Water balance and its intra-annual variability in a permafrost catchment: hydrological interactions between catchment, lake and talik
Few hydrological studies have been made in Greenland with focus on permafrost hydrology rather than on the glacial hydrology associated with the Greenland ice sheet. Understanding permafrost hydrology, and its reflection and propagation of hydroclimatic change and variability, however, can be a key...
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ftcopernicus:oai:publications.copernicus.org:hessd21111 2023-05-15T15:10:50+02:00 Water balance and its intra-annual variability in a permafrost catchment: hydrological interactions between catchment, lake and talik Bosson, E. Lindborg, T. Berglund, S. Gustafsson, L.-G. Selroos, J.-O. Laudon, H. Claesson, L. L. Destouni, G. 2018-09-27 application/pdf https://doi.org/10.5194/hessd-10-9271-2013 https://www.hydrol-earth-syst-sci-discuss.net/hess-2013-282/ eng eng doi:10.5194/hessd-10-9271-2013 https://www.hydrol-earth-syst-sci-discuss.net/hess-2013-282/ eISSN: 1607-7938 Text 2018 ftcopernicus https://doi.org/10.5194/hessd-10-9271-2013 2019-12-24T09:55:13Z Few hydrological studies have been made in Greenland with focus on permafrost hydrology rather than on the glacial hydrology associated with the Greenland ice sheet. Understanding permafrost hydrology, and its reflection and propagation of hydroclimatic change and variability, however, can be a key to understand important climate change effects and feedbacks in arctic landscapes. This paper presents a new extensive and detailed hydrological dataset, with high temporal resolution of main hydrological parameters, for a permafrost catchment with a lake underlain by a talik close to the Greenland ice sheet in the Kangerlussuaq region, western Greenland. The paper describes the hydrological site investigations and data collection, and their synthesis and interpretation to develop a conceptual hydrological model. The catchment and lake water balances and their intra-annual variability, and uncertainty intervals for key water balance components, are quantified. The study incorporates all relevant hydrological processes within the catchment and, specifically, links the surface water system to both supra-permafrost and sub-permafrost groundwater. The dataset enabled water balance quantification with high degree of confidence. The measured hydraulic gradient between the lake and the groundwater in the talik shows this to be a groundwater recharging talik. Surface processes, dominated by evapotranspiration during the active flow period, and by snow dynamics during the frozen winter period, influence the temporal variation of groundwater pressure in the talik. This shows the hydrology in the catchment as being rather independent from external large-scale landscape features, including those of the close-by ice sheet. Text Arctic Climate change Greenland Ice Ice Sheet Kangerlussuaq permafrost Copernicus Publications: E-Journals Arctic Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) Talik ENVELOPE(146.601,146.601,59.667,59.667) |
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Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Few hydrological studies have been made in Greenland with focus on permafrost hydrology rather than on the glacial hydrology associated with the Greenland ice sheet. Understanding permafrost hydrology, and its reflection and propagation of hydroclimatic change and variability, however, can be a key to understand important climate change effects and feedbacks in arctic landscapes. This paper presents a new extensive and detailed hydrological dataset, with high temporal resolution of main hydrological parameters, for a permafrost catchment with a lake underlain by a talik close to the Greenland ice sheet in the Kangerlussuaq region, western Greenland. The paper describes the hydrological site investigations and data collection, and their synthesis and interpretation to develop a conceptual hydrological model. The catchment and lake water balances and their intra-annual variability, and uncertainty intervals for key water balance components, are quantified. The study incorporates all relevant hydrological processes within the catchment and, specifically, links the surface water system to both supra-permafrost and sub-permafrost groundwater. The dataset enabled water balance quantification with high degree of confidence. The measured hydraulic gradient between the lake and the groundwater in the talik shows this to be a groundwater recharging talik. Surface processes, dominated by evapotranspiration during the active flow period, and by snow dynamics during the frozen winter period, influence the temporal variation of groundwater pressure in the talik. This shows the hydrology in the catchment as being rather independent from external large-scale landscape features, including those of the close-by ice sheet. |
format |
Text |
author |
Bosson, E. Lindborg, T. Berglund, S. Gustafsson, L.-G. Selroos, J.-O. Laudon, H. Claesson, L. L. Destouni, G. |
spellingShingle |
Bosson, E. Lindborg, T. Berglund, S. Gustafsson, L.-G. Selroos, J.-O. Laudon, H. Claesson, L. L. Destouni, G. Water balance and its intra-annual variability in a permafrost catchment: hydrological interactions between catchment, lake and talik |
author_facet |
Bosson, E. Lindborg, T. Berglund, S. Gustafsson, L.-G. Selroos, J.-O. Laudon, H. Claesson, L. L. Destouni, G. |
author_sort |
Bosson, E. |
title |
Water balance and its intra-annual variability in a permafrost catchment: hydrological interactions between catchment, lake and talik |
title_short |
Water balance and its intra-annual variability in a permafrost catchment: hydrological interactions between catchment, lake and talik |
title_full |
Water balance and its intra-annual variability in a permafrost catchment: hydrological interactions between catchment, lake and talik |
title_fullStr |
Water balance and its intra-annual variability in a permafrost catchment: hydrological interactions between catchment, lake and talik |
title_full_unstemmed |
Water balance and its intra-annual variability in a permafrost catchment: hydrological interactions between catchment, lake and talik |
title_sort |
water balance and its intra-annual variability in a permafrost catchment: hydrological interactions between catchment, lake and talik |
publishDate |
2018 |
url |
https://doi.org/10.5194/hessd-10-9271-2013 https://www.hydrol-earth-syst-sci-discuss.net/hess-2013-282/ |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) ENVELOPE(146.601,146.601,59.667,59.667) |
geographic |
Arctic Greenland Kangerlussuaq Talik |
geographic_facet |
Arctic Greenland Kangerlussuaq Talik |
genre |
Arctic Climate change Greenland Ice Ice Sheet Kangerlussuaq permafrost |
genre_facet |
Arctic Climate change Greenland Ice Ice Sheet Kangerlussuaq permafrost |
op_source |
eISSN: 1607-7938 |
op_relation |
doi:10.5194/hessd-10-9271-2013 https://www.hydrol-earth-syst-sci-discuss.net/hess-2013-282/ |
op_doi |
https://doi.org/10.5194/hessd-10-9271-2013 |
_version_ |
1766341780202061824 |