AndreaBozzo/ceres-open-data-index huggingface dataset:
CTD Camera images - collected from the TEMPO voyage of the RV Investigator IN2021_V01

This dataset contains raw seafloor images and associated metadata collected during the 2021 TEMPO voyage in the East Antarctic sector of the Southern Ocean as part of the Marine National Facility RV Investigator research voyage IN2021_V01. The voyage took place from Hobart, Tasmania, to Hobart between 29 January and 24 March 2021 (AEST) under the TEMPO (Trends in Euphausiids off Mawson, Predators, and Oceanography) program.

Most krill research has traditionally focused on the epipelagic zone (surface to ~250 m), although recent observations suggest that krill may also inhabit abyssal environments. To investigate this, a deep-sea camera was mounted to the CTD rosette to observe krill activity near the seafloor during full-depth CTD deployments conducted throughout the voyage.

Seafloor imagery was collected during every full-depth CTD deployment. Images were captured using a Canon HFG10 camera mounted to the CTD frame. The camera and lighting system were activated approximately 25 m above the seafloor during the CTD descent, and still images were recorded every 10 seconds with the focus initially set to infinity. The CTD was then lowered to approximately 3–5 m above the seabed, and after two minutes the focus was adjusted to 1 m.

For each CTD deployment, the highest-quality image(s) have been included in this dataset. Although the vessel remained as stationary as possible during deployments, natural ship movement and motion in the CTD cable caused the camera to capture slightly different sections of the seabed over time.

Organization: Australian Ocean Data Network
Life at Cold Seeps: A Synthesis of Biogeochemical and Ecological Data from Kazan Mud Volcano, Eastern Mediterranean Sea

Recent field observations have identified the widespread occurrence of fluid seepage through the eastern Mediterranean Sea floor in association with mud volcanism or along deep faults. Gas hydrates and methane seeps are frequently found in cold seep areas and were anticipated targets of the MEDINAUT/MEDINETH initiatives. The study presented herein has utilized a multi-disciplinary approach incorporating observations and sampling of visually selected sites by the manned submersible Nautile and by ship-based sediment coring and geophysical surveys. The study focuses on the biogeochemical and ecological processes and conditions related to methane seepage, especially the anaerobic oxidation of methane (AOM), associated with ascending fluids on Kazan mud volcano in the eastern Mediterranean. Sampling of adjacent box cores for studies on the microbiology, biomarkers, pore water and solid phase geochemistry allowed us to integrate different biogeochemical data within a spatially highly heterogeneous system. Geophysical results clearly indicate the spatial heterogeneity of mud volcano environments. Results from pore water geochemistry and modeling efforts indicate that the rate of AOM is 6 mol m-2 year-1, which is lower than at active seep sites associated with conditions of focused flow, but greater than diffusion-dominated sites. Furthermore, under the non-focused flow conditions at Kazan mud volcano advective flow velocities are of the order of a few centimeters per year and gas hydrate formation is predicted to occur at a sediment depth of about 2 m and below. The methane flux through these sediments supports a large and diverse community of micro- and macrobiota, as demonstrated by carbon isotopic measurements on bulk organic matter, authigenic carbonates, specific biomarker compounds, and macrofaunal tissues...

Tags: Earth Sciences, External Publication, Published_External, Scientific Journal Paper, marine, volcanology
Organization: Australian Ocean Data Network
Australia's Maritime Jurisdiction North of 25Â°176S

Map showing all of Australia's Maritime Jurisdiction north of approx 25Â°S .  This includes areas around Cocos (Keeling) Islands and areas west of Christmas Island as well as those contiguous to the continent in the north. 

Included as one of the now 28 constituent maps of the "Australia's Maritime Jurisdiction Map Series" (GeoCat 71789).

Depicting Australia's extended continental shelf approved by the Commission on the Limits of the Continental Shelf in April 2008, treaties and various maritime zones.  Background bathymetry image is derived from a combination of the 2009 9 arc second bathymetry and topographic grid by Geoscience Australia and a grid by W.H.F. Smith and D.T. Sandwell, 1997. Background land imagery derived from Blue Marble, NASA's Earth Observatory.

