Karakoram geodetic glacier mass balances between 2008 and 2016: persistence of the anomaly and influence of a large rock avalanche on Siachen Glacier
Karakoram glaciers experienced balanced or slightly positive mass budgets since at least the 1970s. Here, we provide an update on the state of balance of Central and Eastern Karakoram glaciers (12 000 km2) between 2008 and 2016 by differencing DEMs derived from satellite optical images. The mass bud...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press
2019
|
Subjects: | |
Online Access: | https://doi.org/10.1017/jog.2019.32 https://doaj.org/article/015f086c36ff4c2d8b922cc5f38c3036 |
id |
ftdoajarticles:oai:doaj.org/article:015f086c36ff4c2d8b922cc5f38c3036 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:015f086c36ff4c2d8b922cc5f38c3036 2023-05-15T16:57:33+02:00 Karakoram geodetic glacier mass balances between 2008 and 2016: persistence of the anomaly and influence of a large rock avalanche on Siachen Glacier ETIENNE BERTHIER FANNY BRUN 2019-06-01T00:00:00Z https://doi.org/10.1017/jog.2019.32 https://doaj.org/article/015f086c36ff4c2d8b922cc5f38c3036 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143019000327/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2019.32 0022-1430 1727-5652 https://doaj.org/article/015f086c36ff4c2d8b922cc5f38c3036 Journal of Glaciology, Vol 65, Pp 494-507 (2019) glacier mass balance glacier surges mountain glaciers remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2019 ftdoajarticles https://doi.org/10.1017/jog.2019.32 2023-03-12T01:30:57Z Karakoram glaciers experienced balanced or slightly positive mass budgets since at least the 1970s. Here, we provide an update on the state of balance of Central and Eastern Karakoram glaciers (12 000 km2) between 2008 and 2016 by differencing DEMs derived from satellite optical images. The mass budget of Central Karakoram glaciers was slightly positive (0.12 ± 0.14 m w.e. a−1) while eastern Karakoram glaciers lost mass (−0.24 ± 0.12 m w.e. a−1). The glacier-wide mass balances of surge-type and nonsurge-type glaciers were not statistically different. Our elevation change data also depict the effect of a > 100 Mm3 rock avalanche on Siachen Glacier ablation area in September 2010. It covered a 4 km2 area with a thick debris layer that unexpectedly, led to locally enhanced glacier mass loss during the following years. Enhanced melt opened a > 100 m deep 2 km2 depression and contributed to 6% of the mass loss of Siachen Glacier from 2010 to 2016 (−0.39 m w.e. a−1). We hypothesize that sub- or englacial melt may be responsible for this intriguing behaviour. This study contributes to a better knowledge of the regional pattern of the Karakoram anomaly and of the influence of rock avalanches on glacier mass changes. Article in Journal/Newspaper Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Geodetic Glacier ENVELOPE(163.800,163.800,-77.750,-77.750) Journal of Glaciology 65 251 494 507 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
glacier mass balance glacier surges mountain glaciers remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
glacier mass balance glacier surges mountain glaciers remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 ETIENNE BERTHIER FANNY BRUN Karakoram geodetic glacier mass balances between 2008 and 2016: persistence of the anomaly and influence of a large rock avalanche on Siachen Glacier |
topic_facet |
glacier mass balance glacier surges mountain glaciers remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Karakoram glaciers experienced balanced or slightly positive mass budgets since at least the 1970s. Here, we provide an update on the state of balance of Central and Eastern Karakoram glaciers (12 000 km2) between 2008 and 2016 by differencing DEMs derived from satellite optical images. The mass budget of Central Karakoram glaciers was slightly positive (0.12 ± 0.14 m w.e. a−1) while eastern Karakoram glaciers lost mass (−0.24 ± 0.12 m w.e. a−1). The glacier-wide mass balances of surge-type and nonsurge-type glaciers were not statistically different. Our elevation change data also depict the effect of a > 100 Mm3 rock avalanche on Siachen Glacier ablation area in September 2010. It covered a 4 km2 area with a thick debris layer that unexpectedly, led to locally enhanced glacier mass loss during the following years. Enhanced melt opened a > 100 m deep 2 km2 depression and contributed to 6% of the mass loss of Siachen Glacier from 2010 to 2016 (−0.39 m w.e. a−1). We hypothesize that sub- or englacial melt may be responsible for this intriguing behaviour. This study contributes to a better knowledge of the regional pattern of the Karakoram anomaly and of the influence of rock avalanches on glacier mass changes. |
format |
Article in Journal/Newspaper |
author |
ETIENNE BERTHIER FANNY BRUN |
author_facet |
ETIENNE BERTHIER FANNY BRUN |
author_sort |
ETIENNE BERTHIER |
title |
Karakoram geodetic glacier mass balances between 2008 and 2016: persistence of the anomaly and influence of a large rock avalanche on Siachen Glacier |
title_short |
Karakoram geodetic glacier mass balances between 2008 and 2016: persistence of the anomaly and influence of a large rock avalanche on Siachen Glacier |
title_full |
Karakoram geodetic glacier mass balances between 2008 and 2016: persistence of the anomaly and influence of a large rock avalanche on Siachen Glacier |
title_fullStr |
Karakoram geodetic glacier mass balances between 2008 and 2016: persistence of the anomaly and influence of a large rock avalanche on Siachen Glacier |
title_full_unstemmed |
Karakoram geodetic glacier mass balances between 2008 and 2016: persistence of the anomaly and influence of a large rock avalanche on Siachen Glacier |
title_sort |
karakoram geodetic glacier mass balances between 2008 and 2016: persistence of the anomaly and influence of a large rock avalanche on siachen glacier |
publisher |
Cambridge University Press |
publishDate |
2019 |
url |
https://doi.org/10.1017/jog.2019.32 https://doaj.org/article/015f086c36ff4c2d8b922cc5f38c3036 |
long_lat |
ENVELOPE(163.800,163.800,-77.750,-77.750) |
geographic |
Geodetic Glacier |
geographic_facet |
Geodetic Glacier |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 65, Pp 494-507 (2019) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143019000327/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2019.32 0022-1430 1727-5652 https://doaj.org/article/015f086c36ff4c2d8b922cc5f38c3036 |
op_doi |
https://doi.org/10.1017/jog.2019.32 |
container_title |
Journal of Glaciology |
container_volume |
65 |
container_issue |
251 |
container_start_page |
494 |
op_container_end_page |
507 |
_version_ |
1766049115909652480 |