Controls on rapid supraglacial lake drainage in West Greenland: an Exploratory Data Analysis approach
The controls on rapid surface lake drainage on the Greenland ice sheet (GrIS) remain uncertain, making it challenging to incorporate lake drainage into models of GrIS hydrology, and so to determine the ice-dynamic impact of meltwater reaching the ice-sheet bed. Here, we first use a lake area and vol...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press
2018
|
Subjects: | |
Online Access: | https://doi.org/10.1017/jog.2018.8 https://doaj.org/article/5c706cf9672a47b3919a23be528d5d9e |
id |
ftdoajarticles:oai:doaj.org/article:5c706cf9672a47b3919a23be528d5d9e |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:5c706cf9672a47b3919a23be528d5d9e 2023-05-15T15:08:05+02:00 Controls on rapid supraglacial lake drainage in West Greenland: an Exploratory Data Analysis approach ANDREW G. WILLIAMSON IAN C. WILLIS NEIL S. ARNOLD ALISON F. BANWELL 2018-04-01T00:00:00Z https://doi.org/10.1017/jog.2018.8 https://doaj.org/article/5c706cf9672a47b3919a23be528d5d9e EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143018000084/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2018.8 0022-1430 1727-5652 https://doaj.org/article/5c706cf9672a47b3919a23be528d5d9e Journal of Glaciology, Vol 64, Pp 208-226 (2018) Arctic glaciology melt - surface remote sensing snow/ice surface processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2018 ftdoajarticles https://doi.org/10.1017/jog.2018.8 2023-03-12T01:30:59Z The controls on rapid surface lake drainage on the Greenland ice sheet (GrIS) remain uncertain, making it challenging to incorporate lake drainage into models of GrIS hydrology, and so to determine the ice-dynamic impact of meltwater reaching the ice-sheet bed. Here, we first use a lake area and volume tracking algorithm to identify rapidly draining lakes within West Greenland during summer 2014. Second, we derive hydrological, morphological, glaciological and surface-mass-balance data for various factors that may influence rapid lake drainage. Third, these factors are used within Exploratory Data Analysis to examine existing hypotheses for rapid lake drainage. This involves testing for statistical differences between the rapidly and non-rapidly draining lake types, as well as examining associations between lake size and the potential controlling factors. This study shows that the two lake types are statistically indistinguishable for almost all factors investigated, except lake area. Thus, we are unable to recommend an empirically supported, deterministic alternative to the fracture area threshold parameter for modelling rapid lake drainage within existing surface-hydrology models of the GrIS. However, if improved remotely sensed datasets (e.g. ice-velocity maps, climate model outputs) were included in future research, it may be possible to detect the causes of rapid drainage. Article in Journal/Newspaper Arctic Greenland Ice Sheet Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Arctic Greenland Rapid Lake ENVELOPE(177.619,177.619,52.064,52.064) Journal of Glaciology 64 244 208 226 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic glaciology melt - surface remote sensing snow/ice surface processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Arctic glaciology melt - surface remote sensing snow/ice surface processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 ANDREW G. WILLIAMSON IAN C. WILLIS NEIL S. ARNOLD ALISON F. BANWELL Controls on rapid supraglacial lake drainage in West Greenland: an Exploratory Data Analysis approach |
topic_facet |
Arctic glaciology melt - surface remote sensing snow/ice surface processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
The controls on rapid surface lake drainage on the Greenland ice sheet (GrIS) remain uncertain, making it challenging to incorporate lake drainage into models of GrIS hydrology, and so to determine the ice-dynamic impact of meltwater reaching the ice-sheet bed. Here, we first use a lake area and volume tracking algorithm to identify rapidly draining lakes within West Greenland during summer 2014. Second, we derive hydrological, morphological, glaciological and surface-mass-balance data for various factors that may influence rapid lake drainage. Third, these factors are used within Exploratory Data Analysis to examine existing hypotheses for rapid lake drainage. This involves testing for statistical differences between the rapidly and non-rapidly draining lake types, as well as examining associations between lake size and the potential controlling factors. This study shows that the two lake types are statistically indistinguishable for almost all factors investigated, except lake area. Thus, we are unable to recommend an empirically supported, deterministic alternative to the fracture area threshold parameter for modelling rapid lake drainage within existing surface-hydrology models of the GrIS. However, if improved remotely sensed datasets (e.g. ice-velocity maps, climate model outputs) were included in future research, it may be possible to detect the causes of rapid drainage. |
format |
Article in Journal/Newspaper |
author |
ANDREW G. WILLIAMSON IAN C. WILLIS NEIL S. ARNOLD ALISON F. BANWELL |
author_facet |
ANDREW G. WILLIAMSON IAN C. WILLIS NEIL S. ARNOLD ALISON F. BANWELL |
author_sort |
ANDREW G. WILLIAMSON |
title |
Controls on rapid supraglacial lake drainage in West Greenland: an Exploratory Data Analysis approach |
title_short |
Controls on rapid supraglacial lake drainage in West Greenland: an Exploratory Data Analysis approach |
title_full |
Controls on rapid supraglacial lake drainage in West Greenland: an Exploratory Data Analysis approach |
title_fullStr |
Controls on rapid supraglacial lake drainage in West Greenland: an Exploratory Data Analysis approach |
title_full_unstemmed |
Controls on rapid supraglacial lake drainage in West Greenland: an Exploratory Data Analysis approach |
title_sort |
controls on rapid supraglacial lake drainage in west greenland: an exploratory data analysis approach |
publisher |
Cambridge University Press |
publishDate |
2018 |
url |
https://doi.org/10.1017/jog.2018.8 https://doaj.org/article/5c706cf9672a47b3919a23be528d5d9e |
long_lat |
ENVELOPE(177.619,177.619,52.064,52.064) |
geographic |
Arctic Greenland Rapid Lake |
geographic_facet |
Arctic Greenland Rapid Lake |
genre |
Arctic Greenland Ice Sheet Journal of Glaciology |
genre_facet |
Arctic Greenland Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 64, Pp 208-226 (2018) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143018000084/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2018.8 0022-1430 1727-5652 https://doaj.org/article/5c706cf9672a47b3919a23be528d5d9e |
op_doi |
https://doi.org/10.1017/jog.2018.8 |
container_title |
Journal of Glaciology |
container_volume |
64 |
container_issue |
244 |
container_start_page |
208 |
op_container_end_page |
226 |
_version_ |
1766339506033655808 |