Land-ice elevation changes from photon-counting swath altimetry: first applications over the Antarctic ice sheet
International audience Satellite altimetric time series allow high-precision monitoring of ice-sheet mass balance. Understanding elevation changes in these regions is important because outlet glaciers along ice-sheet margins are critical in controlling flow of inland ice. Here we discuss a new airbo...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2015
|
Subjects: | |
Online Access: | https://hal-insu.archives-ouvertes.fr/insu-01164726 https://hal-insu.archives-ouvertes.fr/insu-01164726/document https://hal-insu.archives-ouvertes.fr/insu-01164726/file/land-ice-elevation-changes-from-photon-counting-swath-altimetry-first-applications-over-the-antarctic-ice-sheet.pdf https://doi.org/10.3189/2015JoG14J048 |
id |
ftccsdartic:oai:HAL:insu-01164726v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
AEROGEOPHYSICAL MEASUREMENTS ANTARCTIC GLACIOLOGY GLACIER MAPPING GLACIOLOGICAL INSTRUMENTS AND METHODS ICE-SHEET MASS BALANCE [SDU]Sciences of the Universe [physics] [SDE]Environmental Sciences |
spellingShingle |
AEROGEOPHYSICAL MEASUREMENTS ANTARCTIC GLACIOLOGY GLACIER MAPPING GLACIOLOGICAL INSTRUMENTS AND METHODS ICE-SHEET MASS BALANCE [SDU]Sciences of the Universe [physics] [SDE]Environmental Sciences Young, Duncan Greenbaum, J. S. Blankenship, D.D. lindzey, laura Garcia de gorordo, alvaro Kempf, S. roberts, jason Warner, Roland C. Van Ommen, Tas Siegert, Martin Le Meur, Emmanuel Land-ice elevation changes from photon-counting swath altimetry: first applications over the Antarctic ice sheet |
topic_facet |
AEROGEOPHYSICAL MEASUREMENTS ANTARCTIC GLACIOLOGY GLACIER MAPPING GLACIOLOGICAL INSTRUMENTS AND METHODS ICE-SHEET MASS BALANCE [SDU]Sciences of the Universe [physics] [SDE]Environmental Sciences |
description |
International audience Satellite altimetric time series allow high-precision monitoring of ice-sheet mass balance. Understanding elevation changes in these regions is important because outlet glaciers along ice-sheet margins are critical in controlling flow of inland ice. Here we discuss a new airborne altimetry dataset collected as part of the ICECAP (International Collaborative Exploration of the Cryosphere by Airborne Profiling) project over East Antarctica. Using the ALAMO (Airborne Laser Altimeter with Mapping Optics) system of a scanning photon-counting lidar combined with a laser altimeter, we extend the 2003–09 surface elevation record of NASA's ICESat satellite, by determining cross-track slope and thus independently correcting for ICESat's cross-track pointing errors. In areas of high slope, cross-track errors result in measured elevation change that combines surface slope and the actual Δz/Δt signal. Slope corrections are particularly important in coastal ice streams, which often exhibit both rapidly changing elevations and high surface slopes. As a test case (assuming that surface slopes do not change significantly) we observe a lack of ice dynamic change at Cook Ice Shelf, while significant thinning occurred at Totten and Denman Glaciers during 2003–09. |
author2 |
Institute for Geophysics University of Texas at Dallas Richardson (UT Dallas) Laboratory for Atmospheric and Space Physics Boulder (LASP) University of Colorado Boulder Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Young, Duncan Greenbaum, J. S. Blankenship, D.D. lindzey, laura Garcia de gorordo, alvaro Kempf, S. roberts, jason Warner, Roland C. Van Ommen, Tas Siegert, Martin Le Meur, Emmanuel |
author_facet |
Young, Duncan Greenbaum, J. S. Blankenship, D.D. lindzey, laura Garcia de gorordo, alvaro Kempf, S. roberts, jason Warner, Roland C. Van Ommen, Tas Siegert, Martin Le Meur, Emmanuel |
author_sort |
Young, Duncan |
title |
Land-ice elevation changes from photon-counting swath altimetry: first applications over the Antarctic ice sheet |
title_short |
Land-ice elevation changes from photon-counting swath altimetry: first applications over the Antarctic ice sheet |
title_full |
Land-ice elevation changes from photon-counting swath altimetry: first applications over the Antarctic ice sheet |
title_fullStr |
Land-ice elevation changes from photon-counting swath altimetry: first applications over the Antarctic ice sheet |
title_full_unstemmed |
Land-ice elevation changes from photon-counting swath altimetry: first applications over the Antarctic ice sheet |
title_sort |
land-ice elevation changes from photon-counting swath altimetry: first applications over the antarctic ice sheet |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal-insu.archives-ouvertes.fr/insu-01164726 https://hal-insu.archives-ouvertes.fr/insu-01164726/document https://hal-insu.archives-ouvertes.fr/insu-01164726/file/land-ice-elevation-changes-from-photon-counting-swath-altimetry-first-applications-over-the-antarctic-ice-sheet.pdf https://doi.org/10.3189/2015JoG14J048 |
