Monitoring 13 years of drastic catchment change and the hydroecological responses of a drained thermokarst lake
Catastrophic drainage of thermokarst lakes transforms portions of former lakebed to terrestrial settings, which have largely unknown consequences for the remaining aquatic habitat. Old Crow Flats, northern Yukon (Canada), is a lake-rich area that has recently experienced a climate-driven increase in...
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Canadian Science Publishing
2022
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ftdoajarticles:oai:doaj.org/article:f1606ecd35164edb93dd172fd66ffe4a 2023-05-15T14:23:51+02:00 Monitoring 13 years of drastic catchment change and the hydroecological responses of a drained thermokarst lake Kevin W. Turner Brent B. Wolfe Ian McDonald 2022-12-01T00:00:00Z https://doi.org/10.1139/as-2020-0022 https://doaj.org/article/f1606ecd35164edb93dd172fd66ffe4a EN FR eng fre Canadian Science Publishing https://cdnsciencepub.com/doi/10.1139/as-2020-0022 https://doaj.org/toc/2368-7460 doi:10.1139/as-2020-0022 2368-7460 https://doaj.org/article/f1606ecd35164edb93dd172fd66ffe4a Arctic Science, Vol 8, Iss 4, Pp 1094-1115 (2022) water isotopes thermokarst lake drainage remotely piloted aircraft systems UAV drone AVIRIS-NG Environmental sciences GE1-350 Environmental engineering TA170-171 article 2022 ftdoajarticles https://doi.org/10.1139/as-2020-0022 2022-12-30T19:37:42Z Catastrophic drainage of thermokarst lakes transforms portions of former lakebed to terrestrial settings, which have largely unknown consequences for the remaining aquatic habitat. Old Crow Flats, northern Yukon (Canada), is a lake-rich area that has recently experienced a climate-driven increase in lake drainage frequency. A notable example occurred during June 2007 when Zelma Lake (originally 12 km2) lost over 80% of its volume. Here we integrate remote sensing techniques with in situ hydrological and limnological measurements over 13 years following drainage to (1) monitor water surface area and terrestrial land cover change and (2) identify associated effects on aquatic conditions. An airborne drone system was used to provide training data for land cover classification of AVIRIS-NG data, which indicated that tall willow shrubs covered 30.8% of the former lake area by 2017. Lake water isotope-derived deuterium excess increased during the 13-year record indicating that hydrological input increased with greater snowpack accumulation within encroaching vegetation. Limnological conditions were highly variable and eutrophic during the first few years following drainage but became more stable as vegetation colonized the former lakebed. This long-term study provides insight into aquatic responses to thermokarst lake drainage and shrub vegetation proliferation, which are increasing in many Arctic and subarctic landscapes. Article in Journal/Newspaper Arctic Arctic Old Crow Subarctic Thermokarst Yukon Directory of Open Access Journals: DOAJ Articles Arctic Canada Old Crow Flats ENVELOPE(-139.755,-139.755,68.083,68.083) Yukon Arctic Science |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English French |
topic |
water isotopes thermokarst lake drainage remotely piloted aircraft systems UAV drone AVIRIS-NG Environmental sciences GE1-350 Environmental engineering TA170-171 |
spellingShingle |
water isotopes thermokarst lake drainage remotely piloted aircraft systems UAV drone AVIRIS-NG Environmental sciences GE1-350 Environmental engineering TA170-171 Kevin W. Turner Brent B. Wolfe Ian McDonald Monitoring 13 years of drastic catchment change and the hydroecological responses of a drained thermokarst lake |
topic_facet |
water isotopes thermokarst lake drainage remotely piloted aircraft systems UAV drone AVIRIS-NG Environmental sciences GE1-350 Environmental engineering TA170-171 |
description |
Catastrophic drainage of thermokarst lakes transforms portions of former lakebed to terrestrial settings, which have largely unknown consequences for the remaining aquatic habitat. Old Crow Flats, northern Yukon (Canada), is a lake-rich area that has recently experienced a climate-driven increase in lake drainage frequency. A notable example occurred during June 2007 when Zelma Lake (originally 12 km2) lost over 80% of its volume. Here we integrate remote sensing techniques with in situ hydrological and limnological measurements over 13 years following drainage to (1) monitor water surface area and terrestrial land cover change and (2) identify associated effects on aquatic conditions. An airborne drone system was used to provide training data for land cover classification of AVIRIS-NG data, which indicated that tall willow shrubs covered 30.8% of the former lake area by 2017. Lake water isotope-derived deuterium excess increased during the 13-year record indicating that hydrological input increased with greater snowpack accumulation within encroaching vegetation. Limnological conditions were highly variable and eutrophic during the first few years following drainage but became more stable as vegetation colonized the former lakebed. This long-term study provides insight into aquatic responses to thermokarst lake drainage and shrub vegetation proliferation, which are increasing in many Arctic and subarctic landscapes. |
format |
Article in Journal/Newspaper |
author |
Kevin W. Turner Brent B. Wolfe Ian McDonald |
author_facet |
Kevin W. Turner Brent B. Wolfe Ian McDonald |
author_sort |
Kevin W. Turner |
title |
Monitoring 13 years of drastic catchment change and the hydroecological responses of a drained thermokarst lake |
title_short |
Monitoring 13 years of drastic catchment change and the hydroecological responses of a drained thermokarst lake |
title_full |
Monitoring 13 years of drastic catchment change and the hydroecological responses of a drained thermokarst lake |
title_fullStr |
Monitoring 13 years of drastic catchment change and the hydroecological responses of a drained thermokarst lake |
title_full_unstemmed |
Monitoring 13 years of drastic catchment change and the hydroecological responses of a drained thermokarst lake |
title_sort |
monitoring 13 years of drastic catchment change and the hydroecological responses of a drained thermokarst lake |
publisher |
Canadian Science Publishing |
publishDate |
2022 |
url |
https://doi.org/10.1139/as-2020-0022 https://doaj.org/article/f1606ecd35164edb93dd172fd66ffe4a |
long_lat |
ENVELOPE(-139.755,-139.755,68.083,68.083) |
geographic |
Arctic Canada Old Crow Flats Yukon |
geographic_facet |
Arctic Canada Old Crow Flats Yukon |
genre |
Arctic Arctic Old Crow Subarctic Thermokarst Yukon |
genre_facet |
Arctic Arctic Old Crow Subarctic Thermokarst Yukon |
op_source |
Arctic Science, Vol 8, Iss 4, Pp 1094-1115 (2022) |
op_relation |
https://cdnsciencepub.com/doi/10.1139/as-2020-0022 https://doaj.org/toc/2368-7460 doi:10.1139/as-2020-0022 2368-7460 https://doaj.org/article/f1606ecd35164edb93dd172fd66ffe4a |
op_doi |
https://doi.org/10.1139/as-2020-0022 |
container_title |
Arctic Science |
_version_ |
1766296320840040448 |