Wald, Tanja; Fripiat, François; Foreman, Alan; Tanhua, Toste; Sisma-Ventura, Guy; Ryu, Yeongjun; Marconi, Dario; Sigman, Daniel M; Haug, Gerald H; Martínez-García, Alfredo: Full-depth Mediterranean nitrate δ15N and δ18O data and TN δ15N data [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.965704 (dataset in review)
Abstract:
Nitrate δ15N (vs. AIR) and δ18O (vs. VSMOW) measurements have been performed using the denitrifier method (Weigand et al., 2016) on seawater samples from the cruises MSM72 (2018), TalPro (2016) and HaiSec45 (2021). Samples with detectable amount of nitrite has been treated with sulfamic acid before isotope analysis (Granger and Sigman, 2009). This dataset provides full-depth nitrate-only δ15N and δ18O profiles across the Mediterranean Sea which shows a basin-wide 15N depletion relative to the global ocean with lowest values in the eastern basin. In addition, total nitrogen (TN) concentrations and δ15N were analyzed on selected MSM72 stations using the persulfate-denitrifier method (Knapp et al., 2005).
Keyword(s):
Supplement to:
Wald, Tanja; et al. (in review): Origins of the nitrate 15N depletion in the Mediterranean Sea.
References:
Granger, Julie; Sigman, Daniel M (2009): Removal of nitrite with sulfamic acid for nitrate N and O isotope analysis with the denitrifier method. Rapid Communications in Mass Spectrometry, 23(23), 3753-3762, https://doi.org/10.1002/rcm.4307
Knapp, Angela N; Sigman, Daniel M; Lipschultz, Fredric (2005): N isotopic composition of dissolved organic nitrogen and nitrate at the Bermuda Atlantic Time‐series Study site. Global Biogeochemical Cycles, 19(1), 2004GB002320, https://doi.org/10.1029/2004GB002320
Weigand, Mira Alexandra; Foriel, Julien; Barnett, Bruce; Oleynik, Sergey; Sigman, Daniel M (2016): Updates to instrumentation and protocols for isotopic analysis of nitrate by the denitrifier method. Rapid Communications in Mass Spectrometry, 30(12), 1365-1383, https://doi.org/10.1002/rcm.7570
Coverage:
Median Latitude: 38.283801 * Median Longitude: 10.669156 * South-bound Latitude: 32.949833 * West-bound Longitude: -5.668940 * North-bound Latitude: 43.050000 * East-bound Longitude: 34.754667
Date/Time Start: 2016-08-19T11:44:00 * Date/Time End: 2021-03-10T05:12:00
Minimum DEPTH, water: 2.19 m * Maximum DEPTH, water: 4612.20 m
Event(s):
HaiSec45_G05 * Latitude: 33.346000 * Longitude: 33.906833 * Date/Time: 2021-03-10T05:12:00 * Campaign: HaiSec45 * Basis: Bat Galim * Method/Device: CTD/Rosette (CTD-RO)
HaiSec45_H04 * Latitude: 32.949833 * Longitude: 34.754667 * Date/Time: 2021-03-09T15:40:00 * Campaign: HaiSec45 * Basis: Bat Galim * Method/Device: CTD/Rosette (CTD-RO)
HaiSec45_H05 * Latitude: 32.999500 * Longitude: 34.501000 * Date/Time: 2021-03-09T18:01:00 * Campaign: HaiSec45 * Basis: Bat Galim * Method/Device: CTD/Rosette (CTD-RO)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Wald, Tanja | |||
| 2 | Date/Time of event | Date/Time | Wald, Tanja | |||
| 3 | Latitude of event | Latitude | Wald, Tanja | |||
| 4 | Longitude of event | Longitude | Wald, Tanja | |||
| 5 | Sample code/label | Sample label | Wald, Tanja | Sample label (Station) | ||
| 6 | Sample code/label | Sample label | Wald, Tanja | Sample label (Cast) | ||
| 7 | Sample code/label | Sample label | Wald, Tanja | Sample label (Niskin) | ||
| 8 | Sample code/label | Sample label | Wald, Tanja | Internal label | ||
| 9 | Pressure, water | Press | dbar | Wald, Tanja | ||
| 10 | DEPTH, water | Depth water | m | Wald, Tanja | Calculated | Geocode – Calculated from pressure |
| 11 | Nitrate | [NO3]- | µmol/kg | Wald, Tanja | ||
| 12 | δ15N, nitrate | δ15N NO3 | ‰ air | Wald, Tanja | Denitrifier method according to Weigand et al. (2016) | vs air |
| 13 | δ18O, nitrate | δ18O NO3 | ‰ | Wald, Tanja | Denitrifier method according to Weigand et al. (2016) | vs VSMOW |
| 14 | Nitrogen, total | TN | µmol/kg | Wald, Tanja | Persulfate-denitrifier method according to Knapp et al. (2005) | |
| 15 | δ15N, total nitrogen | δ15N TN | ‰ air | Wald, Tanja | Persulfate-denitrifier method according to Knapp et al. (2005) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
8926 data points
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