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Hydrogen supersaturations in the North and South Atlantic - a possible indicator of nitrogen fixation.

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dc.contributor.author Fraser, Michael
dc.date.accessioned 2012-10-30T12:58:05Z
dc.date.available 2012-10-30T12:58:05Z
dc.date.issued 2012-10-30
dc.identifier.uri http://hdl.handle.net/10222/15667
dc.description.abstract It has been demonstrated that nitrogen fixation is a source of hydrogen (H2) to the ocean and therefore measurements of H2 concentrations may be used as a possible indicator of nitrogen fixation (Moore, Punshon, Mahaffey, & Karl, 2009). However, the limited number and sparse distribution of measurements of dissolved hydrogen and nitrogen fixation rates made in the open ocean in the past have made it difficult to quantify the relationship between them. Toward this end, a new method of equilibrating seawater samples for H2 measurement was employed along the 13,000 km Atlantic Meridional Transect (AMT20) from UK to Chile, allowing H¬2 to be measured from underway samples every 3.5 minutes and thereby considerably increasing the number and resolution of H2 measurements made in the open ocean.These high-resolution measurements reveal two regions with high H¬2 concentrations, one in the North Atlantic and one in the South Atlantic. en_US
dc.language.iso en en_US
dc.subject North Atlantic en_US
dc.subject South Atlantic en_US
dc.subject hydrogen en_US
dc.subject indicator en_US
dc.subject trace gases en_US
dc.subject nitrogen fixation en_US
dc.title Hydrogen supersaturations in the North and South Atlantic - a possible indicator of nitrogen fixation. en_US
dc.date.defence 2012-09-18
dc.contributor.department Department of Oceanography en_US
dc.contributor.degree Master of Science en_US
dc.contributor.external-examiner Dr Maurice Levasseur en_US
dc.contributor.graduate-coordinator Dr Daniel Kelley en_US
dc.contributor.thesis-reader Dr John Cullen en_US
dc.contributor.thesis-reader Dr Markus Kienast en_US
dc.contributor.thesis-supervisor Dr Robert Moore en_US
dc.contributor.ethics-approval Not Applicable en_US
dc.contributor.manuscripts Not Applicable en_US
dc.contributor.copyright-release Not Applicable en_US


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