Diurnal fluctuations of glacier surface velocity observed with terrestrial radar interferometry at Laohugou No. 12 Glacier, western Qilian mountains, China
ABSTRACT Measurements of short-interval variations in glacier surface velocity, which contribute to our understanding of ice motion mechanisms, remain scarce on the Tibetan Plateau. Here we present sub-hourly measurements of glacier surface motion variations at the terminus region of Laohugou No. 12...
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crcambridgeupr:10.1017/jog.2019.1 2024-06-23T07:54:14+00:00 Diurnal fluctuations of glacier surface velocity observed with terrestrial radar interferometry at Laohugou No. 12 Glacier, western Qilian mountains, China LIU, LIN JIANG, LIMING SUN, YONGLING WANG, HANSHENG SUN, YAFEI XU, HOUZE 2019 http://dx.doi.org/10.1017/jog.2019.1 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143019000017 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by-nc-sa/4.0/ Journal of Glaciology volume 65, issue 250, page 239-248 ISSN 0022-1430 1727-5652 journal-article 2019 crcambridgeupr https://doi.org/10.1017/jog.2019.1 2024-06-12T04:04:49Z ABSTRACT Measurements of short-interval variations in glacier surface velocity, which contribute to our understanding of ice motion mechanisms, remain scarce on the Tibetan Plateau. Here we present sub-hourly measurements of glacier surface motion variations at the terminus region of Laohugou No. 12 Glacier. Field observations were collected over 4 d in July 2015 from terrestrial radar interferometry. The observed glacier displacement time series are generally in agreement with the results measured by differential GPS and highlight that glacier surface velocity is characterized by clear diurnal fluctuations in the study period. During day-time hours, glacier flow speeds were higher than 3.0 mm h −1 , whereas they were below 1.0 mm h −1 during night-time hours. The large diurnal fluctuations of glacier surface velocity indicate that variations in basal slip are the dominant motion mechanism. Moreover, a positive correlation ( R = 0.82, P < 0.001) between air temperature and glacier surface velocity suggests that glacier motion variations are probably affected by changes in air temperature during the ablation season. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 65 250 239 248 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
ABSTRACT Measurements of short-interval variations in glacier surface velocity, which contribute to our understanding of ice motion mechanisms, remain scarce on the Tibetan Plateau. Here we present sub-hourly measurements of glacier surface motion variations at the terminus region of Laohugou No. 12 Glacier. Field observations were collected over 4 d in July 2015 from terrestrial radar interferometry. The observed glacier displacement time series are generally in agreement with the results measured by differential GPS and highlight that glacier surface velocity is characterized by clear diurnal fluctuations in the study period. During day-time hours, glacier flow speeds were higher than 3.0 mm h −1 , whereas they were below 1.0 mm h −1 during night-time hours. The large diurnal fluctuations of glacier surface velocity indicate that variations in basal slip are the dominant motion mechanism. Moreover, a positive correlation ( R = 0.82, P < 0.001) between air temperature and glacier surface velocity suggests that glacier motion variations are probably affected by changes in air temperature during the ablation season. |
format |
Article in Journal/Newspaper |
author |
LIU, LIN JIANG, LIMING SUN, YONGLING WANG, HANSHENG SUN, YAFEI XU, HOUZE |
spellingShingle |
LIU, LIN JIANG, LIMING SUN, YONGLING WANG, HANSHENG SUN, YAFEI XU, HOUZE Diurnal fluctuations of glacier surface velocity observed with terrestrial radar interferometry at Laohugou No. 12 Glacier, western Qilian mountains, China |
author_facet |
LIU, LIN JIANG, LIMING SUN, YONGLING WANG, HANSHENG SUN, YAFEI XU, HOUZE |
author_sort |
LIU, LIN |
title |
Diurnal fluctuations of glacier surface velocity observed with terrestrial radar interferometry at Laohugou No. 12 Glacier, western Qilian mountains, China |
title_short |
Diurnal fluctuations of glacier surface velocity observed with terrestrial radar interferometry at Laohugou No. 12 Glacier, western Qilian mountains, China |
title_full |
Diurnal fluctuations of glacier surface velocity observed with terrestrial radar interferometry at Laohugou No. 12 Glacier, western Qilian mountains, China |
title_fullStr |
Diurnal fluctuations of glacier surface velocity observed with terrestrial radar interferometry at Laohugou No. 12 Glacier, western Qilian mountains, China |
title_full_unstemmed |
Diurnal fluctuations of glacier surface velocity observed with terrestrial radar interferometry at Laohugou No. 12 Glacier, western Qilian mountains, China |
title_sort |
diurnal fluctuations of glacier surface velocity observed with terrestrial radar interferometry at laohugou no. 12 glacier, western qilian mountains, china |
publisher |
Cambridge University Press (CUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1017/jog.2019.1 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143019000017 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 65, issue 250, page 239-248 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by-nc-sa/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2019.1 |
container_title |
Journal of Glaciology |
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65 |
container_issue |
250 |
container_start_page |
239 |
op_container_end_page |
248 |
_version_ |
1802646321520181248 |