Identification of snow ablation rate, ELA, AAR and net mass balance using transient snowline variations on two arctic glaciers
Identification of the transient snowline (TSL) from high spatial resolution Landsat imagery on Lemon Creek Glacier (LCG), southeast Alaska, USA, and Mittivakkat Gletscher (MG), southeast Greenland, is used to determine snow ablation rates, the equilibrium-line altitude (ELA) and the accumulation-are...
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Cambridge University Press (CUP) for International Glaciological Society
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Online Access: | https://eprints.lincoln.ac.uk/id/eprint/26016/ https://doi.org/10.3189/2013JoG12J221 |
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ftulincoln:oai:eprints.lincoln.ac.uk:26016 2023-05-15T14:25:43+02:00 Identification of snow ablation rate, ELA, AAR and net mass balance using transient snowline variations on two arctic glaciers Mernild, S. H. Pelto, M. Malmros, J. K. Yde, J. C. Knudsen, N. T. Hanna, E. 2013-08-01 https://eprints.lincoln.ac.uk/id/eprint/26016/ https://doi.org/10.3189/2013JoG12J221 unknown Cambridge University Press (CUP) for International Glaciological Society Mernild, S. H., Pelto, M., Malmros, J. K., Yde, J. C., Knudsen, N. T. and Hanna, E. (2013) Identification of snow ablation rate, ELA, AAR and net mass balance using transient snowline variations on two arctic glaciers. Journal of Glaciology, 59 (216). pp. 649-659. ISSN 0022-1430 doi:10.3189/2013JoG12J221 F330 Environmental Physics Article PeerReviewed 2013 ftulincoln https://doi.org/10.3189/2013JoG12J221 2022-03-02T20:07:06Z Identification of the transient snowline (TSL) from high spatial resolution Landsat imagery on Lemon Creek Glacier (LCG), southeast Alaska, USA, and Mittivakkat Gletscher (MG), southeast Greenland, is used to determine snow ablation rates, the equilibrium-line altitude (ELA) and the accumulation-area ratio (AAR). The rate of rise of the TSL during the ablation season on a glacier where the balance gradient is known provides a measure of the snow ablation rate. On both LCG and MG, snow pits were completed in regions that the TSL subsequently transects. This further provides a direct measure of the snow ablation rates for a particular year. TSL observations from multiple dates during the ablation season from 1998 to 2011 at LCG and 1999 to 2012 at MG were used to explore the consistency of the TSL rise and snow ablation rate. On LCG and MG the satellite-derived mean TSL migration rates were 3.8 ±0.6 and 9.4±9.1md-1, respectively. The snow ablation rates were 0.028 ± 0.004 m w.e. d-1 for LCG and 0.051 ±0.018 m w.e. d-1 for MG estimated by applying a TSL-mass-balance-gradient method, and 0.031 ± 0.004 and 0.047 ± 0.019 m w.e. d-1 by applying a snow-pitsatellite method, illustrating significant agreement between the two different approaches for both field sites. Also, satellite-derived ELA and AAR, and estimated net mass-balance (Ba) conditions were in agreement with observed ELA, AAR and Ba conditions for LCG and MG. Article in Journal/Newspaper Arctic Arctic glacier glacier glaciers Greenland Journal of Glaciology Alaska University of Lincoln: Lincoln Repository Arctic Greenland Ela ENVELOPE(9.642,9.642,63.170,63.170) Lemon Creek ENVELOPE(177.452,177.452,51.987,51.987) Journal of Glaciology 59 216 649 659 |
institution |
Open Polar |
collection |
University of Lincoln: Lincoln Repository |
op_collection_id |
ftulincoln |
language |
unknown |
topic |
F330 Environmental Physics |
spellingShingle |
F330 Environmental Physics Mernild, S. H. Pelto, M. Malmros, J. K. Yde, J. C. Knudsen, N. T. Hanna, E. Identification of snow ablation rate, ELA, AAR and net mass balance using transient snowline variations on two arctic glaciers |
