Citation:

PANGAEA.761662, Supplement to: Vedernikov, VI; Demidov, AB (1999): Primary production and chlorophyll in the North Atlantic in September-October 1991. Translated from Okeanologiya, 1999, 39(6), 876-886, Oceanology, 39(6), 796-805

Name: (Table 1) Productive characteristics of phytoplankton and some relevant factors in the North Atlantic in September-October 1991
Published: 1999
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

During the study period values of primary production in the water column (C_pc) and average chlorophyll a concentration in the photosynthetic layer along the transect across the North Atlantic Current (NAC) were 140-348 mg C/m**2/day and 0.15-0.47 µg/l, along the transect across the Gulf Stream these values were 201-407 mg C/m**2/day and 0.13-0.24 µg/l; at stations of the sub-latitudinal (21°-28°N) transect across the Atlantic Ocean they were 95-360 mg C/m**2/day and 0.09-0.20 µg/l; and in the region of the Canary upwelling values were 951-1740 mg C/m**2/day and 0.56-5.35 µg/l. Along the transects across NAC and across the Atlantic Ocean the variability of C_pc signifi¬cantly depended on level of incident solar radiation. Transition from sub-arctic high-productive coastal waters to oceanic subtropical waters was accompanied by a downwelling of the main mass of chlo¬rophyll from the upper layers of the photosynthetic zone to its lower layers; this resulted in slower decrease of primary production with depth and in more effective utilization of solar radiation by phytoplankton. The photosynthetic layer at both oceanic and coastal stations was limited by irradiance level about 0.1% of its subsurface PAR values (E_0). In the subtropical waters, a deep chlorophyll maximum was formed at depths 100-120 m at low irradiance (0.4-1.2% E_0) and at nutrient concentrations (NO3 + NO2, PO4, Si) exceeding their very low concentrations in the upper 100 m layer by factor ~1.5.

Project(s):

Archive of Ocean Data (ARCOD)

Coverage:

Median Latitude: 32.425000 * Median Longitude: -41.752917 * South-bound Latitude: 21.300000 * West-bound Longitude: -66.750000 * North-bound Latitude: 53.000000 * East-bound Longitude: -17.240000

Date/Time Start: 1991-09-07T00:00:00 * Date/Time End: 1991-10-20T00:00:00

Minimum DEPTH, water: 100 m * Maximum DEPTH, water: 100 m

Event(s):

Vy23-3578 * Latitude: 53.000000 * Longitude: -41.090000 * Date/Time: 1991-09-07T00:00:00 * Location: North Atlantic * Method/Device: Transparent bottle 150L (TRANS150)

Vy23-3579 * Latitude: 50.500000 * Longitude: -40.970000 * Date/Time: 1991-09-08T00:00:00 * Location: North Atlantic * Method/Device: Transparent bottle 150L (TRANS150)

