AccScience Publishing / JCAU / Online First / DOI: 10.36922/jcau.3069
ORGINAL ARTICLE

Temporal and spatial characteristics of carbon storage and its response to land-use change in Chengdu, China

Yuxin Cai1 Changliu Wang1* Yuan Zhou1 Dejie Deng2
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1 Department of Architecture, School of Architecture, Southwest Minzu University, Chengdu, Sichuan, China
2 Department of Geographic Information and Remote Sensing, School of Geography and Planning, Chengdu University of Technology, Chengdu, Sichuan, China
Journal of Chinese Architecture and Urbanism, 3069 https://doi.org/10.36922/jcau.3069
Submitted: 2 March 2024 | Accepted: 20 May 2024 | Published: 3 July 2024
(This article belongs to the Special Issue Regional Green Building)
© 2024 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution -Noncommercial 4.0 International License (CC-by the license) ( https://creativecommons.org/licenses/by-nc/4.0/ )
Abstract

The accurate monitoring of the dynamic relationship between land use and carbon storage can provide a scientific basis for the government to formulate carbon emission reduction policies and promote the green development of cities, achieving a win–win situation for both ecology and the economy. As a national central city in southwest China, Chengdu has experienced rapid land-use changes in the past decade due to the implementation of development strategies such as urban-rural integration and the construction of a “Park City.” To explore the spatial and temporal distribution characteristics of carbon storage in Chengdu during this period, three representative years (2010, 2015, and 2020) were selected to estimate the changes in carbon storage using the Integrated Valuation of Ecosystem Services and Trade-offs (InVEST) model. From 2010 to 2020, the land-use changes in Chengdu primarily manifested in the mutual transformation between cultivated land, forest land, and construction land. The conversion between the high-carbon-density-land-use type and the low-carbon-density-land-use type was an important driving factor for the change in carbon storage in Chengdu, and it was also the main reason for the overall reduction of carbon storage in the city. The carbon source areas of Chengdu demonstrated an aggregated spatial pattern, with the northern and southern parts of the city being the main carbon source areas. In contrast, the carbon sink areas were mainly distributed in the western and eastern parts, as well as the ecological park around the expressway in Chengdu. This distribution was mainly due to increased efforts to restore inefficiently used cultivated land back to forest and grassland. The proposal of the “Park City” strategy has promoted the construction of green infrastructure in Chengdu and has effectively increased urban carbon sinks.

Keywords
Land-use change
Carbon storage
InVEST model
Chengdu city
Funding
This study was supported by the Fundamental Research Funds for the Central Universities, Southwest Minzu University (Grant number: 2023SYJSCX42) and Chengdu Philosophy and Social Science Planning Project (Grant number: 2021BZ072).
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Conflict of interest
The authors declare that they have no competing interests.
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