Influence of synoptic scale weather variability on ice speed-up events in Southwest Greenland ...
The Greenland Ice Sheet (GrIS) has experienced increasing ice loss in the past decades and the trend is expected to continue due to climate change. However, large uncertainties about the magnitude of Greenland’s future ice loss remain. One process that contributes to this uncertainty are transient i...
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ftdatacite:10.3929/ethz-b-000561596 2024-04-28T08:19:50+00:00 Influence of synoptic scale weather variability on ice speed-up events in Southwest Greenland ... Schmid, Timo 2021 application/pdf https://dx.doi.org/10.3929/ethz-b-000561596 http://hdl.handle.net/20.500.11850/561596 en eng ETH Zurich Greenland ice sheet Atmospheric dynamics Glaciology article-journal Text Master Thesis ScholarlyArticle 2021 ftdatacite https://doi.org/10.3929/ethz-b-000561596 2024-04-02T12:32:08Z The Greenland Ice Sheet (GrIS) has experienced increasing ice loss in the past decades and the trend is expected to continue due to climate change. However, large uncertainties about the magnitude of Greenland’s future ice loss remain. One process that contributes to this uncertainty are transient ice accelerations, so-called ice speed-up events, caused by a short-term increase in rain-/meltwater, which descends to the glacier bed and can enhance basal sliding. Here, we investigate this phenomenon focusing on two main objectives. First, we present an analysis of local conditions on the Russell glacier in Southwest Greenland, which confirms the importance of meltwater variability for ice speed-up events. We find the strongest influence in early summer with correlations between surface melt and ice velocities above 0.8 in May and identify a typical lag of zero to one day between meltwater peaks and their ice velocity responses. Contrastingly, we find rainfall to have a minor influence with only 4 out of 51 ice ... Text glacier Greenland Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
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English |
topic |
Greenland ice sheet Atmospheric dynamics Glaciology |
spellingShingle |
Greenland ice sheet Atmospheric dynamics Glaciology Schmid, Timo Influence of synoptic scale weather variability on ice speed-up events in Southwest Greenland ... |
topic_facet |
Greenland ice sheet Atmospheric dynamics Glaciology |
description |
The Greenland Ice Sheet (GrIS) has experienced increasing ice loss in the past decades and the trend is expected to continue due to climate change. However, large uncertainties about the magnitude of Greenland’s future ice loss remain. One process that contributes to this uncertainty are transient ice accelerations, so-called ice speed-up events, caused by a short-term increase in rain-/meltwater, which descends to the glacier bed and can enhance basal sliding. Here, we investigate this phenomenon focusing on two main objectives. First, we present an analysis of local conditions on the Russell glacier in Southwest Greenland, which confirms the importance of meltwater variability for ice speed-up events. We find the strongest influence in early summer with correlations between surface melt and ice velocities above 0.8 in May and identify a typical lag of zero to one day between meltwater peaks and their ice velocity responses. Contrastingly, we find rainfall to have a minor influence with only 4 out of 51 ice ... |
format |
Text |
author |
Schmid, Timo |
author_facet |
Schmid, Timo |
author_sort |
Schmid, Timo |
title |
Influence of synoptic scale weather variability on ice speed-up events in Southwest Greenland ... |
title_short |
Influence of synoptic scale weather variability on ice speed-up events in Southwest Greenland ... |
title_full |
Influence of synoptic scale weather variability on ice speed-up events in Southwest Greenland ... |
title_fullStr |
Influence of synoptic scale weather variability on ice speed-up events in Southwest Greenland ... |
title_full_unstemmed |
Influence of synoptic scale weather variability on ice speed-up events in Southwest Greenland ... |
title_sort |
influence of synoptic scale weather variability on ice speed-up events in southwest greenland ... |
publisher |
ETH Zurich |
publishDate |
2021 |
url |
https://dx.doi.org/10.3929/ethz-b-000561596 http://hdl.handle.net/20.500.11850/561596 |
genre |
glacier Greenland Ice Sheet |
genre_facet |
glacier Greenland Ice Sheet |
op_doi |
https://doi.org/10.3929/ethz-b-000561596 |
_version_ |
1797583110720716800 |