Oceanographic and Water-Quality Measurements-- Blackwater National Wildlife Refuge, Maryland, 2011 (CF) (ver. 1.1, September 2015)

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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: Neil K. Ganju
Originator: Patrick J. Dickhudt
Originator: Ellyn T. Montgomery
Originator: Patrick Brennand
Originator: R. Kyle Derby
Originator: Thomas W. Brooks
Originator: Marinna A. Martini
Originator: Jonathan Borden
Originator: Sandy Baldwin
Publication_Date: 20260506
Title:

Oceanographic and Water-Quality Measurements-- Blackwater National Wildlife Refuge, Maryland, 2011 (CF) (ver. 1.1, September 2015)

Edition: 1.1
Geospatial_Data_Presentation_Form: netCDF
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P14HXWKQ

Publication_Information:

Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Online_Linkage: https://doi.org/10.5066/P14HXWKQ
Larger_Work_Citation:

Citation_Information:

Oceanographic and Water-Quality Measurements-- Blackwater National Wildlife Refuge, Maryland, 2011 (ver. 1.1, September 2015)

Edition: 1.1
Geospatial_Data_Presentation_Form: netCDF
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P14HXWKQ

Publication_Information:

Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Other_Citation_Details:

Ganju, N.K., Dickhudt, P.J., Montgomery, E.T., Brennand, P., Derby, R.K, Brooks, T.W., Martini, M.A., Borden, J., and Baldwin, S., 2012, Oceanographic and Water-Quality Measurements-- Blackwater National Wildlife Refuge, Maryland, 2011 (ver. 1.1, September 2015): U.S. Geological Survey data release, https://doi.org/10.5066/P14HXWKQ.

Online_Linkage: https://doi.org/10.5066/P14HXWKQ

Description:

Abstract:

Suspended-sediment transport is a critical element governing the geomorphology of tidal marshes. Marshes rely both on organic material and inorganic sediment deposition to maintain their elevation relative to sea-level. In wetlands near the Blackwater National Wildlife Refuge, MD, portions of the salt marsh have been subsiding relative to sea level since the early 20th century. Other portions of the marsh have been successful at maintaining elevation. The USGS undertook measurements of suspended-sediment concentration in the tidal channels in order to understand the magnitude of suspended-sediment concentrations, the sediment-transport mechanisms, and relative differences between the two areas of the marsh. We deployed optical turbidity sensors and acoustic velocity meters at multiple sites over two periods in 2011. The time-series of oceanographic data collected during those field studies, including velocity, depth, turbidity, salinity, water temperature, and pH are presented here. For more information on the field operations associated with data collection: https://cmgds.marine.usgs.gov/fan_info.php?fan=2011-017-FA; https://cmgds.marine.usgs.gov/fan_info.php?fan=2011-029-FA; https://cmgds.marine.usgs.gov/fan_info.php?fan=2011-044-FA; https://cmgds.marine.usgs.gov/fan_info.php?fan=2011-050-FA.
The originally-processed, authoritative netCDF data files are provided in Equatorial Pacific Information Collection (EPIC) metadata convention, which has since been retired. A translated version is also available in the currently-used Climate and Forecast (CF) metadata convention. The primary difference between the two conventions is that EPIC has two time variables to represent Julian Day and milliseconds, while CF only has one time variable. Additionally, burst data and some waves files were not converted to CF due to the inability to handle 2D time with multidimensional variables. Therefore, the CF files may not represent all the data files released. Files may be downloaded or accessed using the Open-source Project for a Network Data Access Protocol (OPeNDAP) or via Thematic Realtime Environmental Distributed Data Services (THREDDS).

Purpose:

This dataset in CF-1.6 convention provides measurements from an estuarine field study that occurred in the spring and fall of 2011. The data were collected in support of efforts to model the circulation, nutrient and sediment fluxes in the marsh. The background and experimental setup are described in the open file report "Summary of Oceanographic and Water-Quality Measurements near the Blackwater National Wildlife Refuge, 2011", https://pubs.usgs.gov/of/2012/1099/. The basic sampling interval data files are provided at the rate at which the sensor made observations- no temporal averaging, filtering or subsampling was done. The data files are accessible by clicking the file name.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 201103
Ending_Date: 201112

Currentness_Reference:

ground condition of data collection; data were not collected during the entire span of dates. See the sampling interval link for specific start and end dates for each instrument.

