Skip to main content
Dataset Overview | National Centers for Environmental Information (NCEI)

CTD data from Rhode Island Sound collected from R/V Hope Hudner in 2009-2010 in support of Rhode Island Ocean Special Area Management Plan (NCEI Accession 0109929)

browse graphicPreview graphic
The dataset consists of 173 CTD casts in Rhode Island and Block Island Sounds obtained during 4 surveys. The surveys were performed during 22-24 September 2009, 7-8 December 2009, 9-11 March 2010, and 16-18 June 2010. The casts cover the nearly the entire watercolumn from the surface to approximately 2 m above the bottom. The data were obtained with a SeaBird SBE19plus, which measures temperature, conductivity, pressure, optical backscatter, chlorophyll fluorescence, oxygen, and photosynthetically active radiation (PAR). All sensors were sampled at 4 Hz. The data were processed using the SeaBird data processing software suite, SBEDataProcessing-Win32. A low pass filter, with time constant of 1 s, was applied to the pressure record. Temperature and conductivity were low pass filtered with a 0.5 s filter time constant. To account for the relatively slower response of the temperature sensor, the temperature was advanced in time by 0.5 seconds relative to pressure. The oxygen voltage was advanced relative to pressure by 2 seconds for the September, December, and June survey casts and 5 seconds for the March survey casts. A correction for conductivity cell thermal mass effects was applied to the conductivity signal using the parameters recommended by SeaBird (alpha=0.04, 1/beta=8.0). A loop edit step was then applied, whereby portions of the cast in which the pressure was not changing sufficiently fast (0.1 dbar/s) were removed. This was followed by computation of salinity, sigma-t, and oxygen concentration. Finally, the data from the downcast were averaged into 1 dbar bins. Further details of the CTD data processing can be found in the header portion of the individual cast files. The final data files contain raw sensor values (1 dbar bin averages) plus a number of derived variables (e.g., salinity, sigma-t, oxygen). A full list of the output variables is contained in the header portion of the cast files.
  • Cite as: Ullman, David; University of Rhode Island > Graduate School of Oceanography (2013). CTD data from Rhode Island Sound collected from R/V Hope Hudner in 2009-2010 in support of Rhode Island Ocean Special Area Management Plan (NCEI Accession 0109929). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0109929. Accessed [date].
gov.noaa.nodc:0109929
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 2009-09-22 to 2010-06-18
Spatial Bounding Box Coordinates
West: -71.808
East: -70.881
South: 40.962
North: 41.426
Spatial Coverage Map
General Documentation
Publication Dates
  • publication: 2013-07-11
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
Purpose This dataset is available to the public for a wide variety of uses including scientific research and analysis.
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: Ullman, David; University of Rhode Island > Graduate School of Oceanography (2013). CTD data from Rhode Island Sound collected from R/V Hope Hudner in 2009-2010 in support of Rhode Island Ocean Special Area Management Plan (NCEI Accession 0109929). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0109929. Accessed [date].
Cited Authors
Contributors
Resource Providers
Publishers
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
Global Change Master Directory (GCMD) Science Keywords
Data Center keywords NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS Global Change Master Directory (GCMD) Data Center Keywords
Platform keywords NODC PLATFORM NAMES THESAURUS Global Change Master Directory (GCMD) Platform Keywords ICES/SeaDataNet Ship Codes
Instrument keywords NODC INSTRUMENT TYPES THESAURUS Global Change Master Directory (GCMD) Instrument Keywords
Place keywords NODC SEA AREA NAMES THESAURUS Global Change Master Directory (GCMD) Location Keywords
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: Ullman, David; University of Rhode Island > Graduate School of Oceanography (2013). CTD data from Rhode Island Sound collected from R/V Hope Hudner in 2009-2010 in support of Rhode Island Ocean Special Area Management Plan (NCEI Accession 0109929). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0109929. 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
  • 2013-07-11T21:01:20Z - NCEI Accession 0109929 v1.1 was published.
Output Datasets
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
Acquisition Information (collection)
Instrument
  • CTD
Platform
  • Hope F. Hudner
Last Modified: 2022-03-29T14:14:26Z
For questions about the information on this page, please email: ncei.info@noaa.gov