3277mm x 1050mm (for 42" plotter) sized .pdf downloadable from the web.

Tags: AU-EEZ, Administrative Boundary, Earth Sciences, Published_External, Thematic Map, administrative boundaries, bathymetry, continental shelf, marine, marine jurisdiction
Organization: Australian Ocean Data Network
A new bathymetry compilation for the Cape Darnley region, East Antarctica

We present the first detailed bathymetry compilation for the Cape Darnley region in East Antarctica. This region is of interest in several scientific fields as it is a key location for understanding the Cretaceous breakup of central Gondwana, basins on the continental shelf contain valuable paleoenvironmental records, the shelf is an important marine habitat, and the Cape Darnley polynya is one of only four sites of Antarctic Bottom Water production – a cold, dense, nutrient-rich water mass that forms on the continental shelf and sinks to abyssal depths, driving ocean currents around the world. However, oceanographic and ecosystem models in this region are poorly constrained by lack of detailed bathymetry.

Single beam and multibeam bathymetry datasets were compiled from multiple marine science voyages undertaken over several decades. The data were held by several institutes and were of varying quality. The new dataset improves previous regional bathymetric representations and enables visualization of shelf and slope morphology in unprecedented detail. The compilation provides important baseline information underpinning a range of scientific applications. In particular, the bathymetry provides the first detailed insights into potential bottom water transport pathways from the Cape Darnley polynya into the global deep ocean circulation system. Geomorphic interpretation of the bathymetry data provides insights into past glacial dynamics and contemporary seafloor processes.

Presented at the 2023 POLAR 2018 A SCAR &amp; IASC Conference

Tags: Antarctica, EARTH SCIENCES, Published_External, bathymetry, marine
Organization: Australian Ocean Data Network
Orpheus Island Air Pressure From 08 Nov 2009 To 11 Sep 2017

The 'Wireless Sensor Networks Facility' (formerly known as Facility for The Automated Intelligent Monitoring of Marine Systems (FAIMMS)), part of the Great Barrier Reef Ocean Observing System project (GBROOS), is a facility of the Australian 'Integrated Marine Observing System' (IMOS) project. This data set was collected by the Great Barrier Reef Wireless Sensor Network.

Organization: Australian Ocean Data Network
RV Investigator Voyage IN2018_V04 EM710 MKII Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2018_V04, 'Constraining external iron inputs and cycling in the southern extension of the East Australian Current' which departed Hobart on the 11 September 2018 and returned to Hobart on the 8 October 2018.

The Kongsberg EM710 MKII multibeam echosounder was used to acquire seafloor bathymetry,  backscatter information and watercolumn backscatter data.

The EM710 MKII provides a 0.5° by 1° transmit and receive angular resolution respectively. The echosounder's nominal frequency range is from 40 to 100 kHz.

Data are stored in .all raw format for bathymetry and backscatter and .wcd format for watercolumn backscatter at CSIRO. There are 23 files totalling 11.1 GB of raw data in this dataset.

Sound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in *.all format are corrected for motion and position.

Tide corrections [were/were not] applied to the processed data. Processed data has had outliers removed. Processed line data are available in *.gsf and ascii format, and processed bathymetry and backscatter grids in geotiff format.

Additional information regarding this dataset, including further information on processing streams, is contained in the GSM data acquisition and processing report. Additional data products may be available on request.

Organization: Australian Ocean Data Network
Australia's Maritime Jurisdiction around Tasmania - Mercator projection

Map showing Australia's Maritime Jurisdiction around Tasmania, including South Tasman Rise and Victoria but not Macquarie Ridge. Based on Mercator Projection.
One of the 27 constituent maps of the "Australia's Maritime Jurisdiction Map Series" (GeoCat 71789).
Depicting Australia's extended continental shelf, approved by the Commission on the Limits of the Continental Shelf in April 2008, and various maritime zones.  Background bathymetric image is derived from a combination of the 2009 9 arc second bathymetric and topographic grid by GA and a grid by Smith and Sandwell, 1997.
A0 sized portrait format .pdf downloadable from the web.

