Subantarctic zone oceanography - SAZ Project 1997-1998 - Phosphate Modeling
Progress Code: completed Statement: See the referenced papers for more information. Oceanographic processes in the subantarctic region contribute crucially to the physical and biogeochemical aspects of the global climate system. To explore and quantify these contributions, the Antarctic Cooperative...
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ftands:oai:ands.org.au::2816967 2024-09-15T17:45:51+00:00 Subantarctic zone oceanography - SAZ Project 1997-1998 - Phosphate Modeling AADC (owner) AADC, DATA OFFICER (distributor) AADC, DATA OFFICER (custodian) AU/AADC > Australian Antarctic Data Centre, Australia (hasAssociationWith) Australian Antarctic Data Centre (publisher) Australian Antarctic Division (sponsor) CONNELL, DAVE J. (author) TRULL, THOMAS WILLIAM (hasPrincipalInvestigator) Trull, T.W. (originator) Spatial: westlimit=141.5; southlimit=-55.0; eastlimit=141.5; northlimit=-42.0 Temporal: From 1998-03-01 to 1998-03-31 https://researchdata.edu.au/subantarctic-zone-oceanography-phosphate-modeling/2816967 unknown Australian Ocean Data Network https://researchdata.edu.au/subantarctic-zone-oceanography-phosphate-modeling/2816967 ASAC_2256_Phosphate AU/AADC > Australian Antarctic Data Centre, Australia oceans EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NUTRIENTS PHOSPHATE SAZ SHIPS R/V AA > R/V Aurora Australis AMD/AU CEOS AMD ACE/CRC OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR dataset ftands 2024-08-06T01:58:58Z Progress Code: completed Statement: See the referenced papers for more information. Oceanographic processes in the subantarctic region contribute crucially to the physical and biogeochemical aspects of the global climate system. To explore and quantify these contributions, the Antarctic Cooperative Research Centre (CRC) organised the SAZ Project, a multidisciplinary, multiship investigation carried out south of Australia in the austral summer of 1997-1998. Taken from the abstracts of the referenced paper: We developed and applied a one-dimensional (z) biophysical model to the Subantarctic Zone (SAZ) and the Polar Frontal Zone (PFZ) to simulate seasonal phosphate export production and resupply. The physical component of our model was capable of reproducing the observed seasonal amplitude of sea surface temperature and mixed layer depth. In the biological component of the model we used incident light, mixed layer depth, phosphate availability, and estimates of phytoplankton biomass from the Sea-viewing Wide Field-of-view Sensor to determine production and tuned the model to reproduce the observed seasonal cycle of phosphate. We carried out a series of sensitivity studies, taking into account uncertainties in both physical fields and biological formulations (including potential influence of iron limitation), which led to several robust conclusions (as represented by the ranges below). The major growing season contributed 66-76% of the annual export production in both regions. The simulated annual export production was significantly higher in the PZF (68-83 mmol P m-2) than in the SAZ (52-61 mmol P m-2) despite the PFZ's having lower seasonal nutrient depletion. The higher export production in the PFZ was due to its greater resupply of phosphate to the upper ocean during the September to March period (27-37 mmol P m-2) relative to that in the SAZ (8-15 mmol P m-2). Hence seasonal nutrient depletion was a better estimate of seasonal export production in the SAZ, as demonstrated by its higher ratio of seasonal ... Dataset Antarc* Antarctic aurora australis Southern Ocean Research Data Australia (Australian National Data Service - ANDS) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
oceans EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NUTRIENTS PHOSPHATE SAZ SHIPS R/V AA > R/V Aurora Australis AMD/AU CEOS AMD ACE/CRC OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR |
spellingShingle |
oceans EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NUTRIENTS PHOSPHATE SAZ SHIPS R/V AA > R/V Aurora Australis AMD/AU CEOS AMD ACE/CRC OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR Subantarctic zone oceanography - SAZ Project 1997-1998 - Phosphate Modeling |
topic_facet |
oceans EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NUTRIENTS PHOSPHATE SAZ SHIPS R/V AA > R/V Aurora Australis AMD/AU CEOS AMD ACE/CRC OCEAN > SOUTHERN OCEAN GEOGRAPHIC REGION > POLAR |
description |
Progress Code: completed Statement: See the referenced papers for more information. Oceanographic processes in the subantarctic region contribute crucially to the physical and biogeochemical aspects of the global climate system. To explore and quantify these contributions, the Antarctic Cooperative Research Centre (CRC) organised the SAZ Project, a multidisciplinary, multiship investigation carried out south of Australia in the austral summer of 1997-1998. Taken from the abstracts of the referenced paper: We developed and applied a one-dimensional (z) biophysical model to the Subantarctic Zone (SAZ) and the Polar Frontal Zone (PFZ) to simulate seasonal phosphate export production and resupply. The physical component of our model was capable of reproducing the observed seasonal amplitude of sea surface temperature and mixed layer depth. In the biological component of the model we used incident light, mixed layer depth, phosphate availability, and estimates of phytoplankton biomass from the Sea-viewing Wide Field-of-view Sensor to determine production and tuned the model to reproduce the observed seasonal cycle of phosphate. We carried out a series of sensitivity studies, taking into account uncertainties in both physical fields and biological formulations (including potential influence of iron limitation), which led to several robust conclusions (as represented by the ranges below). The major growing season contributed 66-76% of the annual export production in both regions. The simulated annual export production was significantly higher in the PZF (68-83 mmol P m-2) than in the SAZ (52-61 mmol P m-2) despite the PFZ's having lower seasonal nutrient depletion. The higher export production in the PFZ was due to its greater resupply of phosphate to the upper ocean during the September to March period (27-37 mmol P m-2) relative to that in the SAZ (8-15 mmol P m-2). Hence seasonal nutrient depletion was a better estimate of seasonal export production in the SAZ, as demonstrated by its higher ratio of seasonal ... |
author2 |
AADC (owner) AADC, DATA OFFICER (distributor) AADC, DATA OFFICER (custodian) AU/AADC > Australian Antarctic Data Centre, Australia (hasAssociationWith) Australian Antarctic Data Centre (publisher) Australian Antarctic Division (sponsor) CONNELL, DAVE J. (author) TRULL, THOMAS WILLIAM (hasPrincipalInvestigator) Trull, T.W. (originator) |
format |
Dataset |
title |
Subantarctic zone oceanography - SAZ Project 1997-1998 - Phosphate Modeling |
title_short |
Subantarctic zone oceanography - SAZ Project 1997-1998 - Phosphate Modeling |
title_full |
Subantarctic zone oceanography - SAZ Project 1997-1998 - Phosphate Modeling |
title_fullStr |
Subantarctic zone oceanography - SAZ Project 1997-1998 - Phosphate Modeling |
title_full_unstemmed |
Subantarctic zone oceanography - SAZ Project 1997-1998 - Phosphate Modeling |
title_sort |
subantarctic zone oceanography - saz project 1997-1998 - phosphate modeling |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.edu.au/subantarctic-zone-oceanography-phosphate-modeling/2816967 |
op_coverage |
Spatial: westlimit=141.5; southlimit=-55.0; eastlimit=141.5; northlimit=-42.0 Temporal: From 1998-03-01 to 1998-03-31 |
genre |
Antarc* Antarctic aurora australis Southern Ocean |
genre_facet |
Antarc* Antarctic aurora australis Southern Ocean |
op_source |
AU/AADC > Australian Antarctic Data Centre, Australia |
op_relation |
https://researchdata.edu.au/subantarctic-zone-oceanography-phosphate-modeling/2816967 ASAC_2256_Phosphate |
_version_ |
1810493770796367872 |