[Source_Name: Short_Name='R/V AA']
K-Axis voyage of the Aurora Australis, 2015-16 season - Kerguelen Axis Marine Science parent metadata recordEntry ID: AAS_4344_K-AXIS_Voyage
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Abstract: The Kerguelen Axis voyage was planned to collect data to enhance the realism of end-to-end ecosystem models being developed in the Antarctic Climate and Ecosystems Cooperative Research Centre, to investigate the effects of climate change and ocean acidification on Southern Ocean ecosystems in the Indian Sector (particularly in relation to factors affecting the northern distribution of Antarctic ... krill) and to contribute to assessment of the spatial relationship of mesopelagic mid-trophic level species, in particular zooplanktivores, to foraging strategies by marine mammals and birds on the Kerguelen Plateau.
Nine projects were undertaken aboard the Aurora Australis. Each project had individual objectives and outputs, and there are metadata records for each data set collected. They were designed to be complementary in order that the whole data set and project analyses could be used to address the objectives of the Kerguelen Axis program. Observations will be contributed to the Southern Ocean Observing System (SOOS) and will facilitate the design of future ecosystem observing in the region.
Purpose: Complimentary studies were designed to investigate: i) the key physical and biological drivers of Antarctic krill distribution, including factors that determine its northern limits, that can be used in ecosystem models aimed at investigating the dynamics of the krill-based food web and how this may be impacted by climate change and ocean acidification on Southern Ocean ecosystem; ii) the relative ... importance of different sources of iron to primary production on the Kerguelen Axis, notably the difference between supply from the shallow plateau with and without islands compared to areas of open ocean, and how this affects the composition of phytoplankton assemblages and production and the consequent effects on zooplankton. This will provide for correct representation and parameterisation in ecosystem models of many key lower trophic species in the Indian Sector; iii) change in the oceanography of the Indian Sector of the Southern Ocean based on repeat measurements of Antarctic Bottom Water (AABW); iv) the relationship between myctophid fish, zooplankton and oceanographic features of the region of BANZARE Bank and the northern Kerguelen Plateau; ii) the potential for the spatial distribution of mesopelagic fish to determine the foraging hotspots of marine mammals and birds in the region; iii) implementation and evaluation of size-structured fish-based food web models for the northern Kerguelen Plateau as well as of a regional application of the mesopelagic fish model within the ecosystem model, SEAPODYM.
Data Set Citation
Dataset Originator/Creator: Constable, A. and Swadling, K.
Dataset Title: K-Axis voyage of the Aurora Australis, 2015-16 season - Kerguelen Axis Marine Science parent metadata record
Dataset Series Name: CAASM Metadata
Dataset Publisher: Australian Antarctic Data Centre
Version: NAOnline Resource: https://data.aad.gov.au/aadc/metadata/metadata_redirect.cfm?md=/AMD...
Start Date: 2016-01-11Stop Date: 2016-02-19
OCEANS > OCEAN CIRCULATION > OCEAN CURRENTS
BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > PHYTOPLANKTON
BIOLOGICAL CLASSIFICATION > PROTISTS > PLANKTON > PHYTOPLANKTON
BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > ZOOPLANKTON
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > EUPHAUSIIDS (KRILL)
OCEANS > OCEAN ACOUSTICS > ACOUSTIC TOMOGRAPHY
BIOLOGICAL CLASSIFICATION > BACTERIA/ARCHAEA
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > COPEPODS
OCEANS > OCEAN CHEMISTRY > CARBON DIOXIDE
OCEANS > OCEAN CHEMISTRY > STABLE ISOTOPES
OCEANS > OCEAN CHEMISTRY > NUTRIENTS
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > FISH
BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > PELAGIC
OCEANS > OCEAN CHEMISTRY > TRACE ELEMENTS
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CETACEANS
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CARNIVORES > SEALS/SEA LIONS/WALRUSES
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > BIRDS
Quality See the child records for further information
Generally, the K-Axis marine science voyage met science goals. Some on-board experiments were terminated early due to the grounding of the vessel at Mawson Station in late February 2016 and scientific sampling was also halted at this time.
Access Constraints These data are not yet publicly available.
Use Constraints This data set conforms to the PICCCBY Attribution License (http://creativecommons.org/licenses/by/3.0/).
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4344... when using these data.
Data Set Progress
Role: TECHNICAL CONTACT
Phone: +61 3 6232 3558
Email: andrew.constable at aad.gov.au
203 Channel Highway Australian Antarctic Division
Province or State: Tasmania
Postal Code: 7050
Phone: (03) 6226-6903
Email: kerrie.swadling at utas.edu.au
Institute for Marine and Antarctic Studies and Antarctic Climate and Ecosystems CRC University of Tasmania PB 129
Province or State: Tasmania
Postal Code: 7001
Role: DIF AUTHOR
Email: katherine.tattersall at utas.edu.au
Province or State: Tasmania
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2016-08-16
Last DIF Revision Date: 2018-07-10