Sea Ice Freeboard in the Ross Sea from Airborne Altimetry IcePod 2016–2017 and a Comparison with IceBridge 2013 and ICESat 2003–2008
As part of the Polynyas and Ice Production in the Ross Sea (PIPERS) project, the IcePod system onboard the LC-130 aircraft based at McMurdo Station was flown over the Ross Sea, Antarctica in November 2016 and 2017, with the purpose of repeating the same lines that NASA’s Operation IceBridge (OIB) ai...
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doaj-00983c87de95424a889aaf75af9417302020-11-25T03:32:34ZengMDPI AGRemote Sensing2072-42922020-07-01122226222610.3390/rs12142226Sea Ice Freeboard in the Ross Sea from Airborne Altimetry IcePod 2016–2017 and a Comparison with IceBridge 2013 and ICESat 2003–2008Liuxi Tian0Hongjie Xie1Stephen F. Ackley2Kirsty J. Tinto3Robin E. Bell4Christopher J. Zappa5Yongli Gao6Alberto M. Mestas-Nuñez7Department of Geological Sciences, University of Texas at San Antonio, San Antonio, TX 78249, USADepartment of Geological Sciences, University of Texas at San Antonio, San Antonio, TX 78249, USADepartment of Geological Sciences, University of Texas at San Antonio, San Antonio, TX 78249, USALamont-Doherty Earth Observatory, Columbia University, New York, NY 10964, USALamont-Doherty Earth Observatory, Columbia University, New York, NY 10964, USALamont-Doherty Earth Observatory, Columbia University, New York, NY 10964, USADepartment of Geological Sciences, University of Texas at San Antonio, San Antonio, TX 78249, USADepartment of Geological Sciences, University of Texas at San Antonio, San Antonio, TX 78249, USAAs part of the Polynyas and Ice Production in the Ross Sea (PIPERS) project, the IcePod system onboard the LC-130 aircraft based at McMurdo Station was flown over the Ross Sea, Antarctica in November 2016 and 2017, with the purpose of repeating the same lines that NASA’s Operation IceBridge (OIB) aircraft flew over in 2013. We resampled the lidar data into 70 m pixels (similar to the footprint size of OIB L2 and ICESat data) and took the mean of the lowest 2% elevation values of 25 km (50 km) length along a flight track as the local sea level of the central 25 km (50 km). Most of the IcePod data were over the same flight lines taken by OIB in 2013, so the total freeboard changes from 2013 to 2016 and 2017 were examined. Combining with the ICESat (2003–2008), we obtained a better picture of total freeboard and its interannual variability in the Ross Sea. The pattern of the sea ice distribution supports that new ice produced in coastal polynyas was transported northward by katabatic winds off the ice shelf. Compared to ICESat years, sea ice near the coast was thicker, while sea ice offshore was thinner in the more recent OIB/IcePod years. The results also showed that, in general, sea ice was thicker in 2017 compared to 2013 or 2016—0.02–0.55 m thicker in total freeboard.https://www.mdpi.com/2072-4292/12/14/2226Antarcticpolynyaice productionlocal sea levellaser altimetry |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Liuxi Tian Hongjie Xie Stephen F. Ackley Kirsty J. Tinto Robin E. Bell Christopher J. Zappa Yongli Gao Alberto M. Mestas-Nuñez |
spellingShingle |
Liuxi Tian Hongjie Xie Stephen F. Ackley Kirsty J. Tinto Robin E. Bell Christopher J. Zappa Yongli Gao Alberto M. Mestas-Nuñez Sea Ice Freeboard in the Ross Sea from Airborne Altimetry IcePod 2016–2017 and a Comparison with IceBridge 2013 and ICESat 2003–2008 Remote Sensing Antarctic polynya ice production local sea level laser altimetry |
author_facet |
Liuxi Tian Hongjie Xie Stephen F. Ackley Kirsty J. Tinto Robin E. Bell Christopher J. Zappa Yongli Gao Alberto M. Mestas-Nuñez |
author_sort |
Liuxi Tian |
title |
Sea Ice Freeboard in the Ross Sea from Airborne Altimetry IcePod 2016–2017 and a Comparison with IceBridge 2013 and ICESat 2003–2008 |
title_short |
Sea Ice Freeboard in the Ross Sea from Airborne Altimetry IcePod 2016–2017 and a Comparison with IceBridge 2013 and ICESat 2003–2008 |
title_full |
Sea Ice Freeboard in the Ross Sea from Airborne Altimetry IcePod 2016–2017 and a Comparison with IceBridge 2013 and ICESat 2003–2008 |
title_fullStr |
Sea Ice Freeboard in the Ross Sea from Airborne Altimetry IcePod 2016–2017 and a Comparison with IceBridge 2013 and ICESat 2003–2008 |
title_full_unstemmed |
Sea Ice Freeboard in the Ross Sea from Airborne Altimetry IcePod 2016–2017 and a Comparison with IceBridge 2013 and ICESat 2003–2008 |
title_sort |
sea ice freeboard in the ross sea from airborne altimetry icepod 2016–2017 and a comparison with icebridge 2013 and icesat 2003–2008 |
publisher |
MDPI AG |
series |
Remote Sensing |
issn |
2072-4292 |
publishDate |
2020-07-01 |
description |
As part of the Polynyas and Ice Production in the Ross Sea (PIPERS) project, the IcePod system onboard the LC-130 aircraft based at McMurdo Station was flown over the Ross Sea, Antarctica in November 2016 and 2017, with the purpose of repeating the same lines that NASA’s Operation IceBridge (OIB) aircraft flew over in 2013. We resampled the lidar data into 70 m pixels (similar to the footprint size of OIB L2 and ICESat data) and took the mean of the lowest 2% elevation values of 25 km (50 km) length along a flight track as the local sea level of the central 25 km (50 km). Most of the IcePod data were over the same flight lines taken by OIB in 2013, so the total freeboard changes from 2013 to 2016 and 2017 were examined. Combining with the ICESat (2003–2008), we obtained a better picture of total freeboard and its interannual variability in the Ross Sea. The pattern of the sea ice distribution supports that new ice produced in coastal polynyas was transported northward by katabatic winds off the ice shelf. Compared to ICESat years, sea ice near the coast was thicker, while sea ice offshore was thinner in the more recent OIB/IcePod years. The results also showed that, in general, sea ice was thicker in 2017 compared to 2013 or 2016—0.02–0.55 m thicker in total freeboard. |
topic |
Antarctic polynya ice production local sea level laser altimetry |
url |
https://www.mdpi.com/2072-4292/12/14/2226 |
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