NissirosV1, Main, Exploration, bibRecord, 000083

Thermal imaging of Nisyros volcano (Aegean Sea) using ASTER data: estimation of radiative heat flux

Identifieur interne : 000083 ( Main/Exploration ); précédent : 000082; suivant : 000084

Thermal imaging of Nisyros volcano (Aegean Sea) using ASTER data: estimation of radiative heat flux

Auteurs : A. Ganas [Grèce] ; E. Lagios [Grèce] ; G. Petropoulos [Royaume-Uni] ; B. Psiloglou [Grèce]

Source :

International journal of remote sensing : (Print) [ 0143-1161 ] ; 2010.

RBID : Pascal:11-0213264

Descripteurs français

Pascal (Inist)
- Imagerie thermique, Zone volcanique, Utilisation, Donnée observation, Estimation, Flux chaleur, Série temporelle, Processus, Nuit, Image, 2001, 2002, 2005, Résultat, Régime permanent, Energie, Libération, Cratère, 1995, 1997, Moyenne, Anomalie thermique, Basse température, LANDSAT, Radiomètre ASTER, Volcan Stromboli, Mer Egée, Ile Vulcano, Italie.
Wicri :
- geographic : Italie.

English descriptors

KwdEn :
- 1995, 1997, 2001, 2002, 2005, Aegean Sea, Average, Estimation, Image, Italy, Landsat, Night, Observation data, Release, Result, Stromboli, Thermal imaging, Time series, Vulcano, craters, energy, heat flux, low temperature, processes, steady regimes, thermal anomalies, utilization, volcanic zones.

Abstract

A time series of Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) images (AST08) have been processed to allow radiative heat flux estimations of the Nisyros volcano. ASTER night-time images were acquired on four different dates: 7 April 2001, 13 June 2002, 26 October 2002 and 23 July 2005. The results show a steady state energy release with heat fluxes ranging from 15 to 30 W m^-2 over the craters of Kaminakia, Polyvotis and Stefanos, respectively. It is suggested that this range of values indicates a background heat flux of this volcano following the unrest of 1995-1997, and that the volcano has entered again into the quiet phase. Also, on the basis of the average spatial extent of the thermal anomaly a total radiative heat flux of 36 MW was estimated at the moment of ASTER overpass. Heat flux values for Nisyros are in good agreement with other published estimates derived from low-temperature fumarolic volcanoes (Stromboli and Vulcano, Italy) using Landsat TM data. It is also evidenced that the ASTER radiometer can be used as an important imaging tool for the monitoring of geophysical properties associated to volcanic activity, as is the volcanic heat flux.

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="en">A time series of Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) images (AST08) have been processed to allow radiative heat flux estimations of the Nisyros volcano. ASTER night-time images were acquired on four different dates: 7 April 2001, 13 June 2002, 26 October 2002 and 23 July 2005. The results show a steady state energy release with heat fluxes ranging from 15 to 30 W m<sup>-2</sup>
 over the craters of Kaminakia, Polyvotis and Stefanos, respectively. It is suggested that this range of values indicates a background heat flux of this volcano following the unrest of 1995-1997, and that the volcano has entered again into the quiet phase. Also, on the basis of the average spatial extent of the thermal anomaly a total radiative heat flux of 36 MW was estimated at the moment of ASTER overpass. Heat flux values for Nisyros are in good agreement with other published estimates derived from low-temperature fumarolic volcanoes (Stromboli and Vulcano, Italy) using Landsat TM data. It is also evidenced that the ASTER radiometer can be used as an important imaging tool for the monitoring of geophysical properties associated to volcanic activity, as is the volcanic heat flux.</div>
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Thermal imaging of Nisyros volcano (Aegean Sea) using ASTER data: estimation of radiative heat flux

Thermal imaging of Nisyros volcano (Aegean Sea) using ASTER data: estimation of radiative heat flux

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri