Neretin, Lev N; Demidova, Tatyana P; Volkov, Igor I (1997): Some hydrophysical and hydrochemical parameters of the upper part of the hydrogen sulfide zone in the Black Sea, September 11-22, 1994 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.760614, Supplement to: Neretin, LN et al. (1997): Features of spatial variability of a hydrogen sulfide field in the Black Sea off the Northern Caucasus. Translated from Okeanologiya, 1997, 37(3), 365-372, Oceanology, 37(3), 332-338
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Abstract:
Features of spatial variability of hydrogen sulfide in the northeastern part of the Black Sea are estimated. Some technical aspects of H2S concentration determination in the anoxic zone are discussed: in its upper part at H2S concentration <30 µmol/l, the photometric method is recommended, while for deeper layers the iodometric method should be used. With linearity of vertical distribution of hydrogen sulfide and ammonium taken into account their vertical gradients are estimated as 0.49+/-0.04 µmol/m and 0.19+/-0.06 µmol/m respectively. It is shown that the upper boundary of the H2S layer corresponds to the isopycnal surface with Sigma_t = 16.19+/-0.05 arbitrary units. Special attention is paid to relationship of hydrogen sulfide distribution with hydrophysical features in the region under study, in particular in the coastal zone. It is shown that hydrodynamic conditions control spatial distribution of hydrogen sulfide. On the basis of isopycnal treatment of the H2S field existence of a coastal convergence zone is proved, and peculiarities are recognized of vertical circulation in the main Black Sea gyre and coastal anticyclonic eddies; here hydrogen sulfide serves as a tracer of hydrophysical mixing processes.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 43.635349 * Median Longitude: 38.071860 * South-bound Latitude: 42.150000 * West-bound Longitude: 36.230000 * North-bound Latitude: 44.660000 * East-bound Longitude: 39.760000
Minimum Elevation: -2160.0 m * Maximum Elevation: -520.0 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Neretin, Lev N | |||
| 2 | Latitude of event | Latitude | Neretin, Lev N | |||
| 3 | Longitude of event | Longitude | Neretin, Lev N | |||
| 4 | Elevation of event | Elevation | m | Neretin, Lev N | ||
| 5 | Zone boundary, upper | Zone bound u | m | Neretin, Lev N | of the H2S zone | |
| 6 | Position in the field of Sigma t | Pos S_t | arbitrary units | Neretin, Lev N | upper boundary of the H2S zone | |
| 7 | Vertical gradient of hydrogen sulfide concentration | H2S grad | µmol/m | Neretin, Lev N | Photometry | from the upper boundary of the H2S zone down to 500 m depth |
| 8 | Vertical gradient of ammonium concentration | NH4 grad | µmol/m | Neretin, Lev N | Titration | at the upper boundary of the H2S zone |
| 9 | Vertical gradient | Vert grad | arbitrary units/m | Neretin, Lev N | Calculated | of Sigma_t at the upper boundary (10 m) of the H2S zone |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
210 data points