气候变化领域集成服务门户(CCPortal): Performance comparison of Fengyun-4A and Himawari-8 in PM2.5 estimation in China

CCPortal

DOI	10.1016/j.atmosenv.2021.118898
	Performance comparison of Fengyun-4A and Himawari-8 in PM2.5 estimation in China
	Hu Y.; Zeng C.; Li T.; Shen H.
发表日期	2022
ISSN	1352-2310
卷号	271
英文摘要	The increase in the PM2.5 concentration has become the focus of public concern due to the health risks it poses. In contrast to the sparsely distributed ground stations, geostationary satellites can provide a unique method of frequently monitoring national-scale PM2.5 concentrations. The Himawari-8 and Fengyun-4A (FY-4A) satellites have both been used to monitor PM2.5 concentrations due to their high spatial (5 km and 4 km, respectively) and temporal resolutions (hourly), but it is still not clear which satellite is more suitable for such studies. In this study, the hourly PM2.5 concentrations were estimated based on a deep belief network using top-of-atmosphere (TOA) reflectance data and other auxiliary variables from April 2018 to March 2019. To comprehensively and effectively verify the accuracy of the results, three cross-validation methods were applied. The evaluation indexes of FY-4A were slightly higher than those of Himawari-8. The distributions of their estimated PM2.5 concentration mappings were consistent in terms of the overall trend, but they exhibit regional inconsistencies. In-depth analysis of the results revealed that the main reasons for these inconsistencies are the differences in the spatial resolution, training data, satellite platforms, and retrieval algorithms. Through comparative analysis, the effects of the satellite platforms and retrieval algorithms were determined to be negligible. In general, the FY-4A satellite was found to be more adaptable to PM2.5 concentration estimation in China due to its wide coverage and high estimation accuracy. © 2021 Elsevier Ltd
关键词	Air pollution FY-4A Geostationary satellite Himawari-8 PM2.5
语种	英语
scopus关键词	Health risks; Fengyun-4a; Ground stations; Himawari-8; Performance comparison; PM 2.5; Public concern; Retrieval algorithms; Satellite platforms; Satellite retrieval; Temporal resolution; Geostationary satellites; atmospheric pollution; comparative study; FengYun; geostationary satellite; particulate matter; performance assessment; air pollution; algorithm; article; China; cross validation; deep belief network; information retrieval; particulate matter 2.5; validation process; China
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248091
作者单位	School of Resource and Environmental Sciences, Wuhan University, Wuhan, 430079, China; Collaborative Innovation Center of Geospatial Technology, Wuhan, 430079, China; The Key Laboratory of Geographic Information System, Ministry of Education, Wuhan University, Wuhan, 430079, China; School of Geospatial Engineering and Science, Sun Yat-Sen University, Zhuhai, 519082, China
推荐引用方式 GB/T 7714	Hu Y.,Zeng C.,Li T.,et al. Performance comparison of Fengyun-4A and Himawari-8 in PM2.5 estimation in China[J],2022,271.
APA	Hu Y.,Zeng C.,Li T.,&Shen H..(2022).Performance comparison of Fengyun-4A and Himawari-8 in PM2.5 estimation in China.ATMOSPHERIC ENVIRONMENT,271.
MLA	Hu Y.,et al."Performance comparison of Fengyun-4A and Himawari-8 in PM2.5 estimation in China".ATMOSPHERIC ENVIRONMENT 271(2022).