CTD (conductivity-temperature-depth) data collected on Stellwagen Bank during U.S. Geological Survey field activity 2017-030-FA, aboard the R/V Auk, May 18-23, 2017

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Page C. Valentine
Publication_Date: 2019
Title:
CTD (conductivity-temperature-depth) data collected on Stellwagen Bank during U.S. Geological Survey field activity 2017-030-FA, aboard the R/V Auk, May 18-23, 2017
Edition: 1.0
Geospatial_Data_Presentation_Form: profile - water column
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P94GOZ7C
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher:
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
Online_Linkage: https://doi.org/10.5066/P94GOZ7C
Online_Linkage: Larger_Work_Citation:
Citation_Information:
Originator: Page C. Valentine
Originator: VeeAnn A. Cross
Publication_Date: 2019
Title:
Sea-floor sediment samples, seabed imagery, and CTD instrument data collected on Stellwagen Bank in May 2017, U.S. Geological Survey Field Activity 2017-030-FA
Edition: 1.0
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P94GOZ7C
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Suggested citation: Valentine, P.C., and Cross, V.A., 2019, Sea-floor sediment samples, seabed imagery, and CTD instrument data collected on Stellwagen Bank in May 2017, U.S. Geological Survey Field Activity 2017-030-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P94GOZ7C.
Online_Linkage: https://doi.org/10.5066/P94GOZ7C
Online_Linkage:
Description:
Abstract:
This field activity is part of the effort to map geologic substrates of the Stellwagen Bank National Marine Sanctuary region off Boston, Massachusetts. The overall goal is to develop high-resolution (1:25,000) interpretive maps, based on multibeam sonar data and seabed sampling, showing surficial geology and seabed sediment dynamics. This cruise was conducted in collaboration with the Stellwagen Bank National Marine Sanctuary, and the data collected will aid research on the ecology of fish and invertebrate species that inhabit the region. The Sanctuary's research vessel, R/V Auk, visited 50 locations on Stellwagen Bank at which a customized Van Veen grab sampler (SEABOSS) equipped with a video camera and a CTD was deployed in drift mode to collect sediment for grain-size analysis, video imagery of the seabed, and measurements of water column properties.
Purpose:
These data are collected to map the seasonal temperature, salinity, density, fluorescence (chlorophyll A), and turbidity configuration of the water column which affect the distribution and availability of plankton and the distribution of fish and invertebrate species.
Supplemental_Information:
Additional information regarding the field activity can be obtained from https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-030-FA.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20170518
Ending_Date: 20170523
Currentness_Reference:
ground condition when data were collected. Actual dates of collection May 18, 19, and 23, 2017
Status:
Progress: complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -70.458560
East_Bounding_Coordinate: -70.134090
North_Bounding_Coordinate: 42.420730
South_Bounding_Coordinate: 42.171150
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:4b35177b-2db4-49d9-a657-64b13c2a8a44
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: Woods Hole Coastal and Marine Science Center
Theme_Keyword: WHCMSC
Theme_Keyword: CTD
Theme_Keyword: conductivity
Theme_Keyword: temperature
Theme_Keyword: depth
Theme_Keyword: salinity
Theme_Keyword: water density
Theme_Keyword: fluorescence
Theme_Keyword: turbidity
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: geoscientificInformation
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: marine chemistry
Theme_Keyword: CTD measurement
Theme_Keyword: ocean temperature
Theme_Keyword: ocean salinity
Theme_Keyword: turbidity
Theme_Keyword: ocean sciences
Theme:
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: chemical oceanography
Theme_Keyword: environmental chemistry
Theme_Keyword: oceanographic observations
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: North America
Place_Keyword: United States
Place_Keyword: Massachusetts
Place_Keyword: Atlantic Ocean
Place_Keyword: Stellwagen Bank
Place_Keyword: Stellwagen Bank National Marine Sanctuary
Place_Keyword: SBNMS
Place_Keyword: Massachusetts Bay
Access_Constraints: None.
Use_Constraints: Not to be used for navigation.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Page C. Valentine
Contact_Position: Research Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: (508) 548-8700 x2239
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: pvalentine@usgs.gov
Cross_Reference:
Citation_Information:
Originator: D.S. Blackwood
Originator: K.F. Parolski
Publication_Date: 2001
Title: Seabed observation and sampling system
Series_Information:
Series_Name: Sea Technology
Issue_Identification: v. 42, no. 2, p.39-43
Cross_Reference:
Citation_Information:
Originator: P. Valentine
Originator: D. Blackwood
Originator: K. Parolski
Publication_Date: 2000
Title: Seabed observation and sampling system
Series_Information:
Series_Name: U.S. Geological Survey Fact Sheet
Issue_Identification: FS-142-00
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: https://doi.org/10.3133/fs14200
Online_Linkage: https://pubs.usgs.gov/fs/fs142-00/
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
These files represent unedited data acquired from the Sea-Bird CTD that was mounted on the SEABOSS system. The data were collected during the descent (downcast) of the SEABOSS to the seabed, its drift over the seabed, and its ascent (upcast) to the water surface. The data values presented here have not been edited or modified. The data accuracy is expected to meet the instrument accuracy specifications.
Logical_Consistency_Report:
The filenames correspond to the station names. Therefore the locations of the casts can be acquired from the station locations in the station data summary file (available from the Larger Work). The naming convention for the CTD casts is staXXXX_ctd_data.txt where XXXX corresponds to the station number.
Completeness_Report:
The Sea-Bird instrument is mounted on the SEABOSS system. All data (downcast, drift, and upcast) are included. All SEABOSS stations on the cruise have a CTD record. There are a total of 50 CTD data files.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Although these files do not contain latitudes and longitudes, that information can be acquired from the related station data summary file (available from the Larger Work citation). The CTD downcast is located at the start of the video drift, and the upcast is located at the end of the video drift. The location information for stations was acquired from a satellite navigation receiver (Furuno satellite compass SC-30, GPS receiver) at two second intervals with a horizontal accuracy of 10 m. The navigation antenna is located 5.3 m forward of the SEABOSS deployment location. This offset was not accounted for in the navigation acquisition (navigation fixes represent antenna location).
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The depth values are based on the instrument's pressure gauge and are relative to the local sea surface. The CTD is mounted horizontally on the SEABOSS frame and its maximum depth is approximately 1 meter above the seabed.
Lineage:
Process_Step:
Process_Description:
These data were collected with a Sea-Bird CTD (conductivity, temperature, depth) instrument - a SBE19plusV2 SeaCAT Profiler CTD. This instrument was deployed on the USGS SEABed Observation and Sampling System (SEABOSS). See the cross-references for additional information on this system. The SEABOSS is an instrument developed by the USGS to collect samples and video and photographic images of the seabed to aid in the interpretation of seabed sonar imagery. The CTD is mounted horizontally on the SEABOSS frame and its maximum depth is approximately 1 meter above the seabed. The specifications for the CTD instrument are as follows:

