Volatile Organic Compound fluxes in a subarctic peatland and lake
Arctic climate is warming twice as much as the global average, due to a number of climate system feedbacks, including albedo change due to retreating snow cover and sea ice, and the forest cover expansion across the open tundra. Northern ecosystems are known to emit trace gases (e.g., methane and vo...
Main Authors: | , , , , , , , , , , |
---|---|
Format: | Conference Object |
Language: | English |
Published: |
2020
|
Subjects: | |
Online Access: | https://curis.ku.dk/portal/da/publications/volatile-organic-compound-fluxes-in-a-subarctic-peatland-and-lake(9083174c-1259-4c79-8040-879678ffe9e7).html https://doi.org/10.5194/egusphere-egu2020-9007 |
id |
ftcopenhagenunip:oai:pure.atira.dk:publications/9083174c-1259-4c79-8040-879678ffe9e7 |
---|---|
record_format |
openpolar |
spelling |
ftcopenhagenunip:oai:pure.atira.dk:publications/9083174c-1259-4c79-8040-879678ffe9e7 2023-07-23T04:12:46+02:00 Volatile Organic Compound fluxes in a subarctic peatland and lake Seco, Roger Holst, Thomas Westergaard-Nielsen, Andreas Li, Tao Simin, Tihomir Jansen, Joachim Crill, Patrick Friborg, Thomas Holst, Jutta Rinne, Janne Rinnan, Riikka 2020 https://curis.ku.dk/portal/da/publications/volatile-organic-compound-fluxes-in-a-subarctic-peatland-and-lake(9083174c-1259-4c79-8040-879678ffe9e7).html https://doi.org/10.5194/egusphere-egu2020-9007 eng eng info:eu-repo/semantics/openAccess Seco , R , Holst , T , Westergaard-Nielsen , A , Li , T , Simin , T , Jansen , J , Crill , P , Friborg , T , Holst , J , Rinne , J & Rinnan , R 2020 , ' Volatile Organic Compound fluxes in a subarctic peatland and lake ' , EGU General Assembly 2020 , 04/05/2020 - 08/05/2020 . https://doi.org/10.5194/egusphere-egu2020-9007 conferenceObject 2020 ftcopenhagenunip https://doi.org/10.5194/egusphere-egu2020-9007 2023-07-05T23:17:34Z Arctic climate is warming twice as much as the global average, due to a number of climate system feedbacks, including albedo change due to retreating snow cover and sea ice, and the forest cover expansion across the open tundra. Northern ecosystems are known to emit trace gases (e.g., methane and volatile organic compounds, VOCs) to the atmosphere, from sources as diverse as soils, vegetation and lakes. These trace gas fluxes are likely to show a trend towards greater emissions with climate warming. Here we report ecosystem-level VOC fluxes from Stordalen Mire, a subarctic peatland complex with a high fraction of open pond and lake surfaces, underlain by discontinuous permafrost and located in the Subarctic Sweden (68º20' N, 19º03' E). In 2018, we deployed two online mass spectrometers (PTR-TOF-MS) to measure rapid fluctuations in VOC mixing ratios and to quantify ecosystem-level fluxes with the eddy covariance technique. One of the instruments obtained a growing-season-long dataset of biogenic emissions from palsa mire vegetation dominated by mosses (e.g., Sphagnum spp.), graminoids (such as Eriophorum spp. and Carex spp.), dwarf shrubs (e.g. Empetrum spp. and Betula nana) surrounding the ICOS Sweden Abisko-Stordalen long-term measurement station. The second instrument measured VOC fluxes during two contrasting periods (the peak and the end of the growing season) from a subarctic lake and its adjacent fen, permafrost-free, minerotrophic wetland with vegetation dominated by tall graminoids, mainly Carex rostrata and Eriophorum angustifolium. At both sites, isoprene was the dominant VOC emitted by vegetation, showing clear diurnal patterns along the season and especially during the peak of the growing season in July. At the ICOS Sweden station, isoprene fluxes exceeded 2 nmol m-2 s-1 on several days in July, with a July monthly average midday emission of 1 nmol m-2 s-1. The fen site showed average midday emissions of 2 nmol m-2 s-1 during the peak growing season. Other VOCs emitted by vegetation at both sites in ... Conference Object Abisko albedo Arctic Betula nana Eriophorum Ice palsa permafrost Sea ice Subarctic Tundra University of Copenhagen: Research Abisko ENVELOPE(18.829,18.829,68.349,68.349) Arctic Stordalen ENVELOPE(7.337,7.337,62.510,62.510) |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Arctic climate