Bulletin of Surveying and Mapping ›› 2021, Vol. 0 ›› Issue (11): 25-30.doi: 10.13474/j.cnki.11-2246.2021.333

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Scale effect analysis of carbon emission simulation based on NPP-VIIRS images in Guangdong province

WANG Yanjun1,2,3, WANG Mengjie3, LI Shaochun3, LIN Yunhao3   

  1. 1. Hunan Provincial Key Laboratory of Geo-Information Engineering in Surveying, Mapping and Remote Sensing, Hunan University of Science and Technology, Xiangtan 411201, China;
    2. National-local Joint Engineering Laboratory of Geo-spatial Information Technology, Hunan University of Science and Technology, Xiangtan 411201, China;
    3. School of Resource Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
  • Received:2021-04-25 Revised:2021-09-17 Published:2021-12-02

Abstract: Carbon emission estimation is one of the most important fields of energy conservation and global climate change research. NPP-VIIRS night light image can reflect the intensity of human activities and is widely used in the spatial estimation and analysis of carbon emission. This paper constructs and compares the fitting models of energy consumption and carbon emissions estimation in Guangdong province based on NPP-VIIRS night light images in 2015, and focused on the scale effect of NPP-VIIRS images, and discussed the accuracy of model results at 500 m, 1000 m, 1500 m and 2000 m resolution. The results showed that:①The quadratic polynomial fitting model is a better method for carbon emission estimation, and the fitting results of 21 cities in Guangdong province are quite different. ②The root mean square error of Guangdong province carbon emission estimation results from NPP-VIIRS nighttime light image with 1000 m resolution is the smallest, and the absolute error of 2000 m resolution is smaller, and the model operation efficiency is improved by scaling up. ③Estimation results of carbon emissions show fluctuation from night light images with different spatial resolutions increasing continuously from 500 m to 2000 m at an interval of 100 m and tend to balance at the resolution of 1000 m. This paper analyzes the carbon emission estimation model of Guangdong province based on NPP-VIIRS night light images, and reveals the scale effect rules of different spatial resolution images, which can provide a reference for spatial scale optimization and result refinement of carbon emission estimation of night light images.

Key words: carbon emission, NPP-VIIRS nighttime light image, spatial resolution, scale effect, carbon emission estimation

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