极地研究

极地研究 ›› 1999, Vol. 10 ›› Issue (1-English): 19-24.

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Isotopic analysis of the snow cover at an alpine glacier as an indicator of local climatic variations and isotopic homogenization processes

 He Yuanqing1 and Theakstone WH2   

  1. 1 Laboratory of Ice Core and Cold Region Environment, LIGG, CAS, Lanzhou 730000, China
    2 Department of Geography, University of Manchester, Manchester M13 9PL, England
  • 出版日期:1949-03-30 发布日期:1949-03-30
  • 通讯作者: He Yuanqing

Isotopic analysis of the snow cover at an alpine glacier as an indicator of local climatic variations and isotopic homogeni zation processes

 He Yuanqing1 and Theakstone WH2   

  1. 1 Laboratory of Ice Core and Cold Region Environment, LIGG, CAS, Lanzhou 730000, China;
    2 Department of Geography, University of Manchester, Manchester M13 9PL, England
  • Online:1949-03-30 Published:1949-03-30
  • Contact: He Yuanqing

PDF (PC)

843

被引次数

2

摘要：

Stratigraphic variations of 18O/16O ratios of winter accumulated snow at an alpine temperate glacier correspond to temporal patterns of local climatic variations. Although the snow is influenced by percolation and homogenization processes, the isotope stratigraphy in the glacier's accumulation area is not destroyed during the first part of summer. Below the equilibrium line altitude, rapid melting results in isotopic homogenization. Variation of δ18O values in the firn are relatively small.

关键词: isotopic analysis, snow cover, alpine glacier, climatic change

Abstract:

Stratigraphic variations of 18O/16O ratios of winter accumulated snow at an alpine temperate glacier correspond to temporal patterns of local climatic variations. Although the snow is influenced by percolation and homogenization processes, the isotope stratigraphy in the glacier's accumulation area is not destroyed during the first part of summer. Below the equilibrium line altitude, rapid melting results in isotopic homogenization. Variation of δ18O values in the firn are relatively small.

Key words: isotopic analysis, snow cover, alpine glacier, climatic change