利用不同插值方法对青藏高原降水稳定同位素空间分布分析

doi:10.7522/j.issn.1000-0240.2015.0038

冰川冻土 ›› 2015, Vol. 37 ›› Issue (2): 351-359.doi: 10.7522/j.issn.1000-0240.2015.0038

利用不同插值方法对青藏高原降水稳定同位素空间分布分析

何由^1,2, 高晶², 姚檀栋², 丁永建¹, 辛儒³

1. 中国科学院寒区旱区环境与工程研究所, 甘肃兰州 730000;
2. 中国科学院青藏高原研究所环境变化与地表过程重点实验室, 北京 100101;
3. 北京有色金属研究总院, 北京 100088

收稿日期:2014-12-12 修回日期:2015-03-10 出版日期:2015-04-25 发布日期:2015-06-06
通讯作者: 姚檀栋, E-mail: tdyao@itpcas.ac.cn. E-mail:tdyao@itpcas.ac.cn
作者简介:何由(1984-), 男, 贵州六盘水人, 2011年于中国科学院青藏高原研究所获得硕士学位, 现为中科院寒区旱区环境与工程研究所在读博士研究生, 主要从事降水稳定同位素与环境方面的工作. E-mail: heyou@itpcas.ac.cn
基金资助:
中国科学院战略先导研究项目(XDB03030100); 国家自然科学基金项目(41471053; 41190080)资助

Spatial distribution of stable isotope in precipitation upon the Tibetan Plateau analyzed with various interpolation methods

HE You^1,2, GAO Jing², YAO Tandong², DING Yongjian¹, XIN Ru³

1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2. Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China;
3. General Research Institute for Nonferrous Metals, Beijing 100088, China

Received:2014-12-12 Revised:2015-03-10 Online:2015-04-25 Published:2015-06-06

摘要/Abstract

摘要：

利用稳定同位素大气环流模型模拟结果, 借鉴数据同化的思想, 运用Cressman插值法和最优插值法两种空间插值方法对青藏高原多年平均降水δ¹⁸O模拟结果进行客观订正, 并运用交叉验证方法检验空间插值的效果. 结果表明: 最优插值法订正的结果稍优于Cressman插值法; 对比订正结果与运用经验回归模型BW模拟结果表明, 最优插值所建立的降水稳定同位素的空间分布结果要优于BW模型模拟结果, 而Cressman插值方法订正的降水稳定同位素的空间分布结果与BW模型模拟的结果相当. 两种空间插值所得结果经过高程订正后, 对青藏高原南部的预测结果得到了明显改善.

关键词: 青藏高原, 稳定同位素, 空间插值, Cressman插值, 最优插值

Abstract:

The stable isotope (δ¹⁸O) on the Tibetan Plateau was interpolated by Cressman interpolation method and by optimum interpolation method after altitude correction. It is found that the performance of the optimum interpretation method is better than that of the Cressman interpretation method. Comprised with the results of regression model (BW model), the spatial distribution of δ¹⁸O interpolated by optimum interpretation method is also better. In the meanwhile, the δ¹⁸O spatial distribution on the southern Tibetan Plateau has been obviously improved through an altitude correction. However, the δ¹⁸O spatial distribution on the northern Tibetan Plateau has not been better after altitude correction.

Key words: Tibetan Plateau, stable isotope, objective analysis, Cressman interpolation, optimum interpolation

中图分类号:

P402

何由, 高晶, 姚檀栋, 丁永建, 辛儒. 利用不同插值方法对青藏高原降水稳定同位素空间分布分析[J]. 冰川冻土, 2015, 37(2): 351-359.

HE You, GAO Jing, YAO Tandong, DING Yongjian, XIN Ru. Spatial distribution of stable isotope in precipitation upon the Tibetan Plateau analyzed with various interpolation methods[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2015, 37(2): 351-359.

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利用不同插值方法对青藏高原降水稳定同位素空间分布分析

Spatial distribution of stable isotope in precipitation upon the Tibetan Plateau analyzed with various interpolation methods

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