Export and isotropic composition of organic matter in the Subantarctic and polar frontal zones of the Southern Ocean ...
This thesis aims to improve estimates of net community production and carbon export in the Subantarctic (SAZ) and Polar Frontal Zones (PFZ) of the Southern Ocean from estimates of nutrient depletion, and to use measurements of stable isotopes in suspended and sinking organic matter to assess ecosyst...
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University Of Tasmania
2023
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ftdatacite:10.25959/23231600.v1 2023-06-11T04:16:58+02:00 Export and isotropic composition of organic matter in the Subantarctic and polar frontal zones of the Southern Ocean ... Lourey, Martin John 2023 https://dx.doi.org/10.25959/23231600.v1 https://figshare.utas.edu.au/articles/thesis/Export_and_isotropic_composition_of_organic_matter_in_the_Subantarctic_and_polar_frontal_zones_of_the_Southern_Ocean/23231600/1 unknown University Of Tasmania https://dx.doi.org/10.25959/23231600 In Copyright http://rightsstatements.org/vocab/InC/1.0/ article-journal Text ScholarlyArticle Thesis 2023 ftdatacite https://doi.org/10.25959/23231600.v110.25959/23231600 2023-06-01T12:11:20Z This thesis aims to improve estimates of net community production and carbon export in the Subantarctic (SAZ) and Polar Frontal Zones (PFZ) of the Southern Ocean from estimates of nutrient depletion, and to use measurements of stable isotopes in suspended and sinking organic matter to assess ecosystem processes responsible for nitrate and CO2 depletion. Estimates of seasonal surface water nutrient depletion corrected for frontal movements and changes in water masses using observed quasi-linear nutrient-salinity relationships, suggest that from July to March nitrate depletion and carbon export in the SAZ (510 mmol N 111 -2 and 3,400 mmol C m-2 ) was approximately twice that of the PFZ (250 mmol N m-2and 1,600 mmol C m -2 ). Phosphate depletions were similar (29 and 24 mmol P m -2for the SAZ and PFZ, respectively) between the regions due to a lower N/P ratio of depletion in the PFZ (8.3 ± 5.4) than the SAZ (15.1 ± 2.3). Comparison with sediment trap and primary production estimates suggests that ... Thesis Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Southern Ocean |
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description |
This thesis aims to improve estimates of net community production and carbon export in the Subantarctic (SAZ) and Polar Frontal Zones (PFZ) of the Southern Ocean from estimates of nutrient depletion, and to use measurements of stable isotopes in suspended and sinking organic matter to assess ecosystem processes responsible for nitrate and CO2 depletion. Estimates of seasonal surface water nutrient depletion corrected for frontal movements and changes in water masses using observed quasi-linear nutrient-salinity relationships, suggest that from July to March nitrate depletion and carbon export in the SAZ (510 mmol N 111 -2 and 3,400 mmol C m-2 ) was approximately twice that of the PFZ (250 mmol N m-2and 1,600 mmol C m -2 ). Phosphate depletions were similar (29 and 24 mmol P m -2for the SAZ and PFZ, respectively) between the regions due to a lower N/P ratio of depletion in the PFZ (8.3 ± 5.4) than the SAZ (15.1 ± 2.3). Comparison with sediment trap and primary production estimates suggests that ... |
format |
Thesis |
author |
Lourey, Martin John |
spellingShingle |
Lourey, Martin John Export and isotropic composition of organic matter in the Subantarctic and polar frontal zones of the Southern Ocean ... |
author_facet |
Lourey, Martin John |
author_sort |
Lourey, Martin John |
title |
Export and isotropic composition of organic matter in the Subantarctic and polar frontal zones of the Southern Ocean ... |
title_short |
Export and isotropic composition of organic matter in the Subantarctic and polar frontal zones of the Southern Ocean ... |
title_full |
Export and isotropic composition of organic matter in the Subantarctic and polar frontal zones of the Southern Ocean ... |
title_fullStr |
Export and isotropic composition of organic matter in the Subantarctic and polar frontal zones of the Southern Ocean ... |
title_full_unstemmed |
Export and isotropic composition of organic matter in the Subantarctic and polar frontal zones of the Southern Ocean ... |
title_sort |
export and isotropic composition of organic matter in the subantarctic and polar frontal zones of the southern ocean ... |
publisher |
University Of Tasmania |
publishDate |
2023 |
url |
https://dx.doi.org/10.25959/23231600.v1 https://figshare.utas.edu.au/articles/thesis/Export_and_isotropic_composition_of_organic_matter_in_the_Subantarctic_and_polar_frontal_zones_of_the_Southern_Ocean/23231600/1 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://dx.doi.org/10.25959/23231600 |
op_rights |
In Copyright http://rightsstatements.org/vocab/InC/1.0/ |
op_doi |
https://doi.org/10.25959/23231600.v110.25959/23231600 |
_version_ |
1768375688720547840 |