Citation:

PANGAEA.684631

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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: 39.224200 * Longitude: 25.000000

Date/Time Start: 1997-04-02T00:00:00 * Date/Time End: 1997-04-02T00:00:00

Minimum DEPTH, water: 0 m * Maximum DEPTH, water: 785 m

Event(s):

MARCH-1997-GN36199704603MNB03 * Latitude: 39.224200 * Longitude: 25.000000 * Date/Time: 1997-04-02T00:00:00 * Method/Device: (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:

124 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]
0	258.019	-1.914	100.747	0.009	0.629	0.493	1.146
5	267.394	-11.331	104.425	0.032	0.678	0.047	1.467
10	257.573	-1.645	100.643	0.026	0.527	0.047	0.390
20	254.002	0.233	99.908	0.009	0.702	0.052	0.741
30	259.805	-6.042	102.381	0.038	0.608	0.027	0.184
40	257.573	-4.045	101.595	0.009	0.599	0.072	0.136
50	256.680	-3.272	101.291	0.009	0.689	0.092	0.106
75	254.448	-1.468	100.580	0.009	0.891	0.072	0.544
100	250.430	1.477	99.414	0.004	0.875	0.102	0.689
120	250.877	0.844	99.665	0.038	0.678	0.047	0.606
150	249.538	1.795	99.286	0.060	0.594	0.162	0.927
200	248.198	3.456	98.627	0.066	0.807	0.077	0.924
300	250.430	1.702	99.325	0.032	0.545	0.047	1.513
400	233.021	23.195	90.947	0.089	2.527	0.137
500	233.021	23.605	90.802	0.089	2.570	0.027	2.552
600	229.896	27.043	89.475	0.117	3.545		2.960
700	226.325	30.870	87.997	0.140	4.334	0.117	2.963
785	228.110	29.154	88.668	0.117	5.095	0.017	3.254