Tags: AU-TAS, Administrative Boundary, Earth Sciences, Published_External, Thematic Map, administrative boundaries, bathymetry, continental shelf, marine, marine jurisdiction
Organization: Australian Ocean Data Network
A new bathymetric compilation of the Cape Darnley region, East Antarctica

The Cape Darnley region in East Antarctica has been an area of scientific interest for a variety of disciplines over the last three decades. The recent acquisition of several high-resolution bathymetry datasets enabled the compilation of a detailed regional bathymetry grid. We present a high-resolution bathymetric compilation of the Cape Darnley region in East Antarctica, including areas of the Mac.Robertson Land shelf, slope and adjacent deep sea. A variety of data, single-beam and multibeam swath bathymetry and digitized depths from nautical charts were sourced from numerous institutions. The 100 m-resolution gridded bathymetric dataset improves previous bathymetric representations of the region and enables visualization of the seafloor morphology in unprecedented detail. The bathymetry grid has been constructed using a layered hierarchy approach based on the source of each dataset. This data compilation forms important baseline information for a range of scientific applications and end users including oceanographers, glacial modellers, biologists and geologists. The compilation will aid numerical modelling of ocean circulation, reconstruction of palaeo-ice streams and refinement of ice-sheet models.

Citation: Smith J, Nogi Y, Spinoccia M, Dorschel B, Leventer A. A bathymetric compilation of the Cape Darnley region, East Antarctica. Antarctic Science. 2021;33(5):548-559. doi:10.1017/S0954102021000298

Tags: Cape Darnley, East Antarctica, Mac.Robertson shelf, Marine Geoscience, Published_External, bathymetric mapping, data compilation, multibeam echosounder
Organization: Australian Ocean Data Network
Seabed gravel, mud and sand content in the Browse region in the Australian continental EEZ 2014

This dataset provides the spatially continuous data of seabed gravel (sediment fraction &gt;2000 Âµm), mud  (sediment fraction &lt; 63 Âµm) and sand content (sediment fraction 63-2000 Âµm) expressed as a weight percentage ranging from 0 to 100%, presented in 0.0025 decimal degree (dd) resolution raster grids format and ascii text file. 

The dataset covers the Browse region in the Australian continental EEZ.

This dataset supersedes previous predictions of sediment gravel, mud and sand content for the basin with demonstrated improvements in accuracy. Accuracy of predictions varies based on density of underlying data and level of seabed complexity. Artefacts occur in this dataset as a result of insufficient samples in relevant regions. This dataset is intended for use at the basin scale. The dataset may not be appropriate for use at smaller scales in areas where sample density is insufficient to detect local variation in sediment properties. To obtain the most accurate interpretation of sediment distribution in these areas, it is recommended that additional samples be collected and predictions updated.

Tags: Environmental Science and Management, GIS Dataset, Published_External, marine
Organization: Australian Ocean Data Network
Videos and still images from TAN0713 (Eastern Australian Margin)

The Eastern Margin survey (TAN0713, GA survey #2436) to the Capel and Faust basins and Gifford Guyot was conducted on the Tangaroa between 7 October and 22 November 2007 in collaboration with staff from New Zealand's National Institute of Water and Atmospheric Research (NIWA), Fugro Robertson Inc., and the University of the Sea. The voyage was operated through the Offshore Energy Security Program, with the principal aims of exploring deep-sea habitats and processes on a subsided marginal plateau and submerged guyot and examining the underlying geology as an assessment for petroleum potential of the basins. A total of 42 video transects (each approx. 1 hr in duration) were surveyed and 6,229 still photographs acquired in water depths of 259-2,260 m. Video footage was recorded on mini DV tapes, and copied to digital format. Video snippets were also created of representative habitats for some stations. Video and image files or associated parent folders are named according to station number, followed by CAM and then the deployment number. For example 37CAM35 represents a video transect from Station 37 that was the 35th video transect on the survey. For further information on this survey please refer to the post-survey report (GA Record 2009/22 - Geocat #68630) and GA Record 2009/26 (Geocat #69358).

Tags: Earth Sciences, HVC_144640, Multimedia, Published_External, marine
Organization: Australian Ocean Data Network
Influence of Climate Fluctuations and Changes in Catchment Land Use on Late Holocene and Modern Beach-ridge Sedimentation on a Tropical Macrotidal Coast: Keppel Bay

Beach ridges at Keppel Bay, central Queensland, Australia, preserve a record of sediment accumulation from the historical period back to middle Holocene times. The ridges comprise fine, well-sorted, feldspar-rich quartz sand that was eroded from the Fitzroy River catchment, deposited in Keppel Bay during floods of the Fitzroy River, and reworked onshore into beach and foredune deposits by the prevailing currents, waves and wind. These floods have an average recurrence interval of at least 7 yr and are induced by the passage of cyclones onshore into the large Fitzroy catchment. The youngest series of beach ridges sit sub-parallel to the modern beach and comprise six accretional units, each unit formed by a set of ridges and delineated by prominent swales. Optically stimulated luminescence (OSL) ages of beach ridges in these units indicate they were deposited in periods of rapid progradation approximately 1500, 1000, 450 and 230 yr BP, when there was an enhanced supply of sediment to the beach from the Fitzroy River via Keppel Bay. Estimates of the mass of sediment stored in the beach-ridge strandplain show that it represents a significant sediment store, potentially trapping the equivalent of 79% of the estimated long-term (100 yr) average annual bedload of the Fitzroy River that is deposited in Keppel Bay. There has been a reduction in the rate of sediment accumulation in the strandplain since around 1000 yr BP, which is consistent with other coastal records in eastern Australia of a relatively wetter phase of climate in the late Holocene compared to the present. The youngest beach ridges (OSL ages &lt; 100 yr BP) are tall relict foredunes that reflect a low rate of sediment accumulation. These ridges have a distinctive trace-element composition produced by a greater contribution from catchment areas with basaltic soils. The change in catchment provenance has likely been a consequence of erosion that followed clearing of native vegetation in these areas. Our findings demonstrate the important insights that beach-ridge deposits proximal to a river sediment source can provide into processes of sediment accumulation and the response to variations in climate in tropical coastal sedimentary systems.

Tags: AU-QLD, Earth Sciences, External Publication, Published_External, Scientific Journal Paper, climate, coasts, marine, palaeoclimatology, stratigraphy
Organization: Australian Ocean Data Network
Bass Strait And Encounter Bay Aeromagnetic Survey, 1960-1961 By Haematite Explorations Proprietary Limited

This report refers to an offshore aeromagnetic survey over the continental shelf of south-eastern Australia, from Gippsland in the east, through Bass Strait, to Encounter Bay and Kangaroo Island in the west. The survey was carried out for Haematite Explorations Proprietary Limited by Aero Service Limited during the period 17th September to 21st December, 1961. A previous reconnaissance aeromagnetic survey carried out by the same contractor over Bass Strait in December, 1960, had indicated the existence of deep Tertiary-Mesozoic sedimentary basins.

The objective of the later survey was to delineate these basins and to extend the investigation farther westward with a view to selecting areas for marine seismic surveys. 17,945 miles of aeromagnetic traverse were flown and the results of the operation are presented as contoured maps of total magnetic field intensity and of interpreted basement depth.

As a result of the survey, several areas of deep sedimentation were delineated in sufficient detail to allow for the planning of subsequent investigation by marine seismic surveys.

