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dc.contributor.authorStranne, Christian
dc.contributor.authorSohn, Robert A.
dc.contributor.authorLiljebladh, Bengt
dc.contributor.authorNakamura, Ko-ichi
dc.date.accessioned2010-09-02T13:01:27Z
dc.date.available2010-12-30T09:26:47Z
dc.date.issued2010-06-30
dc.identifier.citationJournal of Geophysical Research 115 (2010): C06028en_US
dc.identifier.urihttp://hdl.handle.net/1912/3894
dc.descriptionAuthor Posting. © American Geophysical Union, 2010. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 115 (2010): C06028, doi:10.1029/2009JC005776.en_US
dc.description.abstractWe use data from a CTD plume-mapping campaign conducted during the Arctic Gakkel Vents (AGAVE) expedition in 2007 to constrain the nature of hydrothermal processes on the Gakkel Ridge at 85°E. Thermal and redox potential (Eh) anomalies were detected in two discrete depth intervals: 2400–2800 m (Interval 1) and 3000–3800 m (Interval 2). The spatial and temporal patterns of the signals indicate that the Interval 1 anomalies were most likely generated by a single large, high-temperature (T > 100°C) vent field located on the fault terraces that form the NE axial valley wall. In contrast, the Interval 2 anomalies appear to have been generated by up to 7 spatially distinct vent fields associated with constructional volcanic features on the floor of the axial valley, many of which may be sites of diffuse, low-temperature (T < 10°C) discharge. Numerical simulations of turbulent plumes rising in a weakly stratified Arctic Ocean water column indicate that the high-temperature field on the axial valley wall has a thermal power of ∼1.8 GW, similar to the Trans-Atlantic Geotraverse and Rainbow fields in the Atlantic Ocean, whereas the sites on the axial valley floor have values ranging from 5 to 110 MW.en_US
dc.description.sponsorshipThiswork was funded by the NSF Office of Polar Programs, Tellus—The Centre of Earth Systems Science at theUniversity of Gothenburg, and the Woods Hole Oceanographic Institution.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttp://dx.doi.org/10.1029/2009JC005776
dc.subjectHydrothermal plumesen_US
dc.subjectGakkel Ridgeen_US
dc.subjectHydrothermal ventsen_US
dc.titleAnalysis and modeling of hydrothermal plume data acquired from the 85°E segment of the Gakkel Ridgeen_US
dc.typeArticleen_US
dc.identifier.doi10.1029/2009JC005776


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