img

Wechat

Adv search

Journal of Desert Research ›› 2023, Vol. 43 ›› Issue (4): 168-179.DOI: 10.7522/j.issn.1000-694X.2023.00042

Previous Articles     Next Articles

The impacts of climate change and land use change on terrestrial ecosystem carbon storage of Gansu province from 1980 to 2020

Yongzhong Feng1,2(), Zhenliang Yin3(), Lingge Wang4, Long Mao1, Xiaoyi Qiu1, Zhuolin Tao1, Cuixia Wu1   

  1. 1.Department of Natural Resources of Gansu Province,Lanzhou 730000,China
    2.College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China
    3.Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    4.Faculty of Geomatics / Nationl-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring / Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou Jiaotong University,Lanzhou 730000,China
  • Received:2022-08-23 Revised:2022-12-12 Online:2023-07-20 Published:2023-08-14
  • Contact: Zhenliang Yin

Abstract:

Land use change has a significant impact on carbon storage in dryland terrestrial ecosystems, but the impact of climate change on it is not yet clear. Based on the land use data and the dynamic data of vegetation and soil carbon density from 1980 to 2020, this study uses the InVEST model to measure the trends of carbon storage in Gansu province and each state from 1980 to 2020, and then quantitatively assesses the impacts of climate change and land use change on terrestrial ecosystem carbon storage. The results show that: (1) The overall climate state of Gansu Province tends to be warm and humid, while the intensity of land use shifts gradually and drastically, and changes from farmland expansion and grassland loss in 1980-2000 to unused land management and urban expansion in 2000-2020. (2) From 1980 to 2020, the average carbon storage in Gansu province ecosystem was 2 651.01 Tg C (1 Tg=1012 g), with high value of carbon density regions in the Gannan Plateau and Qilian Mountains, and low value regions mainly in the northwest desert of the Hexi Corridor and the downstream of the inland river basin. The rate of carbon sequestration shows a decreasing spatial pattern from the southeast to the northwest, with the top four prefecture-level cities ranked by Gannan Tibetan Autonomous Prefecture, Longnan City, Zhangye City and Qingyang City in order. (3) The net increase of terrestrial ecosystem carbon storage in Gansu Province from 1980 to 2020 is 208.79 Tg C. Among them, in 1980-2000, the increase of carbon storage mainly comes from climate change (63.01 Tg C), while from 2000 to 2020, land use change is the main driver of carbon storage change in terrestrial ecosystems in Gansu province, especially in forest-grass-sand management and artificial oasis expansion.

Key words: terrestrial ecosystem, effect of carbon sequestration, dynamic carbon density data, climate change, land use

CLC Number: