Seamounts, Canyons and Reefs of the Coral Sea bathymetry survey (FK200802/GA0365)  

Authors / CoAuthors

Brooke, B. | Nichol, S. | Beaman, R. | Spinoccia, M.

Abstract

This resource includes bathymetry data acquired during the Seamounts, Canyons and Reefs of the Coral Sea bathymetry survey using Kongsberg EM302 and EM710 multibeam sonar systems. The Seamounts, Canyons and Reefs of the Coral Sea bathymetry survey was led by Dr. Brendan Brooke and Dr. Scott Nichol (Geoscience Australia) with a team of scientists from Geoscience Australia, James Cook University, The University of Sydney, University of Tasmania, University of Wollongong, Queensland Museum and Parks Australia aboard the Schmidt Ocean Institute (SOI) RV Falkor from the 2nd to the 30th of August 2020. The primary objective of the survey to collect and analyze geological and biological data of the outer, deep-water edge of the Great Barrier Reef and platform reefs in the adjacent Coral Sea Marine Park. R/V Falkor’s multibeam systems were used to map the structure of the reefs, canyons, and seamounts, illuminating their formative processes. The datasets acquired will greatly improve understanding of the sedimentary processes that influence biodiversity patterns, including how canyons and platform reefs may provide a pathway for sediment to travel from coastal and shelf water to deep filter feeders. The deep and irregular canyon and platform-reef topography likely leads to direct upwelling of nutrient-rich deep waters. This dataset contains a 64m and a 16m, for water depths shallower than 2560m, resolution 32-bit geotiff of the Seamounts, Canyons and Reefs of the Coral Sea survey area produced from the processed EM302 and EM710 bathymetry data combined. This dataset is not to be used for navigational purposes. This dataset is published with the permission of the CEO, Geoscience Australia.

Product Type

dataset

eCat Id

144385

Contact for the resource

Digital Object Identifier

https://dx.doi.org/10.26186/144385

Keywords

theme.ANZRC Fields of Research.rdf

• EARTH SCIENCES

( {1} )

• HVC_144641

( Theme )

• Marine

( {1} )

• Bathymetry

( Instrument )

• Multibeam

( Product )

• Bathymetric grids

( Project )

• AusSeabed

( {1} )

• Marine Data

( {1} )

• Published_External

Publication Date

2020-12-06T23:49:13

Creation Date

Security Constraints

Australian Government Security ClassificationSystem    

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence    

Access - license

Use - license

Status

completed

Purpose

bathymetry survey

Maintenance Information

asNeeded

Topic Category

geoscientificInformation

Series Information

Lineage

For V1 - Vertical Datum: MSL and Ellipsoid - Horizontal Datum: WGS84 (epsg-4326) Processing methodology: This dataset was produced using CARIS HIPS/SIPS v.11.3.7 and AusSeabed processing methodology as follows: 1. A new Caris project was created in conjunction with existing or newly created vessel configuration file(s). 2. The raw swath sonar data files were imported to the project. GGK is the preferred navigation and ellipsoid height source. 3. The POSMV data files were imported to the project to bring in delayed heave, delayed heave RMS, ellipsoid height and ellipsoid height RMS. 4. TPU and GPS tide were computed and all data were georeferenced (merged) to ellipsoid vertical datum. 5. A CUBE surface was generated as a reference surface for data cleaning. 6. An automated data cleaning using the surface cleaning method with the reference surface was undertaken. 7. The final grid was produced at a single resolution for the entire depth range according to the deepest depth. 8. The second grid was produced by shifting to EGM2008. 9. The final processed grids were exported as a 32-bit floating point Geotiffs at 64m resolution, referenced to ellipsoid and EGM2008. For V2 - Vertical Datum: EGM2008 - Horizontal Datum: WGS84 (epsg-4326) Processing methodology (in addition to what was applied in V1): 1. EGM2008 vertical datum was applied to the data. 2. Close inspection and manual filtering of noise 3. Two grids were produced. A 64 m grid and 16 m grid. The 64 m grid includes the whole dataset minus suppressed noise. The 16 m grid only includes depths of 2560 m and shallower to maintain consistent coverage and provides a higher resolution image of the seabed

Parent Information

Extents

[-27.00, -13.00, 145.00, 154.00]

Reference System

WGS 84 (EPSG:4326)

Spatial Resolution

64m

Service Information

Associations

Downloads and Links

Coral Sea Canyons and Reef Bathymetry 2020 16m - 64m (zip) [14.9 MB]  

Source Information