Antarctic Grounding Line Mapping From CryoSat‐2 Radar Altimetry
We present a new technique for mapping the grounding line of Antarctic ice shelves using a combination of CryoSat‐2 standard and swath elevation data. Our method is based on detecting the tidal signal in pseudo crossovers and is tested on the Siple Coast region of West Antarctica. The mapped groundi...
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| Veröffentlicht in: | Geophysical research letters 2017-12, Vol.44 (23), p.11,886-11,893 |
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| creator | Dawson, G. J. Bamber, J. L. |
| description | We present a new technique for mapping the grounding line of Antarctic ice shelves using a combination of CryoSat‐2 standard and swath elevation data. Our method is based on detecting the tidal signal in pseudo crossovers and is tested on the Siple Coast region of West Antarctica. The mapped grounding line is in good agreement with previous observations from differential SAR interferometry and from ICESat repeat tracks, with a standard deviation of 1.1 km and 1.0 km, respectively, between these methods and ours. There is, however, an average seaward bias of 0.6 km, which is due to the poorer precision of CryoSat‐2. We have improved coverage particularly near the Echelmeyer Ice Stream where we have shown that the grounding zone is approximately 25 km inland from previous estimates. This new method is computationally efficient and can be applied to the rest of Antarctica.
Key Points
A new method that allows us to map the limit of ice flexure using CryoSat‐2 data
The mapped grounding line is in good agreement with previous DInSAR and ICESat measurements
Provides additional coverage of the Antarctic grounding zone |
| doi_str_mv | 10.1002/2017GL075589 |
| format | Article |
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Key Points
A new method that allows us to map the limit of ice flexure using CryoSat‐2 data
The mapped grounding line is in good agreement with previous DInSAR and ICESat measurements
Provides additional coverage of the Antarctic grounding zone</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1002/2017GL075589</identifier><language>eng</language><publisher>Washington: John Wiley & Sons, Inc</publisher><subject>Altimetry ; Antarctic ice ; Antarctic ice shelves ; Coastal zone ; Crossovers ; CryoSat‐2 ; grounding lines ; Ice shelves ; Interferometry ; Land ice ; Mapping ; Methods ; Radar ; Radar altimetry ; SAR (radar) ; Synthetic aperture radar interferometry</subject><ispartof>Geophysical research letters, 2017-12, Vol.44 (23), p.11,886-11,893</ispartof><rights>2017. The Authors.</rights><rights>2018. American Geophysical Union. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3447-d1d21add5ab29b059e0fba474a633e7f6f2d8d0b3ad7e7c9d4755ac7b7061cbc3</citedby><cites>FETCH-LOGICAL-c3447-d1d21add5ab29b059e0fba474a633e7f6f2d8d0b3ad7e7c9d4755ac7b7061cbc3</cites><orcidid>0000-0002-2280-2819 ; 0000-0001-9873-2266</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2F2017GL075589$$EPDF$$P50$$Gwiley$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2F2017GL075589$$EHTML$$P50$$Gwiley$$Hfree_for_read</linktohtml><link.rule.ids>314,780,784,1416,1432,11513,27923,27924,45573,45574,46408,46467,46832,46891</link.rule.ids></links><search><creatorcontrib>Dawson, G. J.</creatorcontrib><creatorcontrib>Bamber, J. L.</creatorcontrib><title>Antarctic Grounding Line Mapping From CryoSat‐2 Radar Altimetry</title><title>Geophysical research letters</title><description>We present a new technique for mapping the grounding line of Antarctic ice shelves using a combination of CryoSat‐2 standard and swath elevation data. Our method is based on detecting the tidal signal in pseudo crossovers and is tested on the Siple Coast region of West Antarctica. The mapped grounding line is in good agreement with previous observations from differential SAR interferometry and from ICESat repeat tracks, with a standard deviation of 1.1 km and 1.0 km, respectively, between these methods and ours. There is, however, an average seaward bias of 0.6 km, which is due to the poorer precision of CryoSat‐2. We have improved coverage particularly near the Echelmeyer Ice Stream where we have shown that the grounding zone is approximately 25 km inland from previous estimates. This new method is computationally efficient and can be applied to the rest of Antarctica.
