Dataset Overview | National Centers for Environmental Information (NCEI)

Water temperature, conductivity, and other parameters from CTD and ADCP below ice shelf in the Ross Sea from 2015-01-09 to 2015-01-19 (NCEI Accession 0176082)

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This dataset contains profiles of water conductivity, temperature, pressure, and derived practical salinity in the Ross Ice Shelf cavity near the Whillans Ice Stream grounding zone. At this site, the water thickness in the cavity is 10.35 m. We also present mean and standard deviation of current speed at mid-depth, roughly 5 m below the ice-shelf base. The ice shelf at this site was 755 m thick. Data are in text format.

Dataset Citation

Cite as: Begeman, Carolyn Branecky; Mikucki, Jill A.; Hodson, Timothy O. (2018). Water temperature, conductivity, and other parameters from CTD and ADCP below ice shelf in the Ross Sea from 2015-01-09 to 2015-01-19 (NCEI Accession 0176082). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0176082. Accessed [date].

Dataset Identifiers

ISO 19115-2 Metadata

gov.noaa.nodc:0176082

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Download Data	HTTPS (download) Navigate directly to the URL for data access and direct download. FTP (download) These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP).
Distribution Formats	Originator data format
Ordering Instructions	Contact NCEI for other distribution options and instructions.
Distributor	NOAA National Centers for Environmental Information +1-301-713-3277 NCEI.Info@noaa.gov
Dataset Point of Contact	NOAA National Centers for Environmental Information ncei.info@noaa.gov

Time Period	2015-01-09 to 2015-01-19
Spatial Bounding Box Coordinates	West: -163.61258 East: -163.61257 South: -84.33529 North: -84.33528
Spatial Coverage Map

General Documentation

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Descriptive Information
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Publication Dates	publication: 2018-09-18
Data Presentation Form	Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status	Complete - production of the data has been completed Historical archive - data has been stored in an offline storage facility
Data Update Frequency	As needed
Supplemental Information	Submission Package ID: GETAGA
Purpose	These data were collected to investigate the oceanography and biology of a grounding zone setting as part of the Whillans Ice Stream Subglacial Access Research Drilling (WISSARD) Project.
Use Limitations	accessLevel: Public Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.

Dataset Citation	Cite as: Begeman, Carolyn Branecky; Mikucki, Jill A.; Hodson, Timothy O. (2018). Water temperature, conductivity, and other parameters from CTD and ADCP below ice shelf in the Ross Sea from 2015-01-09 to 2015-01-19 (NCEI Accession 0176082). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0176082. Accessed [date].
Cited Authors	Begeman, Carolyn Branecky Los Alamos National Laboratory (LANL) Mikucki, Jill A. Hodson, Timothy O.
Resource Providers	Carolyn B. Begeman Los Alamos National Laboratory (LANL) Los Alamos National Laboratory (LANL)
Points of Contact	Carolyn B. Begeman Los Alamos National Laboratory (LANL)
Publishers	NOAA National Centers for Environmental Information
Acknowledgments	Related Funding Agency: National Science Foundation

Theme keywords	NODC DATA TYPES THESAURUS CONDUCTIVITY CURRENT METER - DIRECTION CURRENT METER - SPEED HYDROSTATIC PRESSURE SALINITY WATER TEMPERATURE NODC OBSERVATION TYPES THESAURUS in situ physical WMO_CategoryCode oceanography Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > OCEANS > OCEAN CIRCULATION > OCEAN CURRENTS EARTH SCIENCE > OCEANS > OCEAN PRESSURE > WATER PRESSURE EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > CONDUCTIVITY EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY
Data Center keywords	NODC SUBMITTING INSTITUTION NAMES THESAURUS Los Alamos National Laboratory Global Change Master Directory (GCMD) Data Center Keywords DOE/LANL > LOS ALAMOS NATIONAL LABORATORY, DEPARTMENT OF ENERGY
Instrument keywords	NODC INSTRUMENT TYPES THESAURUS ADCP CTD Global Change Master Directory (GCMD) Instrument Keywords ADCP > Acoustic Doppler Current Profiler CTD > Conductivity, Temperature, Depth
Place keywords	NODC SEA AREA NAMES THESAURUS Ross Sea Global Change Master Directory (GCMD) Location Keywords OCEAN > SOUTHERN OCEAN > ROSS SEA
Project keywords	NODC PROJECT NAMES THESAURUS UNITED STATES ANTARCTIC RESEARCH PROGRAM (USARP) Global Change Master Directory (GCMD) Project Keywords USARP > U.S. Antarctic Research Program Provider Keywords Whillans Ice Stream Subglacial Access Research Drilling (WISSARD)
Keywords	NCEI ACCESSION NUMBER 0176082

