A seasonal three-dimensional ecosystem model of nitrogen cycling in the North Atlantic Euphotic Zone
A seven-component upper ocean ecosystem model of nitrogen cycling calibrated with observations at Bermuda Station “S” has been coupled to a three-dimensional seasonal general circulation model (GCM) of the North Atlantic ocean. The aim of this project is to improve our understanding of the role of u...
Published in: | Global Biogeochemical Cycles |
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2012
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ftoceanrep:oai:oceanrep.geomar.de:31693 2023-05-15T17:30:55+02:00 A seasonal three-dimensional ecosystem model of nitrogen cycling in the North Atlantic Euphotic Zone Sarmiento, J. L. Slater, R. D. Fasham, M. J. R. Ducklow, H. W. Toggweiler, J. R. Evans, G. T. 2012 text https://oceanrep.geomar.de/id/eprint/31693/ https://oceanrep.geomar.de/id/eprint/31693/1/Sarmiento,J.L.pdf https://doi.org/10.1029/93GB00375 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/31693/1/Sarmiento,J.L.pdf Sarmiento, J. L., Slater, R. D., Fasham, M. J. R., Ducklow, H. W., Toggweiler, J. R. and Evans, G. T. (2012) A seasonal three-dimensional ecosystem model of nitrogen cycling in the North Atlantic Euphotic Zone. Global Biogeochemical Cycles, 7 (2). pp. 417-450. DOI 10.1029/93GB00375 <https://doi.org/10.1029/93GB00375>. doi:10.1029/93GB00375 cc_by_3.0 Article PeerReviewed 2012 ftoceanrep https://doi.org/10.1029/93GB00375 2023-04-07T15:24:10Z A seven-component upper ocean ecosystem model of nitrogen cycling calibrated with observations at Bermuda Station “S” has been coupled to a three-dimensional seasonal general circulation model (GCM) of the North Atlantic ocean. The aim of this project is to improve our understanding of the role of upper ocean biological processes in controlling surface chemical distributions, and to develop approaches for assimilating large data sets relevant to this problem. A comparison of model predicted chlorophyll with satellite coastal zone color scanner observations shows that the ecosystem model is capable of responding realistically to a variety of physical forcing environments. Most of the discrepancies identified are due to problems with the GCM model. The new production predicted by the model is equivalent to 2 to 2.8 mol m−2 yr−1 of carbon uptake, or 8 to 12 GtC/yr on a global scale. The southern half of the subtropical gyre is the only major region of the model with almost complete surface nitrate removal (nitrate<0.1 mmol m−3). Despite this, almost the entire model is nitrate limited in the sense that any addition of nitrate supply would go predominantly into photosynthesis. The only exceptions are some coastal upwelling regions and the high latitudes during winter, where nitrate goes as high as ∼10 mmol m−3. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Global Biogeochemical Cycles 7 2 417 450 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
A seven-component upper ocean ecosystem model of nitrogen cycling calibrated with observations at Bermuda Station “S” has been coupled to a three-dimensional seasonal general circulation model (GCM) of the North Atlantic ocean. The aim of this project is to improve our understanding of the role of upper ocean biological processes in controlling surface chemical distributions, and to develop approaches for assimilating large data sets relevant to this problem. A comparison of model predicted chlorophyll with satellite coastal zone color scanner observations shows that the ecosystem model is capable of responding realistically to a variety of physical forcing environments. Most of the discrepancies identified are due to problems with the GCM model. The new production predicted by the model is equivalent to 2 to 2.8 mol m−2 yr−1 of carbon uptake, or 8 to 12 GtC/yr on a global scale. The southern half of the subtropical gyre is the only major region of the model with almost complete surface nitrate removal (nitrate<0.1 mmol m−3). Despite this, almost the entire model is nitrate limited in the sense that any addition of nitrate supply would go predominantly into photosynthesis. The only exceptions are some coastal upwelling regions and the high latitudes during winter, where nitrate goes as high as ∼10 mmol m−3. |
format |
Article in Journal/Newspaper |
author |
Sarmiento, J. L. Slater, R. D. Fasham, M. J. R. Ducklow, H. W. Toggweiler, J. R. Evans, G. T. |
spellingShingle |
Sarmiento, J. L. Slater, R. D. Fasham, M. J. R. Ducklow, H. W. Toggweiler, J. R. Evans, G. T. A seasonal three-dimensional ecosystem model of nitrogen cycling in the North Atlantic Euphotic Zone |
author_facet |
Sarmiento, J. L. Slater, R. D. Fasham, M. J. R. Ducklow, H. W. Toggweiler, J. R. Evans, G. T. |
author_sort |
Sarmiento, J. L. |
title |
A seasonal three-dimensional ecosystem model of nitrogen cycling in the North Atlantic Euphotic Zone |
title_short |
A seasonal three-dimensional ecosystem model of nitrogen cycling in the North Atlantic Euphotic Zone |
title_full |
A seasonal three-dimensional ecosystem model of nitrogen cycling in the North Atlantic Euphotic Zone |
title_fullStr |
A seasonal three-dimensional ecosystem model of nitrogen cycling in the North Atlantic Euphotic Zone |
title_full_unstemmed |
A seasonal three-dimensional ecosystem model of nitrogen cycling in the North Atlantic Euphotic Zone |
title_sort |
seasonal three-dimensional ecosystem model of nitrogen cycling in the north atlantic euphotic zone |
publisher |
AGU (American Geophysical Union) |
publishDate |
2012 |
url |
https://oceanrep.geomar.de/id/eprint/31693/ https://oceanrep.geomar.de/id/eprint/31693/1/Sarmiento,J.L.pdf https://doi.org/10.1029/93GB00375 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/31693/1/Sarmiento,J.L.pdf Sarmiento, J. L., Slater, R. D., Fasham, M. J. R., Ducklow, H. W., Toggweiler, J. R. and Evans, G. T. (2012) A seasonal three-dimensional ecosystem model of nitrogen cycling in the North Atlantic Euphotic Zone. Global Biogeochemical Cycles, 7 (2). pp. 417-450. DOI 10.1029/93GB00375 <https://doi.org/10.1029/93GB00375>. doi:10.1029/93GB00375 |
op_rights |
cc_by_3.0 |
op_doi |
https://doi.org/10.1029/93GB00375 |
container_title |
Global Biogeochemical Cycles |
container_volume |
7 |
container_issue |
2 |
container_start_page |
417 |
op_container_end_page |
450 |
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1766128049530601472 |