2003 Helo Survey ISUS Nitrate Concentrations, Temperature, Salinity, and Density [Christensen, J. and H. Melling]

As part of the Shelf-Basin Interactions (SBI) project, early spring sampling was performed in the eastern area of the SBI study area using aircraft. Flights began on 1 April 2003 and finished on 15 April. During this time, we sampled 42 sites (49 Conductivity Temperature Depth (CTD) casts) on a series of 5 transect lines which bracketed and were parallel to the SBI current meter mooring line located at 152 W longitude. Stations were about 10 km apart along each transect line. A map of the achieved sampling sites is available (file: Sw3loc4a.pdf) and station locations, sampling dates and times are found in the file, Sw3vit-4.csv. At sites 10 through 49, a Seabird CTD (SBE-25) and Satlantic In-Situ Ultraviolet Spectrophotometer (ISUS) nitrate analyzer with a water sampling bottle was deployed through an 8 inch hole augured through the pack-ice. Continuous profiles of pressure, temperature, salinity, and ISUS-sensed nitrate concentrations were made from the ice hole to either the sediment surface or to about 390 m. The ISUS was not used at CTD casts 1 through 9. CTD data were processed with Seabird software (Seasoft) and the data binned into 0.5 dbar layers. All basic CTD data are contained in another dataset as well as the nutrient data collected from the water sampling bottles. The ISUS samples at a relatively slow rate (3.5 Hz), and even though repeated vertical profiles were collected at each site, not all pressure bins contained ISUS measurements. Data herein include basic CTD data as well as the ISUS data (in its respective bin) converted to nitrate concentration, and the continuous ISUS nitrate profiles constructed by linearly interpolating binned data between two vertically adjacent ISUS averages. A complete description of the evaluation procedure for these ISUS data is being prepared for publication, so data herein are considered to be in draft form. The data are in csv format.

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Temporal Range

  • Begin:  2003-04-01T00:00:00Z
    End:  2003-04-15T23:59:59Z


Resource Type dataset
Temporal Range Begin 2003-04-01T00:00:00Z
Temporal Range End 2003-04-15T23:59:59Z
Temporal Resolution N/A
Bounding Box North Lat 73.00000
Bounding Box South Lat 70.00000
Bounding Box West Long -158.00000
Bounding Box East Long -148.00000
Spatial Representation grid
Spatial Resolution N/A
Related Links

Documentation #1 : SW3-ISUS.PDF

Documentation #2 : Sw3loc4a.pdf

Documentation #3 : Sw3vit-4.csv

62.292 : is a companion to dataset 62.312

62.311 : is a companion to dataset 62.312

62.292 : is a companion to dataset 62.312

62.311 : is a companion to dataset 62.312

62.313 : is a companion to dataset 62.312

Additional Information N/A
Resource Format N/A
Standardized Resource Format UNDEFINED FORMAT
Asset Size 1 MB
Legal Constraints


Access Constraints none
Software Implementation Language N/A

Resource Support Name EOL Data Support
Resource Support Email eol-datahelp@ucar.edu
Resource Support Organization UCAR/NCAR - Earth Observing Laboratory
Distributor UCAR/NCAR - Earth Observing Laboratory
Metadata Contact Name EOL Data Support
Metadata Contact Email eol-datahelp@ucar.edu
Metadata Contact Organization UCAR/NCAR - Earth Observing Laboratory

Author John P. Christensen
Humfrey Melling
Publisher UCAR/NCAR - Earth Observing Laboratory
Publication Date 2009-03-11T13:54:00
Digital Object Identifier (DOI) https://doi.org/doi:10.5065/D6TT4P1W
Alternate Identifier 62.312
Resource Version 1.0
Topic Category oceans
Progress completed
Metadata Date 2021-10-01T16:05:10Z
Metadata Record Identifier edu.ucar.eol::62.312
Metadata Language eng; USA
Suggested Citation John P. Christensen, Humfrey Melling. (2009). 2003 Helo Survey ISUS Nitrate Concentrations, Temperature, Salinity, and Density [Christensen, J. and H. Melling]. 1.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/doi:10.5065/D6TT4P1W. Accessed 07 December 2023.

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