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dc.contributor.authorWhite, Sheri N.  Concept link
dc.coverage.spatialEast Pacific Rise
dc.coverage.spatialJuan de Fuca Ridge
dc.date.accessioned2010-11-03T15:23:46Z
dc.date.available2010-11-03T15:23:46Z
dc.date.issued2000-06
dc.identifier.urihttps://hdl.handle.net/1912/4053
dc.descriptionSubmitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution June 2000en_US
dc.description.abstractA spectral camera (ALISS - Ambient Light Imaging and Spectral System) was used to image ambient light from high-temperature vents at 9°N East Pacific Rise and the Juan de Fuca Ridge during 1997 and 1998 Alvin dive cruises. ALISS is a low-light digital camera with custom-designed optics. A set of nine lenses, each covered by an individual bandpass filter (50 and 100 nm nominal bandwidths), allows vents to be imaged in nine wavelength bands simultaneously spanning the range of 400-1 000 nm. Thus, both spatial and spectral information are obtained. ALISS was used to image three types of vents: black smokers, flange pools, and beehives. The primary source of light is thermal radiation due to the high temperature of the hydrothermal fluid (-350°C). This light is dominant at wavelengths greater than 700 nm. At flange pools, where the fluid is relatively stable, only thermal radiation is present. Black smokers and beehives, however, are subject to mixing with ambient seawater (2°C) leading to mineral precipitation. Data from these types of vents show the existence of non-thermal, temporally varying light in the 400-700 nm region. This light is probably caused by mechanisms related to mixing and precipitation, such as chemiluminescence, crystalloluminescence and triboluminescence.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherMassachusetts Institute of Technology and Woods Hole Oceanographic Institutionen_US
dc.relation.ispartofseriesWHOI Thesesen_US
dc.subjectHydrothermal ventsen_US
dc.subjectThermoluminescenceen_US
dc.subjectThermoluminescence dosimetryen_US
dc.subjectUnderwater imaging systemsen_US
dc.titleAn investigation into the characteristics and sources of light emission at deep-sea hydrothermal ventsen_US
dc.typeThesisen_US
dc.identifier.doi10.1575/1912/4053


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