Use Constraints	Cite as: Begeman, Carolyn Branecky; Mikucki, Jill A.; Hodson, Timothy O. (2018). Water temperature, conductivity, and other parameters from CTD and ADCP below ice shelf in the Ross Sea from 2015-01-09 to 2015-01-19 (NCEI Accession 0176082). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0176082. Accessed [date].
Access Constraints	Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Fees	In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.

Lineage information for: dataset
Processing Steps	2018-09-18T17:15:14Z - NCEI Accession 0176082 v1.1 was published.
Output Datasets	NCEI Accession 0176082 v1.1 NCEI Accession 0176082 v1.1 (download) published 2018-09-18T17:15:14Z

Lineage information for: dataset
Processing Steps	Parameter or Variable: CONDUCTIVITY (measured); Units: microsiemens/cm; Observation Category: in situ; Sampling Instrument: CTD - specific model; Sampling and Analyzing Method: Sea-bird Electronics 19plus V2 sampling at a frequency of 4 Hz. Parameter or Variable: TEMPERATURE - WATER [WATER TEMPERATURE] (measured); Units: degrees Celsius; Observation Category: in situ; Sampling Instrument: CTD - specific model; Sampling and Analyzing Method: Sea-bird Electronics 19plus V2 sampling at a frequency of 4 Hz. Parameter or Variable: PRESSURE - WATER [HYDROSTATIC PRESSURE] (measured); Units: decibar; Observation Category: in situ; Sampling Instrument: CTD - specific model; Sampling and Analyzing Method: Sea-bird Electronics 19plus V2 sampling at a frequency of 4 Hz. Parameter or Variable: SALINITY (measured); Units: psu; Observation Category: in situ; Sampling Instrument: CTD - specific model; Sampling and Analyzing Method: Sea-bird Electronics 19plus V2 sampling at a frequency of 4 Hz. Practical salinity is calculated from conductivity, temperature and pressure using the International Thermodynamic Equation of Seawater (International Oceanographic Commission, 2010) coded in Gibbs Seawater (GSW) Matlab toolbox.. Parameter or Variable: CURRENT METER - SPEED (calculated); Units: m/s; Observation Category: in situ; Sampling Instrument: ADCP; Sampling and Analyzing Method: Current speed and direction were measured with Nortek Aquadopp 2 MHz Acoustic Doppler Current Profiler. Acoustic backscatter levels were very weak due to low concentrations of suspended particulate matter. Measurements were made at 1 Hz then only the first range bin was low pass filtered at 2 mHz for an interval of 5-6 hours with the sensor stationed ~5 m below the ice shelf base near the middle of the water column.; Data Quality Method: Since current variability is not expected on very short timescales, the average standard deviation of velocity measurements over 10-minute intervals is taken to be an in situ estimate of instrumental noise, equal to 0.2 cm/s. We only analyzed data collected when the ADCP was rotating less than 2° s^-1 and the current orientation was changing less than 2° s^-1 during intervals of at least 30 s.. Parameter or Variable: CURRENT METER - DIRECTION (calculated); Units: degrees true; Observation Category: in situ; Sampling Instrument: ADCP; Sampling and Analyzing Method: Current speed and direction were measured with Nortek Aquadopp 2 MHz Acoustic Doppler Current Profiler. Acoustic backscatter levels were very weak due to low concentrations of suspended particulate matter. Measurements were made at 1 Hz then only the first range bin was low pass filtered at 2 mHz for an interval of 5-6 hours with the sensor stationed ~5 m below the ice shelf base near the middle of the water column.; Data Quality Method: Since current variability is not expected on very short timescales, the average standard deviation of velocity measurements over 10-minute intervals is taken to be an in situ estimate of instrumental noise, equal to 0.2 cm/s. We only analyzed data collected when the ADCP was rotating less than 2° s^-1 and the current orientation was changing less than 2° s^-1 during intervals of at least 30 s..