SBE19plusV2, serial number 01906617 manufactured by Sea-Bird Electronics, Inc.
Firmware version: 2.2c
Firmware date: 7 December 2009
Manufactured date: 29 July 2010
Software version: 2.3.0

Internal sensors:
main temperature, serial number 01906617
main conductivity, serial number 01906617
main pressure, type, strain, serial number 3161799

External sensors from WET Labs:
ECO-FLNTURT CHL, serial number FLNTURT-1798; WET Labs fluorometer, ECO-AFL/FL
ECO-FLNTURT TURB, serial number FLNTURT-1798; WET Labs turbidity meter, ECO-NTU
Configuration:
Instrument battery operated; not connected to a conducting cable
Profile mode: sampling rate 4 per second, averaged to provide each data point
CTD deployed on the USGS SEABed Observation and Sampling System (SEABOSS)
Data archive:
All data; downcast, drift, and upcast 

The temperature (degrees C) sensor has the following specifications:
measurement range -5 to +35 degrees C; initial accuracy +-0.005; resolution 0.0001; 

The conductivity (S/m) has the following specifications:

measurement range 0 to 9 S/m; initial accuracy +- 0.0005; resolution varies: 0.00005 (most oceanic water; resolves 0.4 ppm in salinity) 0.00007 (high salinity water; resolves 0.4 ppm in salinity) 0.00001 (fresh water; resolves 0.1 ppm in salinity)

The strain gauge pressure:

measurement range 0 to full scale range: 20/100/350/600/1000/2000/3500/7000; initial accuracy +- 0.1% of full scale range; resolution 0.002% of full scale range.

