Citation:

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

Name: Some hydrophysical and hydrochemical parameters of the upper part of the hydrogen sulfide zone in the Black Sea, September 11-22, 1994
Published: 1997
License: https://creativecommons.org/licenses/by/3.0/

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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):

Akvan94-1003 * Latitude: 44.570000 * Longitude: 36.500000 * Elevation: -550.0 m * Location: Black Sea * Method/Device: Multiple investigations (MULT)

Akvan94-1004 * Latitude: 44.490000 * Longitude: 36.230000 * Elevation: -700.0 m * Location: Black Sea * Method/Device: Multiple investigations (MULT)

Akvan94-1005 * Latitude: 44.320000 * Longitude: 36.230000 * Elevation: -1250.0 m * Location: Black Sea * Method/Device: Multiple investigations (MULT)

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

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Event	2 Latitude	3 Longitude	4 Elevation [m]	5 Zone bound u [m]	6 Pos S_t [arbitrary units]	7 H2S grad [µmol/m]	8 NH4 grad [µmol/m]	9 Vert grad [arbitrary units/m]
Akvan94-1003	44.57	36.50	-550	150	16.19	0.54	0.12	0.007
Akvan94-1004	44.49	36.23	-700	140	16.12	0.45	0.14	0.007
Akvan94-1005	44.32	36.23	-1250	150	16.15	0.46	0.26	0.009
Akvan94-1006	44.15	36.23	-1800	152	16.18	0.48		0.011
Akvan94-1007	43.82	36.23	-2000	143	16.15	0.46		0.008
Akvan94-1008	43.49	36.23	-2100	120	16.23	0.48	0.16	0.008
Akvan94-1016	44.66	37.23	-800	157	16.19	0.45	0.25	0.012
Akvan94-1018	44.52	37.23	-1230	158	16.20	0.48	0.19	0.010
Akvan94-1019	44.15	37.23	-2050	125	16.19	0.51	0.22	0.010
Akvan94-1020	43.82	37.23	-2090	120	16.12	0.52	0.22	0.011
Akvan94-1021	43.49	37.23	-2160	128	16.24	0.46	0.21	0.009
Akvan94-1022	43.15	37.23	-2100	125	16.24	0.46	0.20	0.008
Akvan94-1023	42.82	37.75	-2130	92	16.15	0.45	0.20	0.011
Akvan94-1024	43.15	37.75	-2100	112	16.18	0.47	0.16	0.009
Akvan94-1025	43.49	37.75	-2100	118	16.25	0.48	0.24	0.009
Akvan94-1026	43.82	37.75	-2100	118	16.21	0.47	0.23	0.009
Akvan94-1027	44.15	37.75	-1700	132	16.24	0.48	0.26	0.008
Akvan94-1028	44.32	37.75	-1500	143	16.25	0.48	0.29	0.008
Akvan94-1029	44.56	37.75	-750	160	16.22	0.51	0.25	0.009
Akvan94-1031	44.45	37.90	-600	157	16.22	0.51	0.25	0.010
Akvan94-1032	44.29	38.24	-520	154	16.20	0.52	0.26	0.009
Akvan94-1034	44.17	38.24	-550	152	16.27	0.50	0.24	0.007
Akvan94-1035	43.82	38.24	-2000	136	16.22	0.49	0.28	0.007
Akvan94-1036	43.49	38.24	-2060	125	16.26	0.51	0.19	0.009
Akvan94-1037	43.15	38.24	-2100	114	16.26	0.48	0.29	0.007
Akvan94-1038	42.82	38.24	-2100	111	16.19	0.52	0.23	0.009
Akvan94-1039	42.49	38.24	-2100	109	16.26	0.47	0.18	0.008
Akvan94-1040	42.49	38.77	-2100	123	16.24	0.54	0.13	0.007
Akvan94-1041	42.82	38.77	-2100	125	16.26	0.53	0.13	0.008
Akvan94-1042	43.15	38.77	-2110	122	16.24	0.41	0.12	0.008
Akvan94-1043	43.49	38.77	-2100	153	16.28	0.45	0.14	0.007
Akvan94-1044	43.82	38.77	-1500	162	16.26	0.50	0.13	0.007
Akvan94-1045	44.00	38.77	-1100	170	16.29	0.47	0.13	0.007
Akvan94-1046	44.15	38.77	-540	164	16.22	0.48	0.18	0.009
Akvan94-1054	42.15	39.76	-1850	137	16.21	0.46	0.14	0.010
Akvan94-1055	42.49	39.76	-1800	123	16.23	0.47	0.08	0.008
Akvan94-1056	42.82	39.76	-1800	128	16.23	0.45	0.12	0.008
Akvan94-1057	43.15	39.76	-1450	141	16.24	0.40	0.14	0.008
Akvan94-1058	43.32	39.76	-1000	152	16.22	0.46	0.11	0.008
Akvan94-1059	43.42	39.76	-550	146	16.20	0.57	0.16	0.009
Akvan94-1044_1	43.81	38.76	-1600	156	16.23	0.55		0.009
Akvan94-1044_7	43.81	38.76	-1600	140	16.06	0.53		0.011
Akvan94-1044_10	43.81	38.76	-1600	151	16.18	0.54		0.008