long_lat |
ENVELOPE(152.500,152.500,-68.667,-68.667) |
geographic |
Antarctic Cook Ice Shelf East Antarctica The Antarctic |
geographic_facet |
Antarctic Cook Ice Shelf East Antarctica The Antarctic |
genre |
Antarc* Antarctic Antarctica Cook Ice Shelf East Antarctica Ice Sheet Ice Shelf Journal of Glaciology |
genre_facet |
Antarc* Antarctic Antarctica Cook Ice Shelf East Antarctica Ice Sheet Ice Shelf Journal of Glaciology |
op_source |
ISSN: 0022-1430 Journal of Glaciology https://hal-insu.archives-ouvertes.fr/insu-01164726 Journal of Glaciology, International Glaciological Society, 2015, 61 (225), pp.17-28. ⟨10.3189/2015JoG14J048⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3189/2015JoG14J048 insu-01164726 https://hal-insu.archives-ouvertes.fr/insu-01164726 https://hal-insu.archives-ouvertes.fr/insu-01164726/document https://hal-insu.archives-ouvertes.fr/insu-01164726/file/land-ice-elevation-changes-from-photon-counting-swath-altimetry-first-applications-over-the-antarctic-ice-sheet.pdf doi:10.3189/2015JoG14J048 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/ info:eu-repo/semantics/OpenAccess |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.3189/2015JoG14J048 |
container_title |
Journal of Glaciology |
container_volume |
61 |
container_issue |
225 |
container_start_page |
17 |
op_container_end_page |
28 |
_version_ |
1766199809201405952 |
spelling |
ftccsdartic:oai:HAL:insu-01164726v1 2023-05-15T13:44:17+02:00 Land-ice elevation changes from photon-counting swath altimetry: first applications over the Antarctic ice sheet Young, Duncan Greenbaum, J. S. Blankenship, D.D. lindzey, laura Garcia de gorordo, alvaro Kempf, S. roberts, jason Warner, Roland C. Van Ommen, Tas Siegert, Martin Le Meur, Emmanuel Institute for Geophysics University of Texas at Dallas Richardson (UT Dallas) Laboratory for Atmospheric and Space Physics Boulder (LASP) University of Colorado Boulder Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) 2015-02 https://hal-insu.archives-ouvertes.fr/insu-01164726 https://hal-insu.archives-ouvertes.fr/insu-01164726/document https://hal-insu.archives-ouvertes.fr/insu-01164726/file/land-ice-elevation-changes-from-photon-counting-swath-altimetry-first-applications-over-the-antarctic-ice-sheet.pdf https://doi.org/10.3189/2015JoG14J048 en eng HAL CCSD International Glaciological Society info:eu-repo/semantics/altIdentifier/doi/10.3189/2015JoG14J048 insu-01164726 https://hal-insu.archives-ouvertes.fr/insu-01164726 https://hal-insu.archives-ouvertes.fr/insu-01164726/document https://hal-insu.archives-ouvertes.fr/insu-01164726/file/land-ice-elevation-changes-from-photon-counting-swath-altimetry-first-applications-over-the-antarctic-ice-sheet.pdf doi:10.3189/2015JoG14J048 http://creativecommons.org/licenses/by-nc-nd/ info:eu-repo/semantics/OpenAccess CC-BY-NC-ND ISSN: 0022-1430 Journal of Glaciology https://hal-insu.archives-ouvertes.fr/insu-01164726 Journal of Glaciology, International Glaciological Society, 2015, 61 (225), pp.17-28. ⟨10.3189/2015JoG14J048⟩ AEROGEOPHYSICAL MEASUREMENTS ANTARCTIC GLACIOLOGY GLACIER MAPPING GLACIOLOGICAL INSTRUMENTS AND METHODS ICE-SHEET MASS BALANCE [SDU]Sciences of the Universe [physics] [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2015 ftccsdartic https://doi.org/10.3189/2015JoG14J048 2021-11-27T23:27:28Z International audience Satellite altimetric time series allow high-precision monitoring of ice-sheet mass balance. Understanding elevation changes in these regions is important because outlet glaciers along ice-sheet margins are critical in controlling flow of inland ice. Here we discuss a new airborne altimetry dataset collected as part of the ICECAP (International Collaborative Exploration of the Cryosphere by Airborne Profiling) project over East Antarctica. Using the ALAMO (Airborne Laser Altimeter with Mapping Optics) system of a scanning photon-counting lidar combined with a laser altimeter, we extend the 2003–09 surface elevation record of NASA's ICESat satellite, by determining cross-track slope and thus independently correcting for ICESat's cross-track pointing errors. In areas of high slope, cross-track errors result in measured elevation change that combines surface slope and the actual Δz/Δt signal. Slope corrections are particularly important in coastal ice streams, which often exhibit both rapidly changing elevations and high surface slopes. As a test case (assuming that surface slopes do not change significantly) we observe a lack of ice dynamic change at Cook Ice Shelf, while significant thinning occurred at Totten and Denman Glaciers during 2003–09. Article in Journal/Newspaper Antarc* Antarctic Antarctica Cook Ice Shelf East Antarctica Ice Sheet Ice Shelf Journal of Glaciology Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Cook Ice Shelf ENVELOPE(152.500,152.500,-68.667,-68.667) East Antarctica The Antarctic Journal of Glaciology 61 225 17 28 |