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -76.1
East_Bounding_Coordinate: -75.95
North_Bounding_Coordinate: +38.425
South_Bounding_Coordinate: +38.35

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:56d198cd-319e-4095-8a66-98279c226db9

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: Oceanographic observations
Theme_Keyword: Currents
Theme_Keyword: Dissolved Oxygen
Theme_Keyword: Pressure
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Woods Hole Coastal and Marine Science Center
Theme_Keyword: WHCMSC
Theme_Keyword: netCDF
Theme_Keyword: 2011-017-FA
Theme_Keyword: 2011-029-FA
Theme_Keyword: 2011-044-FA
Theme_Keyword: 2011-050-FA

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: inlandWaters
Theme_Keyword: geoscientificInformation
Theme_Keyword: climatologyMeteorologyAtmosphere

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: navigational data
Theme_Keyword: marine geophysics
Theme_Keyword: salinity
Theme_Keyword: turbidity
Theme_Keyword: water temperature
Theme_Keyword: oxygen content (water)

Place:

Place_Keyword_Thesaurus: Common geographic areas
Place_Keyword: Blackwater National Wildlife Refuge
Place_Keyword: United States
Place_Keyword: North America
Place_Keyword: Maryland

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: Chesapeake Bay
Place_Keyword: DelMarva
Place_Keyword: Mid-Atlantic
Place_Keyword: MD

Temporal:

Temporal_Keyword_Thesaurus: None
Temporal_Keyword: 2011
Temporal_Keyword: spring
Temporal_Keyword: fall

Access_Constraints:

No access constraints. Please see 'Distribution Information' for details.

Use_Constraints:

These data are marked with a Creative Commons Zero v1.0 Universal (CC0-1.0) public domain dedication and do not have any use constraints. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. 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_Person_Primary:

Contact_Person: Neil K. Ganju
Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: United States

Contact_Voice_Telephone: (508) 457-8700 x2252
Contact_Electronic_Mail_Address: nganju@usgs.gov

Data_Set_Credit:

Funding was provided by the U.S. Geological Survey Coastal and Marine Geology Program and Global Climate Change Program.

Cross_Reference:

Citation_Information:

Originator: E.T. Montgomery
Originator: M.A. Martini
Originator: F.L. Lightsom
Originator: Bradford Butman
Publication_Date: 2008
Title:

Documentation of the U.S. Geological Survey Oceanographic Time Series Measurement Database

Series_Information:

Series_Name: Open-File Report
Issue_Identification: 2007-1194

Publication_Information:

Publication_Place: Reston, VA
Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.3133/ofr20071194

Cross_Reference:

Citation_Information:

Originator: N.K. Ganju
Originator: P.J. Dickhudt
Originator: E.T. Montgomery
Originator: P. Brennand
Originator: R.K. Derby
Originator: T.W. Brooks
Originator: M.A. Martini
Originator: J. Borden
Originator: S. Baldwin
Publication_Date: 2011
Title:

Summary of Oceanographic and Water-Quality Measurements near the Blackwater National Wildlife Refuge, 2011

Series_Information:

Series_Name: Open-File Report
Issue_Identification: 2012-1099

Publication_Information:

Publication_Place: Reston, VA
Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.3133/ofr20121099

Data_Quality_Information:

Logical_Consistency_Report: Data are logically consistent
Completeness_Report:

The data have been edited to remove outlying points and data recorded when the instruments were out of the water (before and after deployment or at low tide).

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The deployment locations were measured by a hand-held GPS (Garmin GPS C76).

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

The sensors were mounted on poles or the channel bottom in less than 5 meters of water. The tidal range here is ~0.5 meters so as the tide changes, so will the relative depth. Height above the bottom will not change and be accurate to within 5 cm, while depth may change significantly.

Lineage:

Process_Step:

Process_Description:

FIELD PROGRAM: Between March and May 2011, continuous measurements were collected at three sites in the Blackwater complex (moorings 903, 904, 905) and three sites in the Fishing Bay complex (moorings 906, 907,908). Identical pole-mounted YSI sensors were deployed at all six sites. Parameters measured include water level, salinity, temperature, dissolved Oxygen, pH, and turbidity. Between September and October 2011, continuous measurements were collected at two sites in the Blackwater complex (moorings 916, 917) and two sites in the Fishing Bay complex (moorings 915, 918). A pole-mounted YSI and an upward looking current profiler were deployed at sites 915 and 916, with a pole-mounted turbidity sensor deployed at 917 and 918. Parameters measured include water level, water velocity, salinity, temperature, dissolved Oxygen, and turbidity.

Process_Date: 2012

Process_Step:

Process_Description:

DATA PROCESSING: Data processing was conducted using the proprietary software for each instrument, and (or) specialized software developed by the USGS. The proprietary software was often used to download data from the instruments and export the data to ASCII-files. Post-processing of the raw binary or ASCII files was accomplished using USGS software developed in the MATLAB (http://www.mathworks.com/) programming language. As part of the processing, instrument-specific formats were converted to the EPIC-standard NetCDF format (http://www.pmel.noaa.gov/epic/) and scientific units. Data were carefully checked for inconsistencies, time drift, and other problems and then edited if needed. The beginning and end of each data series were truncated to remove data collected out of water. After final editing, the best basic version of the data file that includes all variables recorded at the basic sampling interval (the fastest rate at which the sensor sampled) is published.

Process_Date: 2012
Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Ellyn Montgomery
Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: United States

Contact_Voice_Telephone: 508-457-8700 x2356
Contact_Electronic_Mail_Address: emontgomery@usgs.gov

Process_Step:

Process_Description:

Edits to the metadata were made to fix any errors that MP v 2.9.32 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Added online link to experiment page. Fixed online link to cross-reference. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent.

