Image_1_Drivers of Recurring Seasonal Cycle of Glacier Calving Styles and Patterns.PDF
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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ftsmithonian:oai:figshare.com:article/14692389 2023-05-15T16:21:21+02:00 Image_1_Drivers of Recurring Seasonal Cycle of Glacier Calving Styles and Patterns.PDF Andrea Kneib-Walter (10887531) Martin P. Lüthi (6945713) Luc Moreau (3689335) Andreas Vieli (7241141) 2021-05-28T04:55:39Z https://doi.org/10.3389/feart.2021.667717.s001 unknown https://figshare.com/articles/figure/Image_1_Drivers_of_Recurring_Seasonal_Cycle_of_Glacier_Calving_Styles_and_Patterns_PDF/14692389 doi:10.3389/feart.2021.667717.s001 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 Image Figure 2021 ftsmithonian https://doi.org/10.3389/feart.2021.667717.s001 2021-06-13T15:41:55Z 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. Still Image glacier Greenland Ice Sheet Tidewater Unknown Eqip Sermia ENVELOPE(-50.067,-50.067,69.817,69.817) Greenland |
institution |
Open Polar |
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Unknown |
op_collection_id |
ftsmithonian |
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 (10887531) Martin P. Lüthi (6945713) Luc Moreau (3689335) Andreas Vieli (7241141) Image_1_Drivers of Recurring Seasonal Cycle of Glacier Calving Styles and Patterns.PDF |
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 |
Still Image |
author |
Andrea Kneib-Walter (10887531) Martin P. Lüthi (6945713) Luc Moreau (3689335) Andreas Vieli (7241141) |
author_facet |
Andrea Kneib-Walter (10887531) Martin P. Lüthi (6945713) Luc Moreau (3689335) Andreas Vieli (7241141) |
author_sort |
Andrea Kneib-Walter (10887531) |
title |
Image_1_Drivers of Recurring Seasonal Cycle of Glacier Calving Styles and Patterns.PDF |
title_short |
Image_1_Drivers of Recurring Seasonal Cycle of Glacier Calving Styles and Patterns.PDF |
title_full |
Image_1_Drivers of Recurring Seasonal Cycle of Glacier Calving Styles and Patterns.PDF |
title_fullStr |
Image_1_Drivers of Recurring Seasonal Cycle of Glacier Calving Styles and Patterns.PDF |
title_full_unstemmed |
Image_1_Drivers of Recurring Seasonal Cycle of Glacier Calving Styles and Patterns.PDF |
title_sort |
image_1_drivers of recurring seasonal cycle of glacier calving styles and patterns.pdf |
publishDate |
2021 |
url |
https://doi.org/10.3389/feart.2021.667717.s001 |
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 |
https://figshare.com/articles/figure/Image_1_Drivers_of_Recurring_Seasonal_Cycle_of_Glacier_Calving_Styles_and_Patterns_PDF/14692389 doi:10.3389/feart.2021.667717.s001 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/feart.2021.667717.s001 |
_version_ |
1766009354684727296 |