Topographic shading influences cryoconite morphodynamics and carbon exchange.
Journal article
Authors | Cook, J. M., Sweet, Michael J., Cavalli, O., Taggart, A. and Edwards, A. |
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Abstract | Cryoconite holes are the most active and diverse microbial habitats on glacier and ice-sheet surfaces. In this article the authors demonstrate that the shape of cryoconite holes varies depending on ice-surface topography and that this has implications for the carbon cycling regime within. Net ecosystem production is shown to be controlled primarily by sediment thickness within holes. The authors show that irregular hole shapes are indicative of hole migration away from topographic shade, which promotes carbon fixation at the mesoscale on ice surfaces. A cellular automaton is used in conjunction with sediment-delivery experiments to show that migration is the result of simple sediment transfer processes, implying a relationship between ice-surface evolution and cryoconite biogeochemistry that has not previously been examined. |
Keywords | arctic; cryoconite |
Year | 2018 |
Journal | Arctic, Antarctic, and Alpine Research. |
Publisher | Taylor & Francis |
ISSN | 1523-0430 |
1938-4246 | |
Digital Object Identifier (DOI) | https://doi.org/10.1080/15230430.2017.1414463 |
Web address (URL) | https://www.tandfonline.com/doi/full/10.1080/15230430.2017.1414463 |
hdl:10545/623281 | |
Publication dates | 13 Mar 2018 |
Publication process dates | |
Deposited | 11 Jan 2019, 09:14 |
Accepted | 13 Jul 2016 |
Rights | Archived with thanks to Arctic, Antarctic, and Alpine Research |
Contributors | University of Derby, University of Sheffield, Aberystwyth University, Department of Geography, University of Sheffield, Sheffield, UK, Environmental Sustainability Research Centre, College of Life and Natural Science, University of Derby, Derby, UK, Institute of Biological, Rural and Environmental Sciences, Aberystwyth University, Aberystwyth, UK, Department of Geography, University of Sheffield, Sheffield, UK and Institute of Biological, Rural and Environmental Sciences, Aberystwyth University, Aberystwyth, UK |
File | File Access Level Restricted |
File | File Access Level Open |
https://repository.derby.ac.uk/item/93773/topographic-shading-influences-cryoconite-morphodynamics-and-carbon-exchange
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