Preprints
https://doi.org/10.5194/egusphere-2022-315
https://doi.org/10.5194/egusphere-2022-315
13 Jul 2022
 | 13 Jul 2022

Retrievals of Precipitable Water Vapor and Aerosol Optical Depth from direct sun measurements with EKO MS711 and MS712 Spectroradiometers

Congcong Qiao, Song Liu, Juan Huo, Xihan Mu, Ping Wang, Shengjie Jia, Xuehua Fan, and Minzheng Duan

Abstract. Based on the strict radiative transfer algorithm, a new method is developed to derive the Precipitable Water Vapor (PWV) and Aerosol optical depth (AOD) from the ground-based measurements of direct sun irradiance. The attenuated direct irradiance from 300 nm to 1700 nm with FWHM of 6.5 nm are measured by a pair of grating spectroradiometers MS711 and MS712, located at the Institute of Atmospheric Physics, Chinese Academy of Sciences (39.98° N, 116.38° E), from June 2020 to March 2021. Compared to that of regular sun photometers such as CIMEL and POM, a strong water vapor absorption band near 1370 nm is introduced to derive PWV for the relatively dry atmosphere. The PWV and AOD inversion results obtained by EKO are compared with the synchronous data of CIMEL, and the two are highly consistent. The correlation coefficient, mean bias and standard deviation of PWVEKO and PWVCIMEL are 0.999, -0.027 cm (-3.57 %) and 0.054 cm (3.93 %) respectively, and the relative deviations of the differences between the two are slightly larger for drier air (PWV<5 mm) and lower solar elevation angle. The correlation coefficients of AODEKO and AODCIMEL at 380, 440, 500, 675, 870, 1020 nm are greater than 0.99, and the relative deviations are between -13.59 % and 9.37 %.

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Journal article(s) based on this preprint

24 Mar 2023
Retrievals of precipitable water vapor and aerosol optical depth from direct sun measurements with EKO MS711 and MS712 spectroradiometers
Congcong Qiao, Song Liu, Juan Huo, Xihan Mu, Ping Wang, Shengjie Jia, Xuehua Fan, and Minzheng Duan
Atmos. Meas. Tech., 16, 1539–1549, https://doi.org/10.5194/amt-16-1539-2023,https://doi.org/10.5194/amt-16-1539-2023, 2023
Short summary
Congcong Qiao, Song Liu, Juan Huo, Xihan Mu, Ping Wang, Shengjie Jia, Xuehua Fan, and Minzheng Duan

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-315', Anonymous Referee #3, 17 Aug 2022
    • AC1: 'Reply on Referee #3', Congcong Qiao, 23 Oct 2022
  • RC2: 'Comment on egusphere-2022-315', Anonymous Referee #2, 26 Aug 2022
    • AC2: 'Reply on Referee #2', Congcong Qiao, 23 Oct 2022

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-315', Anonymous Referee #3, 17 Aug 2022
    • AC1: 'Reply on Referee #3', Congcong Qiao, 23 Oct 2022
  • RC2: 'Comment on egusphere-2022-315', Anonymous Referee #2, 26 Aug 2022
    • AC2: 'Reply on Referee #2', Congcong Qiao, 23 Oct 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
AR by Congcong Qiao on behalf of the Authors (23 Oct 2022)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (24 Oct 2022) by Jian Xu
RR by Chris Sioris (15 Nov 2022)
ED: Reconsider after major revisions (17 Nov 2022) by Jian Xu
AR by Congcong Qiao on behalf of the Authors (15 Jan 2023)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (17 Jan 2023) by Jian Xu
RR by Chris Sioris (24 Jan 2023)
ED: Publish subject to minor revisions (review by editor) (26 Jan 2023) by Jian Xu
AR by Congcong Qiao on behalf of the Authors (05 Feb 2023)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (07 Feb 2023) by Jian Xu
AR by Congcong Qiao on behalf of the Authors (17 Feb 2023)  Author's response   Manuscript 

Journal article(s) based on this preprint

24 Mar 2023
Retrievals of precipitable water vapor and aerosol optical depth from direct sun measurements with EKO MS711 and MS712 spectroradiometers
Congcong Qiao, Song Liu, Juan Huo, Xihan Mu, Ping Wang, Shengjie Jia, Xuehua Fan, and Minzheng Duan
Atmos. Meas. Tech., 16, 1539–1549, https://doi.org/10.5194/amt-16-1539-2023,https://doi.org/10.5194/amt-16-1539-2023, 2023
Short summary
Congcong Qiao, Song Liu, Juan Huo, Xihan Mu, Ping Wang, Shengjie Jia, Xuehua Fan, and Minzheng Duan
Congcong Qiao, Song Liu, Juan Huo, Xihan Mu, Ping Wang, Shengjie Jia, Xuehua Fan, and Minzheng Duan

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Short summary
We established a spectral-fitting method to derive precipitable water vapor and aerosol optical depth based on strict radiative transfer theory by the spectral measurements of direct sun from EKO MS711 and MS712 spectroradiometers. The retrievals were compared with that of collocated CE-318 Photometer, the results showed a high degree of consistency. Besides the water vapor absorption bands near 940 nm, that near 1370 nm is demonstrated more suitable for water vapor retrieval of drier atmosphere.