A SAR Record of Early 21(st) Century Change in Greenland
Glaciers in Greenland are changing rapidly. To better understand these changes, we have produced a series of seven synthetic-aperture-radar (SAR) backscatter mosaics for seven winters during the period from 2000 to 2013. Six of the mosaics were created using RADARSAT Fine-Beam data and the seventh u...
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ftpubmed:oai:pubmedcentral.nih.gov:6582974 2023-05-15T16:26:44+02:00 A SAR Record of Early 21(st) Century Change in Greenland Joughin, Ian Smith, Ben E. Howat, Ian M. Moon, Twila Scambos, Ted A. 2016-03-16 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6582974/ https://doi.org/10.1017/jog.2016.10 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6582974/ http://dx.doi.org/10.1017/jog.2016.10 Article Text 2016 ftpubmed https://doi.org/10.1017/jog.2016.10 2019-06-23T00:39:37Z Glaciers in Greenland are changing rapidly. To better understand these changes, we have produced a series of seven synthetic-aperture-radar (SAR) backscatter mosaics for seven winters during the period from 2000 to 2013. Six of the mosaics were created using RADARSAT Fine-Beam data and the seventh used ALOS PALSAR Fine-Beam Single-Polarization data. The RADARSAT mosaics are radiometrically calibrated and capture changes in the backscatter coefficient related to melt and other events, particularly the strong melting in the summer of 2012. Comparison of features in the ascending-orbit ALOS mosaic and the descending-orbit RADARSAT mosaics indicate that in areas of smooth to moderate topography their locations are consistent to within a few 10s of meters. The locations of features identifiable in the RADARAT mosaics, which were collected with the same imaging parameters, generally agree to within better than the 20-m posting of the data. With such geometric accuracy, these data establish a record of change in Greenland for the early part of the 21(st) Century, thus providing a baseline that can be compared with new radar and optical data sets. Text Greenland PubMed Central (PMC) Greenland Journal of Glaciology 62 231 62 71 |
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Article Joughin, Ian Smith, Ben E. Howat, Ian M. Moon, Twila Scambos, Ted A. A SAR Record of Early 21(st) Century Change in Greenland |
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Article |
description |
Glaciers in Greenland are changing rapidly. To better understand these changes, we have produced a series of seven synthetic-aperture-radar (SAR) backscatter mosaics for seven winters during the period from 2000 to 2013. Six of the mosaics were created using RADARSAT Fine-Beam data and the seventh used ALOS PALSAR Fine-Beam Single-Polarization data. The RADARSAT mosaics are radiometrically calibrated and capture changes in the backscatter coefficient related to melt and other events, particularly the strong melting in the summer of 2012. Comparison of features in the ascending-orbit ALOS mosaic and the descending-orbit RADARSAT mosaics indicate that in areas of smooth to moderate topography their locations are consistent to within a few 10s of meters. The locations of features identifiable in the RADARAT mosaics, which were collected with the same imaging parameters, generally agree to within better than the 20-m posting of the data. With such geometric accuracy, these data establish a record of change in Greenland for the early part of the 21(st) Century, thus providing a baseline that can be compared with new radar and optical data sets. |
format |
Text |
author |
Joughin, Ian Smith, Ben E. Howat, Ian M. Moon, Twila Scambos, Ted A. |
author_facet |
Joughin, Ian Smith, Ben E. Howat, Ian M. Moon, Twila Scambos, Ted A. |
author_sort |
Joughin, Ian |
title |
A SAR Record of Early 21(st) Century Change in Greenland |
title_short |
A SAR Record of Early 21(st) Century Change in Greenland |
title_full |
A SAR Record of Early 21(st) Century Change in Greenland |
title_fullStr |
A SAR Record of Early 21(st) Century Change in Greenland |
title_full_unstemmed |
A SAR Record of Early 21(st) Century Change in Greenland |
title_sort |
sar record of early 21(st) century change in greenland |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6582974/ https://doi.org/10.1017/jog.2016.10 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6582974/ http://dx.doi.org/10.1017/jog.2016.10 |
op_doi |
https://doi.org/10.1017/jog.2016.10 |
container_title |
Journal of Glaciology |
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62 |
container_issue |
231 |
container_start_page |
62 |
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71 |
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1766015692796067840 |