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冰川冻土 ›› 2018, Vol. 40 ›› Issue (2): 279-287.doi: 10.7522/j.issn.1000-0240.2018.0032

• 冰冻圈与全球变化 • 上一篇    下一篇

基于Noah陆面过程模型模拟青藏高原植被和土壤特征对多年冻土的影响

吴小波1,2, 南卓铜3, 王维真1, 赵林1   

  1. 1. 中国科学院 西北生态环境资源研究院, 甘肃 兰州 730000;
    2. 中国科学院大学, 北京 100049;
    3. 南京师范大学 地理科学学院, 江苏 南京 210023
  • 收稿日期:2017-09-28 修回日期:2018-01-05 出版日期:2018-04-25 发布日期:2018-07-02
  • 通讯作者: 南卓铜,E-mail:nanzt@njnu.edu.cn E-mail:nanzt@njnu.edu.cn
  • 作者简介:吴小波(1985-),男,重庆万州人,2011在中国科学院新疆生态与地理研究所获硕士学位,现为中国科学院西北生态环境资源研究院在读博士研究生,从事陆面过程模型与遥感GIS应用研究.E-mail:wavelet2008@163.com
  • 基金资助:
    国家重点研发计划项目(2017YFA0603603);国家自然科学基金项目(41671373;41671055)资助

Simulation of the impact of vegetation and soil characteristics on permafrost over the Tibetan Plateau based on the Noah land surface model

WU Xiaobo1,2, NAN Zhuotong3, WANG Weizhen1, ZHAO Lin1   

  1. 1. Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. School of Geography Science, Nanjing Normal University, Nanjing 210023, China
  • Received:2017-09-28 Revised:2018-01-05 Online:2018-04-25 Published:2018-07-02

摘要: 针对青藏高原植被稀疏、土壤颗粒较粗糙的特征,基于Noah陆面过程模型(LSM),模拟了植被和土壤对整个高原多年冻土分布和关键属性特征(包括活动层厚度和年平均地温)的影响,并通过野外调查数据对模拟结果进行了评估。结果表明:在考虑稀疏植被和粗糙土壤后,改进的Noah LSM对青藏高原多年冻土分布和属性的模拟性能都有所改善;多年冻土面积由原始Noah模型模拟的1.216×106 km2减少到1.113×106 km2,模拟的空间差异主要出现在多年冻土与季节冻土的过渡区及高原南部的岛状多年冻土区;模拟的高原平均活动层厚度由原始Noah模型模拟的2.55 m增加到2.92 m,年平均地温也由-2.17℃增加到-1.65℃。总之,青藏高原稀疏植被和粗糙土壤对多年冻土有重要影响。

关键词: 青藏高原, 多年冻土, 植被, 土壤, 陆面过程模型, Noah

Abstract: The sparse vegetation and coarse soils are widely distributed on the Tibetan Plateau. In this study, the impacts of vegetation and soil characteristics on permafrost distribution were simulated, as well as the key characteristics including active layer thickness and mean annual ground temperature on the entire plateau, based on the Noah land surface model (LSM). The simulation results were assessed by comparing with field survey data. The results showed that the Noah LSM, taking the sparse vegetation and coarse soil into account, is capable of modelling permafrost over the plateau. The permafrost area was reduced from 1.216×106 km2 to 1.113×106 km2 after considering the impacts of sparse vegetation and coarse soils. The simulated spatial differences mainly appeared in the transitional areas between permafrost and seasonally frozen soil and the patchy permafrost areas in the southern part of the plateau. The simulated active layer thickness averaged over the plateau and mean annual ground temperature were increased from 2.55 m to 2.92 m and from -2.17℃ to -1.65℃, respectively. These results indicate that the sparse vegetation and coarse soils have great impact on permafrost over the plateau.

Key words: Tibetan Plateau, permafrost, vegetation, soil, land surface model, Noah

中图分类号: 

  • P642.14