Ice velocities of Nordenskiöldbreen glacier, Svalbard
Precise measurements of ice-flow velocities are necessary for a proper understanding of the dynamics of glaciers and their response to climate change. We use stand-alone single-frequency GPS receivers for this purpose. They are designed to operate unattended for 1-3 years, allowing uninterrupted mea...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.809087 2024-09-15T18:07:58+00:00 Ice velocities of Nordenskiöldbreen glacier, Svalbard den Ouden, M A G Reijmer, Carleen H Pohjola, Veijo A van de Wal, Roderik S W Oerlemans, Johannes Boot, Wim MEDIAN LATITUDE: 78.694340 * MEDIAN LONGITUDE: 17.202700 * SOUTH-BOUND LATITUDE: 78.632000 * WEST-BOUND LONGITUDE: 16.975000 * NORTH-BOUND LATITUDE: 78.758000 * EAST-BOUND LONGITUDE: 17.414000 * DATE/TIME START: 2006-03-29T00:00:00 * DATE/TIME END: 2009-05-29T00:00:00 2010 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.809087 https://doi.org/10.1594/PANGAEA.809087 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.809087 https://doi.org/10.1594/PANGAEA.809087 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: den Ouden, M A G; Reijmer, Carleen H; Pohjola, Veijo A; van de Wal, Roderik S W; Oerlemans, Johannes; Boot, Wim (2010): Stand-alone single-frequency GPS ice velocity observations on Nordenskiöldbreen, Svalbard. The Cryosphere, 4(4), 593-604, https://doi.org/10.5194/tc-4-593-2010 International Polar Year (2007-2008) IPY dataset publication series 2010 ftpangaea https://doi.org/10.1594/PANGAEA.80908710.5194/tc-4-593-2010 2024-07-24T02:31:21Z Precise measurements of ice-flow velocities are necessary for a proper understanding of the dynamics of glaciers and their response to climate change. We use stand-alone single-frequency GPS receivers for this purpose. They are designed to operate unattended for 1-3 years, allowing uninterrupted measurements for long periods with hourly temporal resolution. We present the system and illustrate its functioning using data from 9 GPS receivers deployed on Nordenskiöldbreen, Svalbard, for the period 2006-2009. The accuracy of the receivers is 1.62 m based on the standard deviation in the average location of a stationary reference station (NBRef). Both the location of NBRef and the observed flow velocities agree within one standard deviation with DGPS measurements. Periodicity (6, 8, 12, 24 h) in the NBRef data is largely explained by the atmospheric, mainly ionospheric, influence on the GPS signal. A (weighed) running-average on the observed locations significantly reduces the standard deviation and removes high frequency periodicities, but also reduces the temporal resolution. Results show annual average velocities varying between 40 and 55 m/yr at stations on the central flow-line. On weekly to monthly time-scales we observe a peak in the flow velocities (from 60 to 90 m/yr) at the beginning of July related to increased melt-rates. No significant lag is observed between the timing of the maximum speed between different stations. This is likely due to the limited temporal resolution after averaging in combination with the relatively small distance (max. ±13 km) between the stations. Other/Unknown Material glacier International Polar Year IPY Svalbard The Cryosphere PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(16.975000,17.414000,78.758000,78.632000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
International Polar Year (2007-2008) IPY |
spellingShingle |
International Polar Year (2007-2008) IPY den Ouden, M A G Reijmer, Carleen H Pohjola, Veijo A van de Wal, Roderik S W Oerlemans, Johannes Boot, Wim Ice velocities of Nordenskiöldbreen glacier, Svalbard |
topic_facet |
International Polar Year (2007-2008) IPY |
description |
Precise measurements of ice-flow velocities are necessary for a proper understanding of the dynamics of glaciers and their response to climate change. We use stand-alone single-frequency GPS receivers for this purpose. They are designed to operate unattended for 1-3 years, allowing uninterrupted measurements for long periods with hourly temporal resolution. We present the system and illustrate its functioning using data from 9 GPS receivers deployed on Nordenskiöldbreen, Svalbard, for the period 2006-2009. The accuracy of the receivers is 1.62 m based on the standard deviation in the average location of a stationary reference station (NBRef). Both the location of NBRef and the observed flow velocities agree within one standard deviation with DGPS measurements. Periodicity (6, 8, 12, 24 h) in the NBRef data is largely explained by the atmospheric, mainly ionospheric, influence on the GPS signal. A (weighed) running-average on the observed locations significantly reduces the standard deviation and removes high frequency periodicities, but also reduces the temporal resolution. Results show annual average velocities varying between 40 and 55 m/yr at stations on the central flow-line. On weekly to monthly time-scales we observe a peak in the flow velocities (from 60 to 90 m/yr) at the beginning of July related to increased melt-rates. No significant lag is observed between the timing of the maximum speed between different stations. This is likely due to the limited temporal resolution after averaging in combination with the relatively small distance (max. ±13 km) between the stations. |
format |
Other/Unknown Material |
author |
den Ouden, M A G Reijmer, Carleen H Pohjola, Veijo A van de Wal, Roderik S W Oerlemans, Johannes Boot, Wim |
author_facet |
den Ouden, M A G Reijmer, Carleen H Pohjola, Veijo A van de Wal, Roderik S W Oerlemans, Johannes Boot, Wim |
author_sort |
den Ouden, M A G |
title |
Ice velocities of Nordenskiöldbreen glacier, Svalbard |
title_short |
Ice velocities of Nordenskiöldbreen glacier, Svalbard |
title_full |
Ice velocities of Nordenskiöldbreen glacier, Svalbard |
title_fullStr |
Ice velocities of Nordenskiöldbreen glacier, Svalbard |
title_full_unstemmed |
Ice velocities of Nordenskiöldbreen glacier, Svalbard |
title_sort |
ice velocities of nordenskiöldbreen glacier, svalbard |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.809087 https://doi.org/10.1594/PANGAEA.809087 |
op_coverage |
MEDIAN LATITUDE: 78.694340 * MEDIAN LONGITUDE: 17.202700 * SOUTH-BOUND LATITUDE: 78.632000 * WEST-BOUND LONGITUDE: 16.975000 * NORTH-BOUND LATITUDE: 78.758000 * EAST-BOUND LONGITUDE: 17.414000 * DATE/TIME START: 2006-03-29T00:00:00 * DATE/TIME END: 2009-05-29T00:00:00 |
long_lat |
ENVELOPE(16.975000,17.414000,78.758000,78.632000) |
genre |
glacier International Polar Year IPY Svalbard The Cryosphere |
genre_facet |
glacier International Polar Year IPY Svalbard The Cryosphere |
op_source |
Supplement to: den Ouden, M A G; Reijmer, Carleen H; Pohjola, Veijo A; van de Wal, Roderik S W; Oerlemans, Johannes; Boot, Wim (2010): Stand-alone single-frequency GPS ice velocity observations on Nordenskiöldbreen, Svalbard. The Cryosphere, 4(4), 593-604, https://doi.org/10.5194/tc-4-593-2010 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.809087 https://doi.org/10.1594/PANGAEA.809087 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.80908710.5194/tc-4-593-2010 |
_version_ |
1810445326219214848 |