Citation:

PANGAEA.684627

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Related to:

Souvermezoglou, Ekaterini; Krasakopoulou, Evangelia (2000): Chemical oceanography in the Cretan Sea: Changes associated to the transient. Mediterranean Marine Science, 1/2, 91-103, https://doi.org/10.12681/mms.292

Souvermezoglou, Ekaterini; Krasakopoulou, Evangelia (2002): High oxygen consumption rates in the deep layers of the north Aegean Sea. Mediterranean Marine Science, 3/1, 55-65, https://doi.org/10.12681/mms.258

Project(s):

Mass Transfer and Ecosystem Response (MATER)

Funding:

Fourth Framework Programme (FP4), grant/award no. IC21960002 : Mass Transfer and Ecosystem Response

Fourth Framework Programme (FP4), grant/award no. MAS3960051 : Mass Transfer and Ecosystem Response

Coverage:

Latitude: 36.000000 * Longitude: 25.705000

Date/Time Start: 1997-03-09T00:00:00 * Date/Time End: 1997-03-09T00:00:00

Minimum DEPTH, water: 2 m * Maximum DEPTH, water: 1280 m

Event(s):

MARCH-1997-GN36199704601MSB06 * Latitude: 36.000000 * Longitude: 25.705000 * Date/Time: 1997-03-09T00:00:00 * Method/Device: Bottle, Niskin 8-L (NIS_8L)

Comment:

For oxygen determination samples were analysed on board immediately after collection with the Winkler method according to Carpenter (1965a, 1965b). Titration was done with a Metrohm Dosimat 665 automatic burette. Precision of the method is estimated at 0.05 ml O2/l.

Apparent oxygen utilisation (AOU) was calculated according to difference of measured oxygen values and oxygen saturation given by the equations of Benson and Krause (1984), which are recommended by Millero (1986).

Percentage of oxygen saturation in water was calculated from the following equation (at temperature 0-40ºC and salinity 0-40 promille): %O2 = (O2/O2') X100, where O2 is oxygen concentration in a sample, O2' is oxygen solubility in sea water at the same temperature and salinity as in the sample.

Samples for determination of nutrients were collected in 100 ml polyethylene bottles and kept continuously under deep freeze (-20°C ) until analysis in the laboratory.

Nitrate and nitrite were analysed by a Bran and Luebbe Autoanalyser II according to the procedure of Treguer and Le Corre (1975).

Phosphate was measured by a Perkin Elmer Lambda 2S UV/VIS Spectrometer according to the method described by Murphy and Riley (1962).

Precision is estimated at ±0.1 µmol/l for nitrate and ±0.02 µmol/l for phosphate and nitrite.

Detection limit was 0.08 µmol/l for nitrate and nitrite and 0.01 µmol/l for phosphate.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, water	Depth water	m			Geocode
2	Oxygen	O2	µmol/l	Souvermezoglou, Ekaterini	Dissolved oxygen with modified Winkler (Carpenter, 1965)
3	Oxygen, apparent utilization	AOU	µmol/l	Souvermezoglou, Ekaterini	Calculated, in situ oxygen concentration and in situ oxygen saturation
4	Oxygen saturation	O2 sat	%	Souvermezoglou, Ekaterini	Calculated, in situ oxygen concentration and in situ oxygen saturation
5	Phosphate	[PO4]3-	µmol/l	Souvermezoglou, Ekaterini	Determination of phosphate (Murphy & Riley, 1962)
6	Silicate	Si(OH)4	µmol/l	Souvermezoglou, Ekaterini	Dissolved silica, colorimetric (Mullin & Riley, 1955)
7	Nitrite	[NO2]-	µmol/l	Souvermezoglou, Ekaterini	Determination of nitrite (Bendschneider & Robinson, 1952, J Mar Res, 11:87-96)
8	Nitrate	[NO3]-	µmol/l	Souvermezoglou, Ekaterini	Seawater analysis (Strickland & Parsons, 1968)

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

139 data points

Data

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

1 Depth water [m]	2 O2 [µmol/l]	3 AOU [µmol/l]	4 O2 sat [%]	5 [PO4]3- [µmol/l]	6 Si(OH)4 [µmol/l]	7 [NO2]- [µmol/l]	8 [NO3]- [µmol/l]
2	239.270	8.951	96.394	0.012	1.882	0.424	1.915
5	239.003	9.212	96.289	0.044	0.937	0.123	0.884
10	238.735	9.479	96.181	0.050	1.261	0.186	0.840
20	238.869	9.331	96.241	0.033	0.000	0.092	1.038
30	244.627	3.589	98.554	0.017	0.000	0.098	0.870
40	229.985	18.123	92.696	0.023	1.061	0.167	0.948
50	227.976	20.063	91.912	0.039	1.625	0.054
75	232.307	16.093	93.521	0.012	1.180	0.129	1.038
100	232.530	15.987	93.567	0.028	1.226	0.136	1.050
120	232.307	16.230	93.470	0.028	1.301	0.098	1.060
150	231.146	17.397	93.000	0.017	1.310	0.845	1.105
200	208.067	42.196	83.139	0.093	3.113	0.387	3.095
300	210.969	40.044	84.047	0.114	3.227	0.255	2.849
400	217.575	33.383	86.698	0.168	2.784	0.418	2.730
500	217.754	34.009	86.492	0.082	2.954	0.299	2.463
600	222.486	29.262	88.377	0.076	2.325	0.267	2.355
700	222.664	29.272	88.381	0.082	2.260	0.449	2.112
1000	225.521	26.475	89.494	0.082	5.800	0.362	3.721
1200	226.280	26.068	89.670	0.093	4.485	0.556	3.392
1280	224.361	28.040	88.891	0.093	4.790	0.393	2.579