AndreaBozzo/ceres-open-data-index huggingface dataset:
Summary Of Data And Results Bass Basin, Tasmania Esso Bass No. 1 And No. 2 Wells Of Esso Exploration And Production Australia Inc. (Formerly Esso Exploration  Australia Inc.)

Esso Bass No. 1 Well was drilled by Global Marine Australasia pty Ltd. using "Glomar Ill", for Esso Exploration Australia Inc., in Tasmanian waters of the offshore Bass Basin. about 88 miles east of King Island. The well was spudded on 21 July 1965, reached total depth of 7717 feet on 8 September. and was plugged and abandoned on 14 September 1965. A full programme of logging and coring was undertaken.

The Bass Basin, lying entirely between Victoria and Tasmania, covers an area of approximately 25.000 square miles. From magnetic data. it was inferred to contain a thick sedimentary section; from seismic data and extrapolated regional geology. The sedimentary section was thought to include Tertiary sediments favourable for petroleum generation and accumulation. The well was thus designed to gain stratigraphic information on the Tertiary and upper part of the Mesozoic sedimentary section in the
north central Bass Basin. and. in particular. to test the petroleum potential of a postulated reef-type anomaly in the Miocene section.

Tags: AU-TAS, Earth Sciences, GA Publication, Other Publication, Published_External, petroleum exploration
Organization: Geoscience Australia Data
AHO Reference Surfaces Darwin 0.5m 2023 (20230012R)

The Darwin Reference Surfaces bathymetry survey was acquired for the Australian Hydrographic Office (AHO) on 8 Jul 2020. This surface was created from a contracted national reference survey in Darwin NT, collected for the purpose of calibrating multibeam echosounders.&nbsp;It was conducted for the Australian Hydrographic Office as part of the Hydroscheme Industry Partnership Program, acquired using R2Sonic 2026 and R2Sonic 2024, and processed using QPS Qimera. Separate grids in 0.5m resolution are provided for the two surveyed sites within this survey area in MSL, LAT and Ellipsoid vertical datum. The dataset was then exported as a 0.5m resolution, 32 bit floating point GeoTIFF grid of the survey area.

This dataset is not to be used for navigational purposes.

Tags: AusSeabed, EARTH SCIENCES, Earth Science | Oceans | Bathymetry/Seafloor Topography | Bathymetry, HVC_144641, Oceans, Published_External, bathymetric grids, bathymetry, marine, multibeam
Organization: Geoscience Australia Data
Palynological report on South Pacific Pty Ltd (Birkhead) well

An examination of twenty-two samples, chiefly cuttings, from S.P.L. No.1 (Birkhead) well has suggested that the Permian - Triassic boundary lies at a depth between 3600 and 3700 feet below ground level, that a marine influence in Upper Permian times was present and that possibly a somewhat older unit than Upper Permian was present at 5000 feet. No evidence for the age of strata above 1900 feet and below 5035 feet is offered.

Tags: AU-QLD, Earth Sciences, GA Publication, Published_External, Record
Organization: Geoscience Australia Data
Disturbance of Intertidal Sediments: The Response of Bacteria and Foraminifera

Incubation experiments are common in marine experimental studies but the impact on organisms and geochemical parameters is poorly understood. Here, the re-establishment of vertical bacterial and foraminiferal zonation in intertidal sediments was studied after sieving and subsequent incubation of sediment. Living (Rose Bengal stained) foraminifera were counted and redox sensitive elements in the pore water were measured using a voltammetric microelectrode. Bacterial abundances were quantified using phospholipid derived fatty acid (PLFA) methyl esters in the range of C12-C22 released from intact phospholipids.

Foraminifera appeared to be predominantly dependent on the presence of oxygen; they re-migrated to the top oxygenated 3 mm of the sediment within 21 days. Total bacterial abundance did not re-establish to original levels even after 49 days. Total fatty acid concentration increased to a depth of at least 70 mm in the field, but decreased with depth in the sieved sediments of the microcosms. This difference is attributed to macrobenthic activity and physical mixing in the field, causing an increased downward flux of electron acceptors (O2, NO3-, Mn(IV), Fe(III)) which is essential for dissimilatory processes at some centimetres depth. In the experimental microcosms, where macrobenthos was removed by sieving, foraminifera alone were not capable of this sediment mixing. The relative amounts of the individual PLFAs were constant with depth, which indicates that no differentiation with depth of the bacterial population by means of bacterial PLFAs could be established both in the field and in the experimental situation. The artificial disturbance led to a long-term change in the vertical bacterial distribution, which was not re-established during the incubation time of 49 days.

