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Temporal monitoring of Bardarbunga volcanic activity with TanDEM-X

Rossi, Cristian und Minet, Christian und Fritz, Thomas und Eineder, Michael und Erten, Esra (2015) Temporal monitoring of Bardarbunga volcanic activity with TanDEM-X. AGU Fall Meeting 2015, 2015-12-14 - 2015-12-18, San Francisco.

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Kurzfassung

On August 29, 2014, a volcanic activity started in the lava field of Holuhraun, at the north east of the Bardarbunga caldera in Iceland. The activity was declared finished on February 27, 2015, thus lasting for about 6 months. During these months the magma chamber below the caldera slowly emptied, causing the rare event of caldera collapse. In this scenario, TanDEM-X remote sensing data is of particular interest. By producing high-resolution and accurate elevation models of the caldera, it is possible to evaluate volume losses and topographical changes useful to increase the knowledge about the volcanic activity dynamics. 5 TanDEM-X InSAR acquisitions have been commanded between August 01, 2014 and November 08, 2014. 2 acquisitions have been commanded before the eruption and 3 acquisitions afterwards. To fully cover the volcanic activity, also the lava flow area at the north-west of the caldera has been monitored and a couple of acquisitions have been employed to reveal the subglacial graben structure and the lava path. In this context, the expected elevation accuracy is studied on two levels. Absolute height accuracy is analyzed by inspecting the signal propagation at X-band in the imaged medium. Relative height accuracy is analyzed by investigating the InSAR system parameters and the local geomorphology. It is shown how the system is very well accurate with mean height errors below the meter. Moreover, neither InSAR processing issues, e.g. phase unwrapping errors, nor complex DEM calibration aspects are problems to tackle. Caldera is imaged in its entirety and new cauldron formations and, in general, the complete restructuring of the glacial volcanic system is well represented. An impressive caldera volume loss of about 1 billion cubic meters is measured in about two months. The dyke propagation from the Bardarbunga cauldron to the Holuhraun lava field is also revealed and a graben structure with a width of up to 1 km and a sinking of a few meters is derived. These results show how TanDEM-X mission is capable to provide to emergency institutions and geophysicists reliable measures not easy to retrieve with on-site instruments.

elib-URL des Eintrags:https://elib.dlr.de/102463/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Temporal monitoring of Bardarbunga volcanic activity with TanDEM-X
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Rossi, Cristiancristian.rossi (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Minet, Christianchristian.minet (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Fritz, Thomasthomas.fritz (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Eineder, Michaelmichael.eineder (at) dlr.dehttps://orcid.org/0000-0001-5068-1324NICHT SPEZIFIZIERT
Erten, EsraITUNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:Dezember 2015
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:TanDEM-X, DEM, Subglacial volcano, Iceland
Veranstaltungstitel:AGU Fall Meeting 2015
Veranstaltungsort:San Francisco
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:14 Dezember 2015
Veranstaltungsende:18 Dezember 2015
Veranstalter :AGU
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - Projekt TanDEM-X (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Methodik der Fernerkundung > SAR-Signalverarbeitung
Hinterlegt von: Rossi, Cristian
Hinterlegt am:25 Jan 2016 15:20
Letzte Änderung:24 Apr 2024 20:08

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