, Air-sea exchange of nitrogen and carbon over the Northwest-European Continental Shelf
The ecosystem model ECOHAM3 we developped simulates the marine carbon, nitrogen and oxygen cycle.We used the model to evaluate especially the fluxes between the shelf and the atmosphere, i.e. the absorption and release of CO2, the aeolian input of bioavailable nitrogen compounds and the release of m...
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ftorbi:oai:orbi.ulg.ac.be:2268/246510 2024-04-21T08:07:39+00:00 , Air-sea exchange of nitrogen and carbon over the Northwest-European Continental Shelf Kühn, W Pätsch, J Borges, Alberto Bozec, Y Schiettecatte, LS Thomas, H 2006 https://orbi.uliege.be/handle/2268/246510 https://orbi.uliege.be/bitstream/2268/246510/1/EGU06-J-08071-1.pdf en eng https://orbi.uliege.be/handle/2268/246510 info:hdl:2268/246510 https://orbi.uliege.be/bitstream/2268/246510/1/EGU06-J-08071-1.pdf open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess EGU General Assembly 2006, Vienna, Austria [AT], 02-07 April 2006 Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie conference poster not in proceedings http://purl.org/coar/resource_type/c_18co info:eu-repo/semantics/conferencePoster 2006 ftorbi 2024-03-27T14:50:29Z The ecosystem model ECOHAM3 we developped simulates the marine carbon, nitrogen and oxygen cycle.We used the model to evaluate especially the fluxes between the shelf and the atmosphere, i.e. the absorption and release of CO2, the aeolian input of bioavailable nitrogen compounds and the release of molecular nitrogen due to benthic denitrification. The simulations were performed for the mid-nineties, a period with an extremely large variation of the NAO index with the consequence of very different meteorological conditions. Time series of daily riverine nitrogen and carbon loads were used, while for the atmospheric deposition of nitrate and ammonium only annual means from EMEP (European Monitoring and Evaluation Program) were available. According to our model results the Northwest European Shelf acts as a ‘continental shelf pump’, i.e. it effectively absorbs atmospheric CO2 (300 Gmol C yr−1 in the high-NAOI years 1994/95 and 560 Gmol C yr−1 in 1996 with the very low NAOI) and exports dissolved inorganic carbon into the neighbouring open North Atlantic. At the same time the shelf, especially the North Sea, gets a large amount of nitrogen via atmospheric deposition (27 Gmol N yr−1) as well as by river input (50-80 Gmol N yr−1) which is biologically used. A large part of the nitrogen the North Sea is supplied with, including a considerable advective net inflow of organic nitrogen, is released to the atmosphere as molecular nitrogen (about 70 Gmol N yr−1). In spite of this strong benthic denitrification the North Sea acts as net source of dissolved inorganic nitrogen for the North Atlantic; this is a consequence of the net heterotrophy of the North Sea. Conference Object North Atlantic University of Liège: ORBi (Open Repository and Bibliography) |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
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ftorbi |
language |
English |
topic |
Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie |
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Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie Kühn, W Pätsch, J Borges, Alberto Bozec, Y Schiettecatte, LS Thomas, H , Air-sea exchange of nitrogen and carbon over the Northwest-European Continental Shelf |
topic_facet |
Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie |
description |
The ecosystem model ECOHAM3 we developped simulates the marine carbon, nitrogen and oxygen cycle.We used the model to evaluate especially the fluxes between the shelf and the atmosphere, i.e. the absorption and release of CO2, the aeolian input of bioavailable nitrogen compounds and the release of molecular nitrogen due to benthic denitrification. The simulations were performed for the mid-nineties, a period with an extremely large variation of the NAO index with the consequence of very different meteorological conditions. Time series of daily riverine nitrogen and carbon loads were used, while for the atmospheric deposition of nitrate and ammonium only annual means from EMEP (European Monitoring and Evaluation Program) were available. According to our model results the Northwest European Shelf acts as a ‘continental shelf pump’, i.e. it effectively absorbs atmospheric CO2 (300 Gmol C yr−1 in the high-NAOI years 1994/95 and 560 Gmol C yr−1 in 1996 with the very low NAOI) and exports dissolved inorganic carbon into the neighbouring open North Atlantic. At the same time the shelf, especially the North Sea, gets a large amount of nitrogen via atmospheric deposition (27 Gmol N yr−1) as well as by river input (50-80 Gmol N yr−1) which is biologically used. A large part of the nitrogen the North Sea is supplied with, including a considerable advective net inflow of organic nitrogen, is released to the atmosphere as molecular nitrogen (about 70 Gmol N yr−1). In spite of this strong benthic denitrification the North Sea acts as net source of dissolved inorganic nitrogen for the North Atlantic; this is a consequence of the net heterotrophy of the North Sea. |
format |
Conference Object |
author |
Kühn, W Pätsch, J Borges, Alberto Bozec, Y Schiettecatte, LS Thomas, H |
author_facet |
Kühn, W Pätsch, J Borges, Alberto Bozec, Y Schiettecatte, LS Thomas, H |
author_sort |
Kühn, W |
title |
, Air-sea exchange of nitrogen and carbon over the Northwest-European Continental Shelf |
title_short |
, Air-sea exchange of nitrogen and carbon over the Northwest-European Continental Shelf |
title_full |
, Air-sea exchange of nitrogen and carbon over the Northwest-European Continental Shelf |
title_fullStr |
, Air-sea exchange of nitrogen and carbon over the Northwest-European Continental Shelf |
title_full_unstemmed |
, Air-sea exchange of nitrogen and carbon over the Northwest-European Continental Shelf |
title_sort |
, air-sea exchange of nitrogen and carbon over the northwest-european continental shelf |
publishDate |
2006 |
url |
https://orbi.uliege.be/handle/2268/246510 https://orbi.uliege.be/bitstream/2268/246510/1/EGU06-J-08071-1.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
EGU General Assembly 2006, Vienna, Austria [AT], 02-07 April 2006 |
op_relation |
https://orbi.uliege.be/handle/2268/246510 info:hdl:2268/246510 https://orbi.uliege.be/bitstream/2268/246510/1/EGU06-J-08071-1.pdf |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
_version_ |
1796947639318609920 |