2003 Helo Survey Nutrients and Oxygen Isotope Samples https://data.eol.ucar.edu/dataset/62.311 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 each site, a Seabird CTD (either a SBE-19 or an SBE-25) and Satlantic 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 nitrate concentrations were made from the ice hole to either the sediment surface or to about 390 m and were binned into 0.5 dbar bins. Data from the vertical profiles of temperature, salinity, and density are contained in another dataset. Approximately 60 of seawater were collected from up to 8 sampling depths. Waters were subdivided into 30 ml for dissolved nutrient analyses and 20 ml for determination of the isotopic ratio of 18-O/16-O in the sea water. Samples were frozen for return to Maine. Nutrients (nitrate, nitrite, ammonium, inorganic phosphate, and dissolved silica) were determined by autoanalyzer at the Scripps Institute of Oceanography Nutrient Chemistry Laboratory according to World Ocean Circulation Experiment (WOCE) protocols. The oxygen isotope samples were determined at the University of Maine's Stable Isotope Laboratory with standard mean ocean water as standard. The data are in csv format. Identifiers * Local archive identifier: 62.311 * doi:10.5065/D62B8W34 https://doi.org/10.5065/D62B8W34 Versions 1.0 Citation Christensen, J., Melling, H., Christensen, J. 2009. SBI: 2003 Helo Survey Nutrients and Oxygen Isotope Samples. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/10.5065/D62B8W34 Accessed 29 Mar 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 * Nutrient * Oceanography * Stable Isotope * Water Chemistry * Water Sampling Platforms * Helicopter Instruments * Conductivity, Temperature, Depth - CTD Sites * Arctic Ocean GCMD Science Keywords * EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SILICATE * EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > AMMONIA * EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY * EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PHOSPHATE * EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC MATTER * EARTH SCIENCE > OCEANS > SALINITY/DENSITY > DENSITY * EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE * EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRITE * EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > STABLE ISOTOPES * EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRATE * EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > POTENTIAL TEMPERATURE Documentation * SW3BOTLE.PDF [99 KiB] https://data.eol.ucar.edu/file/download/41A557406B2/SW3BOTLE.PDF * Sw3loc4a.pdf [17 KiB] https://data.eol.ucar.edu/file/download/41A557406B3/Sw3loc4a.pdf * Sw3vit-4.csv [5 KiB] https://data.eol.ucar.edu/file/download/41A557406B4/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: 62.312: 2003 Helo Survey ISUS Nitrate Concentrations, Temperature, Salinity, and Density https://data.eol.ucar.edu/dataset/62.312 * companion: 62.292: 2003 Helo Survey CTD Data [Christensen, J. and H. Melling] https://data.eol.ucar.edu/dataset/62.292 * companion: 62.312: 2003 Helo Survey ISUS Nitrate Concentrations, Temperature, Salinity, and Density https://data.eol.ucar.edu/dataset/62.312 * info: SBI Data Policy https://arctic.cbl.umces.edu/sbi/web-content/SBI%20Data%20Policy.htm * homepage: SBI Data Archive Home Page http://www.eol.ucar.edu/projects/sbi/ * homepage: SBI Project Homepage https://www.eol.ucar.edu/field_projects/sbi * info: SBI Missions https://catalog.eol.ucar.edu/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/62.311?format=datacite * ISO/TC 211: https://data.eol.ucar.edu/dataset/62.311?format=isotc211