Tags: Earth Sciences, GA Publication, Other Publication, Published_External, petroleum exploration
Organization: Australian Ocean Data Network
National Gravity Compilation 2019 includes airborne  - CSCBA 0.5VD image

Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. 
This National Gravity Compilation 2019 includes airborne  - CSCBA 0.5VD image is derived from the 2019 Australian National Gravity Grids B series. These gravity data were acquired under the project No. 202008. The grid has a cell size of 0.00417 degrees (approximately 435m). This gravity anomaly grid is derived from ground observations stored in the Australian National Gravity Database (ANGD) as at September 2019, supplemented by offshore data sourced from v28.1 of the Global Gravity grid developed using data from the Scripps Institution of Oceanography, the National Oceanic and Atmospheric Administration (NOAA), and National Geospatial-Intelligence Agency (NGA) at Scripps Institution of Oceanography, University of California San Diego. Airborne gravity and gravity gradiometry data were also included to provide better resolution to areas where ground gravity data was not of a suitable quality. Out of the approximately 1.8 million gravity observations, nearly 1.4 million gravity stations in the ANGD together with Airborne Gravity surveys totaling 345,000 line km and 106,000 line km of Airborne Gravity Gradiometry were used to generate this grid. The ground and airborne gravity data used in this grid has been acquired by the Commonwealth, State and Territory Governments, the mining and exploration industry, universities and research organisations from the 1940's to the present day. Station spacing varies from approximately 11 km down to less than 1 km, with major parts of the continent having station spacing between 2.5 and 7 km. Airborne surveys have a line spacing ranging from 0.5 km to 2.5 km. Terrain corrections to gravity were calculated using both offshore bathymetry and onshore topography data. The image shows a half vertical derivative of the complete Bouguer anomalies (B series) over Australia and its continental margins. A half vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the complete spherical cap Bouguer anomaly grid of the 2019 Australian National Gravity Grids B series.

Tags: 05vd, Airborne, Australia, B series, Bouguer, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, None, Published_External, complete, geophysical survey, geophysics, gradiometry, grav, gravity, grid, ground digital data, image, marine, raster, satellite, spherical cap, survey 202008
Organization: Australian Ocean Data Network
Remotely Sensed Seasonal Shoreward intrusion of the East Australian Current: Implications for Coastal Ocean Dynamics

The East Australian Current (EAC) onshore encroachment drives coastal upwelling and shelf circulations, changes slope-shelf bio-physical dynamics, and consequently exerts significant influence on coastal marine ecosystem along the south-eastern Australian margin. The EAC is a highly dynamic eddy-current system which exhibits high-frequency intrinsic fluctuations and eddy shedding. As a result, low-frequency variability in the EAC is usually overshadowed and rarely detectable. For decades, despite many efforts into the ocean current observations, the seasonality of EAC’s shoreward intrusion remains highly disputable. In this study, for the first time we use a long-term (26 years) remotely sensed AVHRR Sea Surface Temperature (SST) dataset spanning 1992-2018 to map the EAC off the coast of northern New South Wales (NSW), between 28°S - 32.5°S. A Topographic Position Index (TPI) image processing technique was applied to conduct the quantitative mapping. The mapping products have enabled direct measurement (area and distance) of the EAC’s shoreward intrusion. Subsequent spatial and temporal analyses have shown that the EAC move closer to the coast in austral summer and autumn than in austral winter, with the mean distance-to-coast ~6 km shorter and occupying the shelf area ~12% larger. This provides quantitative and direct evidence of the seasonality of the EAC’s shoreward intrusion. Such seasonal migration pattern of the EAC thus provides new insights into the seasonal upwelling and shelf circulations previously observed in this region. As a result, we were able to confirm that the EAC is a driving force of the seasonal ocean dynamics for the northern NSW coast.

Tags: EARTH SCIENCES, New South Wales - NSW, Published_External, coastal upwelling, quantitative mapping, satellite remote sensing, shelf circulation, spatial analysis, the East Australian Current - EAC
Organization: Australian Ocean Data Network