DOI: 10.1016/j.atmosenv.2020.117357
论文题名: Evaluation of Himawari-8 version 2.0 aerosol products against AERONET ground-based measurements over central and northern China
作者: Wang L. ; Cai K. ; Si Y. ; Yu C. ; Zheng H. ; Li S.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 224 语种: 英语
英文关键词: Geostationary satellites
; Optical properties
; Quality assurance
; Urban growth
; Aerosol optical thickness
; Aerosol robotic networks
; Central chinas
; High temporal resolution
; Himawari-8
; Northern China
; Single scattering albedo
; Statistical evaluation
; Aerosols
; AERONET
; aerosol
; algorithm
; geostationary satellite
; ground-based measurement
; optical property
; surface reflectance
; aerosol
; albedo
; algorithm
; article
; China
; information retrieval
; optical depth
; quality control
; thickness
; China
学科: AOT
; Central China
; Himawari-8
; Northern China
; Statistical evaluation
中文摘要: Himawari-8, a new generation geostationary satellite, carries the Advanced Himawari Imager (AHI), which can provide high temporal resolution observations (10 min) in monitoring the distribution and variation of aerosol over large areas. Recently, the AHI aerosol algorithm was refined, and the updated AHI version 2.0 Level 2 aerosol products were released. However, these products have not been comprehensively evaluated. This study aims to assess the accuracy of AHI version 2.0 Level 2 aerosol products over central and northern China. We compared nine hourly (Beijing time: 08:00 to 16:00) AHI Aerosol Optical Thickness (AOT) retrievals from 2016 to 2017 with AErosol RObotic NETwork (AERONET) measurements over four merged sites: Beijing-urban, Xianghe, Xuzhou and Baotou. The results show that the AHI AOT product provides accurate retrievals at 09:00, 10:00 and 11:00, but these values overestimated AOT at high aerosol loadings. In contrast, AHI AOT retrievals at 13:00, 14:00 and 15:00 exhibit significant overestimation. More than 67% of these retrievals fell above the Expected Error (EE: ± 0.15 × AOTAERONET ± 0.05). The AHI Quality Assurance (QA_flag) performs poorly in constraining overestimation of the AHI AOT product. The “no confidence” Ångström exponent (AE), additional cloud and surface reflectance factors in the QA_flag have negative impacts on AOT retrieval accuracy. For different aerosol models, the AHI AE and Optical Depth Ratio fine (RF) products exhibit large differences between the forenoon (09:00, 10:00 and 11:00) and afternoon (13:00, 14:00 and 15:00). However, the AHI Single-scattering albedo (SSA) values mainly distribute in the range from 0.93 to 0.94, exhibiting minor differences in different times, sites and aerosol models. These results indicated that these products have errors induced by the AHI algorithm. © 2020 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160457
Appears in Collections: 气候变化与战略
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作者单位: College of Environment and Planning, Henan University, Kaifeng, China; Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Ministry of Education, Kaifeng, China; State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Wang L.,Cai K.,Si Y.,et al. Evaluation of Himawari-8 version 2.0 aerosol products against AERONET ground-based measurements over central and northern China[J]. Atmospheric Environment,2020-01-01,224