(Table 2) Production parameters of phytoplankton and some associated parameters in the area of the Titanic Polygon

Vedernikov, Vladimir I; Gagarin, Vladimir I

(Table 2) Production parameters of phytoplankton and some associated parameters in the area of the Titanic Polygon

2003

Vedernikov, Vladimir I | Gagarin, Vladimir I

Studies were carried out mostly in the area of RMS Titanic wreck site (41°44'N, 49°57'W) located above the continental slope and the south of the Grand Banks of Newfoundland. In a period from 18.06 to 24.09.2001 five surveys of production characteristics of surface phytoplankton were conducted over 5-9 days. Mean values of these characteristics obtained during the surveys were 9.2-11.7 mg C/m**3 per day for primary production (C_phs), 0.102-0.188 mg/m**3 for chlorophyll a (C_chls), and 4.44-7.42 mg C/mg chl. a per hour for assimilation number (AN). The main reason for low C_phs variability was a significant inverse relationship (R=-0.66) between AN and C_chls found over the research area. When cold shelf waters dominated in the area (27.07 to 19.08.2001), C_chls values for the slope region (0.125+/-0.031 µg/l) and for the outer shelf (0.130+/-0.040 µg/l) were similar. During strengthening of influence of warmer slope waters within area (from 29.08 to 13.09.2001), C_chls concentration within surface waters of the outer shelf was 0.152+/-0.039 µg/l and exceeded one for the slope region (0.094+/-0.004 µg/l) by factor 1.6. Against the background of low Cchls values, the High values of integral primary production in the water column (510-1010 mg C/m**2 per day) at low C_chls values measured within the area were determined both by high assimilation activity of phytoplankton and by the deep (30-40 m) maximum of primary production. Main reasons for formation of such a maximum were high chlorophyll concentration within the layer of the deep chlorophyll maximum (up to 0.5-2.5 µg/l) and in the relatively high solar irradiance within this layer varying from 1.4 to 8.6% of subsurface PAR.

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Palabras clave de AGROVOC

northwest atlantic primary production radiation temperature thickness water

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PANGAEA

Otras materias

Latitude of event; Photosynthesis layer; Amk46; Bottle; Integrated; Amk46-4282; Arcod; Ctd; Amk46-4258; Amk46-4244; Archive of ocean data; Elevation of event; Longitude of event; Primary production of carbon; Amk46-4190; Niskin 30-l; Photometry; Event label; Nis_30l; Depth of secchi disk; Neil brown; Date/time of event; Chlorophyll a; Assimilation rate of carbon per chlorophyll a; Productivity index; Akademik mstislav keldysh; Calculated; 14c in-situ incubation; Photosynthetically active over a period of a sample exposure; Secchi disc

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text/tab-separated-values, 48 data points

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CC-BY-3.0: Creative Commons Attribution 3.0 Unported, Access constraints: unrestricted, info:eu-repo/semantics/openAccess

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Supplement to: Vedernikov, Vladimir I; Gagarin, Vladimir I (2003): Primary production and chlorophyll in the frontal zone of the Gulf Stream and Labrador Current in July-September 2001. Translated from Okeanologiya, 2003, 43(2), 209-218, Oceanology, 43(2), 196-205

En AGRIS desde: 2024-11-28

Fecha de modificación: 2025-10-25

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(Table 2) Production parameters of phytoplankton and some associated parameters in the area of the Titanic Polygon

2003

Palabras clave de AGROVOC

Información bibliográfica