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Earth Science | Oceans | Ocean Optics | Turbidity

92 record(s)

 

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    This dataset comprises the phytoplankton abundance and biovolume estimates as part of a broader sampling program carried out at the Southern Ocean Time Series, a facility within the Integrated Marine Observing System (IMOS). The primary focus is sustained observing of ocean properties and processes important to climate, carbon cycling, and ocean productivity. Regular phytoplankton samples are collected at approximately 14 day intervals (exact intervals and seasonal coverage dependent on deployment length). The moorings are serviced annually, at which time the existing moorings are recovered and new moorings are deployed. Water samples from within the surface mixed-layer are collected at pre-programmed intervals using a Remote Access Sampler, in pairs about 1 hour apart. One sample in each pair is preserved for phytoplankton community composition by microscopy, and the other sample is preserved and used for accompanying chemical analysis of nutrients, total dissolved inorganic carbon (DIC) and alkalinity. Each sample is collected from within the surface mixed-layer at 32 m depth (2010 - 2017) or 5 m depth (2018-current) depending on the design of the mooring surface assembly and instrumentation. Typically a maximum of 24 samples are collected over an annual deployment cycle. The samples collected are analysed for: 1. Community composition / abundance (cells/L) 2. calculated biovolume (um3/L). Protocols for the phytoplankton time-series are described in Eriksen et al (2018), and the annual sample reports for each deployment. Data storage and access is planned to be interoperable with other national and international programs through the IMOS Infrastructure. Station metadata can be found through this resource. Data is available freely via the AODN portal: https://portal.aodn.org.au. As the taxonomic resolution of the data has changed over time, due to continual training, it is important that users refer to the change log tables included in your data download. These will provide information on the validity of the taxa, from what date we have been identifying certain taxa etc. Classification fields may be blank depending on the level to which that taxa has been identified, i.e. if only identified to family, genus and species will be blank.

  • This record describes the Conductivity-Temperature-Depth (CTD) data collected from the Marine National Facility RV Investigator voyage IN2014_E03. This is the first trial voyage for the RV Investigator departing Hobart on the 11th November and returning to Hobart on the 17th November 2014. CTD data is collected using a 12/24/36 bottle rosette which can include auxilliary instruments such as: ecotriplet, transmissometer and fluorometers (phytoplankton, oxygen flourescence and turbidity). CTD are sampled at specified stations (refer to map), the system can operate at a maximum depth of 6,000 metres. The 12 bottle carousel CTD is used for trace metal work. The CTD data for this voyage will not be processed. Processing may be arranged upon request.

  • This record describes the Conductivity-Temperature-Depth (CTD) data collected from the Marine National Facility RV Investigator voyage IN2015_V01 titled IMOS Southern Ocean time series automated moorings for climate and carbon cycle studies southwest of Tasmania. This was the first research voyage for the RV Investigator departing Hobart on the 21st March and returning to Hobart on the 30th March, 2015. Data for 3 deployments were acquired using the Seabird SBE911 CTD 21, fitted with 24 ten litre bottles on the rosette sampler. The Seabird SBE911 has dual conductivity and temperature sensors. The CTD was additionally fitted with SBE43 dissolved oxygen sensors, Fluorometer, Transmissometer and PAR sensors. These sensors are described in the processing report. The collected data was subsequently processed and archived within the CSIRO Oceans and Atmosphere (O&A) in Hobart. Additional information regarding this dataset may be contained in the Voyage Summary and the CTD Data Processing Report.

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    The Kimberley region is vast, remote and difficult and expensive to access and carry out field work in. Remote sensing technologies can provide cost effective methods to gather historical and baseline data at synoptic scales as well as near-real-time observations from metre to kilometre resolution. The Kimberley Node Project 1.4 focused on monitoring turbidity with reference to its impact on the water column and substrate light environment. The projects objectives were to analyse uncertainties of remotely sensed turbidity products by comparison of different algorithms and different resolution products with each other and with archived in situ data; and to analyse time series of remotely sensed turbidity data to provide first-stage pilot products that may be applicable for future use as marine management tools. In-situ water quality data was obtained from a number of cruises that occurred along the Kimberley coastline including Collier Bay; Walcott Inlet, Outer King Sound, Koolama Bay and Lesueur Islands, Van Diemen Gulf and the Pilbara Coast and used to validate remote sensing products. Data associated with this metadata record relates to in-situ water quality. MODIS satellite data obtained from IMOS has not been stored as part of this record, but can be accessed direct via IMOS (http://www.imos.org.au/).

  • This record describes the data (CTD, Dissolved Oxygen, Transmissometer, PAR, ECO Triplet, Nitrate, Fluorescence and LOPC) collected using the towed TRIAXUS platform on Investigator voyage IN2015_V01, titled: "IMOS Southern Ocean Time Series automated moorings for climate and carbon cycle studies southwest of Tasmania." The voyage took place between March 21 and March 30, 2015 departing from Hobart (TAS) and arriving in Hobart. CTD, Dissolved Oxygen, Transmissometer, PAR, and ECO Triplet have been processed and are made available via the links below. The collected data were subsequently processed and archived within the CSIRO Oceans and Atmosphere (O&A) Information and Data Centre (IDC) in Hobart. Additional information regarding this dataset may be contained in the Voyage Summary and the Data Processing Report.

