ca14_winterextreme_orbitalvelocities, California

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Li H. Erikson
Originator: Curt D. Storlazzi
Originator: Nadine E. Golden
Originator: Erik N. Lowe
Publication_Date: 2014
Title: ca14_winterextreme_orbitalvelocities, California
Edition: 1.0
Geospatial_Data_Presentation_Form: GeoTiff
Larger_Work_Citation:
Citation_Information:
Originator: Li H. Erikson
Originator: Curt D. Storlazzi
Originator: Nadine E. Golden
Originator: Erik N. Lowe
Publication_Date: 2014
Title:
Wave and Orbital Velocity Model Data for the California Continental Shelf
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Santa Cruz, CA
Publisher: U.S. Geological Survey
Online_Linkage: <http://dx.doi.org/10.5066/F7125QNQ>

Description:
Abstract:
Ecologists have long recognized that the structure and function of benthic marine ecosystems are closely linked to oceanographic processes. Quantifying the natural spatial and temporal variability of disturbances affecting benthic marine ecosystems is thus critical for planning and management of areas such as marine protected areas and for permitting offshore activities such as trawling, dredging, and the placement of sea-floor engineering structures (cables and pipelines for example).
The oceanographic processes that disturb the continental shelf include the actions of surface waves, internal waves, and currents (tidal, density, wave-driven, wind-driven, and geostrophic). Because the North Pacific Ocean can generate extremely large surface waves that yield relatively high near-bed wave orbital velocities, wave-generated near bed currents are often considered to be the dominant mechanism for seabed disturbances along the California coast (Sherwood and others, 1994; Storlazzi and Jaffe, 2002; Storlazzi and others, 2003).
In this study, bathymetric data compiled as part of the CSMP project and within the 3nm limit were supplemented with deeper water bathymetric data (NOAA, <http://maps.ngdc.noaa.gov/>, last
Purpose:
These data are intended for science researchers, students, policy makers, and the general public. These data can be used with geographic information systems or other software to identify bathymetric features. These data are not intended to be used for navigation.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 2004
Ending_Date: 2013
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -119.075472
East_Bounding_Coordinate: -117.568272
North_Bounding_Coordinate: 34.070106
South_Bounding_Coordinate: 33.180506
Keywords:
Theme:
Theme_Keyword_Thesaurus: Global Change Master Directory (GCMD)
Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN WAVES
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: Marine Geology
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: CSMP
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: oceans
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: State of California
Access_Constraints: None
Use_Constraints:
This information is not intended for navigational purposes. Read and fully comprehend the metadata prior to data use. Uses of these data should not violate the spatial resolution of the data. Where these data are used in combination with other data of different resolution, the resolution of the combined output will be limited by the lowest resolution of all the data.
Acknowledge the U.S. Geological Survey and California State University, Monterey Bay, Seafloor Mapping Lab in products derived from these data. Share data products developed using these data with the U.S. Geological Survey.
This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document these data in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Li Erikson
Contact_Organization:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Contact_Position: Physical Scientist
Contact_Address:
Address_Type: mailing and physical address
Address: 400 Natural Bridges Dr.
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060-5792
Country: USA
Contact_Voice_Telephone: (831) 460-7563
Contact_Facsimile_Telephone: (831) 427-4709
Contact_Electronic_Mail_Address: lerikson@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name:
<http://www.axiomdatascience.com/files/usgs/wavemodel_images/?var=ca14_winterextreme_orbitalvelocities>
Browse_Graphic_File_Description: Image of high/low value symbolized GeoTiff
Browse_Graphic_File_Type: JPEG
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: Not applicable for raster data.
Logical_Consistency_Report: Unspecified
Completeness_Report: Complete
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Estimated to be no less than 2 m, owing to water depth and total propagated uncertainties of the mapping systems, which include sonar system, position and motion compensation system, and navigation, as well as data processing that includes sounding cleaning, gridding, and datum transformations.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Estimated to be no less than 20 cm, owing to water depth and total propagated uncertainties of the mapping systems, which include sonar system, position and motion compensation system, and navigation, as well as data processing that includes sounding cleaning, gridding, and datum transformations.
Lineage:
Process_Step:
Process_Description:
A total of 15 grids encompassing the entire California State open coastline were generated and used in the SWAN simulations. All grids were curvi-linear with approximate cross- and along-shore resolutions of 30-50m and 60-100m in the shallow inshore regions, respectively. Model grid cells were smaller in the cross-shore direction, in shallow water, and around complex bathymetry to allow for better representation of wave refraction and shoaling. Latitudinal extents were defined based on local geography and computation limitations. The offshore extent of the model grids were define by 64 Wave Information System (WIS, <http://wis.usace.army.mil/>) model output stations located approximately 20km offshore along the entire California coast. The WIS database consists of continuous hourly wave and wind parameter time-series spanning the years 1980 through 2011 (31 years). These data were used to calculate seasonal mean and extreme (arithmetic mean of highest 5%) statistics at the 64 WIS output locations. Computed wave parameters (significant wave heights, peak period, and peak wave direction) were then applied at the boundaries of the 16 SWAN grids. Winds at the most centrally located WIS station of each grid were applied uniformly across the SWAN domains to allow for inclusion of locally wind-generated waves in addition to (usually greater) energy contributions from distantly generated swell waves. Seasons were defined as winter from December through February, spring from March through May, summer from June through August, and fall from September through November. Geoprocessing was done using ArcMap (version 10.1, ESRI, 2012). Geoprocessing steps for each Delph ascii file: 1) Convert ascii.txt to ArcGIS grid; 2) Project grid to GCS_NAD_1983_2011, D_NAD_1983_2011; 3) Clipped grid to block boundaries; 4) Convert grid to GeoTiff, and 5) Symbolize layer.
Process_Date: 2013
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Nadine Golden
Contact_Organization:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Contact_Position: Geographer
Contact_Address:
Address_Type: mailing and physical address
Address: 400 Natural Bridges Dr.
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060-5792
Country: USA
Contact_Voice_Telephone: (831) 460-7530
Contact_Electronic_Mail_Address: ngolden@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 11
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -117.00000
Latitude_of_Projection_Origin: 0.00000
False_Easting: 500000.0
False_Northing: 0.00
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 2.0
Ordinate_Resolution: 2.0
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: NAD83
Ellipsoid_Name: GRS80
Semi-major_Axis: 6378137.00 meters
Denominator_of_Flattening_Ratio: 298.257223563
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview: See Process_Description
Entity_and_Attribute_Detail_Citation: USGS
Metadata_Reference_Information:
Metadata_Date: 20140108
Metadata_Review_Date: 20140116
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Nadine Golden
Contact_Organization:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Contact_Position: Geographer
Contact_Address:
Address_Type: mailing and physical address
Address: 400 Natural Bridges Dr.
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060-5792
Country: USA
Contact_Voice_Telephone: (831) 460-7530
Contact_Facsimile_Telephone: (831) 427-4709
Contact_Electronic_Mail_Address: ngolden@usgs.gov
Metadata_Standard_Name:
Content Standard for Digital Geospatial Metadata ("CSDGM version 2")
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: universal time
Generated by mp version 2.9.12 on Fri Nov 14 14:05:15 2014