Changes in Fe Oxidation Rate in Hydrothermal Plumes as a Potential Driver of Enhanced Hydrothermal Input to Near-Ridge Sediments During Glacial Terminations
| dc.contributor.author | Cullen, J.T. | |
| dc.contributor.author | Coogan, L.A. | |
| dc.date.accessioned | 2018-09-27T18:39:33Z | |
| dc.date.available | 2018-09-27T18:39:33Z | |
| dc.date.copyright | 2017 | en_US |
| dc.date.issued | 2017 | |
| dc.description.abstract | Recent studies have hypothesized that changes in sea level due to glacial‐interglacial cycles lead to changes in the rate of melt addition to the crust at mid‐ocean ridges with globally significant consequences. Arguably the most compelling evidence for this comes from increases in the hydrothermal component in near‐ridge sediments during glacial‐interglacial transitions. Here we explore the hypothesis that changes in ocean bottom water [O2] and pH across glacial‐interglacial transitions would lead to changes in the rate of Fe oxidation in hydrothermal plumes. A simple model shows that a several fold increase in the rate of Fe oxidation is expected at glacial‐interglacial transitions. Uncertainty in bottom water chemistry and the relationship between oxidation and sedimentation rates prevent direct comparison of the model and data. However, it appears that the null hypothesis of invariant hydrothermal vent fluxes into ocean bottom water that changed in O2 content and pH across these transitions cannot currently be discounted. | en_US |
| dc.description.reviewstatus | Reviewed | en_US |
| dc.description.scholarlevel | Faculty | en_US |
| dc.description.sponsorship | J. T. C. and L. A. C. were supported by the Natural Sciences and Engineering Research Council of Canada. | en_US |
| dc.identifier.citation | Cullen, J.T. & Coogan, L.A. (2017). Changes in Fe Oxidation Rate in Hydrothermal Plumes as a Potential Driver of Enhanced Hydrothermal Input to Near-Ridge Sediments During Glacial Terminations. Geophysical Research Letters, 44(23), 11,951–11,958. https://doi.org/10.1002/2017GL074609 | en_US |
| dc.identifier.uri | https://doi.org/10.1002/2017GL074609 | |
| dc.identifier.uri | http://hdl.handle.net/1828/10100 | |
| dc.language.iso | en | en_US |
| dc.publisher | Geophysical Research Letters | en_US |
| dc.subject | iron | |
| dc.subject | hydrothernal vents | |
| dc.subject | mid-ocean ridges | |
| dc.subject | oxidation rate | |
| dc.subject | glacial-interglacial cycles | |
| dc.subject.department | School of Earth and Ocean Sciences | |
| dc.title | Changes in Fe Oxidation Rate in Hydrothermal Plumes as a Potential Driver of Enhanced Hydrothermal Input to Near-Ridge Sediments During Glacial Terminations | en_US |
| dc.type | Article | en_US |