  • This record describes the Conductivity-Temperature-Depth (CTD) data collected from the Marine National Facility RV Investigator Event Voyage IN2015_E03. This is a trial voyage for the RV Investigator departing Hobart on the 16th April and returning to Hobart on the 23rd April, 2015. CTD data is collected using a 12/24/36 bottle rosette which can include auxiliary instruments such as: ecotriplet, transmissometer and fluorometers (phytoplankton, oxygen flourescence and turbidity). CTD are sampled at specified stations (refer to map), the system can operate at a maximum depth of 6,000 metres. The 12 bottle carousel CTD is used for trace metal work. The collected data is subsequently processed and QC'd by the DAP group and archived within the CSIRO Oceans and Atmosphere (O&A) in Hobart. Additional information regarding this dataset may be contained in the Voyage Summary and the CTD Data Processing Report.

  • This record describes the Conductivity-Temperature-Depth (CTD) data collected from the Marine National Facility RV Investigator Voyage IN2015_v02 titled: Sustained monitoring of the East Australian Current: Mass, heat and freshwater transports, departing Sydney on the 15th May and arriving in Brisbane on the 26th May, 2015. Data for 18 deployments were acquired using the Seabird SBE911 CTD 20, fitted with 24 ten litre bottles on the rosette sampler. The Seabird SBE911 with dual conductivity and temperature sensors. The CTD was additionally fitted with SBE43 dissolved oxygen sensors, Transmissometer, PAR, and Fluorometer. These sensors are described in the processing report. The collected data was subsequently processed and archived within the CSIRO Oceans and Atmosphere (O&A) in Hobart. Additional information regarding this dataset may be contained in the Voyage Summary and the CTD Data Processing Report

  • This record describes the Conductivity-Temperature-Depth (CTD) data collected from the Marine National Facility RV Investigator voyage IN2015_V03 titled: Submesoscale processes - billows and eddies - along the productive shelf by the East Australian Current, departing Brisbane on the 3rd June and arriving in Sydney on the 18th June, 2015. Data for 48 deployments were acquired using the Seabird SBE911 CTD 20, fitted with 24 ten litre bottles on the rosette sampler. The Seabird SBE911 has dual conductivity and temperature sensors. The CTD was additionally fitted with SBE43 dissolved oxygen sensors, fluorometer, transmissometer, PAR sensor and LADCP sensors. These sensors are described in the processing report. The collected data was subsequently processed and archived within the CSIRO Oceans and Atmosphere (O&A) in Hobart. Additional information regarding this dataset may be contained in the Voyage Summary and the CTD Data Processing Report.

  • This record describes the Conductivity-Temperature-Depth (CTD) data collected from the Marine National Facility RV Investigator voyage IN2016_V04, titled: "Influence of temperature and nutrient supply on the biogeochemical function and diversity of ocean microbes." The voyage took place between August 31 and September 22, 2016 departing from Sydney(NSW) and arriving in Brisbane (QLD). Data for 56 deployments were acquired using the Seabird SBE911 CTD 20, fitted with 24 ten-litre bottles on the rosette sampler. The Seabird SBE911 has dual conductivity and temperature sensors. The CTD was additionally fitted with SBE43 dissolved oxygen sensors, fluorometer, transmissometer, PAR sensor and LADCP sensors. These sensors are described in the processing report. The collected data was subsequently processed and archived within the CSIRO Oceans and Atmosphere (O&A) in Hobart. Additional information regarding this dataset may be contained in the Voyage Summary and the CTD Data Processing Report.

  • This record describes the Conductivity-Temperature-Depth (CTD) data collected from the Marine National Facility RV Investigator voyage IN2016_V05, titled: "The Great Barrier Reef as a significant source of climatically relevant aerosol particles." The voyage took place between September 28 and October 24, 2016 departing from Brisbane (QLD) and arriving in Brisbane. Data for 62 deployments were acquired using the Seabird SBE911 CTD 21 and CTD 20, fitted with 24 twelve-litre bottles on the rosette sampler. Seabird-supplied calibration factors were used to compute the pressures and preliminary conductivity values. CSIRO-supplied calibrations were applied to the temperature data. The data were subjected to automated QC to remove spikes and out-of-range values. The final conductivity calibration was based on a single deployment grouping. The final calibration from the primary sensor had a standard deviation (SD) of 0.0014061 PSU, well within our target of ‘better than 0.002 PSU.’ The standard product of 1 dBar-binned averages were produced using data from the primary sensors. The dissolved oxygen data calibration fit had a SD of 0.67142 µM. The agreement between the CTD and bottle data was good. Altimeter, Photosynthetically Active Radiation (PAR) sensor, Colored Dissolved Organic Matter (CDOM) sensor, Fluorometer, Transmissometer, Nephelometer, and Nitrate sensor were also installed on the auxiliary A/D channels of the CTD. The collected data were subsequently processed and archived within the CSIRO Oceans and Atmosphere (O&A) Information and Data Centre (IDC) in Hobart. Additional information regarding this dataset may be contained in the Voyage Summary and the CTD Data Processing Report.