Process_Date: 20160712
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross

Contact_Position: Marine Geologist
Contact_Address:

Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543

Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov

Process_Step:

Process_Description: USGS Thesaurus keywords added to the keyword section.
Process_Date: 20180720
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross

Contact_Position: Marine Geologist
Contact_Address:

Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598

Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov

Process_Step:

Process_Description: Fixed broken links.
Process_Date: 20190131
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross

Contact_Position: Marine Geologist
Contact_Address:

Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598

Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov

Process_Step:

Process_Description:

A python script called "collect.py" was used to translate EPIC convention netcdf files into CF-1.6 convention netcdf files. Burst data and some waves files were not converted to CF due to the inability to handle 2D time with multidimensional variables. Therefore, the CF files may not represent all the data files released. This work was performed by Ellyn Montgomery in 2017, but not officially documented in the metadata until 2026. In 2026, this data release was migrated from the server https://stellwagen.er.usgs.gov/ to the Coastal and Marine Hazards and Resources Program Trusted Digital Repository (CMGDS) via the Data Release Builder. This move was part of a larger effort to consolidate websites and reduce the number of sub-domains within the U.S. Geological Survey. The EPIC form of the existing metadata was used as the basis for this metadata file and updated to document the CF transformation of the data as well as conform to current standards. The data themselves met the standards at the time of initial release to the public. Specific edits for the metadata include but are not limited to: updating the Network Resource links to point to the new location of the data, updating various elements (Use Constraints, Access Constraints, Distribution Liability) to conform to today’s standards, updating the citation, and adding USGS Thesaurus keywords, edition, geoform, data series, data issue, supplemental information, entity and attribute overview, and horizontal and vertical datums. Additionally, a shapefile was created from the originally released KML file to document data location.

Process_Date: 20260306
Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Olivia A. De Meo
Contact_Organization: U.S. Geological Survey, Northeast Region

Contact_Position: Physical Scientist
Contact_Address:

Address_Type: mailing address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Country: US

Contact_Voice_Telephone: 508-548-8700 x2356
Contact_Electronic_Mail_Address: whsc_data_contact@usgs.gov
Contact_Instructions:

The contact email address is a generic address in the event the person is no longer with USGS.

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Point

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:

North American Datum of 1983 (National Spatial Reference System 2011)

Ellipsoid_Name: GRS_1980
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222

Vertical_Coordinate_System_Definition:

Depth_System_Definition:

Depth_Datum_Name: Local surface
Depth_Resolution: 0.01
Depth_Distance_Units: meters
Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

9031ysi-a.nc; instrument: YSI model 6920; variables: conductivity, pH, salinity, temperature, turbidity 9041ysi-a.nc; instrument: YSI model 6920; variables: conductivity, pH, salinity, temperature, turbidity 9051ysi-a.nc; instrument: YSI model 6920; variables: conductivity, pH, salinity, temperature, turbidity 9061ysi-a.nc; instrument: YSI model 6920; variables: conductivity, pH, salinity, temperature, turbidity 9071ysi-a.nc; instrument: YSI model 6920; variables: conductivity, pH, salinity, temperature, turbidity 9081ysi-a.nc; instrument: YSI model 6920; variables: conductivity, pH, salinity, temperature, turbidity 9151ysi-a.nc; instrument: YSI model 6600; variables: conductivity, oxygen, salinity, temperature, turbidity 9152aqd-a.nc; instrument: Nortek Aquadopp Profiler; variables: currents, pressure, sound velocity, temperature 9161ysi-a.nc; instrument: YSI model 6600; variables: conductivity, oxygen, salinity, temperature, turbidity 9162aqd-a.nc; instrument: Nortek Aquadopp Profiler; variables: currents, pressure, sound velocity, temperature 9171eco-a.nc; instrument: Wetlabs ECO BBSB; variables: turbidity 9181eco-a.nc; instrument: Wetlabs ECO BBSB; variables: turbidity

Entity_and_Attribute_Detail_Citation:

The entity and attribute information were generated by the metadata contact person, unless otherwise noted. Please review the rest of the metadata record for additional details and information.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Neil K. Ganju
Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1498
Country: USA

Contact_Voice_Telephone: (508) 457-8700 x2252
Contact_Electronic_Mail_Address: stellwagen_manager@usgs.gov

Resource_Description:

Downloadable data in self-describing netCDF files and metadata as xml and text formats.

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: netCDF
Format_Version_Number: netCDF-4, CF-1.6
File_Decompression_Technique:

Compressed file of whole dataset and uncompressed individual files provided.

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P14HXWKQ

Access_Instructions:

The link is to the landing page of the data release where files can be downloaded individually.

Fees: None.

Technical_Prerequisites:

The user's computer must have software to read netCDF files or import OPeNDAP.

Metadata_Reference_Information:

Metadata_Date: 20260506
Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Ellyn T. Montgomery
Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: United States

Contact_Voice_Telephone: (508) 457-8700 x2356
Contact_Electronic_Mail_Address: whsc_data_contact@usgs.gov
Contact_Instructions:

The metadata contact email address is a generic address in the event the metadata contact is no longer with the USGS or the email is otherwise invalid.

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time

This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/DRB_data_release/DRB_P14HXWKQ/BW2011_meta_CF.html>