The turbidity sensor:
wavelength 700 nm; sensitivity 0.01 NTU, rant 0-25 NTU

Fluorescence sensor:
Chlorophyll-a 470 nm EX/695 nm EM; sensitivity 0.2 micro-g/l; range 0-125 micro-g/l Chl
Process_Date: 2017
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Page C. Valentine
Contact_Position: Research Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: (508) 548-8700 x2239
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: pvalentine@usgs.gov
Process_Step:
Process_Description:
The Sea-Bird instrument is mounted on the SEABOSS system. All data (downcast, drift, upcast) are included. At the end of the cruise, the CTD data are downloaded via a laptop using the Sea-Bird software. The latitude and longitude of the start and end of the video drift are available from 2017-030-FA_station_data_summary dataset, available from the Larger Work citation. The station summary data are available in XLSX, CSV, and shapefile formats.
Process_Date: 2017
Process_Step:
Process_Description:
Added keywords section with USGS persistent identifier as theme keyword.
Process_Date: 20200908
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
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: local surface
Depth_Resolution: 0.001
Depth_Distance_Units: meters
Depth_Encoding_Method: Implicit coordinate
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Sea-Bird CTD
Entity_Type_Definition:
The data from each station is included in an ASCII text file with an 11-row header that gives the station number and the output format of the data - what information is in each column. The remaining rows (starting at row 12) are columns of measured values that are space-delimited, and which correspond to the columns listed in the header.
Entity_Type_Definition_Source: Sea-Bird Electronics
Attribute:
Attribute_Label: salt water depth, meter (0.000)
Attribute_Definition:
Calculated value involving pressure, water density and compressibility as well as the strength of the local gravity field. Units are meters.
Attribute_Definition_Source: Sea-Bird Electronics
Attribute_Domain_Values:
Unrepresentable_Domain:
Although this is a numeric value, the data value range for the dataset has not been evaluated.
Attribute:
Attribute_Label: water temperature (standard ITS-90), deg C (0.0000)
Attribute_Definition:
Temperature directly measured by the temperature-sensing instrument (thermistor). Units are degrees Celsius.
Attribute_Definition_Source: Sea-Bird Electronics
Attribute_Domain_Values:
Unrepresentable_Domain:
Although this is a numeric value, the data value range for the dataset has not been evaluated.
Attribute:
Attribute_Label: salinity, practical salinity units (PSU) (0.0000)
Attribute_Definition:
Calculated value derived from the measured properties (conductivity, temperature and pressure) of the instrument. Units are practical salinity units.
Attribute_Definition_Source: Sea-Bird Electronics
Attribute_Domain_Values:
Unrepresentable_Domain:
Although this is a numeric value, the data value range for the dataset has not been evaluated.
Attribute:
Attribute_Label: water density, sigma-t, kilograms per cubic meter (0.0000)
Attribute_Definition:
Calculated value derived from the measured properties (conductivity, temperature and pressure) of the instrument. Units are kilograms per cubic meter.
Attribute_Definition_Source: Sea-Bird Electronics
Attribute_Domain_Values:
Unrepresentable_Domain:
Although this is a numeric value, the data value range for the dataset has not been evaluated.
Attribute:
Attribute_Label: fluorescence, milligrams per cubic meter (0.0000)
Attribute_Definition:
Fluorescence is a measurement of chlorophyll A concentration in a volume of seawater. Units are milligrams per cubic meter.
Attribute_Definition_Source: Sea-Bird Electronics
Attribute_Domain_Values:
Unrepresentable_Domain:
Although this is a numeric value, the data value range for the dataset has not been evaluated.
Attribute:
Attribute_Label: turbidity, nephelometric turbidity units (NTU) (0.0000)
Attribute_Definition:
Turbidity is a measurement of particles in a volume of seawater. Units are nephelometric turbidity units.
Attribute_Definition_Source: Sea-Bird Electronics
Attribute_Domain_Values:
Unrepresentable_Domain:
Although this is a numeric value, the data value range for the dataset has not been evaluated.
Attribute:
Attribute_Label: if data flagged, indicates error in data collection
Attribute_Definition: System method of indicating erroneous or bad data.
Attribute_Definition_Source: Sea-Bird Electronics
Attribute_Domain_Values:
Unrepresentable_Domain: A value other than zero indicates an error in data collection
Overview_Description:
Entity_and_Attribute_Overview:
The following is a sample header and a few rows of the data:

Sta 4579
Output data format
Column 1, salt water depth, meter (0.000)
Column 2, water temperature (standard ITS-90), deg C (0.0000)
Column 3, salinity, practical salinity units (PSU) (0.0000)
Column 4, water density, sigma-t, kilograms per cubic meter (0.0000)
Column 5, fluorescence, milligrams per cubic meter (0.0000)
Column 6, turbidity, nephelometric turbidity units (NTU) (0.0000)
Column 7, if data flagged, indicates error in data collection
-0.196    21.2059     0.0000    -2.0511    -0.0449    -0.0084  0.000e+00
-0.198    21.2044     0.0000    -2.0508    -0.0403     0.1717  0.000e+00
-0.198    21.2032     0.0000    -2.0505     0.0299     0.0221  0.000e+00
-0.199    21.2022     0.0000    -2.0503     0.0116     0.0500  0.000e+00
-0.199    21.1997     0.0000    -2.0498    -0.0052     0.0545  0.000e+00
-0.199    21.1985     0.0000    -2.0495    -0.0090    -0.0076  0.000e+00
-0.199    21.1982     0.0000    -2.0494    -0.0006     0.0099  0.000e+00

If visible in the sample above, the presence of the ">" character is for formatting the metadata only. That character does not actually occur in the data.
The zeros associated with each column definition indicate the number of decimal places of the recorded values.
Entity_and_Attribute_Detail_Citation: U.S. Geological Survey
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Page C. Valentine
Contact_Position: Research Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: (508) 548-8700 x2239
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: pvalentine@usgs.gov
Resource_Description:
2017-030-FA_CTD.zip contains the 50 CTD data files and the FGDC CSDGM metadata in TXT, XML, and HTML formats.
Distribution_Liability:
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: TEXT
Format_Information_Content:
The zip file contains the CTD cast data and the associated FGDC CSDGM metadata.
Transfer_Size: 1
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
The first link is to download the data in a zip file. The second and third links are to the landing page of the data. The links go to the same place, one is the DOI designation of the publication.
Fees: none
Technical_Prerequisites:
The zip file contains CTD data in TEXT format. The user must have software capable of uncompressing the zip file and using the data files.
Metadata_Reference_Information:
Metadata_Date: 20200908
Metadata_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: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

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