Topography, ice thickness and ice volume of the glacier Pedersenbreen in Svalbard, using GPR and GPS
Pedersenbreen is a small valley glacier (ca. 6 km2 in 2009), ending on land, located in north-western Spitsbergen, Svalbard. Ground-based radio-echo sounding in April 2009, using a 100-MHz commercial radar and a self-made low-frequency radar, revealed a polythermal structure. The radar was coupled w...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Norwegian Polar Institute
2014-02-01
|
| Series: | Polar Research |
| Subjects: | |
| Online Access: | http://www.polarresearch.net/index.php/polar/article/download/18533/pdf_1 |
| _version_ | 1818581290547412992 |
|---|---|
| author | Songtao Ai Zemin Wang Dongchen E Kim Holmén Zhi Tan Chunxia Zhou Weijun Sun |
| author_facet | Songtao Ai Zemin Wang Dongchen E Kim Holmén Zhi Tan Chunxia Zhou Weijun Sun |
| author_sort | Songtao Ai |
| collection | DOAJ |
| description | Pedersenbreen is a small valley glacier (ca. 6 km2 in 2009), ending on land, located in north-western Spitsbergen, Svalbard. Ground-based radio-echo sounding in April 2009, using a 100-MHz commercial radar and a self-made low-frequency radar, revealed a polythermal structure. The radar was coupled with a global positioning system device to geo-reference the traces. Each radar profile was manually edited to pick the reflection arrival time from the interface between ice and bedrock. Travel times were converted to ice thickness using a velocity of 0.165 m/ns, which was estimated from common mid-point measurement. Then the surface topography, bedrock topography, ice thickness contours and ice volume were derived using interpolation methods. Because it was difficult to distinguish the reflection wave from the background with the 100-MHz radar in some of the thickest areas of Pedersenbreen, we used a 5-MHz radar of our own design to fill in this gap. The maximum thickness of Pedersenbreen reaches 183±9 m, and the ice volume is 0.393±0.047 km3 in 2009. Comparing these data with the surface topographical data available for 1936 indicates a mass loss of nearly 12% during the past 73 years. |
| first_indexed | 2024-12-16T07:31:09Z |
| format | Article |
| id | doaj.art-b78df672ae0341c4b9d26197dc044512 |
| institution | Directory Open Access Journal |
| issn | 0800-0395 1751-8369 |
| language | English |
| last_indexed | 2024-12-16T07:31:09Z |
| publishDate | 2014-02-01 |
| publisher | Norwegian Polar Institute |
| record_format | Article |
| series | Polar Research |
| spelling | doaj.art-b78df672ae0341c4b9d26197dc0445122022-12-21T22:39:20ZengNorwegian Polar InstitutePolar Research0800-03951751-83692014-02-013301810.3402/polar.v33.1853318533Topography, ice thickness and ice volume of the glacier Pedersenbreen in Svalbard, using GPR and GPSSongtao Ai0Zemin Wang1Dongchen E2Kim Holmén3Zhi Tan4Chunxia Zhou5Weijun Sun6 Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, People's Republic of China Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, People's Republic of China Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, People's Republic of China Norwegian Polar Institute, Fram Centre, NO-9296 Tromsø, Norway Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, People's Republic of China Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, People's Republic of China Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of ChinaPedersenbreen is a small valley glacier (ca. 6 km2 in 2009), ending on land, located in north-western Spitsbergen, Svalbard. Ground-based radio-echo sounding in April 2009, using a 100-MHz commercial radar and a self-made low-frequency radar, revealed a polythermal structure. The radar was coupled with a global positioning system device to geo-reference the traces. Each radar profile was manually edited to pick the reflection arrival time from the interface between ice and bedrock. Travel times were converted to ice thickness using a velocity of 0.165 m/ns, which was estimated from common mid-point measurement. Then the surface topography, bedrock topography, ice thickness contours and ice volume were derived using interpolation methods. Because it was difficult to distinguish the reflection wave from the background with the 100-MHz radar in some of the thickest areas of Pedersenbreen, we used a 5-MHz radar of our own design to fill in this gap. The maximum thickness of Pedersenbreen reaches 183±9 m, and the ice volume is 0.393±0.047 km3 in 2009. Comparing these data with the surface topographical data available for 1936 indicates a mass loss of nearly 12% during the past 73 years.http://www.polarresearch.net/index.php/polar/article/download/18533/pdf_1GPRGPSglacier topographyice volumeice thicknessPedersenbreen |
| spellingShingle | Songtao Ai Zemin Wang Dongchen E Kim Holmén Zhi Tan Chunxia Zhou Weijun Sun Topography, ice thickness and ice volume of the glacier Pedersenbreen in Svalbard, using GPR and GPS Polar Research GPR GPS glacier topography ice volume ice thickness Pedersenbreen |
| title | Topography, ice thickness and ice volume of the glacier Pedersenbreen in Svalbard, using GPR and GPS |
| title_full | Topography, ice thickness and ice volume of the glacier Pedersenbreen in Svalbard, using GPR and GPS |
| title_fullStr | Topography, ice thickness and ice volume of the glacier Pedersenbreen in Svalbard, using GPR and GPS |
| title_full_unstemmed | Topography, ice thickness and ice volume of the glacier Pedersenbreen in Svalbard, using GPR and GPS |
| title_short | Topography, ice thickness and ice volume of the glacier Pedersenbreen in Svalbard, using GPR and GPS |
| title_sort | topography ice thickness and ice volume of the glacier pedersenbreen in svalbard using gpr and gps |
| topic | GPR GPS glacier topography ice volume ice thickness Pedersenbreen |
| url | http://www.polarresearch.net/index.php/polar/article/download/18533/pdf_1 |
| work_keys_str_mv | AT songtaoai topographyicethicknessandicevolumeoftheglacierpedersenbreeninsvalbardusinggprandgps AT zeminwang topographyicethicknessandicevolumeoftheglacierpedersenbreeninsvalbardusinggprandgps AT dongchene topographyicethicknessandicevolumeoftheglacierpedersenbreeninsvalbardusinggprandgps AT kimholmen topographyicethicknessandicevolumeoftheglacierpedersenbreeninsvalbardusinggprandgps AT zhitan topographyicethicknessandicevolumeoftheglacierpedersenbreeninsvalbardusinggprandgps AT chunxiazhou topographyicethicknessandicevolumeoftheglacierpedersenbreeninsvalbardusinggprandgps AT weijunsun topographyicethicknessandicevolumeoftheglacierpedersenbreeninsvalbardusinggprandgps |