Processes in the Southern Ocean carbon cycle: Dissolution of carbonate sediments and inter-annual variability of carbon fluxes
The Southern Ocean (SO) carbon cycle is and will be undergoing various changes in a high-CO2 world. This thesis analyzes two key processes: dissolution of carbonate sediments on Antarctic shelves and inter-annual variability of upper ocean carbon fluxes. In the first part of the thesis, the main que...
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Universität Bremen
2012
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Online Access: | https://media.suub.uni-bremen.de/handle/elib/350 https://nbn-resolving.org/urn:nbn:de:gbv:46-00102718-17 |
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/350 2023-05-15T14:04:15+02:00 Processes in the Southern Ocean carbon cycle: Dissolution of carbonate sediments and inter-annual variability of carbon fluxes Prozesse im Kohlenstoffkreislauf des Südpolarmeeres: Auflösung von Kalziumkarbonat-haltigen Sedimenten und zwischenjährliche Variabilität von Kohlenstoffflüssen Hauck, Judith Wolf-Gladrow, Dieter Schneider, Birgit 2012-07-13 application/pdf https://media.suub.uni-bremen.de/handle/elib/350 https://nbn-resolving.org/urn:nbn:de:gbv:46-00102718-17 eng eng Universität Bremen FB2 Biologie/Chemie https://media.suub.uni-bremen.de/handle/elib/350 urn:nbn:de:gbv:46-00102718-17 info:eu-repo/semantics/openAccess carbon cycle ocean acidification Antarctica negative feedback CO2 sink 550 550 Earth sciences and geology ddc:550 Dissertation doctoralThesis 2012 ftsubbremen 2022-11-09T07:09:21Z The Southern Ocean (SO) carbon cycle is and will be undergoing various changes in a high-CO2 world. This thesis analyzes two key processes: dissolution of carbonate sediments on Antarctic shelves and inter-annual variability of upper ocean carbon fluxes. In the first part of the thesis, the main question is whether dissolution of carbonate sediments from Antarctic shelves can be a negative feedback to ocean acidification. Patterns in the CaCO3 distribution are related to primary production in the overlying water column. Based on this relationship, the inventory of CaCO3 on all Antarctic shelves is calculated to be 4 Pg CaCO3. This suggests that dissolution of CaCO3 from the sediments will not delay acidification. The second process study addresses the inter-annual variability of carbon fluxes in the SO related to the Southern Annular Mode (SAM). The positive phase of the SAM is characterized by stronger upwelling of carbon and nutrient-rich deep water. The carbon content of the surface layer increases and more natural carbon is released to the atmosphere. South of the Polar Front, however, more CO2 is drawn down by stronger biological export production. Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctica Ocean acidification Southern Ocean Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Antarctic Southern Ocean |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
carbon cycle ocean acidification Antarctica negative feedback CO2 sink 550 550 Earth sciences and geology ddc:550 |
spellingShingle |
carbon cycle ocean acidification Antarctica negative feedback CO2 sink 550 550 Earth sciences and geology ddc:550 Hauck, Judith Processes in the Southern Ocean carbon cycle: Dissolution of carbonate sediments and inter-annual variability of carbon fluxes |
topic_facet |
carbon cycle ocean acidification Antarctica negative feedback CO2 sink 550 550 Earth sciences and geology ddc:550 |
description |
The Southern Ocean (SO) carbon cycle is and will be undergoing various changes in a high-CO2 world. This thesis analyzes two key processes: dissolution of carbonate sediments on Antarctic shelves and inter-annual variability of upper ocean carbon fluxes. In the first part of the thesis, the main question is whether dissolution of carbonate sediments from Antarctic shelves can be a negative feedback to ocean acidification. Patterns in the CaCO3 distribution are related to primary production in the overlying water column. Based on this relationship, the inventory of CaCO3 on all Antarctic shelves is calculated to be 4 Pg CaCO3. This suggests that dissolution of CaCO3 from the sediments will not delay acidification. The second process study addresses the inter-annual variability of carbon fluxes in the SO related to the Southern Annular Mode (SAM). The positive phase of the SAM is characterized by stronger upwelling of carbon and nutrient-rich deep water. The carbon content of the surface layer increases and more natural carbon is released to the atmosphere. South of the Polar Front, however, more CO2 is drawn down by stronger biological export production. |
author2 |
Wolf-Gladrow, Dieter Schneider, Birgit |
format |
Doctoral or Postdoctoral Thesis |
author |
Hauck, Judith |
author_facet |
Hauck, Judith |
author_sort |
Hauck, Judith |
title |
Processes in the Southern Ocean carbon cycle: Dissolution of carbonate sediments and inter-annual variability of carbon fluxes |
title_short |
Processes in the Southern Ocean carbon cycle: Dissolution of carbonate sediments and inter-annual variability of carbon fluxes |
title_full |
Processes in the Southern Ocean carbon cycle: Dissolution of carbonate sediments and inter-annual variability of carbon fluxes |
title_fullStr |
Processes in the Southern Ocean carbon cycle: Dissolution of carbonate sediments and inter-annual variability of carbon fluxes |
title_full_unstemmed |
Processes in the Southern Ocean carbon cycle: Dissolution of carbonate sediments and inter-annual variability of carbon fluxes |
title_sort |
processes in the southern ocean carbon cycle: dissolution of carbonate sediments and inter-annual variability of carbon fluxes |
publisher |
Universität Bremen |
publishDate |
2012 |
url |
https://media.suub.uni-bremen.de/handle/elib/350 https://nbn-resolving.org/urn:nbn:de:gbv:46-00102718-17 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica Ocean acidification Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Ocean acidification Southern Ocean |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/350 urn:nbn:de:gbv:46-00102718-17 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766275276824641536 |