The influence of thermokarst disturbance on the water quality of small upland lakes, Mackenzie Delta region, Northwest Territories, Canada
Chemical data are presented for water from 22 lakes in small upland catchments (<20 ha) between Inuvik and Richards Island, Northwest Territories, Canada. Eleven of the basins appear pristine and 11 are affected by thermokarst slumping. The mean dissolved organic carbon (DOC) concentration of the...
Published in: | Permafrost and Periglacial Processes |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2005
|
Subjects: | |
Online Access: | https://ir.library.carleton.ca/pub/2633 https://doi.org/10.1002/ppp.536 |
id |
ftcarletonunivir:oai:carleton.ca:2633 |
---|---|
record_format |
openpolar |
spelling |
ftcarletonunivir:oai:carleton.ca:2633 2023-05-15T15:07:11+02:00 The influence of thermokarst disturbance on the water quality of small upland lakes, Mackenzie Delta region, Northwest Territories, Canada Kokelj, S.V. Jenkins, R.E. Milburn, D. Burn, C. (Christopher R.) Snow, N. 2005-10-01 https://ir.library.carleton.ca/pub/2633 https://doi.org/10.1002/ppp.536 en eng https://ir.library.carleton.ca/pub/2633 doi:10.1002/ppp.536 Permafrost and Periglacial Processes vol. 16 no. 4, pp. 343-353 Climate change Permafrost degradation Thermokarst Tundra lakes Water chemistry Western Arctic info:eu-repo/semantics/article 2005 ftcarletonunivir https://doi.org/10.1002/ppp.536 2022-02-06T21:51:17Z Chemical data are presented for water from 22 lakes in small upland catchments (<20 ha) between Inuvik and Richards Island, Northwest Territories, Canada. Eleven of the basins appear pristine and 11 are affected by thermokarst slumping. The mean dissolved organic carbon (DOC) concentration of the pristine lakes (16.3 mg/l) is greater than the mean concentration of lakes disturbed by thermokarst slumping (10.5mg/l). In pristine lakes, mean concentrations of Ca, Mg and SO4 are 9.6, 3.6 and 11.1 mg/l, but in lakes affected by thermokarst, mean concentrations are 72.6, 26.8 and 208.2 mg/l, respectively. Soluble materials released from degrading permafrost are transported to lakes by surface runoff, elevating concentrations in lake water. The percentage of total basin area influenced by thermokarst is positively associated with ionic concentrations in lake water and inversely related to DOC. Thermokarst occupying as little as 2% of catchment area may modify the chemistry of lake water, and water quality may remain affected for several decades after slump development has ceased. Aerial photographs indicate that 5 to 15% of all lakes and ponds in four 49 km2 areas between Inuvik and Richards Island are small (median size <2 ha) with catch Article in Journal/Newspaper Arctic Climate change Inuvik Mackenzie Delta Northwest Territories permafrost Permafrost and Periglacial Processes Richards Island Thermokarst Tundra Carleton University's Institutional Repository Arctic Canada Inuvik ENVELOPE(-133.610,-133.610,68.341,68.341) Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Northwest Territories Permafrost and Periglacial Processes 16 4 343 353 |
institution |
Open Polar |
collection |
Carleton University's Institutional Repository |
op_collection_id |
ftcarletonunivir |
language |
English |
topic |
Climate change Permafrost degradation Thermokarst Tundra lakes Water chemistry Western Arctic |
spellingShingle |
Climate change Permafrost degradation Thermokarst Tundra lakes Water chemistry Western Arctic Kokelj, S.V. Jenkins, R.E. Milburn, D. Burn, C. (Christopher R.) Snow, N. The influence of thermokarst disturbance on the water quality of small upland lakes, Mackenzie Delta region, Northwest Territories, Canada |
topic_facet |
Climate change Permafrost degradation Thermokarst Tundra lakes Water chemistry Western Arctic |
description |
Chemical data are presented for water from 22 lakes in small upland catchments (<20 ha) between Inuvik and Richards Island, Northwest Territories, Canada. Eleven of the basins appear pristine and 11 are affected by thermokarst slumping. The mean dissolved organic carbon (DOC) concentration of the pristine lakes (16.3 mg/l) is greater than the mean concentration of lakes disturbed by thermokarst slumping (10.5mg/l). In pristine lakes, mean concentrations of Ca, Mg and SO4 are 9.6, 3.6 and 11.1 mg/l, but in lakes affected by thermokarst, mean concentrations are 72.6, 26.8 and 208.2 mg/l, respectively. Soluble materials released from degrading permafrost are transported to lakes by surface runoff, elevating concentrations in lake water. The percentage of total basin area influenced by thermokarst is positively associated with ionic concentrations in lake water and inversely related to DOC. Thermokarst occupying as little as 2% of catchment area may modify the chemistry of lake water, and water quality may remain affected for several decades after slump development has ceased. Aerial photographs indicate that 5 to 15% of all lakes and ponds in four 49 km2 areas between Inuvik and Richards Island are small (median size <2 ha) with catch |
format |
Article in Journal/Newspaper |
author |
Kokelj, S.V. Jenkins, R.E. Milburn, D. Burn, C. (Christopher R.) Snow, N. |
author_facet |
Kokelj, S.V. Jenkins, R.E. Milburn, D. Burn, C. (Christopher R.) Snow, N. |
author_sort |
Kokelj, S.V. |
title |
The influence of thermokarst disturbance on the water quality of small upland lakes, Mackenzie Delta region, Northwest Territories, Canada |
title_short |
The influence of thermokarst disturbance on the water quality of small upland lakes, Mackenzie Delta region, Northwest Territories, Canada |
title_full |
The influence of thermokarst disturbance on the water quality of small upland lakes, Mackenzie Delta region, Northwest Territories, Canada |
title_fullStr |
The influence of thermokarst disturbance on the water quality of small upland lakes, Mackenzie Delta region, Northwest Territories, Canada |
title_full_unstemmed |
The influence of thermokarst disturbance on the water quality of small upland lakes, Mackenzie Delta region, Northwest Territories, Canada |
title_sort |
influence of thermokarst disturbance on the water quality of small upland lakes, mackenzie delta region, northwest territories, canada |
publishDate |
2005 |
url |
https://ir.library.carleton.ca/pub/2633 https://doi.org/10.1002/ppp.536 |
long_lat |
ENVELOPE(-133.610,-133.610,68.341,68.341) ENVELOPE(-136.672,-136.672,68.833,68.833) |
geographic |
Arctic Canada Inuvik Mackenzie Delta Northwest Territories |
geographic_facet |
Arctic Canada Inuvik Mackenzie Delta Northwest Territories |
genre |
Arctic Climate change Inuvik Mackenzie Delta Northwest Territories permafrost Permafrost and Periglacial Processes Richards Island Thermokarst Tundra |
genre_facet |
Arctic Climate change Inuvik Mackenzie Delta Northwest Territories permafrost Permafrost and Periglacial Processes Richards Island Thermokarst Tundra |
op_source |
Permafrost and Periglacial Processes vol. 16 no. 4, pp. 343-353 |
op_relation |
https://ir.library.carleton.ca/pub/2633 doi:10.1002/ppp.536 |
op_doi |
https://doi.org/10.1002/ppp.536 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
16 |
container_issue |
4 |
container_start_page |
343 |
op_container_end_page |
353 |
_version_ |
1766338739689226240 |