topic_facet |
F330 Environmental Physics |
description |
Identification of the transient snowline (TSL) from high spatial resolution Landsat imagery on Lemon Creek Glacier (LCG), southeast Alaska, USA, and Mittivakkat Gletscher (MG), southeast Greenland, is used to determine snow ablation rates, the equilibrium-line altitude (ELA) and the accumulation-area ratio (AAR). The rate of rise of the TSL during the ablation season on a glacier where the balance gradient is known provides a measure of the snow ablation rate. On both LCG and MG, snow pits were completed in regions that the TSL subsequently transects. This further provides a direct measure of the snow ablation rates for a particular year. TSL observations from multiple dates during the ablation season from 1998 to 2011 at LCG and 1999 to 2012 at MG were used to explore the consistency of the TSL rise and snow ablation rate. On LCG and MG the satellite-derived mean TSL migration rates were 3.8 ±0.6 and 9.4±9.1md-1, respectively. The snow ablation rates were 0.028 ± 0.004 m w.e. d-1 for LCG and 0.051 ±0.018 m w.e. d-1 for MG estimated by applying a TSL-mass-balance-gradient method, and 0.031 ± 0.004 and 0.047 ± 0.019 m w.e. d-1 by applying a snow-pitsatellite method, illustrating significant agreement between the two different approaches for both field sites. Also, satellite-derived ELA and AAR, and estimated net mass-balance (Ba) conditions were in agreement with observed ELA, AAR and Ba conditions for LCG and MG. |
format |
Article in Journal/Newspaper |
author |
Mernild, S. H. Pelto, M. Malmros, J. K. Yde, J. C. Knudsen, N. T. Hanna, E. |
author_facet |
Mernild, S. H. Pelto, M. Malmros, J. K. Yde, J. C. Knudsen, N. T. Hanna, E. |
author_sort |
Mernild, S. H. |
title |
Identification of snow ablation rate, ELA, AAR and net mass balance using transient snowline variations on two arctic glaciers |
title_short |
Identification of snow ablation rate, ELA, AAR and net mass balance using transient snowline variations on two arctic glaciers |
title_full |
Identification of snow ablation rate, ELA, AAR and net mass balance using transient snowline variations on two arctic glaciers |
title_fullStr |
Identification of snow ablation rate, ELA, AAR and net mass balance using transient snowline variations on two arctic glaciers |
title_full_unstemmed |
Identification of snow ablation rate, ELA, AAR and net mass balance using transient snowline variations on two arctic glaciers |
title_sort |
identification of snow ablation rate, ela, aar and net mass balance using transient snowline variations on two arctic glaciers |
publisher |
Cambridge University Press (CUP) for International Glaciological Society |
publishDate |
2013 |
url |
https://eprints.lincoln.ac.uk/id/eprint/26016/ https://doi.org/10.3189/2013JoG12J221 |
long_lat |
ENVELOPE(9.642,9.642,63.170,63.170) ENVELOPE(177.452,177.452,51.987,51.987) |
geographic |
Arctic Greenland Ela Lemon Creek |
geographic_facet |
Arctic Greenland Ela Lemon Creek |
genre |
Arctic Arctic glacier glacier glaciers Greenland Journal of Glaciology Alaska |
genre_facet |
Arctic Arctic glacier glacier glaciers Greenland Journal of Glaciology Alaska |
op_relation |
Mernild, S. H., Pelto, M., Malmros, J. K., Yde, J. C., Knudsen, N. T. and Hanna, E. (2013) Identification of snow ablation rate, ELA, AAR and net mass balance using transient snowline variations on two arctic glaciers. Journal of Glaciology, 59 (216). pp. 649-659. ISSN 0022-1430 doi:10.3189/2013JoG12J221 |
op_doi |
https://doi.org/10.3189/2013JoG12J221 |
container_title |
Journal of Glaciology |
container_volume |
59 |
container_issue |
216 |
container_start_page |
649 |
op_container_end_page |
659 |
_version_ |
1766298162882936832 |