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Tibetan Plateau Geladaindong black carbon ice core record (1843-1982):Recent increases due to higher emissions and lower snow accumulation

机译:青藏高原格拉丹东黑碳冰芯记录(1843-1982年):由于排放量增加和积雪减少,最近的增加

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摘要

Black carbon(BC) deposited on snow and glacier surfaces can reduce albedo and lead to accelerated melt. An ice core recovered from Guoqu glacier on Mt. Geladaindong and analyzed using a Single Particle Soot Photometer(SP2) provides the ?rst long-term(1843-1982) record of BC from the central Tibetan Plateau. Post 1940 the record is characterized by an increased occurrence of years with above average BC, and the highest BC values of the record. The BC increase in recent decades is likely caused by a combination of increased emissions from regional BC sources, and a reduction in snow accumulation. Guoqu glacier has received no net ice accumulation since the 1980 s, and is a potential example of a glacier where an increase in the equilibrium line altitude is exposing buried high impurity layers. That BC concentrations in the uppermost layers of the Geladaindong ice core are not substantially higher relative to deeper in the ice core suggests that some of the BC that must have been deposited on Guoqu glacier via wet or dry deposition between 1983 and 2005 has been removed from the surface of the glacier, potentially via supraglacial or englacial meltwater.

著录项

  • 来源
    《气候变化研究进展(英文版)》 |2016年第3期|132-138|共7页
  • 作者单位

    Department of Geological Sciences, Central Washington University, Ellensburg 98926, USA;

    Department of Geological Sciences, Central Washington University, Ellensburg 98926, USA;

    State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;

    Key Laboratory of Tibetan Environment Changes and Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101,China;

    Climate Change Institute, University of Maine, Orono 04469, USA;

    Climate Change Institute, University of Maine, Orono 04469, USA;

  • 收录信息 中国科学引文数据库(CSCD);
  • 原文格式 PDF
  • 正文语种 eng
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  • 入库时间 2022-08-19 03:58:04
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