3D ecosystem modelling in the North Atlantic: relative impacts of physical and biological parameterizations
A simple ecosystem model is coupled to a 3-dimensional general circulation model for the North Atlantic. The physical model is based on the Los Alamos Parallel Ocean Program (POP) and forced by climatological monthly mean data. Four biological components(phytoplankton, zooplankton, nutrients and det...
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Online Access: | https://epic.awi.de/id/eprint/11661/ https://epic.awi.de/id/eprint/11661/1/Los2004d.pdf https://doi.org/10.1016/j.jmarsys.2005.09.011 https://hdl.handle.net/10013/epic.22108 https://hdl.handle.net/10013/epic.22108.d001 |
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ftawi:oai:epic.awi.de:11661 2023-09-05T13:21:29+02:00 3D ecosystem modelling in the North Atlantic: relative impacts of physical and biological parameterizations Loza, Svetlana Vezina, A. Wright, D. Lu, Y. Thompson, K. Dowd, M. 2006 application/pdf https://epic.awi.de/id/eprint/11661/ https://epic.awi.de/id/eprint/11661/1/Los2004d.pdf https://doi.org/10.1016/j.jmarsys.2005.09.011 https://hdl.handle.net/10013/epic.22108 https://hdl.handle.net/10013/epic.22108.d001 unknown https://epic.awi.de/id/eprint/11661/1/Los2004d.pdf https://hdl.handle.net/10013/epic.22108.d001 Loza, S. orcid:0000-0003-2153-1954 , Vezina, A. , Wright, D. , Lu, Y. , Thompson, K. and Dowd, M. (2006) 3D ecosystem modelling in the North Atlantic: relative impacts of physical and biological parameterizations , Journal of marine systems, 61 (3), pp. 230-245 . doi:10.1016/j.jmarsys.2005.09.011 <https://doi.org/10.1016/j.jmarsys.2005.09.011> , hdl:10013/epic.22108 EPIC3Journal of marine systems, 61(3), pp. 230-245 Article isiRev 2006 ftawi https://doi.org/10.1016/j.jmarsys.2005.09.011 2023-08-22T19:49:29Z A simple ecosystem model is coupled to a 3-dimensional general circulation model for the North Atlantic. The physical model is based on the Los Alamos Parallel Ocean Program (POP) and forced by climatological monthly mean data. Four biological components(phytoplankton, zooplankton, nutrients and detritus) are incorporated into POP as additional tracers with biological sources and sinks. The model solutions, obtained with different physical and biological parameterizations are compared against monthly mean SeaWiFS colour data averaged over the period 1997-2003 and Levitus's climatological nitrate data. A reference model solution, with constant biological model parameters over the whole basin,underestimates both the average chlorophyll level and its regionalvariability at mid- to high-latitudes. Experiments with a different parameterization of heat and freshwater fluxes, which affects upper ocean mixing, indicate a strong impact of such parameterizations on nutrient supply to the surface layer at high latitudes, but with little impact on simulated chlorophyll. Other experiments where advection of the biological tracers is turned off show basically the same result: strong impact on regional nutrient patterns but a negligible impact on phytoplankton patterns. Only model runs with spatially variable biological parameters, obtained from a previouszero-dimensional ecosystem model calibration on CZCS ocean colour data, could reproduce regional scale patterns in the SeaWiFS imagery. We hypothesize that some of these patterns can be linked to coccolithophore blooms in areas influenced by the N. Atlantic Drift during summer and to effects of temperature on plankton loss ratesduring spring. Future work should focus on identifying the main factors responsible for these spatial patterns and developing the ecosystem models that can capture them. Article in Journal/Newspaper North Atlantic Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Journal of Marine Systems 61 3-4 230 245 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
