de.pangaea.dataset986850 und dataset PANGAEA

info@pangaea.de

https://www.pangaea.de/ information pointOfContact 2026-02-13T06:05:31Z https://doi.pangaea.de/10.1594/PANGAEA.986850 2026-02-12T06:16:35 publication https://doi.org/10.1594/PANGAEA.986850 Dempsey, Britton

britton.dempsey@dal.ca

https://orcid.org/0009-0003-2353-0602 information author Kam, Kitty

kitty.kam@dal.ca

author Rondón, Anadiuska N

arondon@dal.ca

author Wallace, Douglas WR

douglas.wallace@dal.ca

http://oceanography.dal.ca/person/Wallace_Douglas.html information author Buchwald, Carolyn author PANGAEA

info@pangaea.de

https://www.pangaea.de/ information publisher tableDigital Seawater was collected for nitrate concentration and stable isotopic analyses between May 20th and May 25th, 2022 aboard RV Celtic Explorer in an area between 58 - 59 degrees N and 49 - 50 degrees W. Nitrate concentration samples were collected from the Niskin unfiltered into 15ml centrifuge tubes and immediately frozen at -20 degrees C. After the survey, these samples were then thawed to room temperature and analyzed using standard colorimetric protocols coupled with a continuous flow nutrient analyzer at the Canada Excellence Research Chairs (CERC) laboratory at Dalhousie University. Sampling for nitrate stable isotopic measurements was conducted by filtering seawater directly from the Niskin-rosette using 0.22 µm polyethersulfone (PES) syringe filters (VWR Cat. no. 76479-018) and collected into 60 mL HDPE bottles, which were then immediately frozen upright at -20 degrees C. Isotopic analyses were prepared in duplicate using the denitrifier method (McIlvin and Casciotti, 2011; doi:10.1021/ac1028984), and analyzed using isotope ratio mass spectrometery (IRMS) on a Thermo Delta V located in the Canada Excellence Research Chairs (CERC) laboratory at Dalhousie University. Samples with detectable nitrite (>0.1 µmol/l) concentrations were first treated with sulfamic acid to remove potential interference on the 15N-NO3 pool as the denitrifier method does not discriminate between nitrate or nitrite (Granger and Sigman, 2009; doi:10.1002/rcm.4307). Isotopic analyses were referenced against USGS32, USGS34, and IAEA-NO3 reference materials. completed Buchwald, Carolyn principalInvestigator Wallace, Douglas WR

douglas.wallace@dal.ca

http://oceanography.dal.ca/person/Wallace_Douglas.html information principalInvestigator Labrador Sea nitrate concentration in sea water stable nitrogen isotope (δ15N) theme 1995-01-01 creation PANGAEA

info@pangaea.de

https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-4.0: Creative Commons Attribution 4.0 International textTable und geoscientificInformation -49.61009999999999 -49.110000000000014 58.4833 58.8167 2022-05-20T16:47:00 2022-05-25T14:15:00 5.0 2000.0 Event label thematicClassification Latitude of event thematicClassification Longitude of event thematicClassification Date/Time of event thematicClassification DEPTH, water physicalMeasurement m m Nitrate physicalMeasurement Automated wet chemistry analyzer, SKALAR, SAN++ µmol/l µmol/l δ15N, nitrate physicalMeasurement Denitrifier method (McIlvin and Casciotti, 2011); measured with an isotope ratio mass spectrometer (IRMS), Thermo delta V; Vs. 15N of N2 in air ‰ air ‰ air δ15N, nitrate, standard deviation physicalMeasurement Denitrifier method (McIlvin and Casciotti, 2011); measured with an isotope ratio mass spectrometer (IRMS), Thermo delta V; Vs. 15N of N2 in air ± ± δ18O, nitrate physicalMeasurement Denitrifier method (McIlvin and Casciotti, 2011); measured with an isotope ratio mass spectrometer (IRMS), Thermo delta V; Vs. 18O of Vienna standard mean ocean water (VSMOW) ‰ ‰ δ18O, nitrate, standard deviation physicalMeasurement Denitrifier method (McIlvin and Casciotti, 2011); measured with an isotope ratio mass spectrometer (IRMS), Thermo delta V; Vs. 18O of Vienna standard mean ocean water (VSMOW) ± ± text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.986850?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: CE22009_4_Day (CTD_cast_8) * LATITUDE: 58.816700 * LONGITUDE: -49.110000 * DATE/TIME: 2022-05-20T16:47:00 * LOCATION: Labrador Sea * CAMPAIGN: CE22009 * BASIS: Celtic Explorer * METHOD/DEVICE: CTD/Rosette 2022-05-20T16:47:00 EVENT LABEL: CE22009_6_Day (CTD_cast_11) * LATITUDE: 58.816700 * LONGITUDE: -49.443400 * DATE/TIME: 2022-05-21T16:28:00 * LOCATION: Labrador Sea * CAMPAIGN: CE22009 * BASIS: Celtic Explorer * METHOD/DEVICE: CTD/Rosette 2022-05-21T16:28:00 EVENT LABEL: CE22009_8_Day (CTD_cast_17) * LATITUDE: 58.650000 * LONGITUDE: -49.610100 * DATE/TIME: 2022-05-23T12:14:00 * LOCATION: Labrador Sea * CAMPAIGN: CE22009 * BASIS: Celtic Explorer * METHOD/DEVICE: CTD/Rosette 2022-05-23T12:14:00 EVENT LABEL: CE22009_9_Day (CTD_cast_14) * LATITUDE: 58.650000 * LONGITUDE: -49.360100 * DATE/TIME: 2022-05-22T12:28:00 * LOCATION: Labrador Sea * CAMPAIGN: CE22009 * BASIS: Celtic Explorer * METHOD/DEVICE: CTD/Rosette 2022-05-22T12:28:00 EVENT LABEL: CE22009_11_Day (CTD_cast_21) * LATITUDE: 58.650000 * LONGITUDE: -49.110000 * DATE/TIME: 2022-05-24T11:40:00 * LOCATION: Labrador Sea * CAMPAIGN: CE22009 * BASIS: Celtic Explorer * METHOD/DEVICE: CTD/Rosette 2022-05-24T11:40:00 EVENT LABEL: CE22009_12_Day (CTD_cast_25) * LATITUDE: 58.483300 * LONGITUDE: -49.110000 * DATE/TIME: 2022-05-25T14:15:00 * LOCATION: Labrador Sea * CAMPAIGN: CE22009 * BASIS: Celtic Explorer * METHOD/DEVICE: CTD/Rosette 2022-05-25T14:15:00 References 2009-01-01 publication https://doi.org/10.1002/rcm.4307 Granger, Julie

jgranger@uconn.edu

https://orcid.org/0000-0001-9985-9242 information author Sigman, Daniel M

sigman@princeton.edu

https://orcid.org/0000-0002-7923-1973 information author documentDigital Rapid Communications in Mass Spectrometry 23(23) 3753-3762 References 2011-01-01 publication https://doi.org/10.1021/ac1028984 McIlvin, Matthew R author Casciotti, Karen L

kcasciotti@stanford.edu

https://orcid.org/0000-0002-5286-7795 information author documentDigital Analytical Chemistry 83(5) 1850-1856