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Changes in Surface Hydrology on a Land Terminating Section of the Western Greenland ice Sheet Using GIS
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
2011 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

During the last decade signs of enhanced melting due to climate warming have been reported from Greenland. A large amount of surface melt is expected to have an enhancing effect on the ice flow as water reaches the base and reduces friction. This could lead to dynamic thinning and destabilization of the ice sheet. This thesis concerns observations of the surface hydrology of a section of the Western Greenland ice sheet from 2003 to 2009, using remote sensing imagery and GIS as the main tool. The temporal and spatial development of supraglacial lakes is studied since changes in surface hydrology could indicate a change in melt and hence influence the dynamics of the ice. The spatial location of subglacial lakes clearly has a static character. This is expected since their position to a large extent is determined by surface topography resulting from bedrock undulations, meaning that changes over time should be minor. The results show a moderately negative trend over time in the size of surface meltwater features, thus not supporting the reports on enhanced melting.

Place, publisher, year, edition, pages
2011. , p. 31
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URN: urn:nbn:se:uu:diva-355129OAI: oai:DiVA.org:uu-355129DiVA, id: diva2:1225238
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Arkivexemplar i Uppsala universitets arkiv

Available from: 2018-06-26 Created: 2018-06-26 Last updated: 2018-06-26Bibliographically approved

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