Preprints
https://doi.org/10.5194/essd-2022-108
https://doi.org/10.5194/essd-2022-108
 
01 Apr 2022
01 Apr 2022
Status: this preprint is currently under review for the journal ESSD.

Climatology of aerosol components concentration derived by GRASP algorithm from multi-angular polarimetric POLDER-3 observations

Lei Li1, Yevgeny Derimian2, Cheng Chen2,3, Xindan Zhang1, Huizheng Che1, Gregory L. Schuster4, David Fuertes3, Pavel Litvinov3, Tatyana Lapyonok2, Anton Lopatin3, Christian Matar3, Fabrice Ducos2, Yana Karol3, Benjamin Torres2, Ke Gui1, Yu Zheng1, Yuanxin Liang1, Yadong Lei1, Jibiao Zhu1, Lei Zhang1, Junting Zhong1, Xiaoye Zhang1, and Oleg Dubovik2 Lei Li et al.
  • 1State Key Laboratory of Severe Weather (LASW) and Key Laboratory of Atmospheric Chemistry (LAC), Chinese Academy of Meteorological Sciences, CMA, Beijing, 100081, China
  • 2Univ. Lille, CNRS, UMR 8518 - LOA - Laboratoire d’Optique Atmosphérique, F-59000 Lille, France
  • 3GRASP-SAS, Villeneuve d’Ascq, France
  • 4NASA Langley Research Center, Hampton, VA, USA

Abstract. The study presents a climatology of aerosol composition concentration obtained by a recently developed GRASP/Component (GRASP stands for the Generalized Retrieval of Atmosphere and Surface Properties algorithm) approach applied to the whole archive of POLDER-3 observations. The conceptual specific of the GRASP/Component approach is in direct retrieval of aerosol speciation (component fraction) without an intermediate retrievals of aerosol optical characteristics. Despite a global validation of the derived aerosol component product is challenging, the results obtained are in line with general knowledge about aerosol types in different regions. In addition, we compare the GRASP derived black carbon and dust components with those of the MERRA-2 (Modern-Era Retrospective Analysis for Research and Applications, version 2) product. Quite reasonable general agreement in spatial and temporal distribution of the species provided by GRASP and MERRA-2 was found, the differences however appeared in regions known for strong biomass burning and dust emissions; the reasons for the discrepancies are discussed. The other derived components, such as concentration of absorbing (black carbon, brown carbon, iron oxides content in mineral dust) and scattering (ammonium sulphate and nitrate, organic carbon, non-absorbing dust) aerosol, represent scarce but imperative information for validation and potential adjustment of chemical transport models. The aerosol optical properties derived by GRASP/Component were found to agree well with the AERONET ground reference data and fully consistent with the previous GRASP Optimized, High Precision and Models retrieval versions applied to POLDER-3 data. Thus, the presented extensive climatology product provides an opportunity for understanding variabilities and trends in global and regional distributions of aerosol species. The climatology of the aerosol components obtained in addition to the aerosol optical properties provides additional valuable, qualitatively new inside about aerosol distributions and, therefore, demonstrates advantages of multi-angular polarimetric satellite observations as the next frontier for aerosol inversion from advanced satellite observations. The GRASP/Component products are publicly available (https://www.grasp-open.com/products/, last access: 15 March 2022) and the dataset used in the current study is registedred under https://doi.org/10.5281/zenodo.6395384 (Li et al., 2022).

Lei Li et al.

Status: open (until 04 Jun 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2022-108', Anonymous Referee #1, 02 May 2022 reply
  • RC2: 'Comment on essd-2022-108', Anonymous Referee #2, 06 May 2022 reply
  • RC3: 'Comment on essd-2022-108', Yingxi Shi, 26 May 2022 reply

Lei Li et al.

Data sets

Dataset used for climatology of aerosol components concentration derived by GRASP algorithm from POLDER-3 observations Li Lei; Dubovik Oleg; Che Huizheng https://doi.org/10.5281/zenodo.6395384

Lei Li et al.

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Short summary
A climatology of aerosol composition concentration obtained by GRASP/Component from POLDER-3 observations is presented. The conceptual specific of the GRASP/Component approach is in direct retrieval of aerosol speciation without an intermediate retrievals of aerosol optical characteristics. The satellite-derived components dataset represents scarce but imperative information for validation and potential adjustment of chemical transport models.