CTD (conductivity-temperature-depth) data collected on Stellwagen Bank during U.S. Geological Survey field activity 2016-038-FA, aboard the R/V Auk, Sept. 16 and 19, 2016

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Page C. Valentine
Publication_Date: 2020
Title:

CTD (conductivity-temperature-depth) data collected on Stellwagen Bank during U.S. Geological Survey field activity 2016-038-FA, aboard the R/V Auk, Sept. 16 and 19, 2016

Edition: 1.0
Geospatial_Data_Presentation_Form: text file for water column profile
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P91MNNSN

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/P91MNNSN
Online_Linkage:

https://cmgds.marine.usgs.gov/data/field-activity-data/2016-038-FA/

Larger_Work_Citation:

Citation_Information:

Originator: Page C. Valentine
Originator: VeeAnn A. Cross
Publication_Date: 2020
Title:

Station information, Seabed and Sample Imagery, and CTD Instrument Data Collected on Stellwagen Bank in September, 2016, U.S. Geological Survey Field Activity 2016-038-FA

Edition: 1.0
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P91MNNSN

Publication_Information:

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

Other_Citation_Details:

Suggested citation: Valentine, P.C., and Cross, V.A., 2020, Station information, Seabed and Sample Imagery, and CTD Instrument Data Collected on Stellwagen Bank in September, 2016, U.S. Geological Survey Field Activity 2016-038-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P91MNNSN .

Online_Linkage: https://doi.org/10.5066/P91MNNSN
Online_Linkage:

https://cmgds.marine.usgs.gov/data/field-activity-data/2016-038-FA/

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 41 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=2016-038-FA . The grain-size analyses of the sediment samples collected during this field activity is available in a separate publication (Valentine and Cross, 2019; link available from the cross-reference citation).

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20160916
Ending_Date: 20160919

Currentness_Reference:

Ground condition of when data were collected. There were two days of data collection. September 16 and 19, 2016.

Status:

Progress: complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -70.458220
East_Bounding_Coordinate: -70.139840
North_Bounding_Coordinate: 42.421230
South_Bounding_Coordinate: 42.171450

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:6fd0b9f7-ec6c-49c2-91bf-a0435c3ee06c

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: National Oceanic and Atmospheric Administration
Theme_Keyword: NOAA
Theme_Keyword: SEABed Observation and Sampling System
Theme_Keyword: SEABOSS
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/

Cross_Reference:

Citation_Information:

Originator: Page C. Valentine
Originator: VeeAnn A. Cross
Publication_Date: 2019
Title:

Location and analyses of sediment samples collected on Stellwagen Bank off Boston, Massachusetts from November 5, 2013 to April 30, 2019 on U.S. Geological Survey field activities

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9FWFLPD

Publication_Information:

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

Other_Citation_Details:

This publication includes the sediment sample analyses information associated with this field activity and 19 other field activities.

Online_Linkage: https://doi.org/10.5066/P9FWFLPD
Online_Linkage:

https://www.sciencebase.gov/catalog/item/5d95153ee4b0c4f70d10a4f7

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 frame. 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 frame. All data (downcast, drift, and upcast) are included. All SEABOSS stations on the cruise have a CTD record. There are a total of 41 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 (2016-038-FA_station_data_summary 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 one-second intervals with a horizontal accuracy of 10 meters. The navigation antenna is located 5.3 meters forward of the SEABOSS deployment location. This offset was not accounted for in the navigation acquisition (navigation fixes represent antenna location). The SEABOSS may also drift away from the survey vessel when deployed to the sea floor.

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. The pressure gauge accuracy is 0.1% of water depth as stated by the manufacturer.

Lineage:

Process_Step:

Process_Description:

These data were collected with a Sea-Bird CTD (conductivity, temperature, depth) instrument - an 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 (CHL is Chlorophyll and TURB is turbidity):

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 Siemens per meter (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 parts per million (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

The 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: 2016
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 frame. 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 2016-038-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: 2016
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

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: 6378137.000000
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 are included in an ASCII text file with an eleven-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 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 - 1990 International Temperature Scale), 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 4521

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

-0.039    17.1519    14.9390    10.1498    -0.0113    -0.0092  0.000e+00
-0.041    17.1532    14.9367    10.1478    -0.0113    -0.0088  0.000e+00
-0.041    17.1519    14.9367    10.1481    -0.0075    -0.0095  0.000e+00
-0.039    17.1517    14.9366    10.1481    -0.0090    -0.0084  0.000e+00
-0.038    17.1530    14.9252    10.1391    -0.0106    -0.0080  0.000e+00
-0.040    17.1509    14.9003    10.1206    -0.0098    -0.0092  0.000e+00
-0.043    17.1602    14.8955    10.1150    -0.0090    -0.0088  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:

2016-038-FA_CTD.zip contains the 41 CTD data files and the FGDC CSDGM metadata in XML format.

Distribution_Liability:

Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. 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:

Network_Address:

Network_Resource_Name:

https://cmgds.marine.usgs.gov/data/field-activity-data/2016-038-FA/data/chemistry/2016-038-FA_CTD.zip

Network_Resource_Name: https://doi.org/10.5066/P91MNNSN
Network_Resource_Name:

https://cmgds.marine.usgs.gov/data/field-activity-data/2016-038-FA/

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 last two 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: 20240318
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: whsc_data_contact@usgs.gov
Contact_Instructions:

The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240318)

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

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