Alldata:DBSEABED

DBSEABED dataset information page

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Short Description

File:Gomex dbSBD CSDMS Aug2024.zip

dbSEABED Griddings for Gulf of Mexico Jun2024

Statement: dbSEABED Gridded Data Release: Gulf of Mexico

Abstract: [[Extended data description::dbSEABED is a data system that describes the material properties of the seabed. It holds data describing over 6 million seafloor sites for the world ocean seafloor. It deals with the sediment textures, strengths and porosities, organic carbon and carbonate compositions, color, mesoscale features, and grain components of the seafloor. dbSEABED extends from shoreline and continental shelf to the abyssal floor, and addresses terrigenous, volcanic and biogenic materials in their rock and sediment forms. By using diverse forms of data, collection and study biases are minimized.

The project supplies gridded outputs suitable for use in numerical models. The basic set of gridded parameters is: gravel, sand, mud (%), rock exposure (%), average grainsize and sorting (phi), carbonate and organic carbon (%), color red/green ratio. A specification of the parameters is given at [1], usSEABED, and other web pages and in publications.

At this web site, example gridded outputs are served for the Gulf of Mexico. Serving is done either using BMI dbSEABED or the zipFile (below).

The cell resolution is 0.05 degrees in latitude/longitude projection, using the WGS84 spheroid. Computed griddings of the Standard Uncertainties accompany all the parameter value griddings. Other grid details: ncols 360; nrows 260; cell-centre values; NODATA_value -99. In the file names: 'proj' signifies the project map extent; 'selvg' the map area plus border; 'wiPnts' with point data distribution; 'idw3d' interpolation using the dbSEABED 3D Inverse Distance Weighted method (see dbSEABED documentation). The method uses water depths as well as spatial distances as the interpolation distance metric. Additional steps in the process ensure adequate coastal/inshore data representation and directionally balanced data inputs at each cell. Griddings of the Standard Uncertainty (SU) accompany each value gridding and are available on request.

Data products at higher resolution, for different map bases, and for other parameters are available from chris.jenkins@colorado.edu the author.

Gulf of Mexico dbSEABED Data (Version: August2024):

Parameter	Data example
Gravel Fraction (%) - Surficial Seafloor, computed with Compositional Data (CODA) methods	Gridded coverage of values	Spatial distribution of supporting data
Sand Fraction (%) - Surficial Seafloor, computed with Compositional Data (CODA) methods	Gridded coverage of values	Spatial distribution of supporting data
Mud Fraction (%) - Surficial Seafloor, computed with Compositional Data (CODA) methods	Gridded coverage of values	Spatial distribution of supporting data
Carbonate Content (%) - Surficial Seafloor	Gridded coverage of values	Spatial distribution of supporting data
Organic Carbon Content (%) - Surficial Seafloor	Gridded coverage of values	Spatial distribution of supporting data
Sediment Grainsize (phi) - Surficial Seafloor	Gridded coverage of values	Spatial distribution of supporting data
Exposed Rock Presence (%) - Surficial Seafloor	Gridded coverage of values	Spatial distribution of supporting data

]]

Data format

Data type:	Substrates
Data origin:	Measured
Data format:	GeoTIFF
Other format:	github/bmi_dbseabed
Data resolution:	0.05 deg
Datum:	WGS84

Data Coverage

Spatial data coverage: Gulf of Mexico
Temporal data coverage: Time averaged
Time period covered: 1960 - 2024

Availability

Download data: https://github.com/gantian127/bmi dbseabed
Data source: http://instaar.colorado.edu/~jenkinsc/dbseabed/

References

• Cite as: Jenkins, C.J. & Gan, T. 2024. Gulf of Mexico Seafloor Substrates. INSTAAR, University of Colorado, Boulder CO USA. (URL: "https://csdms.colorado.edu/wiki/Alldata:DBSEABED"; Last edit 27 June 2024)