gov.noaa.nodc:0176082 eng utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NOAA Contact Information Information for contacts at NCEI. information custodian 2026-07-10T19:50:12Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) 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) 2018-09-18 publication 2018-09-12 creation NOAA National Centers for Environmental Information gov.noaa.nodc:0176082 NCEI Archive Management System 0176082 NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information publisher Carolyn B. Begeman Los Alamos National Laboratory (LANL) carolynbegeman@gmail.com https://lanl.gov/ HTTPS Los Alamos National Laboratory (LANL) website Institution web page information resourceProvider Los Alamos National Laboratory (LANL) https://lanl.gov/ HTTPS Los Alamos National Laboratory (LANL) website Institution web page information resourceProvider Carolyn Branecky Begeman Los Alamos National Laboratory (LANL) carolyn.begeman@gmail.com https://lanl.gov/ HTTPS Los Alamos National Laboratory (LANL) website Institution web page information pointOfContact Begeman, Carolyn Branecky Los Alamos National Laboratory (LANL) https://lanl.gov/ HTTPS Los Alamos National Laboratory (LANL) website Institution web page information author Mikucki, Jill A. author Hodson, Timothy O. author tableDigital 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. 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. Funding Agency: National Science Foundation completed historicalArchive NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information pointOfContact asNeeded https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0176082 Preview graphic PNG 0176082 NCEI ACCESSION NUMBER 2018-09-11 publication CONDUCTIVITY CURRENT METER - DIRECTION CURRENT METER - SPEED HYDROSTATIC PRESSURE SALINITY WATER TEMPERATURE theme NODC DATA TYPES THESAURUS ADCP CTD instrument NODC INSTRUMENT TYPES THESAURUS in situ physical theme NODC OBSERVATION TYPES THESAURUS Los Alamos National Laboratory dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS UNITED STATES ANTARCTIC RESEARCH PROGRAM (USARP) project NODC PROJECT NAMES THESAURUS Ross Sea place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication DOE/LANL > LOS ALAMOS NATIONAL LABORATORY, DEPARTMENT OF ENERGY dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian USARP > U.S. Antarctic Research Program project Global Change Master Directory (GCMD) Project Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Whillans Ice Stream Subglacial Access Research Drilling (WISSARD) project Provider 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 theme Global Change Master Directory (GCMD) Science Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian ADCP > Acoustic Doppler Current Profiler CTD > Conductivity, Temperature, Depth instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian OCEAN > SOUTHERN OCEAN > ROSS SEA place Global Change Master Directory (GCMD) Location Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian GETAGA Send2NCEI Submission Package ID accessLevel: public otherRestrictions 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]. 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. otherRestrictions 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. Begeman, C. B., Tulaczyk, S. M., Marsh, O. J., Mikucki, J. A., Stanton, T. P., Hodson, T. O., Siegfried, M. R., Powell, R. D., Christianson, K., & King, M. A. (2018). Ocean Stratification and Low Melt Rates at the Ross Ice Shelf Grounding Zone. Journal of Geophysical Research: Oceans, 123(10), 7438–7452. https://doi.org/10.1029/2018jc013987 2018-10 publication International DOI Foundation (IDF) https://doi.org/10.1029/2018jc013987 https://doi.org/10.1029/2018jc013987 HTTPS https://doi.org/10.1029/2018jc013987 related journal article information Begeman, Carolyn Branecky Department of Earth and Planetary Sciences University of California Santa Cruz CA USA author Tulaczyk, Slawek M. Department of Earth and Planetary Sciences University of California Santa Cruz CA USA author Marsh, Oliver J. Gateway Antarctica University of Canterbury Christchurch New Zealand author Mikucki, Jill A. Department of Microbiology University of Tennessee, Knoxville Knoxville TN USA author Stanton, Timothy P. Department of Oceanography U.S. Naval Postgraduate School Monterey CA USA author Hodson, Timothy O. Department of Geology and Environmental Geosciences Northern Illinois University DeKalb IL USA author Siegfried, Matthew R. Department of Geophysics Stanford University Stanford CA USA author Powell, Ross D. Department of Geology and Environmental Geosciences Northern Illinois University DeKalb IL USA author Christianson, Knut Department of Earth and Space Sciences University of Washington Seattle WA USA author King, Matt A. Surveying and Spatial Sciences, School of Land and Food University of Tasmania Hobart Tasmania Australia author American Geophysical Union (AGU) publisher documentDigital JGR Oceans 123(10) ISSN 2169-9275, ISSN 2169-9291, pp. 7438-7452 crossReference sciencePaper eng; USA utf8 environment oceans -163.61258 -163.61257 -84.33529 -84.33528 2015-01-09 2015-01-19 NOAA National Centers for Environmental Information +1-301-713-3277 ncei.info@noaa.gov pointOfContact 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. Contact NCEI for other distribution options and instructions. Originator data format 0.26 https://www.ncei.noaa.gov/archive/accession/0176082 HTTPS Web browser NCEI Dataset Landing Page Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/oas/176082 HTTPS Web browser Descriptive Information Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/download/176082 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0124/0176082/ FTP Any FTP client FTP 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). download dataset NCEI Accession 0176082 v1.1 was published. 2018-09-18T17:15:14Z NCEI Accession 0176082 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0176082/1.1 HTTPS NCEI Accession 0176082 v1.1 published 2018-09-18T17:15:14Z download dataset 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. asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian ADCP ADCP Acoustic Doppler Current Profiler The Acoustic Doppler Current Profiler (ADCP) measures currents beneath a ship while underway. Sound signals sent from the moving ship bounce back to receivers aboard the ship. This provides a profile of water movement relative to the ship-precise modern navigation, allowing the ship's motion to be subtracted from the data. These devices are also used on moorings and profilers and, along with acoustic backscattering, measure animal biomass. Particles in the path of the sound waves, mostly plankton, reflect a small part of the sound energy back toward receivers, allowing researchers to make remote estimates of the sizes and numbers of animals present in the water column. Before the 1970's, the most technologically advanced instrument used to measure water velocity was known as a Doppler speed log. This evolved into the first commercial ADCP, produced in the mid-1970's, which used averaging. Later in the 1970's, the first vessel-mounted ADCP was developed to measure water velocity more accurately and to allow measurement in range cells over a depth profile. As instruments evolved, so did new techniques in Doppler signal processing. Initially, Doppler speed logs used simple analog signal processing methods, which are still used in some commercial speed logs today. However, the first ADCPs incorporated analog-to-digital signal conversion over a narrow communication bandwidth. Around 1990, this technique was developed into broadband signal processing. Since then, broadband ADCPs have been able to generate very accurate, real-time velocity measurements. CTD CTD Conductivity-Temperature-Depth probe