Tags: Earth Sciences, External Publication, Published_External, Scientific Journal Paper, marine
Organization: Geoscience Australia Data
Temporary Work (skilled) visa program

Statistical data is available on the subclasses 457 and 482 and provides information on all visa grants and the number of visa holders in Australia. 

For visa holders, the dimensions include the snapshot dates, the gender and citizenship country of the visa holder, the nominated occupation and nominated position location of the primary visa holder and the industry of the employer that is sponsoring the primary visa holder. 

For visa grants, the dimensions include the financial year and quarter of visa grant, the gender, age and citizenship country of the visa holder, the nominated occupation of the primary visa holder and the industry of the employer that is sponsoring the primary visa holder.

These de-identified statistics are periodically checked for privacy and other compliance requirements. The statistics were temporarily removed in March 2024 in response to a question about privacy within the emerging technological environment. Following a thorough review and risk assessment, the Department of Home Affairs has republished the dataset.

These reports are released on a quarterly basis.

Tags: Subclass 457, Temporary Work, visa grants, visa holders, visas granted
Organization: Department of Home Affairs
Working Holiday Maker visa program

Statistical data is available on the Working Holiday Maker visa program and provides information on visa grants recorded for the Working Holiday visa (subclass 417) and the Work and Holiday visa (subclass 462) in the current and previous financial years. The dimensions include the financial year and quarter of visa grant, the gender, age and citizenship country of the visa holder. 

These de-identified statistics are periodically checked for privacy and other compliance requirements. The statistics were temporarily removed in March 2024 in response to a question about privacy within the emerging technological environment. Following a thorough review and risk assessment, the Department of Home Affairs has republished the dataset.

This report is released on a quarterly basis.

Tags: Work and Holiday, Working Holiday, Working Holiday Maker, subclass 417, subclass 462
Organization: Department of Home Affairs
Image Collection - RV Investigator Voyage IN2023_V01 - Antarctic Bottom Water production in the past: Records from marine sediments, Cape Darnley, East Antarctica

This data set contains the imagery collected on the Marine National Facility (MNF) RV Investigator voyage IN2023_V01, titled "Antarctic Bottom Water production in the past: Records from marine sediments, Cape Darnley, East Antarctica." The voyage took place between January 25, 2023 and March 2, 2023 (AEST), departing from Fremantle and returning to Hobart, collecting imagery of benthic habitats together with oceanographic data.

Instrument(s) used to collect this data:
MNF Deep Towed camera (DTC)

Datasets include: 
Video (oblique forward view)
Stereo stills (oblique forward view)
Navigational data

Organization: CSIRO Marlin Data Catalogue
IMOS - Ships of Opportunity - Sea Surface Temperature Data collected on the Merchant Vessel Portland

This dataset contains Sea Surface Temperature (SST) underway observations collected on trips of a merchant vessel (MV Portland - VNAH ) between Fremantle (Western Australia) and Melbourne (Victoria).

The data have been quality controlled by the Bureau of Meteorology.

The Ships of Opportunity (formerly known as Enhancement of Measurements on Ships of Opportunity (SOOP)) - Sea Surface Temperature (SST) Sub-Facility aims to supply near real-time SST data (within 24 hours) from ships of opportunity and research vessels in the Australian region.

Tags: Atmosphere | Atmospheric Pressure | Atmospheric Pressure, Atmosphere | Atmospheric Temperature | Air Temperature, Atmosphere | Atmospheric Water Vapor | Dew Point, Coastal Cities / Towns (Australia) | Adelaide, SA, Coastal Cities / Towns (Australia) | Bunbury, WA, Coastal Cities / Towns (Australia) | Fremantle, WA, Coastal Cities / Towns (Australia) | Melbourne, VIC, Global / Oceans | Indian Ocean, Global / Oceans | Southern Ocean, Oceans | Ocean Temperature | Sea Surface Temperature, Oceans | Ocean Winds | Surface Winds, States, Territories (Australia) | South Australia, States, Territories (Australia) | Victoria, States, Territories (Australia) | Western Australia, air_pressure, air_temperature, latitude, longitude, platform_speed_wrt_ground, sea_surface_temperature, wind_from_direction, wind_speed
Organization: Australian Ocean Data Network
Variability of the Antarctic Slope and Coastal Currents

