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冰川冻土 ›› 2013, Vol. 35 ›› Issue (1): 1-9.doi: 10.7522/j.issn.1000-0240.2013.0001

• 冰冻圈与全球变化 •    下一篇

祁连山区黑河上游俄博岭多年冻土区活动层碳储量研究

牟翠翠1, 张廷军2,3, 曹斌2, 万旭东2, 彭小清1, 程国栋1   

  1. 1. 中国科学院 寒区旱区环境与工程研究所 冻土工程国家重点实验室, 甘肃 兰州 730000;
    2. 兰州大学 资源与环境学院, 甘肃 兰州 730000;
    3. National Snow and Ice Data Center, University of Colorado, Boulder Colorado 80309-0449, USA
  • 收稿日期:2012-08-12 修回日期:2012-11-07 出版日期:2013-02-25 发布日期:2013-07-22
  • 作者简介:牟翠翠(1984-),女,山东烟台人,2011年在上海大学获硕士学位,现为在读博士研究生,主要从事多年冻土碳循环研究工作.E-mail:cuicui031200@gmail.com
  • 基金资助:

    国家自然科学基金项目"黑河流域冻土特征及其对生态-水文过程的响应"(Y02C671001);国家自然科学基础人才培养基金项目"冰川冻土学特殊学科点"(Y011531001)资助

Study of the Organic Carbon Storage in the Active Layer of Permafrost over the Eboling Mountain in the Upper Reaches of the Heihe River in the Eastern Qilian Mountains

MU Cui-cui1, ZHANG Ting-jun2,3, CAO Bin2, WAN Xu-dong2, PENG Xiao-qing1, CHENG Guo-dong1   

  1. 1. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China;
    2. College of Earth and Environmental Sciences, Lanzhou University, Lanzhou Gansu 730000, China;
    3. National Snow and Ice Data Center, University of Colorado, Boulder Colorado 80309-0449, USA
  • Received:2012-08-12 Revised:2012-11-07 Online:2013-02-25 Published:2013-07-22

摘要:

为了探索在全球气候变化背景下多年冻土区碳储量现状, 通过野外实地勘探和室内实验, 对黑河上游俄博岭多年冻土区地貌特征及不同海拔活动层内的碳储量进行考察和估算. 结果表明: 黑河上游俄博岭冰缘现象显著, 土壤季节冻融过程活跃, 且活动层中碳储量丰富. 在研究区约2.5×106 m2 的范围内, 活动层平均厚度约为1.1 m, 活动层土壤有机质平均含量约为72.1%, 碳储量估算约为1.57 Mt C. 活动层不同深度处有机质含量呈现不同的变化规律. 随着活动层深度增加, 土壤有机质的含量逐渐降低, 在多年冻土上限附近有机质含量较高. 另外, 活动层有机质含量随着海拔和土壤含水量的不同而变化, 同时多年冻土区微地形和地质条件也对有机质含量具有重要的影响.

关键词: 活动层, 气候变暖, 有机质含量, 碳储量估算

Abstract:

In order to understand the carbon pools in permafrost under the changing climate, the organic carbon storage in the active layers and its geomorphologic features at different elevations were investigated in the Eboling Mountain in the upper reaches of the Heihe River by both field exploration and laboratory experiment. The results indicated that there were significant periglacial phenomena and active seasonal freeze-thaw processes in the Eboling Mountain. The content of organic carbon in the active layer was high. The average depth of the active layer in the study region was 1.1 m. The content of organic matter of the soils in the active layer was about 72.1% on average for the study region. Consequently, carbon storage was estimated to be about 1.57 Mt C in the studied region of 2.5 km2 in area. Organic content varied with depths in the active layer. The organic content decreased with depth, but reached a high value in the vicinity of the permafrost table. While the elevation and soil moisture content control the organic carbon content of soil, micro-topography and lithology (soil types) have great effect on the organic content of soil in the active layer.

Key words: active layer, global warming, organic content, carbon storage estimation

中图分类号: 

  • P642.14