factors (i.e., latitude and altitude) as the primary predictors and incorporates inverse distance weighting (IDW) technique. The method was applied to a high-resolution digital elevation model (DEM) to produce a grid map of multi-year mean δD values with 1km spatial resolution for Antarctica. The mean absolute deviation between observed and estimated data in the map is about 5.4‰, and the standard deviation is 9‰. The resulting δD pattern resembles well known characteristics such as the depletion of the heavy isotopes with increasing latitude and distance from coast line, but also reveals the complex topographic effects.

English Abstract

WANG Yetang, HOU Shugui, Bjorn GRIGHOLM, SONG Linlin. An Improved Method for Modeling Spatial Distribution of δD in Surface Snow over Antarctic Ice Sheet[J]. 中国地理科学, 2009, 19(2): 120-125. doi: 10.1007/s11769-009-0120-2
引用本文: WANG Yetang, HOU Shugui, Bjorn GRIGHOLM, SONG Linlin. An Improved Method for Modeling Spatial Distribution of δD in Surface Snow over Antarctic Ice Sheet[J]. 中国地理科学, 2009, 19(2): 120-125. doi: 10.1007/s11769-009-0120-2
WANG Yetang, HOU Shugui, Bjorn GRIGHOLM, SONG Linlin. An Improved Method for Modeling Spatial Distribution of δD in Surface Snow over Antarctic Ice Sheet[J]. Chinese Geographical Science, 2009, 19(2): 120-125. doi: 10.1007/s11769-009-0120-2
Citation: WANG Yetang, HOU Shugui, Bjorn GRIGHOLM, SONG Linlin. An Improved Method for Modeling Spatial Distribution of δD in Surface Snow over Antarctic Ice Sheet[J]. Chinese Geographical Science, 2009, 19(2): 120-125. doi: 10.1007/s11769-009-0120-2
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