Do Glaciers Enhance Organic Carbon Burial?: An Isotopic Approach Linking Continental Weathering, Iron-(oxhydr)oxides and Climate Change.
This thesis explores continental weathering patterns in glacial and non-glacial river catchments in Iceland and Greenland. Specific attention is placed on characterizing the relative iron (oxyhydr)oxide export rates of glacial and non-glacial catchments to the ocean. Total element concentration and...
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ftunidurhamethes:oai:etheses.dur.ac.uk:12131 2023-05-15T16:29:32+02:00 Do Glaciers Enhance Organic Carbon Burial?: An Isotopic Approach Linking Continental Weathering, Iron-(oxhydr)oxides and Climate Change. HAWLEY, SCOTT,MICHAEL 2017 application/pdf http://etheses.dur.ac.uk/12131/ http://etheses.dur.ac.uk/12131/1/HawleyThesisCorrections.pdf unknown oai:etheses.dur.ac.uk:12131 http://etheses.dur.ac.uk/12131/1/HawleyThesisCorrections.pdf HAWLEY, SCOTT,MICHAEL (2017) Do Glaciers Enhance Organic Carbon Burial?: An Isotopic Approach Linking Continental Weathering, Iron-(oxhydr)oxides and Climate Change. Doctoral thesis, Durham University. http://etheses.dur.ac.uk/12131/ Iron stable isotopes climate change glacial weathering Thesis NonPeerReviewed 2017 ftunidurhamethes 2022-09-23T14:16:50Z This thesis explores continental weathering patterns in glacial and non-glacial river catchments in Iceland and Greenland. Specific attention is placed on characterizing the relative iron (oxyhydr)oxide export rates of glacial and non-glacial catchments to the ocean. Total element concentration and iron stable isotope measurements indicate that chemical weathering differences do exist between glacial and non-glacial catchments. The differences appear primarily related to variations in soil formation and organic matter availability between the environments. Physical, rather than chemical, differences between glacial and non-glacial catchments however dominate the relative differences in (oxyhyr)oxide export rates. Glacial and non-glacial river sediments from otherwise analogous terrains contain about the same quantity of iron (oxyhyr)oxide on a weight normalized basis. This equates to glacial rivers exporting far more iron (oxyhyr)oxides on a discharge weighted basis, because glacial rivers contain far higher suspended sediment concentrations that non-glacial rivers. Existing research shows that organic carbon accumulation and burial in marine environments scale directly with iron (oxyhydr)oxide accumulation. This means that shifts in continental weathering over glacial-interglacial cycles drive further changes in marine carbon burial creating a global climate feedback loop. Thesis Greenland Iceland Durham University: Durham e-Theses Greenland |
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Durham University: Durham e-Theses |
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Iron stable isotopes climate change glacial weathering |
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Iron stable isotopes climate change glacial weathering HAWLEY, SCOTT,MICHAEL Do Glaciers Enhance Organic Carbon Burial?: An Isotopic Approach Linking Continental Weathering, Iron-(oxhydr)oxides and Climate Change. |
topic_facet |
Iron stable isotopes climate change glacial weathering |
description |
This thesis explores continental weathering patterns in glacial and non-glacial river catchments in Iceland and Greenland. Specific attention is placed on characterizing the relative iron (oxyhydr)oxide export rates of glacial and non-glacial catchments to the ocean. Total element concentration and iron stable isotope measurements indicate that chemical weathering differences do exist between glacial and non-glacial catchments. The differences appear primarily related to variations in soil formation and organic matter availability between the environments. Physical, rather than chemical, differences between glacial and non-glacial catchments however dominate the relative differences in (oxyhyr)oxide export rates. Glacial and non-glacial river sediments from otherwise analogous terrains contain about the same quantity of iron (oxyhyr)oxide on a weight normalized basis. This equates to glacial rivers exporting far more iron (oxyhyr)oxides on a discharge weighted basis, because glacial rivers contain far higher suspended sediment concentrations that non-glacial rivers. Existing research shows that organic carbon accumulation and burial in marine environments scale directly with iron (oxyhydr)oxide accumulation. This means that shifts in continental weathering over glacial-interglacial cycles drive further changes in marine carbon burial creating a global climate feedback loop. |
format |
Thesis |
author |
HAWLEY, SCOTT,MICHAEL |
author_facet |
HAWLEY, SCOTT,MICHAEL |
author_sort |
HAWLEY, SCOTT,MICHAEL |
title |
Do Glaciers Enhance Organic Carbon Burial?: An Isotopic Approach Linking Continental Weathering, Iron-(oxhydr)oxides and Climate Change. |
title_short |
Do Glaciers Enhance Organic Carbon Burial?: An Isotopic Approach Linking Continental Weathering, Iron-(oxhydr)oxides and Climate Change. |
title_full |
Do Glaciers Enhance Organic Carbon Burial?: An Isotopic Approach Linking Continental Weathering, Iron-(oxhydr)oxides and Climate Change. |
title_fullStr |
Do Glaciers Enhance Organic Carbon Burial?: An Isotopic Approach Linking Continental Weathering, Iron-(oxhydr)oxides and Climate Change. |
title_full_unstemmed |
Do Glaciers Enhance Organic Carbon Burial?: An Isotopic Approach Linking Continental Weathering, Iron-(oxhydr)oxides and Climate Change. |
title_sort |
do glaciers enhance organic carbon burial?: an isotopic approach linking continental weathering, iron-(oxhydr)oxides and climate change. |
publishDate |
2017 |
url |
http://etheses.dur.ac.uk/12131/ http://etheses.dur.ac.uk/12131/1/HawleyThesisCorrections.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Iceland |
genre_facet |
Greenland Iceland |
op_relation |
oai:etheses.dur.ac.uk:12131 http://etheses.dur.ac.uk/12131/1/HawleyThesisCorrections.pdf HAWLEY, SCOTT,MICHAEL (2017) Do Glaciers Enhance Organic Carbon Burial?: An Isotopic Approach Linking Continental Weathering, Iron-(oxhydr)oxides and Climate Change. Doctoral thesis, Durham University. http://etheses.dur.ac.uk/12131/ |
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1766019227439857664 |