Evaluation of existing ecosystem models with regard to ocean acidification
Although the carbonate chemistry and physical aspects of ocean acidification are well constrained, its biological effects are not fully understood. Experimental research has shown large variability in responses to increased atmospheric CO2 input into the ocean, ranging from positive to zero and nega...
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2011
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Online Access: | https://pure.knaw.nl/portal/en/publications/2cd4bd12-9209-4108-ae12-413e34ef1e85 https://hdl.handle.net/20.500.11755/2cd4bd12-9209-4108-ae12-413e34ef1e85 https://pure.knaw.nl/ws/files/474738/EPOCA-Poster-VanEngeland.pdf |
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KNAW: Research Explorer (Royal Netherlands Academy of Arts and Sciences) |
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English |
description |
Although the carbonate chemistry and physical aspects of ocean acidification are well constrained, its biological effects are not fully understood. Experimental research has shown large variability in responses to increased atmospheric CO2 input into the ocean, ranging from positive to zero and negative effects. Global models vary strongly in their results for particular parts of the global ocean, for instance in carbon export. This large inter-model variation and inconsistency with data reflect an insufficient understanding or representation of the biology, effectively reducing predictive capabilities. Sensitivity analyses and inter-model comparison allow for the identification of weaknesses in the parametrization and model structure. We investigate the performance of an existing mesocosm-based ecosystem model developed by Schartau and co-workers (Biogeosciences, 2007), which allows for a decoupling of carbon and nitrogen dynamics. Our in-depth analysis demonstrates to what extent the model can be calibrated to a given dataset of measurements. Local sensitivity analyses enable us to identify important parameters that deserve more attention in experimental work. An overall evaluation of the precision of the model output, given the available data is provided by a global sensitivity analysis. Using datasets from different mesocom studies, the overall robustness of the model structure and parametrization is evaluated. At a later stage, this mesocosm-based ecosystem model could be integrated with a global ocean circulation model. Although the carbonate chemistry and physical aspects of ocean acidification are well constrained, its biological effects are not fully understood. Experimental research has shown large variability in responses to increased atmospheric CO2 input into the ocean, ranging from positive to zero and negative effects. Global models vary strongly in their results for particular parts of the global ocean, for instance in carbon export. This large inter-model variation and inconsistency with data reflect an insufficient understanding or representation of the biology, effectively reducing predictive capabilities. Sensitivity analyses and inter-model comparison allow for the identification of weaknesses in the parametrization and model structure. We investigate the performance of an existing mesocosm-based ecosystem model developed by Schartau and co-workers (Biogeosciences, 2007), which allows for a decoupling of carbon and nitrogen dynamics. Our in-depth analysis demonstrates to what extent the model can be calibrated to a given dataset of measurements. Local sensitivity analyses enable us to identify important parameters that deserve more attention in experimental work. An overall evaluation of the precision of the model output, given the available data is provided by a global sensitivity analysis. Using datasets from different mesocom studies, the overall robustness of the model structure and parametrization is evaluated. At a later stage, this mesocosm-based ecosystem model could be integrated with a global ocean circulation model. |
format |
Conference Object |
author |
Van Engeland, T. Soetaert, K. Middelburg, J.J. Schartau, M. Hohn, S. Oschlies, A. |
spellingShingle |
Van Engeland, T. Soetaert, K. Middelburg, J.J. Schartau, M. Hohn, S. Oschlies, A. Evaluation of existing ecosystem models with regard to ocean acidification |
author_facet |
Van Engeland, T. Soetaert, K. Middelburg, J.J. Schartau, M. Hohn, S. Oschlies, A. |
author_sort |
Van Engeland, T. |
title |
Evaluation of existing ecosystem models with regard to ocean acidification |
title_short |
Evaluation of existing ecosystem models with regard to ocean acidification |
title_full |
Evaluation of existing ecosystem models with regard to ocean acidification |
title_fullStr |
Evaluation of existing ecosystem models with regard to ocean acidification |
title_full_unstemmed |
Evaluation of existing ecosystem models with regard to ocean acidification |
