The role of zooplankton for carbon export, nutrient recycling and phytoplankton bloom phenology in an ocean biogeochemical model
Marine zooplankton, i.e., heterotrophic marine plankton, serve as trophic links between primary producers and higher trophic levels, and as recyclers for nutrients and carbon in the pelagic ecosystem. In addition, they play a major role for the carbon export flux due to fecal pellet production and f...
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Universität Bremen
2022
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/6088 2023-05-15T18:18:50+02:00 The role of zooplankton for carbon export, nutrient recycling and phytoplankton bloom phenology in an ocean biogeochemical model Karakuş, Onur Hauck, Judith Le Quéré, Corinne 2022-07-20 application/pdf https://media.suub.uni-bremen.de/handle/elib/6088 https://doi.org/10.26092/elib/1670 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib60889 eng eng Universität Bremen Fachbereich 02: Biologie/Chemie (FB 02) https://media.suub.uni-bremen.de/handle/elib/6088 https://doi.org/10.26092/elib/1670 doi:10.26092/elib/1670 urn:nbn:de:gbv:46-elib60889 info:eu-repo/semantics/openAccess CC BY-SA 4.0 (Attribution-ShareAlike 4.0) https://creativecommons.org/licenses/by-sa/4.0/ CC-BY-SA biogeochemical modelling biogogical carbon pump zooplankton functional types 570 570 Life sciences biology ddc:570 Dissertation doctoralThesis 2022 ftsubbremen https://doi.org/10.26092/elib/1670 2022-11-09T07:10:27Z Marine zooplankton, i.e., heterotrophic marine plankton, serve as trophic links between primary producers and higher trophic levels, and as recyclers for nutrients and carbon in the pelagic ecosystem. In addition, they play a major role for the carbon export flux due to fecal pellet production and fragmentation of particles. They are distributed all over the ocean and constitute a large variety of organisms. Because of large uncertainties in the estimation of parameters and the forms of equations, zooplankton are often parameterized in strongly simplified forms in ocean biogeochemical models. Nowadays, however, increasing data availability from experiments and observations makes it possible to implement different zooplankton functional types in models. This thesis presents the implementation of new zooplankton functional types into an ocean biogeochemical model. Subsequently, the sensitivity of net primary production, carbon export and nutrients to the implementation of these new zooplankton functional types was analyzed. In my thesis, I use a global setup of the biogeochemical model Regulated Ocean Ecosystem Model (REcoM) coupled with the Finite Element Sea-Ice Ocean Model (FESOM). I implemented an explicit parametrization of micro-, meso-, and polar macrozooplankton based on process rates and biomass observations from the literature, as well as a representation of fast-sinking detritus. This extended version of REcoM was used to analyze the role of zooplankton for carbon export, nutrient recycling, and phytoplankton bloom phenology. In a second step, a new sinking routine that considers the roles of mineral ballasting and seawater viscosity on the particle sinking speed and the effect of oxygen on remineralization rates was added to the model. This set-up was used to assess the role of each factor (ballast minerals, seawater viscosity, and oxygen concentration) for the export and transfer efficiencies of carbon, i.e. the amount of particulate organic carbon that is exported across the euphotic depth and ... Doctoral or Postdoctoral Thesis Sea ice Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
biogeochemical modelling biogogical carbon pump zooplankton functional types 570 570 Life sciences biology ddc:570 |
spellingShingle |
biogeochemical modelling biogogical carbon pump zooplankton functional types 570 570 Life sciences biology ddc:570 Karakuş, Onur The role of zooplankton for carbon export, nutrient recycling and phytoplankton bloom phenology in an ocean biogeochemical model |
topic_facet |
biogeochemical modelling biogogical carbon pump zooplankton functional types 570 570 Life sciences biology ddc:570 |
description |
Marine zooplankton, i.e., heterotrophic marine plankton, serve as trophic links between primary producers and higher trophic levels, and as recyclers for nutrients and carbon in the pelagic ecosystem. In addition, they play a major role for the carbon export flux due to fecal pellet production and fragmentation of particles. They are distributed all over the ocean and constitute a large variety of organisms. Because of large uncertainties in the estimation of parameters and the forms of equations, zooplankton are often parameterized in strongly simplified forms in ocean biogeochemical models. Nowadays, however, increasing data availability from experiments and observations makes it possible to implement different zooplankton functional types in models. This thesis presents the implementation of new zooplankton functional types into an ocean biogeochemical model. Subsequently, the sensitivity of net primary production, carbon export and nutrients to the implementation of these new zooplankton functional types was analyzed. In my thesis, I use a global setup of the biogeochemical model Regulated Ocean Ecosystem Model (REcoM) coupled with the Finite Element Sea-Ice Ocean Model (FESOM). I implemented an explicit parametrization of micro-, meso-, and polar macrozooplankton based on process rates and biomass observations from the literature, as well as a representation of fast-sinking detritus. This extended version of REcoM was used to analyze the role of zooplankton for carbon export, nutrient recycling, and phytoplankton bloom phenology. In a second step, a new sinking routine that considers the roles of mineral ballasting and seawater viscosity on the particle sinking speed and the effect of oxygen on remineralization rates was added to the model. This set-up was used to assess the role of each factor (ballast minerals, seawater viscosity, and oxygen concentration) for the export and transfer efficiencies of carbon, i.e. the amount of particulate organic carbon that is exported across the euphotic depth and ... |
author2 |
Hauck, Judith Le Quéré, Corinne |
format |
Doctoral or Postdoctoral Thesis |
author |
Karakuş, Onur |
author_facet |
Karakuş, Onur |
author_sort |
Karakuş, Onur |
title |
The role of zooplankton for carbon export, nutrient recycling and phytoplankton bloom phenology in an ocean biogeochemical model |
title_short |
The role of zooplankton for carbon export, nutrient recycling and phytoplankton bloom phenology in an ocean biogeochemical model |
title_full |
The role of zooplankton for carbon export, nutrient recycling and phytoplankton bloom phenology in an ocean biogeochemical model |
title_fullStr |
The role of zooplankton for carbon export, nutrient recycling and phytoplankton bloom phenology in an ocean biogeochemical model |
title_full_unstemmed |
The role of zooplankton for carbon export, nutrient recycling and phytoplankton bloom phenology in an ocean biogeochemical model |
title_sort |
role of zooplankton for carbon export, nutrient recycling and phytoplankton bloom phenology in an ocean biogeochemical model |
publisher |
Universität Bremen |
publishDate |
2022 |
url |
https://media.suub.uni-bremen.de/handle/elib/6088 https://doi.org/10.26092/elib/1670 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib60889 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/6088 https://doi.org/10.26092/elib/1670 doi:10.26092/elib/1670 urn:nbn:de:gbv:46-elib60889 |
op_rights |
info:eu-repo/semantics/openAccess CC BY-SA 4.0 (Attribution-ShareAlike 4.0) https://creativecommons.org/licenses/by-sa/4.0/ |
op_rightsnorm |
CC-BY-SA |
op_doi |
https://doi.org/10.26092/elib/1670 |
_version_ |
1766195545136693248 |