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Forest and Grassland Resources Research ›› 2023›› Issue (6): 98-104.doi: 10.13466/j.cnki.lczyyj.2023.06.012

• Technical Application • Previous Articles     Next Articles

Spatial Distribution of Forest Carbon Storage in the Pearl River Delta Based on Geographically Weighted Regression Model

CAO Cong1(), GUO Zexin1, GUO Yanqing2, MO Yanqing3, LIU Ping1()   

  1. 1. College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou 510642,China
    2. Guangdong Eco-engineering Polytechnic,Guangzhou 510520,China
    3. Guangdong Lingnanyuan Exploration and Design Co.Ltd.,Guangzhou 510000,China
  • Received:2023-08-24 Revised:2023-11-09 Online:2023-12-28 Published:2024-02-21

Abstract:

Based on the data of 419 consecutive forest resource inventory plots in the Pearl River Delta region in 2017,the spatial distribution of forest carbon storage in the Pearl River Delta region was predicted using the Ordinary Least Squares (OLS)model and four Geographically Weighted Regression (GWR)models.The results showed that all four GWR models had better model fitting performance and independent sample test results than OLS models,with MGWR (Gaussian)model having the best fitting performance and GWR (Gaussian)model having the best independent sample test results;Using the GWR (Gaussian)model to draw a spatial distribution map of forest carbon storage,the estimated carbon storage per unit area of the Pearl River Delta forest is 6.15-81.52 t/hm2,with an average value of 33.46 t/hm2.The estimation error is better than the OLS model,and the overall spatial distribution pattern shows a high center and low edge.It also provides a new method and idea for the estimation of forest carbon stocks in the Pearl River Delta.

Key words: carbon storage, spatial distribution, ordinary least square, geographically weighted regression, Pearl River Delta

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