Volcanic Ash and SO2 retrievals using synthetic MODIS TIR data: comparison between inversion procedures and sensitivity analysis
Item
Title (Dublin Core)
Volcanic Ash and SO2 retrievals using synthetic MODIS TIR data: comparison between inversion procedures and sensitivity analysis
Description (Dublin Core)
<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>
Creator (Dublin Core)
Stefano Corradini
Sergio Pugnaghi
Alessandro Piscini
Lorenzo Guerrieri
Luca Merucci
Matteo Picchiani
Marco Chini
Subject (Dublin Core)
Meteorology. Climatology
QC851-999
Geophysics. Cosmic physics
QC801-809
Publisher (Dublin Core)
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Date (Dublin Core)
2015-02-01T00:00:00Z
Type (Dublin Core)
article
Identifier (Dublin Core)
1593-5213
2037-416X
10.4401/ag-6616
https://doaj.org/article/44f0bf14fc674f8eb7d03fe8ca946e0c
Source (Dublin Core)
Annals of Geophysics, Vol 57, Iss 0 (2015)
Language (Dublin Core)
EN
Relation (Dublin Core)
http://www.annalsofgeophysics.eu/index.php/annals/article/view/6616
https://doaj.org/toc/1593-5213
https://doaj.org/toc/2037-416X
Provenance (Dublin Core)
Journal Licence: CC BY