Exploring Urban XCO2 Patterns Using PRISMA Satellite: A Case Study in Shanghai

被引:0
作者
Wu, Yu [1 ]
Xie, Yanan [1 ]
Wang, Rui [1 ]
机构
[1] Shanghai Univ, Sch Commun & Informat Engn, Shanghai 200444, Peoples R China
基金
中国国家自然科学基金;
关键词
carbon dioxide (CO2); FIMAP-DOAS; PRISMA satellite; OCO-2; retrieval; CLOUD SHADOW DETECTION; CARBON-DIOXIDE; CO2; RETRIEVAL; REMOTE MEASUREMENTS; VERSION; 9; OCO-2; ALGORITHM; EMISSIONS; METHANE; URBANIZATION;
D O I
10.3390/atmos15030246
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
As global warming intensifies, monitoring carbon dioxide (CO2) has increasingly become a focal point of research. Investigating urban XCO2 emission systems holds paramount importance, given the pivotal role of cities as major contributors to carbon emissions. Consequently, this study centers on urban locales, employing Shanghai as a case study for a comprehensive evaluation of regional XCO2 levels. We utilized high spatial resolution imagery from the PRecursore IperSpettrale della Missione Applicativa (PRISMA) satellite to conduct an XCO2 assessment over the Baoshan District with a 30 m spatial resolution from April 2021 to October 2022. Our XCO2 analysis was conducted in two steps. Firstly, we conducted a sensitivity analysis on key parameters in the inversion process, where cloud cover severely interfered with inversion accuracy. Therefore, we developed the Fmask 4.0 cloud removal and iterative maximum a posteriori differential optical absorption spectroscopy (FIMAP-DOAS) algorithm. This novel integration eliminated cloud interference during the inversion process, achieving high-precision CO2 detection in the region. Secondly, we compared the XCO2 of the region with Level-2 data from carbon monitoring satellites such as OCO-2. The comparison results showed a strong consistency, with a root mean squared error (RMSE) of 0.75 ppm for Shanghai XCO2 data obtained from the PRISMA satellite compared to OCO-2 Level-2 data and an RMSE of 1.49 ppm compared to OCO-3. This study successfully established a high-accuracy and high-spatial-resolution XCO2 satellite monitoring system for the Shanghai area. The efficacy of the FIMAP-DOAS algorithm has been demonstrated in CO2 monitoring and inversion within urban environments, with potential applicability to other cities.
引用
收藏
页数:16
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