Primary production sensitivity to phytoplankton light attenuation parameter increases with transient forcing
Treatment of the underwater light field in ocean biogeochemical models has been attracting increasing interest, with some models moving towards more complex parameterisations. We conduct a simple sensitivity study of a typical, highly simplified parameterisation. In our study, we vary the phytoplank...
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Copernicus Publications (EGU)
2017
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Online Access: | https://oceanrep.geomar.de/id/eprint/36812/ https://oceanrep.geomar.de/id/eprint/36812/1/bg-14-4767-2017.pdf https://doi.org/10.5194/bg-14-4767-2017 |
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ftoceanrep:oai:oceanrep.geomar.de:36812 2023-05-15T18:25:30+02:00 Primary production sensitivity to phytoplankton light attenuation parameter increases with transient forcing Kvale, Karin Frances Meissner, Katrin J. 2017-10-25 text https://oceanrep.geomar.de/id/eprint/36812/ https://oceanrep.geomar.de/id/eprint/36812/1/bg-14-4767-2017.pdf https://doi.org/10.5194/bg-14-4767-2017 en eng Copernicus Publications (EGU) https://oceanrep.geomar.de/id/eprint/36812/1/bg-14-4767-2017.pdf Kvale, K. F. and Meissner, K. J. (2017) Primary production sensitivity to phytoplankton light attenuation parameter increases with transient forcing. Open Access Biogeosciences (BG), 14 . pp. 4767-4780. DOI 10.5194/bg-14-4767-2017 <https://doi.org/10.5194/bg-14-4767-2017>. doi:10.5194/bg-14-4767-2017 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2017 ftoceanrep https://doi.org/10.5194/bg-14-4767-2017 2023-04-07T15:31:27Z Treatment of the underwater light field in ocean biogeochemical models has been attracting increasing interest, with some models moving towards more complex parameterisations. We conduct a simple sensitivity study of a typical, highly simplified parameterisation. In our study, we vary the phytoplankton light attenuation parameter over a range constrained by data during both pre-industrial equilibrated and future climate scenario RCP8.5. In equilibrium, lower light attenuation parameters (weaker self-shading) shift net primary production (NPP) towards the high latitudes, while higher values of light attenuation (stronger shelf-shading) shift NPP towards the low latitudes. Climate forcing magnifies this relationship through changes in the distribution of nutrients both within and between ocean regions. Where and how NPP responds to climate forcing can determine the magnitude and sign of global NPP trends in this high CO2 future scenario. Ocean oxygen is particularly sensitive to parameter choice. Under higher CO2 concentrations, two simulations establish a strong biogeochemical feedback between the Southern Ocean and low-latitude Pacific that highlights the potential for regional teleconnection. Our simulations serve as a reminder that shifts in fundamental properties (e.g. light attenuation by phytoplankton) over deep time have the potential to alter global biogeochemistry. Article in Journal/Newspaper Southern Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Pacific Southern Ocean Biogeosciences 14 20 4767 4780 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Treatment of the underwater light field in ocean biogeochemical models has been attracting increasing interest, with some models moving towards more complex parameterisations. We conduct a simple sensitivity study of a typical, highly simplified parameterisation. In our study, we vary the phytoplankton light attenuation parameter over a range constrained by data during both pre-industrial equilibrated and future climate scenario RCP8.5. In equilibrium, lower light attenuation parameters (weaker self-shading) shift net primary production (NPP) towards the high latitudes, while higher values of light attenuation (stronger shelf-shading) shift NPP towards the low latitudes. Climate forcing magnifies this relationship through changes in the distribution of nutrients both within and between ocean regions. Where and how NPP responds to climate forcing can determine the magnitude and sign of global NPP trends in this high CO2 future scenario. Ocean oxygen is particularly sensitive to parameter choice. Under higher CO2 concentrations, two simulations establish a strong biogeochemical feedback between the Southern Ocean and low-latitude Pacific that highlights the potential for regional teleconnection. Our simulations serve as a reminder that shifts in fundamental properties (e.g. light attenuation by phytoplankton) over deep time have the potential to alter global biogeochemistry. |
format |
Article in Journal/Newspaper |
author |
Kvale, Karin Frances Meissner, Katrin J. |
spellingShingle |
Kvale, Karin Frances Meissner, Katrin J. Primary production sensitivity to phytoplankton light attenuation parameter increases with transient forcing |
author_facet |
Kvale, Karin Frances Meissner, Katrin J. |
author_sort |
Kvale, Karin Frances |
title |
Primary production sensitivity to phytoplankton light attenuation parameter increases with transient forcing |
title_short |
Primary production sensitivity to phytoplankton light attenuation parameter increases with transient forcing |
title_full |
Primary production sensitivity to phytoplankton light attenuation parameter increases with transient forcing |
title_fullStr |
Primary production sensitivity to phytoplankton light attenuation parameter increases with transient forcing |
title_full_unstemmed |
Primary production sensitivity to phytoplankton light attenuation parameter increases with transient forcing |
title_sort |
primary production sensitivity to phytoplankton light attenuation parameter increases with transient forcing |
publisher |
Copernicus Publications (EGU) |
publishDate |
2017 |
url |
https://oceanrep.geomar.de/id/eprint/36812/ https://oceanrep.geomar.de/id/eprint/36812/1/bg-14-4767-2017.pdf https://doi.org/10.5194/bg-14-4767-2017 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/36812/1/bg-14-4767-2017.pdf Kvale, K. F. and Meissner, K. J. (2017) Primary production sensitivity to phytoplankton light attenuation parameter increases with transient forcing. Open Access Biogeosciences (BG), 14 . pp. 4767-4780. DOI 10.5194/bg-14-4767-2017 <https://doi.org/10.5194/bg-14-4767-2017>. doi:10.5194/bg-14-4767-2017 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-14-4767-2017 |
container_title |
Biogeosciences |
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14 |
container_issue |
20 |
container_start_page |
4767 |
op_container_end_page |
4780 |
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1766207013562351616 |