Satellite Altimetry, Semivariograms, and Seasonal Elevation Changes in the Ablation Zone of West Greenland
Seasonal mean changes in the surface elevation of the ablation zone of West Greenland to 72°N between spring 1985 and summer 1986 are measured using radar altimeter data from the 18-month Geosat Geodetic Mission. Semi-variograms are used to estimate the noise in the data as a function of position on...
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1990
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ftopenaccessrep:oai:zenodo.org:122019 2023-10-29T02:36:41+01:00 Satellite Altimetry, Semivariograms, and Seasonal Elevation Changes in the Ablation Zone of West Greenland Craig S. Lingle H. Jay Zwally Anita C. Brenner 1990-01-01 https://www.openaccessrepository.it/record/122019 https://doi.org/10.3189/s026030550000848x eng eng url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/122019 doi:10.3189/s026030550000848x info:eu-repo/semantics/openAccess NEANIAS Atmospheric Research Community Earth-Surface Processes info:eu-repo/semantics/article publication-article 1990 ftopenaccessrep https://doi.org/10.3189/s026030550000848x 2023-10-03T22:18:03Z Seasonal mean changes in the surface elevation of the ablation zone of West Greenland to 72°N between spring 1985 and summer 1986 are measured using radar altimeter data from the 18-month Geosat Geodetic Mission. Semi-variograms are used to estimate the noise in the data as a function of position on the ice sheet. Mean elevation changes are computed by averaging the elevation differences measured at points where orbits ascending in latitude are later crossed by orbits descending in latitude (or the reverse), with each cross-over difference weighted in proportion to the inverse square of the noise level in the neighborhood of the cross-over point. The mean surface elevation of the ablation zone, relative to spring 1985, ranged from 1.5 ± 0.6 m lower during summer 1985 to 1.7 ± 0.4 m higher during spring 1986. Article in Journal/Newspaper Greenland Ice Sheet Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Annals of Glaciology 14 158 163 |
institution |
Open Polar |
collection |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
English |
topic |
NEANIAS Atmospheric Research Community Earth-Surface Processes |
spellingShingle |
NEANIAS Atmospheric Research Community Earth-Surface Processes Craig S. Lingle H. Jay Zwally Anita C. Brenner Satellite Altimetry, Semivariograms, and Seasonal Elevation Changes in the Ablation Zone of West Greenland |
topic_facet |
NEANIAS Atmospheric Research Community Earth-Surface Processes |
description |
Seasonal mean changes in the surface elevation of the ablation zone of West Greenland to 72°N between spring 1985 and summer 1986 are measured using radar altimeter data from the 18-month Geosat Geodetic Mission. Semi-variograms are used to estimate the noise in the data as a function of position on the ice sheet. Mean elevation changes are computed by averaging the elevation differences measured at points where orbits ascending in latitude are later crossed by orbits descending in latitude (or the reverse), with each cross-over difference weighted in proportion to the inverse square of the noise level in the neighborhood of the cross-over point. The mean surface elevation of the ablation zone, relative to spring 1985, ranged from 1.5 ± 0.6 m lower during summer 1985 to 1.7 ± 0.4 m higher during spring 1986. |
format |
Article in Journal/Newspaper |
author |
Craig S. Lingle H. Jay Zwally Anita C. Brenner |
author_facet |
Craig S. Lingle H. Jay Zwally Anita C. Brenner |
author_sort |
Craig S. Lingle |
title |
Satellite Altimetry, Semivariograms, and Seasonal Elevation Changes in the Ablation Zone of West Greenland |
title_short |
Satellite Altimetry, Semivariograms, and Seasonal Elevation Changes in the Ablation Zone of West Greenland |
title_full |
Satellite Altimetry, Semivariograms, and Seasonal Elevation Changes in the Ablation Zone of West Greenland |
title_fullStr |
Satellite Altimetry, Semivariograms, and Seasonal Elevation Changes in the Ablation Zone of West Greenland |
title_full_unstemmed |
Satellite Altimetry, Semivariograms, and Seasonal Elevation Changes in the Ablation Zone of West Greenland |
title_sort |
satellite altimetry, semivariograms, and seasonal elevation changes in the ablation zone of west greenland |
publishDate |
1990 |
url |
https://www.openaccessrepository.it/record/122019 https://doi.org/10.3189/s026030550000848x |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/122019 doi:10.3189/s026030550000848x |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3189/s026030550000848x |
container_title |
Annals of Glaciology |
container_volume |
14 |
container_start_page |
158 |
op_container_end_page |
163 |
_version_ |
1781060756192624640 |