The Antarctic Slope and Coastal Currents are key ocean circulation features around the Antarctic margin, driving the transport of heat, salt and nutrients around the continent.  They are also coupled to the hydrography of the region, where in certain locations around Antarctica, the weakening of these currents facilitate the cross-slope transport of warm water onto the continental slope, inducing basal melt of ice shelves and increasing glacial and ice sheet flow, resulting in global sea level rise. However, a lack of observations in this remote region limits our understanding of these current systems.  This work examined the dynamics of the Antarctic Slope and Coastal Currents, which shed new light on their temporal and spatial variability and has implications on their roles in the climate system. 

In Part I of this work we examined an intrinsic variability in warm water intrusions on the Antarctic continental slope through canyons, with narrower canyons resulting in more irregular intrusions in an idealised channel ocean model.  Using dynamical systems theory we found that this intrinsic variability arises from the Antarctic Slope Current, driven by feedbacks between eddy generation and surface wind stress input. 

In Part 2 of this work we compared eddy and current velocities across a 1/10 degree and 1/20 degree regional ocean-sea ice model, showing that eddy activity is more than doubled in the 1/20 degree model than the 1/10 degree model, with minimal differences in current velocities.  Eddy activity and coastal current velocities were found to exhibit a hysteresis loop with sea ice, with sea ice growth leading a dampening of eddy activity and current velocities, a feature more strongly represented in the higher resolution model. 

In Part III of this work modelled Antarctic Slope Current changes under a transient meltwater perturbation were investigated, representative of projected meltwater inputs under climate change.  The Antarctic Slope Current increases non-linearly over time as more meltwater is added around Antarctica, with an increased acceleration towards the middle of the 21st century.  The non-linear acceleration is attributed to a strengthened salinity gradient across the continental slope, driven by poleward shifting warm waters.  This work provides new dynamical insight into the variability of these circulation features, but also motivates further investigation into these emergent phenomena to better understand their impact on our changing Antarctic climate.

Tags: Antarctic marginal ocean, geophysical fluid dynamics, ocean modelling
Organization: Australian Ocean Data Network
Popup satellite archival tag (PSAT) time series of skates caught around Heard Island

Time series dataset of depth and activity recorded by miniPAT (Wildlife computers) popup satellite archival tags deployed on Kerguelen sandpaper skates (Bathyraja irrasa, n=24) caught in the Patagonian toothfish longline fishery in Heard Island and McDonald Islands.

Tags were deployed to assess the post-release survival of skates in the fishery.

Tags: Bathyraja irrasa, Benthic, Bycatch, Elasmobranch, MiniPAT, Mortality, PSAT, Post-release survival, Skate, Telemetry
Organization: Australian Ocean Data Network
Ecophysiology of three habitat-forming seaweeds across a depth and latitudinal gradient in southeastern Australia

Seasonal patterns in the in situ ecophysiology of the common habitat-forming seaweeds Ecklonia radiata, Phyllospora comosa, and Macrocystis pyrifera were investigated at different latitudes and depths in southeastern Australia. We used multiple performance indicators (photosynthetic characteristics, pigment content, chemical composition, stable isotopes, nucleic acids) to assess the ecophysiology of seaweeds near the northern and southern margins of their range, along a depth gradient (E. radiata only), over a two year period (September 2010 – August 2012).

Tags: Ecklonia radiata, HPLC, Macrocystis pyrifera, PAM fluorometry, Phyllospora comosa, RNA:DNA, Temperate Reef, ecophysiology, fucoxanthin, kelp, mass spectrometry, nucleic acid
Organization: Australian Ocean Data Network
IMOS - Ships of Opportunity - Sea Surface Temperature data collected on the Merchant Vessel Fantasea Wonder (Whitsundays Ferry)

This dataset contains Sea Surface Temperature (SST) underway observations collected on trips of the Merchant Vessel Fantasea Wonder (callsign: VJQ7467) between Shute Harbour and Hardy Reef.

Data available from the vessel are skin and bulk SST from two types of sensors.

The Ships of Opportunity (formerly known as Enhancement of Measurements on Ships of Opportunity (SOOP)) - Sea Surface Temperature (SST) Sub-Facility aims to supply near real-time SST data (within 24 hours) from ships of opportunity and research vessels in the Australian region. 

