Video_1_Drivers of Recurring Seasonal Cycle of Glacier Calving Styles and Patterns.AVI
Calving is a crucial process for the mass loss of outlet glaciers draining the Greenland ice sheet. Moreover, due to a lack of observations, calving contributes to large uncertainties in current glacier flow models and projections. Here we investigate the frequency, volume and style of calving event...
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ftfrontimediafig:oai:figshare.com:article/14692392 2023-05-15T16:21:21+02:00 Video_1_Drivers of Recurring Seasonal Cycle of Glacier Calving Styles and Patterns.AVI Andrea Kneib-Walter Martin P. Lüthi Luc Moreau Andreas Vieli 2021-05-28T04:55:39Z https://doi.org/10.3389/feart.2021.667717.s002 https://figshare.com/articles/media/Video_1_Drivers_of_Recurring_Seasonal_Cycle_of_Glacier_Calving_Styles_and_Patterns_AVI/14692392 unknown doi:10.3389/feart.2021.667717.s002 https://figshare.com/articles/media/Video_1_Drivers_of_Recurring_Seasonal_Cycle_of_Glacier_Calving_Styles_and_Patterns_AVI/14692392 CC BY 4.0 CC-BY Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change calving glaciers calving tidewater glacier dynamics terrestrial radar interferometer time-lapse imagery meltwater plumes mélange Dataset Media 2021 ftfrontimediafig https://doi.org/10.3389/feart.2021.667717.s002 2021-06-02T23:02:04Z Calving is a crucial process for the mass loss of outlet glaciers draining the Greenland ice sheet. Moreover, due to a lack of observations, calving contributes to large uncertainties in current glacier flow models and projections. Here we investigate the frequency, volume and style of calving events by using high-resolution terrestrial radar interferometer (TRI) data from six field campaigns, continuous daily and hourly time-lapse images over 6 years and 10-s time-lapse images recorded during two field campaigns. The results demonstrate that the calving front of Eqip Sermia, a fast flowing, highly crevassed outlet glacier in West Greenland, follows a clear seasonal cycle showing a distinct pattern in areas with subglacial discharge plumes, shallow bed topography and during the presence and retreat of proglacial ice mélange. Calving event volume, frequency and style vary strongly over time depending on the state in the seasonal cycle. Strong spatial differences between three distinctive front sectors with differing bed topography, water depth and calving front slope were observed. A distinct increase in calving activity occurs in the early melt season simultaneously when ice mélange disappears and meltwater plumes become visible at the fjord surface adjacent to the ice front. While reduced retreat of the front is observed in shallow areas, accelerated retreat occurred at locations with subglacial meltwater plumes. With the emergence of these plumes at the beginning of the melt season, larger full thickness calving events occur likely due to undercutting of the calving front. Later in the melt season the calving activity at subglacial meltwater plumes is similar to the neighboring areas, suggesting the presence of plumes to become less important for calving. The results highlight the significance of subglacial discharge and bed topography on the front geometry, the temporal variability of the calving process and the variability of calving styles. Dataset glacier Greenland Ice Sheet Tidewater Frontiers: Figshare Eqip Sermia ENVELOPE(-50.067,-50.067,69.817,69.817) Greenland |
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Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change calving glaciers calving tidewater glacier dynamics terrestrial radar interferometer time-lapse imagery meltwater plumes mélange |
spellingShingle |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change calving glaciers calving tidewater glacier dynamics terrestrial radar interferometer time-lapse imagery meltwater plumes mélange Andrea Kneib-Walter Martin P. Lüthi Luc Moreau Andreas Vieli Video_1_Drivers of Recurring Seasonal Cycle of Glacier Calving Styles and Patterns.AVI |
topic_facet |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change calving glaciers calving tidewater glacier dynamics terrestrial radar interferometer time-lapse imagery meltwater plumes mélange |
description |
Calving is a crucial process for the mass loss of outlet glaciers draining the Greenland ice sheet. Moreover, due to a lack of observations, calving contributes to large uncertainties in current glacier flow models and projections. Here we investigate the frequency, volume and style of calving events by using high-resolution terrestrial radar interferometer (TRI) data from six field campaigns, continuous daily and hourly time-lapse images over 6 years and 10-s time-lapse images recorded during two field campaigns. The results demonstrate that the calving front of Eqip Sermia, a fast flowing, highly crevassed outlet glacier in West Greenland, follows a clear seasonal cycle showing a distinct pattern in areas with subglacial discharge plumes, shallow bed topography and during the presence and retreat of proglacial ice mélange. Calving event volume, frequency and style vary strongly over time depending on the state in the seasonal cycle. Strong spatial differences between three distinctive front sectors with differing bed topography, water depth and calving front slope were observed. A distinct increase in calving activity occurs in the early melt season simultaneously when ice mélange disappears and meltwater plumes become visible at the fjord surface adjacent to the ice front. While reduced retreat of the front is observed in shallow areas, accelerated retreat occurred at locations with subglacial meltwater plumes. With the emergence of these plumes at the beginning of the melt season, larger full thickness calving events occur likely due to undercutting of the calving front. Later in the melt season the calving activity at subglacial meltwater plumes is similar to the neighboring areas, suggesting the presence of plumes to become less important for calving. The results highlight the significance of subglacial discharge and bed topography on the front geometry, the temporal variability of the calving process and the variability of calving styles. |
format |
Dataset |
author |
Andrea Kneib-Walter Martin P. Lüthi Luc Moreau Andreas Vieli |
author_facet |
Andrea Kneib-Walter Martin P. Lüthi Luc Moreau Andreas Vieli |
author_sort |
Andrea Kneib-Walter |
title |
Video_1_Drivers of Recurring Seasonal Cycle of Glacier Calving Styles and Patterns.AVI |
title_short |
Video_1_Drivers of Recurring Seasonal Cycle of Glacier Calving Styles and Patterns.AVI |
title_full |
Video_1_Drivers of Recurring Seasonal Cycle of Glacier Calving Styles and Patterns.AVI |
title_fullStr |
Video_1_Drivers of Recurring Seasonal Cycle of Glacier Calving Styles and Patterns.AVI |
title_full_unstemmed |
Video_1_Drivers of Recurring Seasonal Cycle of Glacier Calving Styles and Patterns.AVI |
title_sort |
video_1_drivers of recurring seasonal cycle of glacier calving styles and patterns.avi |
publishDate |
2021 |
url |
https://doi.org/10.3389/feart.2021.667717.s002 https://figshare.com/articles/media/Video_1_Drivers_of_Recurring_Seasonal_Cycle_of_Glacier_Calving_Styles_and_Patterns_AVI/14692392 |
long_lat |
ENVELOPE(-50.067,-50.067,69.817,69.817) |
geographic |
Eqip Sermia Greenland |
geographic_facet |
Eqip Sermia Greenland |
genre |
glacier Greenland Ice Sheet Tidewater |
genre_facet |
glacier Greenland Ice Sheet Tidewater |
op_relation |
doi:10.3389/feart.2021.667717.s002 https://figshare.com/articles/media/Video_1_Drivers_of_Recurring_Seasonal_Cycle_of_Glacier_Calving_Styles_and_Patterns_AVI/14692392 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/feart.2021.667717.s002 |
_version_ |
1766009355199578112 |