Modeling Physical and Biological Processes in Antarctic Sea Ice
In this work, a coupled biological-physical sea ice model was developed to investigate the influence of transient changes in environmental conditions (e.g. light, temperature and nutrient dynamics) on the sea ice biological communities. To simulate this complex environment, the biological model uses...
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Universität Bremen
2002
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/1821 2023-05-15T13:41:01+02:00 Modeling Physical and Biological Processes in Antarctic Sea Ice Modellierung von physikalischen und biologischen Prozesse im antarktischen Meereis Belem, Andre Luiz Wolf-Gladrow, Dieter Bathmann, Ulrich 2002-02-28 application/pdf https://media.suub.uni-bremen.de/handle/elib/1821 https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000002639 eng eng Universität Bremen FB2 Biologie/Chemie https://media.suub.uni-bremen.de/handle/elib/1821 urn:nbn:de:gbv:46-diss000002639 info:eu-repo/semantics/openAccess sea ice primary production biological modeling physical modeling 32 ddc:32 Dissertation doctoralThesis 2002 ftsubbremen 2022-11-09T07:09:41Z In this work, a coupled biological-physical sea ice model was developed to investigate the influence of transient changes in environmental conditions (e.g. light, temperature and nutrient dynamics) on the sea ice biological communities. To simulate this complex environment, the biological model uses self-adapting physiological schemes and variable cellular N:C and Si:C quotas, including co-limitation, to decouple biomass accumulation and inorganic nutrient availability. Forcing terms (ice temperature, brine salinity, light and nutrients) are controlled by the thermodynamic sea ice model, with emphasis on the light and heat conduction through the sea ice and desalination processes (flux of brine). The model indicates that thermodynamic processes controlling ice formation and growth play a key role in the establishment and vertical distribution of biological sea ice communities. The coupled biological-physical model is described in a Lagrangian manner, where the time-dependent position of simulated ice floes extracted from ice velocity fields are used to compute forcing parameters (e.g. air temperature, oceanic heat flux, solar radiation). A good agreement between model results and field observations was found, indicating that the model well represents the physical and biological processes in sea ice. The model was also used to estimate the total productivity of sea ice in the Weddell Sea, resulting in an annual carbon production of 11 Tg C with a strong seasonal variability. The most productive months are between December and February, when light and temperature conditions in the sea ice are considerably enhanced as compared to the other months. Between May and September, the sea ice productivity ranges from 0.16 to 0.6 Tg C month-1 contributing 17% to the total annual production. Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarktis* Sea ice Weddell Sea Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Antarctic Weddell Weddell Sea |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
sea ice primary production biological modeling physical modeling 32 ddc:32 |
spellingShingle |
sea ice primary production biological modeling physical modeling 32 ddc:32 Belem, Andre Luiz Modeling Physical and Biological Processes in Antarctic Sea Ice |
topic_facet |
sea ice primary production biological modeling physical modeling 32 ddc:32 |
description |
In this work, a coupled biological-physical sea ice model was developed to investigate the influence of transient changes in environmental conditions (e.g. light, temperature and nutrient dynamics) on the sea ice biological communities. To simulate this complex environment, the biological model uses self-adapting physiological schemes and variable cellular N:C and Si:C quotas, including co-limitation, to decouple biomass accumulation and inorganic nutrient availability. Forcing terms (ice temperature, brine salinity, light and nutrients) are controlled by the thermodynamic sea ice model, with emphasis on the light and heat conduction through the sea ice and desalination processes (flux of brine). The model indicates that thermodynamic processes controlling ice formation and growth play a key role in the establishment and vertical distribution of biological sea ice communities. The coupled biological-physical model is described in a Lagrangian manner, where the time-dependent position of simulated ice floes extracted from ice velocity fields are used to compute forcing parameters (e.g. air temperature, oceanic heat flux, solar radiation). A good agreement between model results and field observations was found, indicating that the model well represents the physical and biological processes in sea ice. The model was also used to estimate the total productivity of sea ice in the Weddell Sea, resulting in an annual carbon production of 11 Tg C with a strong seasonal variability. The most productive months are between December and February, when light and temperature conditions in the sea ice are considerably enhanced as compared to the other months. Between May and September, the sea ice productivity ranges from 0.16 to 0.6 Tg C month-1 contributing 17% to the total annual production. |
author2 |
Wolf-Gladrow, Dieter Bathmann, Ulrich |
format |
Doctoral or Postdoctoral Thesis |
author |
Belem, Andre Luiz |
author_facet |
Belem, Andre Luiz |
author_sort |
Belem, Andre Luiz |
title |
Modeling Physical and Biological Processes in Antarctic Sea Ice |
title_short |
Modeling Physical and Biological Processes in Antarctic Sea Ice |
title_full |
Modeling Physical and Biological Processes in Antarctic Sea Ice |
title_fullStr |
Modeling Physical and Biological Processes in Antarctic Sea Ice |
title_full_unstemmed |
Modeling Physical and Biological Processes in Antarctic Sea Ice |
title_sort |
modeling physical and biological processes in antarctic sea ice |
publisher |
Universität Bremen |
publishDate |
2002 |
url |
https://media.suub.uni-bremen.de/handle/elib/1821 https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000002639 |
geographic |
Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarktis* Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Antarktis* Sea ice Weddell Sea |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/1821 urn:nbn:de:gbv:46-diss000002639 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766144583717093376 |