Thermal radiance observations of an active lava flow during the June 1984 eruption of Mount Etna

Research Article| October 01, 1990 Thermal radiance observations of an active lava flow during the June 1984 eruption of Mount Etna David C. Pieri; David C. Pieri 1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 Search for other works by this author on: GSW Google Scholar Lori S. Glaze; Lori S. Glaze 1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 Search for other works by this author on: GSW Google Scholar Michael J. Abrams Michael J. Abrams 1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 Search for other works by this author on: GSW Google Scholar Author and Article Information David C. Pieri 1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 Lori S. Glaze 1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 Michael J. Abrams 1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1990) 18 (10): 1018–1022. https://doi.org/10.1130/0091-7613(1990)018<1018:TROOAA>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation David C. Pieri, Lori S. Glaze, Michael J. Abrams; Thermal radiance observations of an active lava flow during the June 1984 eruption of Mount Etna. Geology 1990;; 18 (10): 1018–1022. doi: https://doi.org/10.1130/0091-7613(1990)018<1018:TROOAA>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The thermal budget of an active lava flow observed on 20 June 1984 from the Southeast crater of Mount Etna, Sicily, Italy, was analyzed from data taken by the Landsat Thematic Mapper. The Thematic Mapper images constitute one of the few satellite data sets of sufficient spatial and spectral resolution to allow calibrated measurements on the distribution and intensity of thermal radiation from active lava flows. Using radiance data from two reflective infrared channels, we can estimate the temperature and areas of the hottest parts of the active flow, which correspond to hot (>500 °C) fractures or zones at the flow surface. Using this technique, we estimate that only 10%-20% of the total radiated thermal power output is emitted by hot zones or fractures, which constitute less than 1% of the observed surface area. Generally, it seems that only where hot fractures or zones constitute greater than about 1% of the surface area of the flow will losses from such features significantly reduce internal flow temperatures. Using our radiance observations as boundary conditions for a multicomponent thermal model of flow interior temperature, we infer that, for the parts of this flow subject to analysis, the boundary layer and flow thickness effects dominate over radiant zones in controlling the depression of core temperature. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.