Modeling atmospheric CO 2 concentration profiles and fluxes above sloping terrain at a boreal site
CO 2 fluxes and concentrations were simulated in the planetary boundary layer above subarctic hilly terrain using a three dimensional model. The model solves the transport equations in the local scale and includes a vegetation sub-model. A WMO/GAW background concentration measurement site and an eco...
Main Authors: | , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2006
|
Subjects: | |
Online Access: | https://doaj.org/article/21bb747395bf44fca57864d53d83fce4 |
id |
ftdoajarticles:oai:doaj.org/article:21bb747395bf44fca57864d53d83fce4 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:21bb747395bf44fca57864d53d83fce4 2023-05-15T18:28:30+02:00 Modeling atmospheric CO 2 concentration profiles and fluxes above sloping terrain at a boreal site T. Aalto J. Hatakka U. Karstens M. Aurela T. Thum A. Lohila 2006-01-01T00:00:00Z https://doaj.org/article/21bb747395bf44fca57864d53d83fce4 EN eng Copernicus Publications http://www.atmos-chem-phys.net/6/303/2006/acp-6-303-2006.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/21bb747395bf44fca57864d53d83fce4 Atmospheric Chemistry and Physics, Vol 6, Iss 2, Pp 303-314 (2006) Physics QC1-999 Chemistry QD1-999 article 2006 ftdoajarticles 2022-12-30T22:47:45Z CO 2 fluxes and concentrations were simulated in the planetary boundary layer above subarctic hilly terrain using a three dimensional model. The model solves the transport equations in the local scale and includes a vegetation sub-model. A WMO/GAW background concentration measurement site and an ecosystem flux measurement site are located inside the modeled region at a hilltop and above a mixed boreal forest, respectively. According to model results, the concentration measurement at the hill site was representative for continental background. However, this was not the case for the whole model domain. Concentration at few meters above active vegetation represented mainly local variation. Local variation became inseparable from the regional signal at about 60-100 m above ground. Flow over hills changed profiles of environmental variables and height of inversion layer, however CO 2 profiles were more affected by upwind land use than topography. The hill site was above boundary layer during night and inside boundary layer during daytime. The CO 2 input from model lateral boundaries dominated in both cases. Daily variation in the CO 2 assimilation rate was clearly seen in the CO 2 profiles. Concentration difference between the hill site and the forest site was about 5ppm during afternoon according to both model and measurements. The average modeled flux to the whole model region was about 40% of measured and modeled local flux at the forest site. Article in Journal/Newspaper Subarctic Directory of Open Access Journals: DOAJ Articles |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 T. Aalto J. Hatakka U. Karstens M. Aurela T. Thum A. Lohila Modeling atmospheric CO 2 concentration profiles and fluxes above sloping terrain at a boreal site |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
CO 2 fluxes and concentrations were simulated in the planetary boundary layer above subarctic hilly terrain using a three dimensional model. The model solves the transport equations in the local scale and includes a vegetation sub-model. A WMO/GAW background concentration measurement site and an ecosystem flux measurement site are located inside the modeled region at a hilltop and above a mixed boreal forest, respectively. According to model results, the concentration measurement at the hill site was representative for continental background. However, this was not the case for the whole model domain. Concentration at few meters above active vegetation represented mainly local variation. Local variation became inseparable from the regional signal at about 60-100 m above ground. Flow over hills changed profiles of environmental variables and height of inversion layer, however CO 2 profiles were more affected by upwind land use than topography. The hill site was above boundary layer during night and inside boundary layer during daytime. The CO 2 input from model lateral boundaries dominated in both cases. Daily variation in the CO 2 assimilation rate was clearly seen in the CO 2 profiles. Concentration difference between the hill site and the forest site was about 5ppm during afternoon according to both model and measurements. The average modeled flux to the whole model region was about 40% of measured and modeled local flux at the forest site. |
format |
Article in Journal/Newspaper |
author |
T. Aalto J. Hatakka U. Karstens M. Aurela T. Thum A. Lohila |
author_facet |
T. Aalto J. Hatakka U. Karstens M. Aurela T. Thum A. Lohila |
author_sort |
T. Aalto |
title |
Modeling atmospheric CO 2 concentration profiles and fluxes above sloping terrain at a boreal site |
title_short |
Modeling atmospheric CO 2 concentration profiles and fluxes above sloping terrain at a boreal site |
title_full |
Modeling atmospheric CO 2 concentration profiles and fluxes above sloping terrain at a boreal site |
title_fullStr |
Modeling atmospheric CO 2 concentration profiles and fluxes above sloping terrain at a boreal site |
title_full_unstemmed |
Modeling atmospheric CO 2 concentration profiles and fluxes above sloping terrain at a boreal site |
title_sort |
modeling atmospheric co 2 concentration profiles and fluxes above sloping terrain at a boreal site |
publisher |
Copernicus Publications |
publishDate |
2006 |
url |
https://doaj.org/article/21bb747395bf44fca57864d53d83fce4 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Atmospheric Chemistry and Physics, Vol 6, Iss 2, Pp 303-314 (2006) |
op_relation |
http://www.atmos-chem-phys.net/6/303/2006/acp-6-303-2006.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/21bb747395bf44fca57864d53d83fce4 |
_version_ |
1766211002687291392 |