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Surface temperature measurements of active lava flows on Kilauea volcano, Hawai'i.

Pinkerton, Harry and James, Mike and Jones, Alun (2002) Surface temperature measurements of active lava flows on Kilauea volcano, Hawai'i. Journal of Volcanology and Geothermal Research, 113 (1-2). pp. 159-176. ISSN 0377-0273

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    Abstract

    Systematic hand-held radiometer measurements of lava surface temperatures in active flows and tubes on Kilauea volcano, Hawai′i reveal complexities that cannot be resolved in remotely sensed data from aircraft or satellites. Using portable infrared Minolta/Land Cyclops radiometers, we measured surface temperatures of flows at various distances from their sources and investigated cooling rates and the development of crust. Our measurements suggest that the upper surface of these lava flows can be split into a minimum of four thermal components: core (>1050°C), visco-elastic skin (750–900°C), rigid solid crust (<750°C), and flow margins (<175°C). For the ′a′a flows investigated, a cool rigid crust characteristically developed in the central part of channels within 30 m of the source vent and incandescent lava was exposed in the marginal shear zones of channels. This affects the heat loss and morphology of lava in active channels. Our investigations of temperature distributions on pahoehoe flow fields reveal temperature anomalies of up to 150°C above active tubes and tumuli.

    Item Type: Article
    Journal or Publication Title: Journal of Volcanology and Geothermal Research
    Additional Information: The final, definitive version of this article has been published in the Journal of Volcanology and Geothermal Research 113 (1-2), 2002, © ELSEVIER.
    Uncontrolled Keywords: lava ; temperature ; radiometer ; Kilauea ; flow ; remote sensing
    Subjects: Q Science > QE Geology
    Departments: Faculty of Science and Technology > Lancaster Environment Centre
    ID Code: 1458
    Deposited By: Dr Mike R. James
    Deposited On: 11 Feb 2008 16:43
    Refereed?: Yes
    Published?: Published
    Last Modified: 26 Jul 2012 15:15
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/1458

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