X img

官方微信

img

群号:冰川冻土交流群

QQ群:218834310

高级检索
作者投稿 专家审稿 编辑办公 编委办公 主编办公

冰川冻土 ›› 2020, Vol. 42 ›› Issue (3): 1036-1045.doi: 10.7522/j.issn.1000-0240.2020.0076

• 冰冻圈生态学 • 上一篇    下一篇

基于地理加权回归的青藏高原季节冻土区土壤有机碳空间分布研究

王栋1,2(), 吴晓东1(), 魏献花3, 吴通华1, 赵林4, 李韧1, 胡国杰1, 邹德富1, 李旺平5   

  1. 1.中国科学院 西北生态环境资源研究院 冰冻圈科学国家重点实验室, 甘肃 兰州 730000
    2.中国科学院大学, 北京 100049
    3.西北师范大学 地理与环境科学学院, 甘肃 兰州 730070
    4.南京信息工程大学 地理科学学院, 江苏 南京 210000
    5.兰州理工大学 土木工程学院, 甘肃 兰州 730050
  • 收稿日期:2019-09-06 修回日期:2020-05-28 出版日期:2020-10-31 发布日期:2020-12-08
  • 通讯作者: 吴晓东 E-mail:wangdong@lzb.ac.cn;wuxd@lzb.ac.cn
  • 作者简介:王栋(1994 - ), 男, 甘肃天水人, 2017年在西北师范大学获学士学位, 现为中国科学院西北生态环境资源研究院在读硕士研究生, 从事多年冻土区土壤有机碳研究. E-mail: wangdong@lzb.ac.cn
  • 基金资助:
    国家自然科学基金项目(41871060)

Modelling soil organic carbon distribution in the seasonally frozen ground area on the Qinghai-Tibet Plateau using the geographically weighted regression

Dong WANG1,2(), Xiaodong WU1(), Xianhua WEI3, Tonghua WU1, Lin ZHAO4, Ren LI1, Guojie HU1, Defu ZOU1, Wangping LI5   

  1. 1.State Key Laboratory of Cryospheric Science,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.University of Chinese Academy Sciences,Beijing 100049,China
    3.College of Geography and Environmental Science,Northwest Normal University,Lanzhou 730070,China
    4.School of Geographical Sciences,Nanjing University of Information Science & Technology,Nanjing 210000,China
    5.School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China
  • Received:2019-09-06 Revised:2020-05-28 Online:2020-10-31 Published:2020-12-08
  • Contact: Xiaodong WU E-mail:wangdong@lzb.ac.cn;wuxd@lzb.ac.cn

摘要:

青藏高原土壤有机碳储量(soil organic carbon stocks, SOCS)对于区域生态环境演替具有重要作用, 但是其空间分布数据还比较缺乏, 特别是季节冻土区的数据较少。基于378个土壤剖面数据, 结合与土壤有机碳(soil organic carbon, SOC)相关的地形、 气候以及植被等环境因子, 使用地理加权回归(geographically weighted regression, GWR)模型模拟了青藏高原季节冻土区0 ~ 30 cm、 0 ~ 50 cm、 0 ~ 100 cm和0 ~ 200 cm深度的SOC总量和空间分布。结果表明: 青藏高原季节冻土区SOCS自东南向西北递减, 表层0 ~ 200 cm的SOC总量约15.37 Pg; 季节冻土区不同植被类型SOC从大到小依次为森林、 灌丛、 高寒草甸、 高寒草原和高寒荒漠; 各土壤类型中棕壤、 黑钙土和泥炭土的SOC最大, 而棕钙土、 棕漠土、 灰棕漠土、 风沙土、 石质土、 盐土、 冷钙土、 寒漠土以及冷漠土的SOC最小。研究结果给出了青藏高原季节冻土区SOC的总量、 空间分布及规律, 可为相关地球模式的发展提供基础数据。

关键词: 土壤有机碳, 季节冻土区, 青藏高原, 地理加权回归

Abstract:

Soil organic carbon stocks (SOCS) in the Qinghai-Tibet Plateau have important implications for ecology succession, while the spatial distribution of SOC data are scarce, especially in seasonally frozen ground regions. Here, based on the multiple environmental variables and soil profile data (n=378), we evaluated the soil organic carbon (SOC) pool and spatial distribution of seasonally frozen ground which down to 2 m depth on the Qinghai-Tibet Plateau using the geographically weighted regression (GWR) approach. Our results showed that SOCS exhibited a decreasing tread from south-eastern to the north-western, and the SOC pools were estimated to be 15.37 Pg in the top 2 m. The average SOC under different vegetation types showed a decreasing trend as follows: forest>shrub> alpine meadow> alpine grassland> alpine desert. Among all soil types, brown earths, chernozems, and peat soils had the largest SOC, while brown pedocals, brown desert soils, grey-brown desert soils, Aeolian soils, chisley soils, saline, frigid desert soils, cold desert soil, and cold desert soils had the smallest SOC. Our results provided the storage, pattern, and spatial distribution of SOC in the seasonally frozen ground area, providing a scientific basis for future studies pertain to the Earth System Models.

Key words: soil organic carbon, seasonally frozen ground, Qinghai-Tibet Plateau, geographically weighted regression

中图分类号: 

  • P642.14