Volcanic Ash and SO2 retrievals using synthetic MODIS TIR data: comparison between inversion procedures and sensitivity analysis
<div class="page" title="Page 1"><div class="layoutArea"><div class="column"><p><span>In this work the volcanic ash and SO</span><span>2 </span><span>retrievals obtained by applying three different procedur...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
2015-02-01
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| Series: | Annals of Geophysics |
| Online Access: | http://www.annalsofgeophysics.eu/index.php/annals/article/view/6616 |
| _version_ | 1818929614188183552 |
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| author | Stefano Corradini Sergio Pugnaghi Alessandro Piscini Lorenzo Guerrieri Luca Merucci Matteo Picchiani Marco Chini |
| author_facet | Stefano Corradini Sergio Pugnaghi Alessandro Piscini Lorenzo Guerrieri Luca Merucci Matteo Picchiani Marco Chini |
| author_sort | Stefano Corradini |
| collection | DOAJ |
| description | <div class="page" title="Page 1"><div class="layoutArea"><div class="column"><p><span>In this work the volcanic ash and SO</span><span>2 </span><span>retrievals obtained by applying three different procedures (LUT - Look Up Table, NN - Neural Network and VPR - Volcanic Plume Removal) on MODIS Thermal InfraRed </span><span>(</span><span>TIR) </span>synthetic measurements have been compared. The synthetic measurements are generated using MODTRAN Radiative Transfer Model (RTM) for defined volcanic cloud configurations. The results, presented as the percentage difference between the retrieved ash and SO2 total masses and the true values used for the synthetic data generation, indicate maximum differences of +/- 15% and +/- 10% for all the procedures and for ash and SO2 retrievals respectively. A sensitivity analysis has been also realized to investigate the influence of volcanic cloud altitude and water vapour profile on SO2 retrievals at 7.3 and 8.6 μm. Results confirm the high sensitivity of the 7.3 μm retrieval to the volcanic cloud altitude and show that the SO2 total masses estimated at 7.3 and 8.6 μm separately can be used to improve the information on the plume height. Finally, the water vapour profile is used to compute the minimum altitude over which the 7.3 μm retrieval is effective. </p></div></div></div> |
| first_indexed | 2024-12-20T03:47:36Z |
| format | Article |
| id | doaj.art-44f0bf14fc674f8eb7d03fe8ca946e0c |
| institution | Directory Open Access Journal |
| issn | 1593-5213 2037-416X |
| language | English |
| last_indexed | 2024-12-20T03:47:36Z |
| publishDate | 2015-02-01 |
| publisher | Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
| record_format | Article |
| series | Annals of Geophysics |
| spelling | doaj.art-44f0bf14fc674f8eb7d03fe8ca946e0c2022-12-21T19:54:35ZengIstituto Nazionale di Geofisica e Vulcanologia (INGV)Annals of Geophysics1593-52132037-416X2015-02-0157010.4401/ag-66165979Volcanic Ash and SO2 retrievals using synthetic MODIS TIR data: comparison between inversion procedures and sensitivity analysisStefano Corradini0Sergio Pugnaghi1Alessandro Piscini2Lorenzo Guerrieri3Luca Merucci4Matteo Picchiani5Marco Chini6Istituto Nazionale di Geofisica e Vulcanologia, CNT, RomeUniversità degli Studi di Modena e Reggio Emilia, Dipartimento di Scienze Chimiche e Geologiche, ModenaIstituto Nazionale di Geofisica e Vulcanologia, CNT, RomeUniversità degli Studi di Modena e Reggio Emilia, Dipartimento di Scienze Chimiche e Geologiche, ModenaIstituto Nazionale di Geofisica e Vulcanologia, CNT, RomeUniversità di Tor Vergata, RomeCentre de Recherche Public-Gabriel Lippmann, Belvaux<div class="page" title="Page 1"><div class="layoutArea"><div class="column"><p><span>In this work the volcanic ash and SO</span><span>2 </span><span>retrievals obtained by applying three different procedures (LUT - Look Up Table, NN - Neural Network and VPR - Volcanic Plume Removal) on MODIS Thermal InfraRed </span><span>(</span><span>TIR) </span>synthetic measurements have been compared. The synthetic measurements are generated using MODTRAN Radiative Transfer Model (RTM) for defined volcanic cloud configurations. The results, presented as the percentage difference between the retrieved ash and SO2 total masses and the true values used for the synthetic data generation, indicate maximum differences of +/- 15% and +/- 10% for all the procedures and for ash and SO2 retrievals respectively. A sensitivity analysis has been also realized to investigate the influence of volcanic cloud altitude and water vapour profile on SO2 retrievals at 7.3 and 8.6 μm. Results confirm the high sensitivity of the 7.3 μm retrieval to the volcanic cloud altitude and show that the SO2 total masses estimated at 7.3 and 8.6 μm separately can be used to improve the information on the plume height. Finally, the water vapour profile is used to compute the minimum altitude over which the 7.3 μm retrieval is effective. </p></div></div></div>http://www.annalsofgeophysics.eu/index.php/annals/article/view/6616 |
| spellingShingle | Stefano Corradini Sergio Pugnaghi Alessandro Piscini Lorenzo Guerrieri Luca Merucci Matteo Picchiani Marco Chini Volcanic Ash and SO2 retrievals using synthetic MODIS TIR data: comparison between inversion procedures and sensitivity analysis Annals of Geophysics |
| title | Volcanic Ash and SO2 retrievals using synthetic MODIS TIR data: comparison between inversion procedures and sensitivity analysis |
| title_full | Volcanic Ash and SO2 retrievals using synthetic MODIS TIR data: comparison between inversion procedures and sensitivity analysis |
| title_fullStr | Volcanic Ash and SO2 retrievals using synthetic MODIS TIR data: comparison between inversion procedures and sensitivity analysis |
| title_full_unstemmed | Volcanic Ash and SO2 retrievals using synthetic MODIS TIR data: comparison between inversion procedures and sensitivity analysis |
| title_short | Volcanic Ash and SO2 retrievals using synthetic MODIS TIR data: comparison between inversion procedures and sensitivity analysis |
| title_sort | volcanic ash and so2 retrievals using synthetic modis tir data comparison between inversion procedures and sensitivity analysis |
| url | http://www.annalsofgeophysics.eu/index.php/annals/article/view/6616 |
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