Near-shore seawater-column measurements of excess radon (Rn-222) and water levels, Faga'alu Bay, Tutuila, American Samoa, August 2018

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Ferdinand K.J. Oberle
Originator: Nancy G. Prouty
Originator: Curt D. Storlazzi
Publication_Date: 20210520
Title:

Near-shore seawater-column measurements of excess radon (Rn-222) and water levels, Faga'alu Bay, Tutuila, American Samoa, August 2018

Geospatial_Data_Presentation_Form: comma-delimited text
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9F0LJNC

Publication_Information:

Publication_Place:

Pacific Coastal and Marine Science Center, Santa Cruz, California

Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/P9F0LJNC
Online_Linkage:

https://www.sciencebase.gov/catalog/item/6074f9a3d34e018b31fff905

Description:

Abstract:

This data table includes in-situ near-shore seawater measurements of excess radon (Rn-222) and water levels collected in Faga'alu Bay, Tutuila, American Samoa.

Purpose:

Radon (Rn-222) data were collected to characterize the advection rate of groundwater onto the near-shore reef. When analyzed in conjunction with measurements of changing water levels from tides and waves, the data can be used to assess the potential for terrestrial groundwater intrusion on the reef and the sources and fate of these water masses.

Supplemental_Information:

Additional information about the field activity from which these data were derived is available online at:
http://cmgds.marine.usgs.gov/fan_info.php?fan=2018-634-FA
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20180809
Ending_Date: 20180812

Currentness_Reference: ground condition at time data were collected

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -170.68171
East_Bounding_Coordinate: -170.68070
North_Bounding_Coordinate: -14.28889
South_Bounding_Coordinate: -14.28986

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: Oceans
Theme_Keyword: geoscientificInformation

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Water Column Features

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: time series datasets
Theme_Keyword: marine water quality

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: physical oceanography

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5a0af0a6-0e01-4634-a3ae-0b006d62ccf5

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Hazards and Resources Program
Theme_Keyword: CMHRP
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Tutuila Island
Place_Keyword: Territory of American Samoa
Place_Keyword: Faga’alu

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: Faga'alu Bay

Access_Constraints: None
Use_Constraints:

USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Person: PCMSC Science Data Coordinator

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-460-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Native_Data_Set_Environment:

Raw data from the DURRIDGE RAD7 radon detector were processed using the manufacturers software, DURRIDGE CAPTURE, on a Dell Personal Computer running Windows 7 Operating System.

Cross_Reference:

Citation_Information:

Originator: Burnett, W.C.
Originator: Kim, G.
Originator: Lane-Smith, D.
Publication_Date: 2001
Title:

A continuous monitor for assessment of 222Rn in the coastal ocean

Other_Citation_Details:

Burnett, W.C., Kim, G., and Lane-Smith, D., 2001, A continuous monitor for assessment of 222Rn in the coastal ocean: Journal of Radioanalytical and Nuclear Chemistry, v. 249, p. 167–172

Online_Linkage: https://doi.org/10.1023/A:1013217821419

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted.

Logical_Consistency_Report: Data fall within expected ranges.
Completeness_Report:

Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the metadata for each part of this data release carefully for additional details.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. The stated accuracy of the GPS unit used to determine the location of the instruments is +/- 5 m.

Lineage:

Process_Step:

Process_Description:

Radon (Rn-222) concentration data were collected with a DURRIDGE RAD7 radon detector. The alpha decay of Rn-222 was detected at 3-minute intervals with the RAD7 in SNIFF mode. In SNIFF mode, the instrument detects radon entry points and gushers, and it recovers from high radon exposures in minutes. At the end of each run, the detector printed out a complete report. The RAD7 data were QA/QC’d, and raw counts of radon were exported using the manufacturer’s CAPTURE software.

Process_Date: 20180811

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 195

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.00001
Longitude_Resolution: 0.00001
Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257223563

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: ASCII Table
Entity_Type_Definition:

Comma-delimited ASCII table of a point measurement of groundwater excess radon.

Entity_Type_Definition_Source: Producer defined

Attribute:

Attribute_Label: Date
Attribute_Definition: Date and time referenced to Universal Coordinated Time
Attribute_Definition_Source: Global Positioning System
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2018/08/09 23:38:00
Range_Domain_Maximum: 2018/08/12 01:27:00
Attribute_Units_of_Measure: YYYY/MM/DD hour:minutes:seconds
Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: Excess Radon (dpm m-3)
Attribute_Definition: Excess Radon
Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 342
Range_Domain_Maximum: 6911
Attribute_Units_of_Measure: centimeters per day
Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: Water Level (m)
Attribute_Definition: Water Level
Attribute_Definition_Source: Producer Defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.81
Range_Domain_Maximum: 2.43
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 0.01

Attribute:

Attribute_Label: Latitude (Decimal Degrees)
Attribute_Definition: Latitude in decimal degrees
Attribute_Definition_Source: Global Positioning System
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -14.28986
Range_Domain_Maximum: -14.28889
Attribute_Units_of_Measure: decimal degrees
Attribute_Measurement_Resolution: 0.00001

Attribute:

Attribute_Label: Longitude (Decimal Degrees)
Attribute_Definition: Longitude in decimal degrees
Attribute_Definition_Source: Global Positioning System
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -170.68070
Range_Domain_Maximum: -170.68171
Attribute_Units_of_Measure: decimal degrees
Attribute_Measurement_Resolution: 0.00001

Overview_Description:

Entity_and_Attribute_Overview: The first line of the csv file is a header line.
Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey - ScienceBase

Contact_Address:

Address_Type: mailing and physical
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225

Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov

Resource_Description:

These data are available in comma-delimited ascii csv format contained in a single file (Faga18_Rn_data.csv) accompanied by CMGDS FGDC-compliant metadata.

Distribution_Liability:

Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: comma-delimited text
Format_Version_Date: 20180818
Format_Information_Content: CSV ascii text file contains the data.
File_Decompression_Technique: none
Transfer_Size: 0.003

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/6074f9a3d34e018b31fff905

Network_Resource_Name: https://doi.org/10.5066/P9F0LJNC

Access_Instructions:

Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zipped file of data and metadata. The second link points to a landing page for the entire data release.

Fees: None.

Technical_Prerequisites: These data can be viewed with any text editor software.

Metadata_Reference_Information:

Metadata_Date: 20210520
Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

U.S. Geological Survey, Pacific Coastal and Marine Science Center

Contact_Person: PCMSC Science Data Coordinator

Contact_Address:

Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060

Contact_Voice_Telephone: 831-460-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/ScienceBase/DR_P9F0LJNC/Faga18_Rn_metadata.html>