A simple ecosystem model is coupled to a 3-dimensional general circulation model for the North Atlantic. The physical model is based on the Los Alamos Parallel Ocean Program (POP) and forced by climatological monthly mean data. Four biological components(phytoplankton, zooplankton, nutrients and detritus) are incorporated into POP as additional tracers with biological sources and sinks. The model solutions, obtained with different physical and biological parameterizations are compared against monthly mean SeaWiFS colour data averaged over the period 1997-2003 and Levitus's climatological nitrate data. A reference model solution, with constant biological model parameters over the whole basin,underestimates both the average chlorophyll level and its regionalvariability at mid- to high-latitudes. Experiments with a different parameterization of heat and freshwater fluxes, which affects upper ocean mixing, indicate a strong impact of such parameterizations on nutrient supply to the surface layer at high latitudes, but with little impact on simulated chlorophyll. Other experiments where advection of the biological tracers is turned off show basically the same result: strong impact on regional nutrient patterns but a negligible impact on phytoplankton patterns. Only model runs with spatially variable biological parameters, obtained from a previouszero-dimensional ecosystem model calibration on CZCS ocean colour data, could reproduce regional scale patterns in the SeaWiFS imagery. We hypothesize that some of these patterns can be linked to coccolithophore blooms in areas influenced by the N. Atlantic Drift during summer and to effects of temperature on plankton loss ratesduring spring. Future work should focus on identifying the main factors responsible for these spatial patterns and developing the ecosystem models that can capture them. |
format |
Article in Journal/Newspaper |
author |
Loza, Svetlana Vezina, A. Wright, D. Lu, Y. Thompson, K. Dowd, M. |
spellingShingle |
Loza, Svetlana Vezina, A. Wright, D. Lu, Y. Thompson, K. Dowd, M. 3D ecosystem modelling in the North Atlantic: relative impacts of physical and biological parameterizations |
author_facet |
Loza, Svetlana Vezina, A. Wright, D. Lu, Y. Thompson, K. Dowd, M. |
author_sort |
Loza, Svetlana |
title |
3D ecosystem modelling in the North Atlantic: relative impacts of physical and biological parameterizations |
title_short |
3D ecosystem modelling in the North Atlantic: relative impacts of physical and biological parameterizations |
title_full |
3D ecosystem modelling in the North Atlantic: relative impacts of physical and biological parameterizations |
title_fullStr |
3D ecosystem modelling in the North Atlantic: relative impacts of physical and biological parameterizations |
title_full_unstemmed |
3D ecosystem modelling in the North Atlantic: relative impacts of physical and biological parameterizations |
title_sort |
3d ecosystem modelling in the north atlantic: relative impacts of physical and biological parameterizations |
publishDate |
2006 |
url |
https://epic.awi.de/id/eprint/11661/ https://epic.awi.de/id/eprint/11661/1/Los2004d.pdf https://doi.org/10.1016/j.jmarsys.2005.09.011 https://hdl.handle.net/10013/epic.22108 https://hdl.handle.net/10013/epic.22108.d001 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
EPIC3Journal of marine systems, 61(3), pp. 230-245 |
op_relation |
https://epic.awi.de/id/eprint/11661/1/Los2004d.pdf https://hdl.handle.net/10013/epic.22108.d001 Loza, S. orcid:0000-0003-2153-1954 , Vezina, A. , Wright, D. , Lu, Y. , Thompson, K. and Dowd, M. (2006) 3D ecosystem modelling in the North Atlantic: relative impacts of physical and biological parameterizations , Journal of marine systems, 61 (3), pp. 230-245 . doi:10.1016/j.jmarsys.2005.09.011 <https://doi.org/10.1016/j.jmarsys.2005.09.011> , hdl:10013/epic.22108 |
op_doi |
https://doi.org/10.1016/j.jmarsys.2005.09.011 |
container_title |
Journal of Marine Systems |
container_volume |
61 |
container_issue |
3-4 |
container_start_page |
230 |
op_container_end_page |
245 |
_version_ |
1776202081449803776 |