Modeling atmospheric CO 2 concentration profiles and fluxes above sloping terrain at a boreal site
International audience 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 meas...
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ftccsdartic:oai:HAL:hal-00295835v1 2023-11-12T04:26:59+01:00 Modeling atmospheric CO 2 concentration profiles and fluxes above sloping terrain at a boreal site Aalto, T. Hatakka, J. Karstens, U. Aurela, M. Thum, T. Lohila, A. Finnish Meteorological Institute (FMI) Max Planck Institute for Biogeochemistry (MPI-BGC) Max-Planck-Gesellschaft 2006-02-03 https://hal.science/hal-00295835 https://hal.science/hal-00295835/document https://hal.science/hal-00295835/file/acp-6-303-2006.pdf en eng HAL CCSD European Geosciences Union hal-00295835 https://hal.science/hal-00295835 https://hal.science/hal-00295835/document https://hal.science/hal-00295835/file/acp-6-303-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00295835 Atmospheric Chemistry and Physics, 2006, 6 (2), pp.303-314 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2006 ftccsdartic 2023-10-21T23:17:25Z International audience 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Aalto, T. Hatakka, J. Karstens, U. Aurela, M. Thum, T. Lohila, A. Modeling atmospheric CO 2 concentration profiles and fluxes above sloping terrain at a boreal site |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience 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. |
author2 |
Finnish Meteorological Institute (FMI) Max Planck Institute for Biogeochemistry (MPI-BGC) Max-Planck-Gesellschaft |
format |
Article in Journal/Newspaper |
author |
Aalto, T. Hatakka, J. Karstens, U. Aurela, M. Thum, T. Lohila, A. |
author_facet |
Aalto, T. Hatakka, J. Karstens, U. Aurela, M. Thum, T. Lohila, A. |
author_sort |
Aalto, T. |
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 |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00295835 https://hal.science/hal-00295835/document https://hal.science/hal-00295835/file/acp-6-303-2006.pdf |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00295835 Atmospheric Chemistry and Physics, 2006, 6 (2), pp.303-314 |
op_relation |
hal-00295835 https://hal.science/hal-00295835 https://hal.science/hal-00295835/document https://hal.science/hal-00295835/file/acp-6-303-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782340759346741248 |