is warming twice as much as the global average, due to a number of climate system feedbacks, including albedo change due to retreating snow cover and sea ice, and the forest cover expansion across the open tundra. Northern ecosystems are known to emit trace gases (e.g., methane and volatile organic compounds, VOCs) to the atmosphere, from sources as diverse as soils, vegetation and lakes. These trace gas fluxes are likely to show a trend towards greater emissions with climate warming. Here we report ecosystem-level VOC fluxes from Stordalen Mire, a subarctic peatland complex with a high fraction of open pond and lake surfaces, underlain by discontinuous permafrost and located in the Subarctic Sweden (68º20' N, 19º03' E). In 2018, we deployed two online mass spectrometers (PTR-TOF-MS) to measure rapid fluctuations in VOC mixing ratios and to quantify ecosystem-level fluxes with the eddy covariance technique. One of the instruments obtained a growing-season-long dataset of biogenic emissions from palsa mire vegetation dominated by mosses (e.g., Sphagnum spp.), graminoids (such as Eriophorum spp. and Carex spp.), dwarf shrubs (e.g. Empetrum spp. and Betula nana) surrounding the ICOS Sweden Abisko-Stordalen long-term measurement station. The second instrument measured VOC fluxes during two contrasting periods (the peak and the end of the growing season) from a subarctic lake and its adjacent fen, permafrost-free, minerotrophic wetland with vegetation dominated by tall graminoids, mainly Carex rostrata and Eriophorum angustifolium. At both sites, isoprene was the dominant VOC emitted by vegetation, showing clear diurnal patterns along the season and especially during the peak of the growing season in July. At the ICOS Sweden station, isoprene fluxes exceeded 2 nmol m-2 s-1 on several days in July, with a July monthly average midday emission of 1 nmol m-2 s-1. The fen site showed average midday emissions of 2 nmol m-2 s-1 during the peak growing season. Other VOCs emitted by vegetation at both sites in ... |
format |
Conference Object |
author |
Seco, Roger Holst, Thomas Westergaard-Nielsen, Andreas Li, Tao Simin, Tihomir Jansen, Joachim Crill, Patrick Friborg, Thomas Holst, Jutta Rinne, Janne Rinnan, Riikka |
spellingShingle |
Seco, Roger Holst, Thomas Westergaard-Nielsen, Andreas Li, Tao Simin, Tihomir Jansen, Joachim Crill, Patrick Friborg, Thomas Holst, Jutta Rinne, Janne Rinnan, Riikka Volatile Organic Compound fluxes in a subarctic peatland and lake |
author_facet |
Seco, Roger Holst, Thomas Westergaard-Nielsen, Andreas Li, Tao Simin, Tihomir Jansen, Joachim Crill, Patrick Friborg, Thomas Holst, Jutta Rinne, Janne Rinnan, Riikka |
author_sort |
Seco, Roger |
title |
Volatile Organic Compound fluxes in a subarctic peatland and lake |
title_short |
Volatile Organic Compound fluxes in a subarctic peatland and lake |
title_full |
Volatile Organic Compound fluxes in a subarctic peatland and lake |
title_fullStr |
Volatile Organic Compound fluxes in a subarctic peatland and lake |
title_full_unstemmed |
Volatile Organic Compound fluxes in a subarctic peatland and lake |
title_sort |
volatile organic compound fluxes in a subarctic peatland and lake |
publishDate |
2020 |
url |
https://curis.ku.dk/portal/da/publications/volatile-organic-compound-fluxes-in-a-subarctic-peatland-and-lake(9083174c-1259-4c79-8040-879678ffe9e7).html https://doi.org/10.5194/egusphere-egu2020-9007 |
long_lat |
ENVELOPE(18.829,18.829,68.349,68.349) ENVELOPE(7.337,7.337,62.510,62.510) |
geographic |
Abisko Arctic Stordalen |
geographic_facet |
Abisko Arctic Stordalen |
genre |
Abisko albedo Arctic Betula nana Eriophorum Ice palsa permafrost Sea ice Subarctic Tundra |
genre_facet |
Abisko albedo Arctic Betula nana Eriophorum Ice palsa permafrost Sea ice Subarctic Tundra |
op_source |
Seco , R , Holst , T , Westergaard-Nielsen , A , Li , T , Simin , T , Jansen , J , Crill , P , Friborg , T , Holst , J , Rinne , J & Rinnan , R 2020 , ' Volatile Organic Compound fluxes in a subarctic peatland and lake ' , EGU General Assembly 2020 , 04/05/2020 - 08/05/2020 . https://doi.org/10.5194/egusphere-egu2020-9007 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-egu2020-9007 |
_version_ |
1772186203303444480 |