Observed data are retrieved from the vessel once a day around 6pm and quality controlled at the Bureau of Meteorology. A daily file of 1-minute averages of the observations is generated around 0900 UTC and provided to eMII.

Tags: Marine Features (Australia) | Great Barrier Reef, QLD, Oceans | Ocean Temperature | Sea Surface Temperature, Regional Seas | Coral Sea, sea_surface_temperature
Organization: Australian Ocean Data Network
Data accompanying: Adjustments in fatty acid composition is a mechanism that can explain resilience to marine heatwaves and future ocean conditions in the habitat-forming seaweed Phyllospora comosa

Marine heatwaves are extreme events that can have profound and lasting impacts on marine species. Field observations have shown seaweeds to be highly susceptible to marine heatwaves, but the physiological drivers of this susceptibility are poorly understood. Furthermore, the effects of marine heatwaves in conjunction with ocean warming and acidification are yet to be investigated. To address this knowledge gap, we conducted a laboratory culture experiment in which we tested the growth and physiological responses of Phyllospora comosa juveniles from the southern extent of its range (43 - 31° S) to marine heatwaves, ocean warming and acidification. We used a "collapsed factorial design" in which marine heatwaves were superimposed on current (today's pH and temperature) and future (pH and temperature projected by 2100) ocean conditions. Responses were tested both during the heatwaves, and after a seven-day recovery period. Heatwaves reduced net photosynthetic rates in both current and future conditions, while respiration rates were elevated under heatwaves in the current conditions only. Following the recovery period, there was little evidence of heatwaves having lasting negative effects on growth, photosynthesis or respiration. Exposure to heatwaves, future ocean conditions or both caused an increase in the degree of saturation of fatty acids. This adjustment may have counteracted negative effects of elevated temperatures by decreasing membrane fluidity, which increases at higher temperatures. Furthermore, P. comosa appeared to down-regulate the energetically expensive carbon-concentrating mechanism (CCM) in the future conditions with a reduction in δ13 C values detected in these treatments. Any saved energy arising from this down-regulation was not invested in growth and was likely invested in the adjustment of fatty acid composition. This adjustment is a mechanism by which P. comosa and other seaweeds may tolerate the negative effects of ocean warming and marine heatwaves through benefits arising from ocean acidification.

Tags: Fatty acids, Global ocean change, Marine heatwaves, Multiple physiological parameters, Ocean acidification, Ocean warming, Physiology, Seaweed, pH measurements
Organization: Australian Ocean Data Network
Antarctic sea ice diatom Nitzschia sp.

This dataset includes the genome assembly and predicted proteome of an Antarctic sea-ice diatom, Nitzschia sp. (most likely Nitzschia stellata). It also contains the endogenous viral element (EVE) sequences identified within this diatom genome, as well as the results of comparative genomic analyses between Antarctic sea-ice diatoms and non-polar diatoms. The Nitzschia sp. genome assembly was obtained through metagenomic binning of Antarctic sea-ice samples.

Tags: genome, proteome
Organization: Australian Ocean Data Network
Phase-shift dynamics of sea urchin overgrazing on nutrified reefs

Shifts from productive kelp beds to impoverished sea urchin barrens occur globally and represent a wholesale change to the ecology of sub-tidal temperate reefs. Although the theory of shifts between alternative stable states is well advanced, there are few field studies detailing the dynamics of these kinds of transitions. In this study, sea urchin herbivory (a ‘top-down’ driver of ecosystems) was manipulated over 12 months to estimate (1) the sea urchin density at which kelp beds collapse to sea urchin barrens, and (2) the minimum sea urchin density required to maintain urchin barrens on experimental  reefs in the urbanised Port Phillip Bay, Australia. In parallel, the role of one of the ‘bottom-up’ drivers of ecosystem structure was examined by (3) manipulating local nutrient levels and thus attempting to alter primary production on the experimental reefs. It was found that densities of 8 or more urchins m-2 (≥ 427 g m-2 biomass) lead to complete overgrazing of kelp beds while kelp bed recovery occurred when densities were reduced to ≤ 4 urchins m-2 (≤ 213 g m-2 biomass). This experiment provided further insight into the dynamics of transition between urchin barrens and kelp beds by exploring possible tipping-points which in this system can be found between 4 and 8 urchins m-2 (213 and 427 g m-2 respectively). Local enhancement of nutrient loading did not change the urchin density required for overgrazing or kelp bed recovery, as algal growth was not affected by nutrient enhancement.

