Abrupt permafrost thaw accelerates carbon dioxide and methane release at a tussock tundra site
Abrupt thaw could cause permafrost ecosystems to release more carbon than is predicted from gradual thaw alone. However, thermokarst feature mapping is limited in scope, and observed responses of carbon fluxes to abrupt thaw are variable. We developed a thermokarst detection algorithm that identifie...
Published in: | Arctic, Antarctic, and Alpine Research |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Taylor & Francis Group
2022
|
Subjects: | |
Online Access: | https://doi.org/10.1080/15230430.2022.2118639 https://doaj.org/article/4fd21c958ece47e88ef286ae5d946827 |
id |
fttriple:oai:gotriple.eu:oai:doaj.org/article:4fd21c958ece47e88ef286ae5d946827 |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:oai:doaj.org/article:4fd21c958ece47e88ef286ae5d946827 2023-05-15T14:14:24+02:00 Abrupt permafrost thaw accelerates carbon dioxide and methane release at a tussock tundra site Heidi Rodenhizer Fay Belshe Gerardo Celis Justin Ledman Marguerite Mauritz Scott Goetz Temuulen Sankey Edward A.G. Schuur 2022-12-01 https://doi.org/10.1080/15230430.2022.2118639 https://doaj.org/article/4fd21c958ece47e88ef286ae5d946827 en eng Taylor & Francis Group doi:10.1080/15230430.2022.2118639 1938-4246 1523-0430 https://doaj.org/article/4fd21c958ece47e88ef286ae5d946827 undefined Arctic, Antarctic, and Alpine Research, Vol 54, Iss 1, Pp 443-464 (2022) Arctic permafrost thermokarst carbon dioxide methane envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2022 fttriple https://doi.org/10.1080/15230430.2022.2118639 2023-01-22T17:49:54Z Abrupt thaw could cause permafrost ecosystems to release more carbon than is predicted from gradual thaw alone. However, thermokarst feature mapping is limited in scope, and observed responses of carbon fluxes to abrupt thaw are variable. We developed a thermokarst detection algorithm that identifies thermokarst features from a single elevation dataset with 71.5 percent accuracy and applied it in Healy, Alaska. Additionally, we investigated the landscape-level variation in carbon dioxide and methane fluxes by extent of abrupt thaw using eddy covariance. Seven percent of the site was classified as thermokarst. Water tracks were the most extensive form of thermokarst, although small pits were much more numerous. Abrupt thaw was positively correlated with carbon uptake during the growing season, when increases in gross primary productivity outpaced increases in ecosystem respiration in vegetation-dense water tracks. However, this was outweighed by higher carbon release in thermokarst features during the nongrowing season. Additionally, abrupt thaw was positively correlated with methane production nearly year-round. Our findings support the hypothesis that abrupt thaw of permafrost carbon will contribute to the permafrost climate feedback above and beyond that associated with gradual thaw and highlights the need to map thermokarst and incorporate abrupt thaw into Earth System Models. Article in Journal/Newspaper Antarctic and Alpine Research Arctic Arctic permafrost Thermokarst Tundra Alaska Unknown Arctic Arctic, Antarctic, and Alpine Research 54 1 443 464 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Arctic permafrost thermokarst carbon dioxide methane envir geo |
spellingShingle |
Arctic permafrost thermokarst carbon dioxide methane envir geo Heidi Rodenhizer Fay Belshe Gerardo Celis Justin Ledman Marguerite Mauritz Scott Goetz Temuulen Sankey Edward A.G. Schuur Abrupt permafrost thaw accelerates carbon dioxide and methane release at a tussock tundra site |
topic_facet |
Arctic permafrost thermokarst carbon dioxide methane envir geo |
description |
Abrupt thaw could cause permafrost ecosystems to release more carbon than is predicted from gradual thaw alone. However, thermokarst feature mapping is limited in scope, and observed responses of carbon fluxes to abrupt thaw are variable. We developed a thermokarst detection algorithm that identifies thermokarst features from a single elevation dataset with 71.5 percent accuracy and applied it in Healy, Alaska. Additionally, we investigated the landscape-level variation in carbon dioxide and methane fluxes by extent of abrupt thaw using eddy covariance. Seven percent of the site was classified as thermokarst. Water tracks were the most extensive form of thermokarst, although small pits were much more numerous. Abrupt thaw was positively correlated with carbon uptake during the growing season, when increases in gross primary productivity outpaced increases in ecosystem respiration in vegetation-dense water tracks. However, this was outweighed by higher carbon release in thermokarst features during the nongrowing season. Additionally, abrupt thaw was positively correlated with methane production nearly year-round. Our findings support the hypothesis that abrupt thaw of permafrost carbon will contribute to the permafrost climate feedback above and beyond that associated with gradual thaw and highlights the need to map thermokarst and incorporate abrupt thaw into Earth System Models. |
format |
Article in Journal/Newspaper |
author |
Heidi Rodenhizer Fay Belshe Gerardo Celis Justin Ledman Marguerite Mauritz Scott Goetz Temuulen Sankey Edward A.G. Schuur |
author_facet |
Heidi Rodenhizer Fay Belshe Gerardo Celis Justin Ledman Marguerite Mauritz Scott Goetz Temuulen Sankey Edward A.G. Schuur |
author_sort |
Heidi Rodenhizer |
title |
Abrupt permafrost thaw accelerates carbon dioxide and methane release at a tussock tundra site |
title_short |
Abrupt permafrost thaw accelerates carbon dioxide and methane release at a tussock tundra site |
title_full |
Abrupt permafrost thaw accelerates carbon dioxide and methane release at a tussock tundra site |
title_fullStr |
Abrupt permafrost thaw accelerates carbon dioxide and methane release at a tussock tundra site |
title_full_unstemmed |
Abrupt permafrost thaw accelerates carbon dioxide and methane release at a tussock tundra site |
title_sort |
abrupt permafrost thaw accelerates carbon dioxide and methane release at a tussock tundra site |
publisher |
Taylor & Francis Group |
publishDate |
2022 |
url |
https://doi.org/10.1080/15230430.2022.2118639 https://doaj.org/article/4fd21c958ece47e88ef286ae5d946827 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Antarctic and Alpine Research Arctic Arctic permafrost Thermokarst Tundra Alaska |
genre_facet |
Antarctic and Alpine Research Arctic Arctic permafrost Thermokarst Tundra Alaska |
op_source |
Arctic, Antarctic, and Alpine Research, Vol 54, Iss 1, Pp 443-464 (2022) |
op_relation |
doi:10.1080/15230430.2022.2118639 1938-4246 1523-0430 https://doaj.org/article/4fd21c958ece47e88ef286ae5d946827 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1080/15230430.2022.2118639 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
54 |
container_issue |
1 |
container_start_page |
443 |
op_container_end_page |
464 |
_version_ |
1766286881751826432 |