Annual carbon gas budget for a subarctic peatland, Northern Sweden
Temperatures in the Arctic regions are rising, thawing permafrost and exposing previously stable soil organic carbon (OC) to decomposition. This can result in northern latitude soils, which have accumulated large amounts of OC potentially shifting from atmospheric C sinks to C sources with positive...
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ftulundlup:oai:lup.lub.lu.se:a39c49dc-d715-4434-8ce7-729ea2f27861 2023-05-15T15:14:24+02:00 Annual carbon gas budget for a subarctic peatland, Northern Sweden Backstrand, K. Crill, P. M. Jackowicz-Korczynski, Marcin Mastepanov, Mikhail Christensen, T. R. Bastviken, D. 2010 https://lup.lub.lu.se/record/1571167 eng eng Copernicus GmbH https://lup.lub.lu.se/record/1571167 wos:000274058100008 scopus:75749098140 Biogeosciences; 7(1), pp 95-108 (2010) ISSN: 1726-4189 Physical Geography contributiontojournal/article info:eu-repo/semantics/article text 2010 ftulundlup 2023-02-01T23:29:40Z Temperatures in the Arctic regions are rising, thawing permafrost and exposing previously stable soil organic carbon (OC) to decomposition. This can result in northern latitude soils, which have accumulated large amounts of OC potentially shifting from atmospheric C sinks to C sources with positive feedback on climate warming. In this paper, we estimate the annual net C gas balance (NCB) of the subarctic mire Stordalen, based on automatic chamber measurements of CO2 and total hydrocarbon (THC; CH4 and NMVOCs) exchange. We studied the dominant vegetation communities with different moisture and permafrost characteristics; a dry Palsa underlain by permafrost, an intermediate thaw site with Sphagnum spp. and a wet site with Eriophorum spp. where the soil thaws completely. Whole year accumulated fluxes of CO2 were estimated to 29.7, -35.3 and -34.9 gC m(-2) respectively for the Palsa, Sphagnum and Eriophorum sites (positive flux indicates an addition of C to the atmospheric pool). The corresponding annual THC emissions were 0.5, 6.2 and 31.8 gC m(-2) for the same sites. Therefore, the NCB for each of the sites was 30.2, -29.1 and -3.1 gC m(-2) respectively for the Palsa, Sphagnum and Eriophorum site. On average, the whole mire was a CO2 sink of 2.6 gC m(-2) and a THC source of 6.4 gC m(-2) over a year. Consequently, the mire was a net source of C to the atmosphere by 3.9 gC m(-2) (based on area weighted estimates for each of the three plant communities). Early and late snow season efflux of CO2 and THC emphasize the importance of winter measurements for complete annual C budgets. Decadal vegetation changes at Stordalen indicate that both the productivity and the THC emissions increased between 1970 and 2000. Considering the GWP(100) of CH4, the net radiative forcing on climate increased 21% over the same time. In conclusion, reduced C compounds in these environments have high importance for both the annual C balance and climate. Article in Journal/Newspaper Arctic Eriophorum Northern Sweden palsa permafrost Subarctic Lund University Publications (LUP) Arctic Stordalen ENVELOPE(7.337,7.337,62.510,62.510) |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Physical Geography |
spellingShingle |
Physical Geography Backstrand, K. Crill, P. M. Jackowicz-Korczynski, Marcin Mastepanov, Mikhail Christensen, T. R. Bastviken, D. Annual carbon gas budget for a subarctic peatland, Northern Sweden |
topic_facet |
Physical Geography |
description |
Temperatures in the Arctic regions are rising, thawing permafrost and exposing previously stable soil organic carbon (OC) to decomposition. This can result in northern latitude soils, which have accumulated large amounts of OC potentially shifting from atmospheric C sinks to C sources with positive feedback on climate warming. In this paper, we estimate the annual net C gas balance (NCB) of the subarctic mire Stordalen, based on automatic chamber measurements of CO2 and total hydrocarbon (THC; CH4 and NMVOCs) exchange. We studied the dominant vegetation communities with different moisture and permafrost characteristics; a dry Palsa underlain by permafrost, an intermediate thaw site with Sphagnum spp. and a wet site with Eriophorum spp. where the soil thaws completely. Whole year accumulated fluxes of CO2 were estimated to 29.7, -35.3 and -34.9 gC m(-2) respectively for the Palsa, Sphagnum and Eriophorum sites (positive flux indicates an addition of C to the atmospheric pool). The corresponding annual THC emissions were 0.5, 6.2 and 31.8 gC m(-2) for the same sites. Therefore, the NCB for each of the sites was 30.2, -29.1 and -3.1 gC m(-2) respectively for the Palsa, Sphagnum and Eriophorum site. On average, the whole mire was a CO2 sink of 2.6 gC m(-2) and a THC source of 6.4 gC m(-2) over a year. Consequently, the mire was a net source of C to the atmosphere by 3.9 gC m(-2) (based on area weighted estimates for each of the three plant communities). Early and late snow season efflux of CO2 and THC emphasize the importance of winter measurements for complete annual C budgets. Decadal vegetation changes at Stordalen indicate that both the productivity and the THC emissions increased between 1970 and 2000. Considering the GWP(100) of CH4, the net radiative forcing on climate increased 21% over the same time. In conclusion, reduced C compounds in these environments have high importance for both the annual C balance and climate. |
format |
Article in Journal/Newspaper |
author |
Backstrand, K. Crill, P. M. Jackowicz-Korczynski, Marcin Mastepanov, Mikhail Christensen, T. R. Bastviken, D. |
author_facet |
Backstrand, K. Crill, P. M. Jackowicz-Korczynski, Marcin Mastepanov, Mikhail Christensen, T. R. Bastviken, D. |
author_sort |
Backstrand, K. |
title |
Annual carbon gas budget for a subarctic peatland, Northern Sweden |
title_short |
Annual carbon gas budget for a subarctic peatland, Northern Sweden |
title_full |
Annual carbon gas budget for a subarctic peatland, Northern Sweden |
title_fullStr |
Annual carbon gas budget for a subarctic peatland, Northern Sweden |
title_full_unstemmed |
Annual carbon gas budget for a subarctic peatland, Northern Sweden |
title_sort |
annual carbon gas budget for a subarctic peatland, northern sweden |
publisher |
Copernicus GmbH |
publishDate |
2010 |
url |
https://lup.lub.lu.se/record/1571167 |
long_lat |
ENVELOPE(7.337,7.337,62.510,62.510) |
geographic |
Arctic Stordalen |
geographic_facet |
Arctic Stordalen |
genre |
Arctic Eriophorum Northern Sweden palsa permafrost Subarctic |
genre_facet |
Arctic Eriophorum Northern Sweden palsa permafrost Subarctic |
op_source |
Biogeosciences; 7(1), pp 95-108 (2010) ISSN: 1726-4189 |
op_relation |
https://lup.lub.lu.se/record/1571167 wos:000274058100008 scopus:75749098140 |
_version_ |
1766344868084318208 |