Lineage information for: dataset

Processing Steps

Parameter or Variable: CONDUCTIVITY (measured); Units: microsiemens/cm; Observation Category: in situ; Sampling Instrument: CTD - specific model; Sampling and Analyzing Method: Sea-bird Electronics 19plus V2 sampling at a frequency of 4 Hz.
Parameter or Variable: TEMPERATURE - WATER [WATER TEMPERATURE] (measured); Units: degrees Celsius; Observation Category: in situ; Sampling Instrument: CTD - specific model; Sampling and Analyzing Method: Sea-bird Electronics 19plus V2 sampling at a frequency of 4 Hz.
Parameter or Variable: PRESSURE - WATER [HYDROSTATIC PRESSURE] (measured); Units: decibar; Observation Category: in situ; Sampling Instrument: CTD - specific model; Sampling and Analyzing Method: Sea-bird Electronics 19plus V2 sampling at a frequency of 4 Hz.
Parameter or Variable: SALINITY (measured); Units: psu; Observation Category: in situ; Sampling Instrument: CTD - specific model; Sampling and Analyzing Method: Sea-bird Electronics 19plus V2 sampling at a frequency of 4 Hz. Practical salinity is calculated from conductivity, temperature and pressure using the International Thermodynamic Equation of Seawater (International Oceanographic Commission, 2010) coded in Gibbs Seawater (GSW) Matlab toolbox..
Parameter or Variable: CURRENT METER - SPEED (calculated); Units: m/s; Observation Category: in situ; Sampling Instrument: ADCP; Sampling and Analyzing Method: Current speed and direction were measured with Nortek Aquadopp 2 MHz Acoustic Doppler Current Profiler. Acoustic backscatter levels were very weak due to low concentrations of suspended particulate matter. Measurements were made at 1 Hz then only the first range bin was low pass filtered at 2 mHz for an interval of 5-6 hours with the sensor stationed ~5 m below the ice shelf base near the middle of the water column.; Data Quality Method: Since current variability is not expected on very short timescales, the average standard deviation of velocity measurements over 10-minute intervals is taken to be an in situ estimate of instrumental noise, equal to 0.2 cm/s. We only analyzed data collected when the ADCP was rotating less than 2° s^-1 and the current orientation was changing less than 2° s^-1 during intervals of at least 30 s..
Parameter or Variable: CURRENT METER - DIRECTION (calculated); Units: degrees true; Observation Category: in situ; Sampling Instrument: ADCP; Sampling and Analyzing Method: Current speed and direction were measured with Nortek Aquadopp 2 MHz Acoustic Doppler Current Profiler. Acoustic backscatter levels were very weak due to low concentrations of suspended particulate matter. Measurements were made at 1 Hz then only the first range bin was low pass filtered at 2 mHz for an interval of 5-6 hours with the sensor stationed ~5 m below the ice shelf base near the middle of the water column.; Data Quality Method: Since current variability is not expected on very short timescales, the average standard deviation of velocity measurements over 10-minute intervals is taken to be an in situ estimate of instrumental noise, equal to 0.2 cm/s. We only analyzed data collected when the ADCP was rotating less than 2° s^-1 and the current orientation was changing less than 2° s^-1 during intervals of at least 30 s..

Acquisition Information (collection)
Instrument	ADCP CTD

Last Modified: 2023-05-12T15:07:38Z
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Water temperature, conductivity, and other parameters from CTD and ADCP below ice shelf in the Ross Sea from 2015-01-09 to 2015-01-19 (NCEI Accession 0176082)

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