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Land-ice elevation changes from photon-counting swath altimetry: first applications over the Antarctic ice sheet
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| Zeitschriftentitel: | Journal of Glaciology |
|---|---|
| Personen und Körperschaften: | , , , , , , , , , , |
| In: | Journal of Glaciology, 61, 2015, 225, S. 17-28 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
International Glaciological Society
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| Schlagwörter: |
| author_facet |
Young, Duncan A. Lindzey, Laura E. Blankenship, Donald D. Greenbaum, Jamin S. Garcia De Gorordo, Alvaro Kempf, Scott D. Roberts, Jason L. Warner, Roland C. Ommen, Tas Van Siegert, Martin J. Meur, Emmanuel Le Young, Duncan A. Lindzey, Laura E. Blankenship, Donald D. Greenbaum, Jamin S. Garcia De Gorordo, Alvaro Kempf, Scott D. Roberts, Jason L. Warner, Roland C. Ommen, Tas Van Siegert, Martin J. Meur, Emmanuel Le |
|---|---|
| author |
Young, Duncan A. Lindzey, Laura E. Blankenship, Donald D. Greenbaum, Jamin S. Garcia De Gorordo, Alvaro Kempf, Scott D. Roberts, Jason L. Warner, Roland C. Ommen, Tas Van Siegert, Martin J. Meur, Emmanuel Le |
| spellingShingle |
Young, Duncan A. Lindzey, Laura E. Blankenship, Donald D. Greenbaum, Jamin S. Garcia De Gorordo, Alvaro Kempf, Scott D. Roberts, Jason L. Warner, Roland C. Ommen, Tas Van Siegert, Martin J. Meur, Emmanuel Le Journal of Glaciology Land-ice elevation changes from photon-counting swath altimetry: first applications over the Antarctic ice sheet Earth-Surface Processes |
| author_sort |
young, duncan a. |
| spelling |
Young, Duncan A. Lindzey, Laura E. Blankenship, Donald D. Greenbaum, Jamin S. Garcia De Gorordo, Alvaro Kempf, Scott D. Roberts, Jason L. Warner, Roland C. Ommen, Tas Van Siegert, Martin J. Meur, Emmanuel Le 0022-1430 1727-5652 International Glaciological Society Earth-Surface Processes http://dx.doi.org/10.3189/2015jog14j048 <jats:title>Abstract</jats:title><jats:p>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 Δ<jats:italic>z/</jats:italic>Δ<jats:italic>t</jats:italic> 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.</jats:p> Land-ice elevation changes from photon-counting swath altimetry: first applications over the Antarctic ice sheet Journal of Glaciology |
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| title |
Land-ice elevation changes from photon-counting swath altimetry: first applications over the Antarctic ice sheet |
| title_unstemmed |
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_short |
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 |
| topic |
Earth-Surface Processes |
| url |
http://dx.doi.org/10.3189/2015jog14j048 |
| publishDate |
2015 |
| physical |
17-28 |
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<jats:title>Abstract</jats:title><jats:p>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 Δ<jats:italic>z/</jats:italic>Δ<jats:italic>t</jats:italic> 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.</jats:p> |
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| author | Young, Duncan A., Lindzey, Laura E., Blankenship, Donald D., Greenbaum, Jamin S., Garcia De Gorordo, Alvaro, Kempf, Scott D., Roberts, Jason L., Warner, Roland C., Ommen, Tas Van, Siegert, Martin J., Meur, Emmanuel Le |
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| description | <jats:title>Abstract</jats:title><jats:p>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 Δ<jats:italic>z/</jats:italic>Δ<jats:italic>t</jats:italic> 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.</jats:p> |
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| spelling | Young, Duncan A. Lindzey, Laura E. Blankenship, Donald D. Greenbaum, Jamin S. Garcia De Gorordo, Alvaro Kempf, Scott D. Roberts, Jason L. Warner, Roland C. Ommen, Tas Van Siegert, Martin J. Meur, Emmanuel Le 0022-1430 1727-5652 International Glaciological Society Earth-Surface Processes http://dx.doi.org/10.3189/2015jog14j048 <jats:title>Abstract</jats:title><jats:p>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 Δ<jats:italic>z/</jats:italic>Δ<jats:italic>t</jats:italic> 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.</jats:p> Land-ice elevation changes from photon-counting swath altimetry: first applications over the Antarctic ice sheet Journal of Glaciology |
| spellingShingle | Young, Duncan A., Lindzey, Laura E., Blankenship, Donald D., Greenbaum, Jamin S., Garcia De Gorordo, Alvaro, Kempf, Scott D., Roberts, Jason L., Warner, Roland C., Ommen, Tas Van, Siegert, Martin J., Meur, Emmanuel Le, Journal of Glaciology, Land-ice elevation changes from photon-counting swath altimetry: first applications over the Antarctic ice sheet, Earth-Surface Processes |
| title | 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_short | 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 |
| title_unstemmed | Land-ice elevation changes from photon-counting swath altimetry: first applications over the Antarctic ice sheet |
| topic | Earth-Surface Processes |
| url | http://dx.doi.org/10.3189/2015jog14j048 |