Vy23-3580 * Latitude: 49.000000 * Longitude: -43.000000 * Date/Time: 1991-09-09T00:00:00 * Location: North Atlantic * Method/Device: Transparent bottle 150L (TRANS150)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	Latitude of event	Latitude
3	Longitude of event	Longitude
4	Date/Time of event	Date/Time
5	DEPTH, water	Depth water	m			Geocode
6	Depth, top/min	Depth top	m	Vedernikov, Vladimir I
7	Depth, bottom/max	Depth bot	m	Vedernikov, Vladimir I
8	Primary production of carbon	PP C	mg/m³/day	Vedernikov, Vladimir I	14C in-situ incubation	in the surface layer
9	Primary production, integrated	PP C	mg/m²/day	Vedernikov, Vladimir I	Calculated
10	Chlorophyll a	Chl a	µg/l	Vedernikov, Vladimir I	Spectrophotometry	in the surface layer
11	Chlorophyll a	Chl a	µg/l	Vedernikov, Vladimir I	Spectrophotometry	in the photosynthetic layer, aver.
12	Chlorophyll a	Chl a	µg/l	Vedernikov, Vladimir I	Spectrophotometry
13	Assimilation rate of carbon per chlorophyll a	Assim r C/Chl a	mg/mg/h	Vedernikov, Vladimir I	Calculated	max
14	Assimilation rate of carbon per chlorophyll a	Assim r C/Chl a	mg/mg/h	Vedernikov, Vladimir I	Calculated	in the photosynthetic layer, aver.
15	Photosynthesis layer, thickness	TPhl	m	Vedernikov, Vladimir I
16	Depth of Secchi Disk	z(SD)	m	Vedernikov, Vladimir I	Secchi disc
17	Radiation, photosynthetically active over a period of a sample exposure	E	kJ/m²	Vedernikov, Vladimir I	Photometry
18	Productivity index	Psi	g C/(g Chl a)/E	Vedernikov, Vladimir I	Calculated
19	Nitrogen, total dissolved	TDN	µmol/l	Vedernikov, Vladimir I	Gas chromatography	of NO3+NO2
20	Nitrogen, total dissolved	TDN	µmol/l	Vedernikov, Vladimir I	Gas chromatography	of NH4
21	Phosphorus	P	µmol/l	Vedernikov, Vladimir I		of PO4
22	Silicon	Si	µmol/l	Vedernikov, Vladimir I	Titration
23	Temperature, water	Temp	°C	Vedernikov, Vladimir I	CTD, Neil Brown

License:

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

Size:

432 data points

Data

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

1 Event	2 Latitude	3 Longitude	4 Date/Time	5 Depth water [m]	7 Depth bot [m]	8 PP C [mg/m³/day] (in the surface layer, 14C in-...)	9 PP C [mg/m²/day] (Calculated)	10 Chl a [µg/l] (in the surface layer, Spectro...)	11 Chl a [µg/l] (in the photosynthetic layer, ...)	12 Chl a [µg/l] (Spectrophotometry)	13 Assim r C/Chl a [mg/mg/h] (max, Calculated)	14 Assim r C/Chl a [mg/mg/h] (in the photosynthetic layer, ...)	15 TPhl [m]	16 z(SD) [m] (Secchi disc)	17 E [kJ/m²] (Photometry)	18 Psi [g C/(g Chl a)/E] (Calculated)	19 TDN [µmol/l] (of NO3+NO2, Gas chromatography)	20 TDN [µmol/l] (of NH4, Gas chromatography)	21 P [µmol/l] (of PO4)	22 Si [µmol/l] (Titration)	23 Temp [°C] (CTD, Neil Brown)
Vy23-3578	53.00	-41.09	1991-09-07	100	200	17.5	206	0.524	0.47	0.17	2.53	0.55	60	13	1600	0.56	0.47	1.40	0.21	2.09	11.7
Vy23-3579	50.50	-40.97	1991-09-08	100	200	7.4	184	0.170	0.28	0.13	3.35	0.60	85	21	2000	0.47	0.70	0.60	0.22	4.21	16.7
Vy23-3580	49.00	-43.00	1991-09-09	100	200	10.9	241	0.372	0.42	0.15	2.43	0.74	60	13	1900	0.61	0.38	0.89	0.27	4.81	10.6
Vy23-3584	40.00	-43.48	1991-09-13	100	200	3.3	141	0.071	0.15	0.11	3.69	0.62	120	33	1400	0.67	3.10	0.95	0.17	7.35	24.1
Vy23-3585	42.00	-43.23	1991-09-14	100	200	5.8	348	0.084	0.17	0.12	5.55	1.30	125	28	3300	0.59	0.20	0.71	0.08	3.43	23.7
Vy23-3586	44.00	-43.35	1991-09-15	100	200	7.8	254	0.156	0.25	0.15	3.98	0.82	100	20	2700	0.45	0.06	0.72	0.01	3.03	20.4
Vy23-3587	43.00	-55.22	1991-09-18	100	200	7.2	201	0.142	0.24	0.11	4.12	0.91	75	21	1400	0.93	0.00	0.92	0.03	1.55	17.3
Vy23-3588	41.80	-56.60	1991-09-19	100	200	8.5	316	0.119	0.22	0.12	5.78	1.16	100	28	3800	0.45	0.00	1.00	0.00	5.46	21.8
Vy23-3589	40.00	-57.83	1991-09-20	100	200	3.4	222	0.066	0.13	0.09	4.47	1.20	120	30	3400	0.51	0.06	0.90	0.24	1.71	25.5
Vy23-3591	38.00	-62.00	1991-09-22	100	200	4.8	407	0.122	0.16	0.12	4.31	1.59	130	32	2900	0.79	0.18	0.74	0.00	0.05	25.7
Vy23-3592	28.70	-66.75	1991-10-01	100	200	1.6	95	0.038	0.11	0.09	3.78	0.64	120	28	900	1.01	0.00	0.60	0.00	0.15	27.9
Vy23-3593	28.00	-63.88	1991-10-02	100	200	1.6	163	0.030	0.12	0.11	4.92	0.69	170	34	4000	0.25	0.00	0.74	0.00	0.18	28.1
Vy23-3594	26.80	-56.35	1991-10-04	100	200	1.4	154	0.028	0.09	0.08	5.00	0.86	170	40	4000	0.31	0.00	0.60	0.07	0.12	27.8
Vy23-3595	25.80	-49.52	1991-10-06	100	200	1.5	132	0.044	0.11	0.10	6.63	0.73	140	35	2700	0.38	0.00	0.74	0.00	0.06	27.9
Vy23-3597	25.10	-44.84	1991-10-08	100	200	1.7	167	0.045	0.09	0.08	7.82	1.14	140	33	4300	0.32	0.00	0.80	0.00	0.32	27.3
Vy23-3600	24.10	-38.55	1991-10-10	100	200	1.8	178	0.058	0.12	0.11	3.94	0.81	150	33	4800	0.24	0.00	0.97	0.48	0.39	27.0
Vy23-3601	23.50	-33.25	1991-10-12	100	200	2.2	203	0.047	0.10	0.09	5.65	1.14	150	39	5000	0.32	0.00	1.07	0.02	1.21	26.2
Vy23-3603	23.10	-31.26	1991-10-13	100	200	2.7	218	0.041	0.11	0.09	6.48	1.14	150	35	4300	0.38	0.00	0.40	0.04	1.77	25.7
Vy23-3604	22.40	-27.38	1991-10-15	100	200	4.3	239	0.048	0.12	0.09	7.78	1.38	130	32	4300	0.44	0.08	0.42	0.11	1.67	25.6
Vy23-3605	22.10	-24.94	1991-10-16	100	200	3.7	233	0.043	0.14	0.11	7.46	1.13	130	33	4400	0.36	0.26	0.44	0.03	3.53	25.1
Vy23-3606	21.80	-22.53	1991-10-17	100	200	5.4	300	0.080	0.14	0.09	7.68	1.57	120	32	5100	0.43	0.15	0.56	0.14	0.04	24.6
Vy23-3607	21.50	-20.40	1991-10-18	100	200	8.9	359	0.058	0.20	0.12	14.10	1.53	100	27	5100	0.42	0.00	0.56	0.42	2.38	24.1
Vy23-3608	21.30	-18.41	1991-10-19	100	200	51.2	951	0.533	0.56	0.20	8.78	2.96	50	14	4900	0.83	0.51	0.54	0.46	2.66	21.6
Vy23-3609	22.70	-17.24	1991-10-20	100	200	248.0	1740	5.982	5.35	5.35	3.60	0.81	35	7	4700	0.23	0.05	0.72	0.34	1.31	19.8