Tags: ARTIFICIAL REEFS, ECKLONIA RADIATA, HELIOCIDARIS ERYTHROGRAMMA, KELP BED COLLAPSE, KELP BED RECOVERY, PORT PHILLIP BAY, AUSTRALIA, REGIME-SHIFT, TEMPERATE ROCKY REEFS, Temperate Reef
Organization: Australian Ocean Data Network
Franklin and Zeehan Marine Park fine-scale seafloor substrate mapping

Fine-scale bathymetry mapping was conducted in the Franklin and Zeehan Australian Marine Parks (AMPs) located off the west coast of Tasmania, Australia. The primary objective of this mapping exercise was to map seafloor features of the shelf areas of these AMPs for the first time and to understand the distribution of benthic habitats and key sessile invertebrate species within these areas.

Characterisation of the seafloor was undertaken in two phases. The first stage used multibeam sonar to comprehensively map the study areas, extracting bathymetry and backscatter products. This was followed by extensive ground validation undertaken by a panoramic stereo drop-camera system that also recorded the presence of dominant sessile invertebrate fauna as well as benthic/demersal fish species.

This record describes and provides data access to the fine-scale substratum mapping extracted from the combination of multibeam bathymetry and video ground-truthing data. Access to the (1) bathymetry survey data; and (2) annotated seafloor imagery, are provided through the 'Download and Links' section of this record.

Tags: BF2022_v01, Habitat mapping, Marine Parks, Multibeam sonar, Substrate classification
Organization: Australian Ocean Data Network
Gridded SAM and ENSO coefficients derived from satellite altimeter data over the Antarctic Ice Sheet, 2002-2020

The data result from an analysis of gridded satellite altimetry time series of ice surface elevation for the Antarctic Ice Sheet.  Multiple linear regression is performed, including parameters associated with the cumulative sum of each of the Southern Annular Mode (SAM) and El Nino/Southern Oscillation (ENSO).  The gridded data include the original data and the derived parameters and statistical values. Four grids are provided.  Two grids are from separate regressions performed on data after applying one of two different spatial smoothing filters (10 km and 200 km Gaussian functions).  Two further grids are from regressions after subtracting one of two firn densification models from the 10 km-smoothed altimetry data.

Tags: El Nino Southern Oscillation (ENSO), GRACE gravimetry, Southern Annular Mode (SAM), ice, ice sheet, satellite altimetry
Organization: Australian Ocean Data Network
Condition of rocky reef communities around Tasmania: algal surveys

The data is the percent algal cover derived from underwater visual census methods involving transect counts at rocky reef sites around Tasmania. This data forms part of a larger dataset that also surveyed fish and megafaunal invertebrate abundance for the area. The aggregated dataset allows examination of changes in Tasmanian shallow reef floral and faunal communities over a decadal scale - initial surveys were conducted in 1992-1995, and again at the same sites in 2006-2007. There are plans for ongoing surveys.

An additional component was added in the latter study - a boat ramp study looking at the proximity of boat ramps and their effects of fishing. We analysed underwater visual census data on fishes and macroinvertebrates (abalone and rock lobsters) at 133 shallow rocky reef sites around Tasmania that ranged from 0.6 - 131 km from the nearest boat ramp. These sites were not all the same as those used for the comparison of 1994 and 2006 reef communities. The subset of 133 sites examined in this component consisted of only those sites that were characterized by the two major algal (kelp) types (laminarian or fucoid dominated). Sites with atypical algal assemblages were omitted from the 196 sites surveyed in 2006. 

This study aimed to examine reef community data for changes at the community level, changes in species richness and introduced species populations, and changes that may have resulted from ocean warming and fishing.

The methods are described in detail in Edgar and Barrett (1997). Primarily the data are derived from transects at 5 m depth and/or 10 m depth at each site surveyed. The underwater visual census (UVC) methodology used to survey rocky reef communities was designed to maximise detection of (i) changes in population numbers and size-structure (ii) cascading ecosystem effects associated with disturbances such as fishing, (iii) long term change and variability in reef  assemblages.

Tags: Temperate Reef
Organization: Australian Ocean Data Network