Key Points
A new method that allows us to map the limit of ice flexure using CryoSat‐2 data
The mapped grounding line is in good agreement with previous DInSAR and ICESat measurements
Provides additional coverage of the Antarctic grounding zone</description><subject>Altimetry</subject><subject>Antarctic ice</subject><subject>Antarctic ice shelves</subject><subject>Coastal zone</subject><subject>Crossovers</subject><subject>CryoSat‐2</subject><subject>grounding lines</subject><subject>Ice shelves</subject><subject>Interferometry</subject><subject>Land ice</subject><subject>Mapping</subject><subject>Methods</subject><subject>Radar</subject><subject>Radar altimetry</subject><subject>SAR (radar)</subject><subject>Synthetic aperture radar interferometry</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>24P</sourceid><sourceid>WIN</sourceid><recordid>eNp90M1Kw0AQB_BFFKzVmw8Q8Gp09iO72WMoNgoRoep5mexuJKVN4iZFcvMRfEafxJR68ORpZuDHDPMn5JLCDQVgtwyoygtQSZLqIzKjWog4BVDHZAagp54peUrO-n4NABw4nZEsawYMdqhtlId217i6eYuKuvHRI3bdfliGdhstwtg-4_D9-cWiFToMUbYZ6q0fwnhOTirc9P7it87J6_LuZXEfF0_5wyIrYsuFULGjjlF0LsGS6RIS7aEqUSiBknOvKlkxlzooOTrlldVOTG-gVaUCSW1p-ZxcHfZ2oX3f-X4w63YXmumkoTrlkidCw6SuD8qGtu-Dr0wX6i2G0VAw-5DM35Amzg78o9748V9r8lWRSKkV_wEoeWg6</recordid><startdate>20171216</startdate><enddate>20171216</enddate><creator>Dawson, G. J.</creator><creator>Bamber, J. L.</creator><general>John Wiley & Sons, Inc</general><scope>24P</scope><scope>WIN</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>8FD</scope><scope>F1W</scope><scope>FR3</scope><scope>H8D</scope><scope>H96</scope><scope>KL.</scope><scope>KR7</scope><scope>L.G</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-2280-2819</orcidid><orcidid>https://orcid.org/0000-0001-9873-2266</orcidid></search><sort><creationdate>20171216</creationdate><title>Antarctic Grounding Line Mapping From CryoSat‐2 Radar Altimetry</title><author>Dawson, G. J. ; Bamber, J. L.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3447-d1d21add5ab29b059e0fba474a633e7f6f2d8d0b3ad7e7c9d4755ac7b7061cbc3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Altimetry</topic><topic>Antarctic ice</topic><topic>Antarctic ice shelves</topic><topic>Coastal zone</topic><topic>Crossovers</topic><topic>CryoSat‐2</topic><topic>grounding lines</topic><topic>Ice shelves</topic><topic>Interferometry</topic><topic>Land ice</topic><topic>Mapping</topic><topic>Methods</topic><topic>Radar</topic><topic>Radar altimetry</topic><topic>SAR (radar)</topic><topic>Synthetic aperture radar interferometry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Dawson, G. J.</creatorcontrib><creatorcontrib>Bamber, J. L.</creatorcontrib><collection>Wiley-Blackwell Open Access Titles</collection><collection>Wiley Free Content</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Technology Research Database</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Dawson, G. J.</au><au>Bamber, J. L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Antarctic Grounding Line Mapping From CryoSat‐2 Radar Altimetry</atitle><jtitle>Geophysical research letters</jtitle><date>2017-12-16</date><risdate>2017</risdate><volume>44</volume><issue>23</issue><spage>11,886</spage><epage>11,893</epage><pages>11,886-11,893</pages><issn>0094-8276</issn><eissn>1944-8007</eissn><abstract>We present a new technique for mapping the grounding line of Antarctic ice shelves using a combination of CryoSat‐2 standard and swath elevation data. Our method is based on detecting the tidal signal in pseudo crossovers and is tested on the Siple Coast region of West Antarctica. The mapped grounding line is in good agreement with previous observations from differential SAR interferometry and from ICESat repeat tracks, with a standard deviation of 1.1 km and 1.0 km, respectively, between these methods and ours. There is, however, an average seaward bias of 0.6 km, which is due to the poorer precision of CryoSat‐2. We have improved coverage particularly near the Echelmeyer Ice Stream where we have shown that the grounding zone is approximately 25 km inland from previous estimates. This new method is computationally efficient and can be applied to the rest of Antarctica.
Key Points
A new method that allows us to map the limit of ice flexure using CryoSat‐2 data
The mapped grounding line is in good agreement with previous DInSAR and ICESat measurements
Provides additional coverage of the Antarctic grounding zone</abstract><cop>Washington</cop><pub>John Wiley & Sons, Inc</pub><doi>10.1002/2017GL075589</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0002-2280-2819</orcidid><orcidid>https://orcid.org/0000-0001-9873-2266</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Altimetry Antarctic ice Antarctic ice shelves Coastal zone Crossovers CryoSat‐2 grounding lines Ice shelves Interferometry Land ice Mapping Methods Radar Radar altimetry SAR (radar) Synthetic aperture radar interferometry |
| title | Antarctic Grounding Line Mapping From CryoSat‐2 Radar Altimetry |
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