New Possibilities For Air Quality Monitoring From Space-Borne Remote Sensing: Application Of GRASP Algorithm To S5p/TROPOMI and PRISMA Measurements Pavel Litvinov 1 , Cheng Chen 1 , Oleg Dubovik 2 , David Fuertes 1, Franco Migiletta 3 , Monica Pepe 4 , Lorenzo Genesio 3 , Lorenzo Busetto 4 , Lukas Bindreiter 5 , Verena Lanzinger 5 , Petrut Cobarzan 5 , Martin de Graaf 6 , Gijsbert Tilstra 6 , P. Stammes 6 , and C. Retscher 7 1 GRASP-SAS, Generalized Retrieval of Atmosphere and Surface Properties, France 2 Laboratoire d'Optique Atmosphérique, CNRS, Université Lille-1, France 3 Institute of Bioeconomy,CNR, Sesto Fiorentino (FI), Italy 4 Institute for Electromagnetic Sensing of the Environment,CNR, Milano, Italy 5 Cloudflight Austria GmbH, Linz, Austria 6 KNMI, Utrechtseweg 297, 3731 GA De Bilt, The Netherlands 7 ESA, ESRIN, Largo Galileo Galilei 1, 00044 Frascati (RM), Italy 1. S5p/TROPOMI and PRISMA S5P/TROPOMI provides global hyperspectral measurements in wide spectral range which can be beneficial for aerosol and surface characterization PRISMA (PRecursore IperSpettrale della Missione Applicativa) is an Italian Space Agency (ASI) hyperspectral mission with a swath width of 30 km and with a ground sampling distance of 30 m (hyperspectral), PRISMA measurements can be used for environment monitoring at regional scale but with high spatial resolution. 2. Approach for the combined retrieval Ø GRASP Retrieval of S5p/TROPOMI measurements: - Extended aerosol characterization for aerosol typing (size, absorption) Ø GRASP/PRISMA retrieval : - Aerosol type information from GRASP/TROPOMI retrieval - AOD retrieval at high (PRISMA) spatial resolution - Surface reflectance at high spatial resolution 3. AOD and surface reflectance at high resolution from the combined retrieval 4. Conclusions and outlook Ø Combination of the instruments with coarse and fine spatial resolution (for example, S5p/TROPOMI and PRISMA) opens new possibilities for aerosol sources identifications at high spatial resolution and aerosol emission/pollution monitoring. Ø The retrieval from the instrument with coarse resolution and global coverage can provide information about aerosol type and aerosol background. Ø The retrieval from the sensor with fine spatial resolution can use this information to get AOD at high spatial resolution for identification of local aerosol sources and air quality monitoring. Ø The combined retrieval provides enhanced surface reflectance characterization at high spatial resolution. Ø Developed GRASP methodology for the combination PRISMA+S5p can potentially incorporate other satellites like S5p+S2 or S5p+OLCI+S2 etc. GRASP/PRISMA AOD, 100 m pixel resolution, Venice, Italy March 3, 2019 April 12, 2020 June 21, 2020 July 8, 2020 GRASP/PRISMA Surface Reflectance Venice, July 8, 2020. 100 m pixel resolution PRISMA TOA Reflectance July 8, 2020

New Possibilities For Air Quality Monitoring From Space

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Page 1: New Possibilities For Air Quality Monitoring From Space

New Possibilities For Air Quality Monitoring From Space-Borne Remote Sensing: Application Of GRASP

Algorithm To S5p/TROPOMI and PRISMA MeasurementsPavel Litvinov1, Cheng Chen1, Oleg Dubovik2, David Fuertes1, Franco Migiletta3, Monica Pepe4, Lorenzo Genesio3, Lorenzo Busetto4 ,

Lukas Bindreiter5, Verena Lanzinger5, Petrut Cobarzan5 , Martin de Graaf6, Gijsbert Tilstra6 , P. Stammes6, and C. Retscher7

1 GRASP-SAS, Generalized Retrieval of Atmosphere and Surface Properties, France2 Laboratoire d'Optique Atmosphérique, CNRS, Université Lille-1, France

3 Institute of Bioeconomy,CNR, Sesto Fiorentino (FI), Italy4 Institute for Electromagnetic Sensing of the Environment,CNR, Milano, Italy

5 Cloudflight Austria GmbH, Linz, Austria6 KNMI, Utrechtseweg 297, 3731 GA De Bilt, The Netherlands

7 ESA, ESRIN, Largo Galileo Galilei 1, 00044 Frascati (RM), Italy

1. S5p/TROPOMI and PRISMA

S5P/TROPOMI provides global hyperspectral measure-ments in wide spectral range which can be beneficial foraerosol and surface characterization

PRISMA (PRecursore IperSpettrale della MissioneApplicativa) is an Italian Space Agency (ASI) hyperspectralmission with a swath width of 30 km and with a groundsampling distance of 30 m (hyperspectral), PRISMAmeasurements can be used for environment monitoring atregional scale but with high spatial resolution.

2. Approach for the combined retrievalØ GRASP Retrieval of S5p/TROPOMI measurements:

- Extended aerosol characterization for aerosol typing (size, absorption)

Ø GRASP/PRISMA retrieval :- Aerosol type information from GRASP/TROPOMI

retrieval- AOD retrieval at high (PRISMA) spatial resolution- Surface reflectance at high spatial resolution

3. AOD and surface reflectance at high resolutionfrom the combined retrieval

4. Conclusions and outlookØ Combination of the instruments with coarse and fine

spatial resolution (for example, S5p/TROPOMI andPRISMA) opens new possibilities for aerosol sourcesidentifications at high spatial resolution and aerosolemission/pollution monitoring.

Ø The retrieval from the instrument with coarse resolutionand global coverage can provide information aboutaerosol type and aerosol background.

Ø The retrieval from the sensor with fine spatial resolutioncan use this information to get AOD at high spatialresolution for identification of local aerosol sources andair quality monitoring.

Ø The combined retrieval provides enhanced surfacereflectance characterization at high spatial resolution.

Ø Developed GRASP methodology for the combinationPRISMA+S5p can potentially incorporate other satelliteslike S5p+S2 or S5p+OLCI+S2 etc.

GRASP/PRISMA AOD, 100 m pixel resolution, Venice, Italy

March 3, 2019 April 12, 2020

June 21, 2020 July 8, 2020

GRASP/PRISMA Surface Reflectance

Venice, July 8, 2020. 100 m pixel resolutionPRISMA TOA Reflectance

July 8, 2020