Image_2_Elevation Changes of West-Central Greenland Glaciers From 1985 to 2012 From Remote Sensing.JPEG
Greenlandic glaciers distinct from the ice sheet make up 12% of the global glacierized area and store about 10% of the global glacier ice volume (Farinotti et al., 2019). However, knowledge about recent climate change-induced volume changes of these 19,000 individual glaciers is limited. The small n...
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ftfrontimediafig:oai:figshare.com:article/11881932 2023-05-15T16:21:01+02:00 Image_2_Elevation Changes of West-Central Greenland Glaciers From 1985 to 2012 From Remote Sensing.JPEG Jacqueline Huber Robert McNabb Michael Zemp 2020-02-21T13:35:02Z https://doi.org/10.3389/feart.2020.00035.s002 https://figshare.com/articles/Image_2_Elevation_Changes_of_West-Central_Greenland_Glaciers_From_1985_to_2012_From_Remote_Sensing_JPEG/11881932 unknown doi:10.3389/feart.2020.00035.s002 https://figshare.com/articles/Image_2_Elevation_Changes_of_West-Central_Greenland_Glaciers_From_1985_to_2012_From_Remote_Sensing_JPEG/11881932 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 glacier elevation changes Greenland periphery TanDEM-X (TDX) remote sensing mass change AeroDEM Image Figure 2020 ftfrontimediafig https://doi.org/10.3389/feart.2020.00035.s002 2020-02-26T23:53:18Z Greenlandic glaciers distinct from the ice sheet make up 12% of the global glacierized area and store about 10% of the global glacier ice volume (Farinotti et al., 2019). However, knowledge about recent climate change-induced volume changes of these 19,000 individual glaciers is limited. The small number of available glaciological and geodetic mass-balance observations have a limited spatial coverage, and the representativeness of these measurements for the region is largely unknown, factors which make a regional assessment of mass balance challenging. Here we use two recently released digital elevation models (DEMs) to assess glacier-wide elevation changes of 1,526 glaciers covering 3,785 km 2 in west-central Greenland: The historical AeroDEM representing the surface in 1985 and a TanDEM-X composite representing 2010–2014. The results show that on average glacier surfaces lowered by about 14.0 ± 4.6 m from 1985 until 2012 or 0.5 ± 0.2 m yr −1 , which is equivalent to a sample mass loss of ~45.1 ± 14.9 Gt in total or 1.7 ± 0.6 Gt yr −1 . Challenges arise from the nature of the DEMs, such as large areas of data voids, fuzzy acquisition dates, and potential radar penetration. We compared several different interpolation methods to assess the best method to fill data voids and constrain unknown survey dates and the associated uncertainties with each method. The potential radar penetration is considered negligible for this assessment in view of the overall glacier changes, the length of the observation period, and the overall uncertainties. A comparison with earlier studies indicates that for glacier change assessments based on ICESat, data selection and averaging methodology strongly influences the results from these spatially limited measurements. This study promotes improved assessments of the contribution of glaciers to sea-level rise and encourages to extend geodetic glacier mass balances to all glaciers on Greenland. Still Image glacier Greenland greenlandic Ice Sheet Frontiers: Figshare Geodetic Glacier ENVELOPE(163.800,163.800,-77.750,-77.750) Greenland |
institution |
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 glacier elevation changes Greenland periphery TanDEM-X (TDX) remote sensing mass change AeroDEM |
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 glacier elevation changes Greenland periphery TanDEM-X (TDX) remote sensing mass change AeroDEM Jacqueline Huber Robert McNabb Michael Zemp Image_2_Elevation Changes of West-Central Greenland Glaciers From 1985 to 2012 From Remote Sensing.JPEG |
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 glacier elevation changes Greenland periphery TanDEM-X (TDX) remote sensing mass change AeroDEM |
description |
Greenlandic glaciers distinct from the ice sheet make up 12% of the global glacierized area and store about 10% of the global glacier ice volume (Farinotti et al., 2019). However, knowledge about recent climate change-induced volume changes of these 19,000 individual glaciers is limited. The small number of available glaciological and geodetic mass-balance observations have a limited spatial coverage, and the representativeness of these measurements for the region is largely unknown, factors which make a regional assessment of mass balance challenging. Here we use two recently released digital elevation models (DEMs) to assess glacier-wide elevation changes of 1,526 glaciers covering 3,785 km 2 in west-central Greenland: The historical AeroDEM representing the surface in 1985 and a TanDEM-X composite representing 2010–2014. The results show that on average glacier surfaces lowered by about 14.0 ± 4.6 m from 1985 until 2012 or 0.5 ± 0.2 m yr −1 , which is equivalent to a sample mass loss of ~45.1 ± 14.9 Gt in total or 1.7 ± 0.6 Gt yr −1 . Challenges arise from the nature of the DEMs, such as large areas of data voids, fuzzy acquisition dates, and potential radar penetration. We compared several different interpolation methods to assess the best method to fill data voids and constrain unknown survey dates and the associated uncertainties with each method. The potential radar penetration is considered negligible for this assessment in view of the overall glacier changes, the length of the observation period, and the overall uncertainties. A comparison with earlier studies indicates that for glacier change assessments based on ICESat, data selection and averaging methodology strongly influences the results from these spatially limited measurements. This study promotes improved assessments of the contribution of glaciers to sea-level rise and encourages to extend geodetic glacier mass balances to all glaciers on Greenland. |
format |
Still Image |
author |
Jacqueline Huber Robert McNabb Michael Zemp |
author_facet |
Jacqueline Huber Robert McNabb Michael Zemp |
author_sort |
Jacqueline Huber |
title |
Image_2_Elevation Changes of West-Central Greenland Glaciers From 1985 to 2012 From Remote Sensing.JPEG |
title_short |
Image_2_Elevation Changes of West-Central Greenland Glaciers From 1985 to 2012 From Remote Sensing.JPEG |
title_full |
Image_2_Elevation Changes of West-Central Greenland Glaciers From 1985 to 2012 From Remote Sensing.JPEG |
title_fullStr |
Image_2_Elevation Changes of West-Central Greenland Glaciers From 1985 to 2012 From Remote Sensing.JPEG |
title_full_unstemmed |
Image_2_Elevation Changes of West-Central Greenland Glaciers From 1985 to 2012 From Remote Sensing.JPEG |
title_sort |
image_2_elevation changes of west-central greenland glaciers from 1985 to 2012 from remote sensing.jpeg |
publishDate |
2020 |
url |
https://doi.org/10.3389/feart.2020.00035.s002 https://figshare.com/articles/Image_2_Elevation_Changes_of_West-Central_Greenland_Glaciers_From_1985_to_2012_From_Remote_Sensing_JPEG/11881932 |
long_lat |
ENVELOPE(163.800,163.800,-77.750,-77.750) |
geographic |
Geodetic Glacier Greenland |
geographic_facet |
Geodetic Glacier Greenland |
genre |
glacier Greenland greenlandic Ice Sheet |
genre_facet |
glacier Greenland greenlandic Ice Sheet |
op_relation |
doi:10.3389/feart.2020.00035.s002 https://figshare.com/articles/Image_2_Elevation_Changes_of_West-Central_Greenland_Glaciers_From_1985_to_2012_From_Remote_Sensing_JPEG/11881932 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/feart.2020.00035.s002 |
_version_ |
1766009031207419904 |