2003 Helo Survey ISUS Nitrate Concentrations, Temperature, Salinity, and Density https://data.eol.ucar.edu/dataset/62.312 Summary 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. Identifiers * Local archive identifier: 62.312 * doi:10.5065/D6TT4P1W https://doi.org/10.5065/D6TT4P1W Versions 1.0 Citation Christensen, J., Melling, H., Christensen, J. 2009. SBI: 2003 Helo Survey ISUS Nitrate Concentrations, Temperature, Salinity, and Density. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/10.5065/D6TT4P1W Accessed 20 Apr 2024. Additional citation styles can be generated by entering the DOI at CrossCite (https://citation.crosscite.org/). Acknowledgement In addition to the citation reference and any other acknowledgements, please acknowledge NCAR/EOL in your publications with text such as: Data provided by NCAR/EOL under the sponsorship of the National Science Foundation. https://data.eol.ucar.edu/ Related projects * SBI: Western Arctic Shelf Basin Interactions Project https://data.eol.ucar.edu/project/SBI Additional information * Spatial Type: point * Frequency: no set schedule * Language: English Grant Code 0125313 ISO Topic Categories * oceans Categories * Aircraft * Arctic * CTD ocean cast * Hydrography * Oceanography * Water Chemistry * Water Sampling Platforms * Helicopter Instruments * Conductivity, Temperature, Depth - CTD * Spectrophotometers Sites * Arctic Ocean GCMD Science Keywords * EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE * EARTH SCIENCE > OCEANS > SALINITY/DENSITY > DENSITY * EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > POTENTIAL TEMPERATURE * EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRATE * EARTH SCIENCE > OCEANS > OCEAN PRESSURE > WATER PRESSURE * EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY Documentation * SW3-ISUS.PDF [144 KiB] https://data.eol.ucar.edu/file/download/41A56740B38/SW3-ISUS.PDF * Sw3loc4a.pdf [17 KiB] https://data.eol.ucar.edu/file/download/41A56740B39/Sw3loc4a.pdf * Sw3vit-4.csv [5 KiB] https://data.eol.ucar.edu/file/download/41A56740B3A/Sw3vit-4.csv Related links * companion: 62.292: 2003 Helo Survey CTD Data [Christensen, J. and H. Melling] https://data.eol.ucar.edu/dataset/62.292 * companion: 62.311: 2003 Helo Survey Nutrients and Oxygen Isotope Samples https://data.eol.ucar.edu/dataset/62.311 * companion: 62.292: 2003 Helo Survey CTD Data [Christensen, J. and H. Melling] https://data.eol.ucar.edu/dataset/62.292 * companion: 62.311: 2003 Helo Survey Nutrients and Oxygen Isotope Samples https://data.eol.ucar.edu/dataset/62.311 * companion: 62.313: 2004 Winter Survey Profiles of Temperature, Salinity, Density and Nutrients [Christensen, J.] https://data.eol.ucar.edu/dataset/62.313 * homepage: SBI Project Homepage https://www.eol.ucar.edu/field_projects/sbi * info: SBI Data Policy https://arctic.cbl.umces.edu/sbi/web-content/SBI%20Data%20Policy.htm * info: SBI Missions https://catalog.eol.ucar.edu/sbi/ * homepage: SBI Data Archive Home Page http://www.eol.ucar.edu/projects/sbi/ Temporal coverage * Begin datetime: 2003-04-01 00:00:00 * End datetime: 2003-04-15 23:59:59 Spatial coverage * Maximum (North) Latitude: 73.00 * Minimum (South) Latitude: 70.00 * Minimum (West) Longitude: -158.00 * Maximum (East) Longitude: -148.00 Primary contact information * pointOfContact: John P. Christensen https://data.eol.ucar.edu/contact/show/682 Additional contact information * author: John P. Christensen https://data.eol.ucar.edu/contact/show/682 * principalInvestigator: John P. Christensen https://data.eol.ucar.edu/contact/show/682 * author: Humfrey Melling https://data.eol.ucar.edu/contact/show/1278 * principalInvestigator: Humfrey Melling https://data.eol.ucar.edu/contact/show/1278 * originator: John P. Christensen https://data.eol.ucar.edu/contact/show/682 Alternate metadata formats * DataCite: https://data.eol.ucar.edu/dataset/62.312?format=datacite * ISO/TC 211: https://data.eol.ucar.edu/dataset/62.312?format=isotc211