Modelling CH4 emissions from arctic wetlands: effects of hydrological parameterization
This study compares the CH4 fluxes from two arctic wetland sites of different annual temperatures during 2004 to 2006. The PEATLAND-VU model was used to simulate the emissions. The CH4 module of PEATLAND-VU is based on the Walter-Heimann model. The first site is located in northeast Siberia, Indigir...
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ftulundlup:oai:lup.lub.lu.se:24d3c02f-20c0-49c9-b118-cde857ba3976 2023-05-15T12:59:55+02:00 Modelling CH4 emissions from arctic wetlands: effects of hydrological parameterization Petrescu, A M R van Huissteden, J Jackowicz-Korczynski, Marcin Yurova, Alla Christensen, Torben Crill, P M Backstrand, K Maximov, T C 2008 https://lup.lub.lu.se/record/1198849 eng eng Copernicus GmbH https://lup.lub.lu.se/record/1198849 wos:000252859100008 scopus:38849155737 Biogeosciences; 5(1), pp 111-121 (2008) ISSN: 1726-4189 Physical Geography contributiontojournal/article info:eu-repo/semantics/article text 2008 ftulundlup 2023-02-01T23:32:55Z This study compares the CH4 fluxes from two arctic wetland sites of different annual temperatures during 2004 to 2006. The PEATLAND-VU model was used to simulate the emissions. The CH4 module of PEATLAND-VU is based on the Walter-Heimann model. The first site is located in northeast Siberia, Indigirka lowlands, Kytalyk reserve (70 degrees N, 147 degrees E) in a continuous permafrost region with mean annual temperatures of -14.3 degrees C. The other site is Stordalen mire in the eastern part of Lake Tornetrask (68 degrees N, 19 degrees E) ten kilometres east of Abisko, northern Sweden. It is located in a discontinuous permafrost region. Stordalen has a sub arctic climate with a mean annual temperature of -0.7 degrees C. Model input consisted of observed temperature, precipitation and snow cover data. In all cases, modelled CH4 emissions show a direct correlation between variations in water table and soil temperature variations. The differences in CH4 emissions between the two sites are caused by different climate, hydrology, soil physical properties, vegetation type and NPP. For Kytalyk the simulated CH4 fluxes show similar trends during the growing season, having average values for 2004 to 2006 between 1.29-2.09 mg CH4 m(-2) hr(-1). At Stordalen the simulated fluxes show a slightly lower average value for the same years (3.52 mg CH4 m(-2) hr(-1)) than the observed 4.7 mg CH4 m(-2) hr(-1). The effect of the longer growing season at Stordalen is simulated correctly. Our study shows that modelling of arctic CH4 fluxes is improved by adding a relatively simple hydrological model that simulates the water table position from generic weather data. Our results support the generalization in literature that CH4 fluxes in northern wetland are regulated more tightly by water table than temperature. Furthermore, parameter uncertainty at site level in wetland CH4 process models is an important factor in large scale modelling of CH4 fluxes. Article in Journal/Newspaper Abisko Arctic Northern Sweden permafrost Siberia Lund University Publications (LUP) Arctic Abisko ENVELOPE(18.829,18.829,68.349,68.349) Indigirka ENVELOPE(149.609,149.609,70.929,70.929) 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 Petrescu, A M R van Huissteden, J Jackowicz-Korczynski, Marcin Yurova, Alla Christensen, Torben Crill, P M Backstrand, K Maximov, T C Modelling CH4 emissions from arctic wetlands: effects of hydrological parameterization |
topic_facet |
Physical Geography |
description |
This study compares the CH4 fluxes from two arctic wetland sites of different annual temperatures during 2004 to 2006. The PEATLAND-VU model was used to simulate the emissions. The CH4 module of PEATLAND-VU is based on the Walter-Heimann model. The first site is located in northeast Siberia, Indigirka lowlands, Kytalyk reserve (70 degrees N, 147 degrees E) in a continuous permafrost region with mean annual temperatures of -14.3 degrees C. The other site is Stordalen mire in the eastern part of Lake Tornetrask (68 degrees N, 19 degrees E) ten kilometres east of Abisko, northern Sweden. It is located in a discontinuous permafrost region. Stordalen has a sub arctic climate with a mean annual temperature of -0.7 degrees C. Model input consisted of observed temperature, precipitation and snow cover data. In all cases, modelled CH4 emissions show a direct correlation between variations in water table and soil temperature variations. The differences in CH4 emissions between the two sites are caused by different climate, hydrology, soil physical properties, vegetation type and NPP. For Kytalyk the simulated CH4 fluxes show similar trends during the growing season, having average values for 2004 to 2006 between 1.29-2.09 mg CH4 m(-2) hr(-1). At Stordalen the simulated fluxes show a slightly lower average value for the same years (3.52 mg CH4 m(-2) hr(-1)) than the observed 4.7 mg CH4 m(-2) hr(-1). The effect of the longer growing season at Stordalen is simulated correctly. Our study shows that modelling of arctic CH4 fluxes is improved by adding a relatively simple hydrological model that simulates the water table position from generic weather data. Our results support the generalization in literature that CH4 fluxes in northern wetland are regulated more tightly by water table than temperature. Furthermore, parameter uncertainty at site level in wetland CH4 process models is an important factor in large scale modelling of CH4 fluxes. |
format |
Article in Journal/Newspaper |
author |
Petrescu, A M R van Huissteden, J Jackowicz-Korczynski, Marcin Yurova, Alla Christensen, Torben Crill, P M Backstrand, K Maximov, T C |
author_facet |
Petrescu, A M R van Huissteden, J Jackowicz-Korczynski, Marcin Yurova, Alla Christensen, Torben Crill, P M Backstrand, K Maximov, T C |
author_sort |
Petrescu, A M R |
title |
Modelling CH4 emissions from arctic wetlands: effects of hydrological parameterization |
title_short |
Modelling CH4 emissions from arctic wetlands: effects of hydrological parameterization |
title_full |
Modelling CH4 emissions from arctic wetlands: effects of hydrological parameterization |
title_fullStr |
Modelling CH4 emissions from arctic wetlands: effects of hydrological parameterization |
title_full_unstemmed |
Modelling CH4 emissions from arctic wetlands: effects of hydrological parameterization |
title_sort |
modelling ch4 emissions from arctic wetlands: effects of hydrological parameterization |
publisher |
Copernicus GmbH |
publishDate |
2008 |
url |
https://lup.lub.lu.se/record/1198849 |
long_lat |
ENVELOPE(18.829,18.829,68.349,68.349) ENVELOPE(149.609,149.609,70.929,70.929) ENVELOPE(7.337,7.337,62.510,62.510) |
geographic |
Arctic Abisko Indigirka Stordalen |
geographic_facet |
Arctic Abisko Indigirka Stordalen |
genre |
Abisko Arctic Northern Sweden permafrost Siberia |
genre_facet |
Abisko Arctic Northern Sweden permafrost Siberia |
op_source |
Biogeosciences; 5(1), pp 111-121 (2008) ISSN: 1726-4189 |
op_relation |
https://lup.lub.lu.se/record/1198849 wos:000252859100008 scopus:38849155737 |
_version_ |
1766132259676487680 |