Thermokarst and precipitation drive changes in the area of lakes and ponds in the National Parks of northwestern Alaska, 1984–2018
Lakes and ponds are important ecosystem components in arctic lowlands, and they are prone to rapid changes in surface area by thermokarst expansion and by sudden lake drainage. The 30 m resolution Landsat record (1984–2018) was used to derive a record of changes in the area of lakes and ponds in the...
Published in: | Arctic, Antarctic, and Alpine Research |
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Language: | English |
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Taylor & Francis Group
2019
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Online Access: | https://doi.org/10.1080/15230430.2019.1629222 https://doaj.org/article/27c7d50cf3c04682abf14d037d0e12b5 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:27c7d50cf3c04682abf14d037d0e12b5 2023-05-15T14:14:23+02:00 Thermokarst and precipitation drive changes in the area of lakes and ponds in the National Parks of northwestern Alaska, 1984–2018 David K. Swanson 2019-01-01 https://doi.org/10.1080/15230430.2019.1629222 https://doaj.org/article/27c7d50cf3c04682abf14d037d0e12b5 en eng Taylor & Francis Group 1523-0430 1938-4246 doi:10.1080/15230430.2019.1629222 https://doaj.org/article/27c7d50cf3c04682abf14d037d0e12b5 undefined Arctic, Antarctic, and Alpine Research, Vol 51, Iss 1, Pp 265-279 (2019) permafrost hydrology lakes thermokarst lake drainage landsat geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2019 fttriple https://doi.org/10.1080/15230430.2019.1629222 2023-01-22T17:53:22Z Lakes and ponds are important ecosystem components in arctic lowlands, and they are prone to rapid changes in surface area by thermokarst expansion and by sudden lake drainage. The 30 m resolution Landsat record (1984–2018) was used to derive a record of changes in the area of lakes and ponds in the five National Parks of northern Alaska. Surface-water area declined significantly in portions of the study area with ice-rich permafros t and water bodies of thermokarst origin. These declines were associated with rapid lake drainage events resulting from the thermoerosion of outlets. Thermoerosion was probably favored by the record warm mean annual temperatures in the study area, combined with precipitation that fluctuated near long-term normals. The rate of lake loss by rapid drainage was greatest in 2005–2007 and 2018. In landscapes with permafrost of lower ice content and water bodies in depressions of non-thermokarst origin, surface-water area generally fluctuated in response to year-to-year changes in precipitation, without a long-term trend, and lake drainage events were rare. Loss of surface water in ice-rich lowlands is likely to continue as the climate warms, with associated impacts on aquatic wildlife. Article in Journal/Newspaper Antarctic and Alpine Research Arctic Arctic Ice permafrost Thermokarst Alaska Unknown Arctic Rapid Lake ENVELOPE(177.619,177.619,52.064,52.064) Arctic, Antarctic, and Alpine Research 51 1 265 279 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
permafrost hydrology lakes thermokarst lake drainage landsat geo envir |
spellingShingle |
permafrost hydrology lakes thermokarst lake drainage landsat geo envir David K. Swanson Thermokarst and precipitation drive changes in the area of lakes and ponds in the National Parks of northwestern Alaska, 1984–2018 |
topic_facet |
permafrost hydrology lakes thermokarst lake drainage landsat geo envir |
description |
Lakes and ponds are important ecosystem components in arctic lowlands, and they are prone to rapid changes in surface area by thermokarst expansion and by sudden lake drainage. The 30 m resolution Landsat record (1984–2018) was used to derive a record of changes in the area of lakes and ponds in the five National Parks of northern Alaska. Surface-water area declined significantly in portions of the study area with ice-rich permafros t and water bodies of thermokarst origin. These declines were associated with rapid lake drainage events resulting from the thermoerosion of outlets. Thermoerosion was probably favored by the record warm mean annual temperatures in the study area, combined with precipitation that fluctuated near long-term normals. The rate of lake loss by rapid drainage was greatest in 2005–2007 and 2018. In landscapes with permafrost of lower ice content and water bodies in depressions of non-thermokarst origin, surface-water area generally fluctuated in response to year-to-year changes in precipitation, without a long-term trend, and lake drainage events were rare. Loss of surface water in ice-rich lowlands is likely to continue as the climate warms, with associated impacts on aquatic wildlife. |
format |
Article in Journal/Newspaper |
author |
David K. Swanson |
author_facet |
David K. Swanson |
author_sort |
David K. Swanson |
title |
Thermokarst and precipitation drive changes in the area of lakes and ponds in the National Parks of northwestern Alaska, 1984–2018 |
title_short |
Thermokarst and precipitation drive changes in the area of lakes and ponds in the National Parks of northwestern Alaska, 1984–2018 |
title_full |
Thermokarst and precipitation drive changes in the area of lakes and ponds in the National Parks of northwestern Alaska, 1984–2018 |
title_fullStr |
Thermokarst and precipitation drive changes in the area of lakes and ponds in the National Parks of northwestern Alaska, 1984–2018 |
title_full_unstemmed |
Thermokarst and precipitation drive changes in the area of lakes and ponds in the National Parks of northwestern Alaska, 1984–2018 |
title_sort |
thermokarst and precipitation drive changes in the area of lakes and ponds in the national parks of northwestern alaska, 1984–2018 |
publisher |
Taylor & Francis Group |
publishDate |
2019 |
url |
https://doi.org/10.1080/15230430.2019.1629222 https://doaj.org/article/27c7d50cf3c04682abf14d037d0e12b5 |
long_lat |
ENVELOPE(177.619,177.619,52.064,52.064) |
geographic |
Arctic Rapid Lake |
geographic_facet |
Arctic Rapid Lake |
genre |
Antarctic and Alpine Research Arctic Arctic Ice permafrost Thermokarst Alaska |
genre_facet |
Antarctic and Alpine Research Arctic Arctic Ice permafrost Thermokarst Alaska |
op_source |
Arctic, Antarctic, and Alpine Research, Vol 51, Iss 1, Pp 265-279 (2019) |
op_relation |
1523-0430 1938-4246 doi:10.1080/15230430.2019.1629222 https://doaj.org/article/27c7d50cf3c04682abf14d037d0e12b5 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1080/15230430.2019.1629222 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
51 |
container_issue |
1 |
container_start_page |
265 |
op_container_end_page |
279 |
_version_ |
1766286875181449216 |