Three-Dimensional Distribution of Biomass Burning Aerosols from Australian Wildfires Observed by TROPOMI Satellite Observations

Remote Sensing

卷:14

Claude Derognat¹  Xiong Liu²  Peter Zoogman²  Diego Loyola³  Ronny Lutz³  Solène Turquety⁴  Dung Tran⁵  Farouk Lemmouchi⁶  Pasquale Sellitto⁶  Juan Cuesta⁶  Guillaume Siour⁶  Maxim Eremenko⁶  Gaëlle Dufour⁷ 

[1] ARIA Technologies, 92100 Boulogne-Billancourt, France;

[2] Center for Astrophysics, Harvard & Smithsonian, Cambridge, MA 02138, USA;

[3] German Aerospace Center (DLR), Remote Sensing Technology Institute, Oberpfaffenhofen, 82234 Weßling, Germany;

[4] LATMOS/IPSL, Sorbonne Université, UVSQ, CNRS, 75252 Paris, France;

[5] LMD, Sorbonne Universités, CNRS, 75231 Paris, France;

[6] Univ Paris Est Creteil and Université Paris Cité, CNRS, LISA, 94010 Créteil, France;

[7] Université Paris Cité and Univ Paris Est Creteil, CNRS, LISA, 75013 Paris, France;

关键词: fine particulate matter;    biomass burning;    black carbon;    smoke;    aerosol extinction vertical profile;    3D distribution of aerosols;   

DOI  :  10.3390/rs14112582

来源: DOAJ

【 摘 要 】

We present a novel passive satellite remote sensing approach for observing the three-dimensional distribution of aerosols emitted from wildfires. This method, called AEROS5P, retrieves vertical profiles of aerosol extinction from cloud-free measurements of the TROPOMI satellite sensor onboard the Sentinel 5 Precursor mission. It uses a Tikhonov–Phillips regularization, which iteratively fits near-infrared and visible selected reflectances to simultaneously adjust the vertical distribution and abundance of aerosols. The information on the altitude of the aerosol layers is provided by TROPOMI measurements of the reflectance spectra at the oxygen A-band near 760 nm. In the present paper, we use this new approach for observing the daily evolution of the three-dimensional distribution of biomass burning aerosols emitted by Australian wildfires on 20–24 December 2019. Aerosol optical depths (AOD) derived by vertical integration of the aerosol extinction profiles retrieved by AEROS5P are compared with MODIS, VIIRS and AERONET coincident observations. They show a good agreement in the horizontal distribution of biomass burning aerosols, with a correlation coefficient of 0.87 and a mean absolute error of 0.2 with respect to VIIRS. Moderately lower correlations (0.63) were found between AODs from AEROS5P and MODIS, while the range of values for this comparison was less than half of that with respect to VIIRS. A fair agreement was found between coincident transects of vertical profiles of biomass burning aerosols derived from AEROS5P and from the CALIOP spaceborne lidar. The mean altitudes of these aerosols derived from these two measurements showed a good agreement, with a small mean bias (185 m) and a correlation coefficient of 0.83. Moreover, AEROS5P observations reveal the height of injection of the biomass burning aerosols in 3D. The highest injection heights during the period of analysis were coincident with the largest fire radiative power derived from MODIS. Consistency was also found with respect to the vertical stability of the atmosphere. The AEROS5P approach provides retrievals for cloud-free scenes over several regions, although currently limited to situations with a dominating presence of smoke particles. Future developments will also aim at observing other aerosol species.

【 授权许可】

Unknown