Temporal englacial water content variability associated with a rapidly retreating glacier
ABSTRACT This study uses a combination of evidence from ground penetrating radar, borehole, video, and wireless probe data to assess temporal changes in englacial water content associated with Briksdalsbreen, a rapidly retreating Norwegian glacier. Over a 13 day period in 2006, ice radar‐wave veloci...
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| Published in | Earth surface processes and landforms Vol. 36; no. 9; pp. 1230 - 1239 |
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| Main Authors | , , |
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| Language | English |
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Chichester, UK
John Wiley & Sons, Ltd
01.07.2011
Wiley |
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| Abstract | ABSTRACT
This study uses a combination of evidence from ground penetrating radar, borehole, video, and wireless probe data to assess temporal changes in englacial water content associated with Briksdalsbreen, a rapidly retreating Norwegian glacier. Over a 13 day period in 2006, ice radar‐wave velocity varied between 0·135 m/ns (± 0·009) and 0·159 m/ns (± 0·003), and water content from 7·8% (+2·6, −2·8) to 2·5% (+0·9, −1·1) [derived from the Looyenga (Physica 31(3): 401–406, 1965) formula]. It is suggested that during warm precipitation free days, void spaces within the glacier become filled with water, resulting in low radar‐wave velocity. This stored water then drained during cold, high precipitation days, allowing the radar‐wave velocity to rise. These changes in englacial storage were caused by the enhanced crevassing generated by the newly floating ice margin, and were associated with accelerated glacier retreat. Copyright © 2011 John Wiley & Sons, Ltd. |
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| AbstractList | ABSTRACT
This study uses a combination of evidence from ground penetrating radar, borehole, video, and wireless probe data to assess temporal changes in englacial water content associated with Briksdalsbreen, a rapidly retreating Norwegian glacier. Over a 13 day period in 2006, ice radar‐wave velocity varied between 0·135 m/ns (± 0·009) and 0·159 m/ns (± 0·003), and water content from 7·8% (+2·6, −2·8) to 2·5% (+0·9, −1·1) [derived from the Looyenga (Physica 31(3): 401–406, 1965) formula]. It is suggested that during warm precipitation free days, void spaces within the glacier become filled with water, resulting in low radar‐wave velocity. This stored water then drained during cold, high precipitation days, allowing the radar‐wave velocity to rise. These changes in englacial storage were caused by the enhanced crevassing generated by the newly floating ice margin, and were associated with accelerated glacier retreat. Copyright © 2011 John Wiley & Sons, Ltd. Keywords: englacial hydrology; GPR; glacier water storage; Briksdalsbreen; western Norway ABSTRACT This study uses a combination of evidence from ground penetrating radar, borehole, video, and wireless probe data to assess temporal changes in englacial water content associated with Briksdalsbreen, a rapidly retreating Norwegian glacier. Over a 13day period in 2006, ice radar-wave velocity varied between 0?135m/ns (?0?009) and 0?159m/ns (?0?003), and water content from 7?8% (+2?6, -2?8) to 2?5% (+0?9, -1?1) [derived from the Looyenga (Physica31(3): 401-406, 1965) formula]. It is suggested that during warm precipitation free days, void spaces within the glacier become filled with water, resulting in low radar-wave velocity. This stored water then drained during cold, high precipitation days, allowing the radar-wave velocity to rise. These changes in englacial storage were caused by the enhanced crevassing generated by the newly floating ice margin, and were associated with accelerated glacier retreat. |
| Author | Rose, Kathryn C. Martinez, Kirk Hart, Jane K. |
| Author_xml | – sequence: 1 givenname: Jane K. surname: Hart fullname: Hart, Jane K. organization: Schools of Geography, University of Southampton, Southampton, UK – sequence: 2 givenname: Kathryn C. surname: Rose fullname: Rose, Kathryn C. email: kase@soton.ac.uk, kase@soton.ac.uk organization: Schools of Geography, University of Southampton, Southampton, UK – sequence: 3 givenname: Kirk surname: Martinez fullname: Martinez, Kirk organization: Electronics and Computer Science, University of Southampton, Southampton, UK |
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| Keywords | Hydrology Glacier Ground-penetrating radar Meltwater Geophysics Glacier retreat |
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This study uses a combination of evidence from ground penetrating radar, borehole, video, and wireless probe data to assess temporal changes in... Keywords: englacial hydrology; GPR; glacier water storage; Briksdalsbreen; western Norway ABSTRACT This study uses a combination of evidence from ground... |
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| SubjectTerms | Bgi / Prodig Briksdalsbreen Cold storage Earth surface englacial hydrology glacier water storage Glaciers GPR Ground penetrating radar Hydrogeology. Groundwater hydrology Hydrometeorology Moisture content Physical geography Precipitation Temporal logic Voids western Norway |
| Title | Temporal englacial water content variability associated with a rapidly retreating glacier |
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