title_sort |
evaluation of existing ecosystem models with regard to ocean acidification |
publishDate |
2011 |
url |
https://pure.knaw.nl/portal/en/publications/2cd4bd12-9209-4108-ae12-413e34ef1e85 https://hdl.handle.net/20.500.11755/2cd4bd12-9209-4108-ae12-413e34ef1e85 https://pure.knaw.nl/ws/files/474738/EPOCA-Poster-VanEngeland.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Van Engeland , T , Soetaert , K , Middelburg , J J , Schartau , M , Hohn , S & Oschlies , A 2011 , ' Evaluation of existing ecosystem models with regard to ocean acidification ' , Paper presented at Annual meeting EPOCA, October, Bremerhaven , 27/09/2010 . |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/20.500.11755/2cd4bd12-9209-4108-ae12-413e34ef1e85 |
_version_ |
1766157795382525952 |
spelling |
ftknawnlpublic:oai:pure.knaw.nl:publications/2cd4bd12-9209-4108-ae12-413e34ef1e85 2023-05-15T17:50:52+02:00 Evaluation of existing ecosystem models with regard to ocean acidification Van Engeland, T. Soetaert, K. Middelburg, J.J. Schartau, M. Hohn, S. Oschlies, A. 2011 application/pdf https://pure.knaw.nl/portal/en/publications/2cd4bd12-9209-4108-ae12-413e34ef1e85 https://hdl.handle.net/20.500.11755/2cd4bd12-9209-4108-ae12-413e34ef1e85 https://pure.knaw.nl/ws/files/474738/EPOCA-Poster-VanEngeland.pdf eng eng info:eu-repo/semantics/openAccess Van Engeland , T , Soetaert , K , Middelburg , J J , Schartau , M , Hohn , S & Oschlies , A 2011 , ' Evaluation of existing ecosystem models with regard to ocean acidification ' , Paper presented at Annual meeting EPOCA, October, Bremerhaven , 27/09/2010 . conferenceObject 2011 ftknawnlpublic https://doi.org/20.500.11755/2cd4bd12-9209-4108-ae12-413e34ef1e85 2022-01-03T13:57:27Z Although the carbonate chemistry and physical aspects of ocean acidification are well constrained, its biological effects are not fully understood. Experimental research has shown large variability in responses to increased atmospheric CO2 input into the ocean, ranging from positive to zero and negative effects. Global models vary strongly in their results for particular parts of the global ocean, for instance in carbon export. This large inter-model variation and inconsistency with data reflect an insufficient understanding or representation of the biology, effectively reducing predictive capabilities. Sensitivity analyses and inter-model comparison allow for the identification of weaknesses in the parametrization and model structure. We investigate the performance of an existing mesocosm-based ecosystem model developed by Schartau and co-workers (Biogeosciences, 2007), which allows for a decoupling of carbon and nitrogen dynamics. Our in-depth analysis demonstrates to what extent the model can be calibrated to a given dataset of measurements. Local sensitivity analyses enable us to identify important parameters that deserve more attention in experimental work. An overall evaluation of the precision of the model output, given the available data is provided by a global sensitivity analysis. Using datasets from different mesocom studies, the overall robustness of the model structure and parametrization is evaluated. At a later stage, this mesocosm-based ecosystem model could be integrated with a global ocean circulation model. Although the carbonate chemistry and physical aspects of ocean acidification are well constrained, its biological effects are not fully understood. Experimental research has shown large variability in responses to increased atmospheric CO2 input into the ocean, ranging from positive to zero and negative effects. Global models vary strongly in their results for particular parts of the global ocean, for instance in carbon export. This large inter-model variation and inconsistency with data reflect an insufficient understanding or representation of the biology, effectively reducing predictive capabilities. Sensitivity analyses and inter-model comparison allow for the identification of weaknesses in the parametrization and model structure. We investigate the performance of an existing mesocosm-based ecosystem model developed by Schartau and co-workers (Biogeosciences, 2007), which allows for a decoupling of carbon and nitrogen dynamics. Our in-depth analysis demonstrates to what extent the model can be calibrated to a given dataset of measurements. Local sensitivity analyses enable us to identify important parameters that deserve more attention in experimental work. An overall evaluation of the precision of the model output, given the available data is provided by a global sensitivity analysis. Using datasets from different mesocom studies, the overall robustness of the model structure and parametrization is evaluated. At a later stage, this mesocosm-based ecosystem model could be integrated with a global ocean circulation model. Conference Object Ocean acidification KNAW: Research Explorer (Royal Netherlands Academy of Arts and Sciences) |