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  Combining LEO and GEO sensors for improved detection of volcanic plumes in the context of the SACS early warning system

Brenot, H., Theys, N., Clarisse, L., de Buyl, P., van Gent, J., Clerbaux, N., Van Roozendael, M. (2023): Combining LEO and GEO sensors for improved detection of volcanic plumes in the context of the SACS early warning system, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-0443

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Item Permalink: https://gfzpublic.gfz.de/pubman/item/item_5015996 Version Permalink: https://gfzpublic.gfz.de/pubman/item/item_5015996_1
Genre: Conference Paper

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 Creators:
Brenot, Hugues1, Author
Theys, Nicolas1, Author
Clarisse, Lieven1, Author
de Buyl, Pierre1, Author
van Gent, Jeroen1, Author
Clerbaux, Nicolas1, Author
Van Roozendael, Michel1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: Volcanic eruptions pose a significant threat to humans. Near real-time satellite observations of ash and SO2 are critical for improving situational awareness and mitigating the risk of volcanic plumes (i.e., ash and SO2). This study focuses on combining LEO and GEO satellite observations to improve the detection of volcanic plumes, as part of an early warning system for aviation stakeholders and research scientists known as the “Support to Aviation Control Service” (SACS, http://sacs.aeronomie.be). Infrared and ultraviolet hyperspectral sensors onboard polar orbiting LEO platforms (e.g., IASI and TROPOMI) perform selective detection of volcanic ash and SO2 (column and height). The disadvantage is the limited number of overpasses per day over the same region. The GEO imagers have the advantage of providing observations with a high temporal/spatial resolution. RGB composite is commonly used by the observatories and the Volcanic Ash Advisory Centres. The inherent limitation by using such products is the lack of discrimination between desert dust, volcanic ash and convective clouds. Two covariance-based retrieval algorithms (COBRA) have been developed and applied on SEVIRI data to detect 1) mineral dusts and 2) volcanic SO2. Results will be shown for recent events. In case of detection, SACS system sends email notifications and creates alert data products in homogenised format, providing key information to users (i.e., the location of alert pixels, gridded data, mass loading).

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Language(s): eng - English
 Dates: 2023
 Publication Status: Finally published
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-0443
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
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