Measuring the state and temporal evolution of glaciers in Alaska and Yukon using synthetic-aperture-radar-derived (SAR-derived) 3D time series of glacier surface flow
Climate change has reduced global ice mass over the last 2 decades as enhanced warming has accelerated surface melt and runoff rates. Glaciers have undergone dynamic processes in response to a warming climate that impacts the surface geometry and mass distribution of glacial ice. Until recently no s...
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ftcopernicus:oai:publications.copernicus.org:tc89505 2023-05-15T16:20:41+02:00 Measuring the state and temporal evolution of glaciers in Alaska and Yukon using synthetic-aperture-radar-derived (SAR-derived) 3D time series of glacier surface flow Samsonov, Sergey Tiampo, Kristy Cassotto, Ryan 2021-09-06 application/pdf https://doi.org/10.5194/tc-15-4221-2021 https://tc.copernicus.org/articles/15/4221/2021/ eng eng doi:10.5194/tc-15-4221-2021 https://tc.copernicus.org/articles/15/4221/2021/ eISSN: 1994-0424 Text 2021 ftcopernicus https://doi.org/10.5194/tc-15-4221-2021 2021-09-13T16:22:29Z Climate change has reduced global ice mass over the last 2 decades as enhanced warming has accelerated surface melt and runoff rates. Glaciers have undergone dynamic processes in response to a warming climate that impacts the surface geometry and mass distribution of glacial ice. Until recently no single technique could consistently measure the evolution of surface flow for an entire glaciated region in three dimensions with high temporal and spatial resolution. We have improved upon earlier methods by developing a technique for mapping, in unprecedented detail, the temporal evolution of glaciers. Our software computes north, east, and vertical flow velocity and/or displacement time series from the synthetic aperture radar (SAR) ascending and descending range and azimuth speckle offsets. The software can handle large volumes of satellite data and is designed to work on high-performance computers (HPCs) as well as workstations by utilizing multiple parallelization methods. We then compute flow velocity–displacement time series for glaciers in southeastern Alaska during 2016–2021 and observe seasonal and interannual variations in flow velocities at Seward and Malaspina glaciers as well as culminating phases of surging at Klutlan, Walsh, and Kluane glaciers. On a broader scale, this technique can be used for reconstructing the response of worldwide glaciers to the warming climate using archived SAR data and for near-real-time monitoring of these glaciers using rapid revisit SAR data from satellites, such as Sentinel-1 (6 or 12 d revisit period) and the forthcoming NISAR mission (12 d revisit period). Text glacier glaciers Alaska Yukon Copernicus Publications: E-Journals Yukon The Cryosphere 15 9 4221 4239 |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Climate change has reduced global ice mass over the last 2 decades as enhanced warming has accelerated surface melt and runoff rates. Glaciers have undergone dynamic processes in response to a warming climate that impacts the surface geometry and mass distribution of glacial ice. Until recently no single technique could consistently measure the evolution of surface flow for an entire glaciated region in three dimensions with high temporal and spatial resolution. We have improved upon earlier methods by developing a technique for mapping, in unprecedented detail, the temporal evolution of glaciers. Our software computes north, east, and vertical flow velocity and/or displacement time series from the synthetic aperture radar (SAR) ascending and descending range and azimuth speckle offsets. The software can handle large volumes of satellite data and is designed to work on high-performance computers (HPCs) as well as workstations by utilizing multiple parallelization methods. We then compute flow velocity–displacement time series for glaciers in southeastern Alaska during 2016–2021 and observe seasonal and interannual variations in flow velocities at Seward and Malaspina glaciers as well as culminating phases of surging at Klutlan, Walsh, and Kluane glaciers. On a broader scale, this technique can be used for reconstructing the response of worldwide glaciers to the warming climate using archived SAR data and for near-real-time monitoring of these glaciers using rapid revisit SAR data from satellites, such as Sentinel-1 (6 or 12 d revisit period) and the forthcoming NISAR mission (12 d revisit period). |
format |
Text |
author |
Samsonov, Sergey Tiampo, Kristy Cassotto, Ryan |
spellingShingle |
Samsonov, Sergey Tiampo, Kristy Cassotto, Ryan Measuring the state and temporal evolution of glaciers in Alaska and Yukon using synthetic-aperture-radar-derived (SAR-derived) 3D time series of glacier surface flow |
author_facet |
Samsonov, Sergey Tiampo, Kristy Cassotto, Ryan |
author_sort |
Samsonov, Sergey |
title |
Measuring the state and temporal evolution of glaciers in Alaska and Yukon using synthetic-aperture-radar-derived (SAR-derived) 3D time series of glacier surface flow |
title_short |
Measuring the state and temporal evolution of glaciers in Alaska and Yukon using synthetic-aperture-radar-derived (SAR-derived) 3D time series of glacier surface flow |
title_full |
Measuring the state and temporal evolution of glaciers in Alaska and Yukon using synthetic-aperture-radar-derived (SAR-derived) 3D time series of glacier surface flow |
title_fullStr |
Measuring the state and temporal evolution of glaciers in Alaska and Yukon using synthetic-aperture-radar-derived (SAR-derived) 3D time series of glacier surface flow |
title_full_unstemmed |
Measuring the state and temporal evolution of glaciers in Alaska and Yukon using synthetic-aperture-radar-derived (SAR-derived) 3D time series of glacier surface flow |
title_sort |
measuring the state and temporal evolution of glaciers in alaska and yukon using synthetic-aperture-radar-derived (sar-derived) 3d time series of glacier surface flow |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-4221-2021 https://tc.copernicus.org/articles/15/4221/2021/ |
geographic |
Yukon |
geographic_facet |
Yukon |
genre |
glacier glaciers Alaska Yukon |
genre_facet |
glacier glaciers Alaska Yukon |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-15-4221-2021 https://tc.copernicus.org/articles/15/4221/2021/ |
op_doi |
https://doi.org/10.5194/tc-15-4221-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
9 |
container_start_page |
4221 |
op_container_end_page |
4239 |
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1766008637621272576 |