EDMED Details

General

Dataset Name: Spectral 'in vivo' fluorescence studies in E Tropical Atlantic (Oct. 1991)
Data Holding Centre: Universita' di Firenze - Laboratorio di Ecologia, Dipartimento di Biologia Vegetale
Time Period: from 1 to 24 October 1991
Start Date: 1991-01-01
End Date: 1991-12-31
Project

Geocoverage: Tropical Atlantic Ocean in two main sites: M (18deg 29'N, 21deg W) and O (21deg N, 31deg W) and surface monitoring between the Canary Islands and station M
Geographic Box (south,north,west,east): 18, -31, -21, 22
Sea Area: North Atlantic Ocean

Parameters: Variable fluorescence parameters; Phytoplankton taxonomic abundance in water bodies; Acoustic backscatter in the water column; Phytoplankton generic abundance in water bodies
Instruments: fluorometers; optical microscopes

Summary: EUMELI (P.F.O.), JGOFS-France - The general aim of the EUMELI program was to study the flux of material in the tropical oceanic water column. Two different trophic situations in the tropical Atlantic Ocean have been studied during the EUMELI 3 cruise (R/V 'Atlante'): oligotrophic (Station O2, 21deg N, 31deg W) and mesotrophic (Station M2, 18deg N, 21deg W). All standard oceanographic measurements have been carried out following JGOFS protocol for 'core parameters' (contact LPCM - Villefranche sur Mer). Moreover, in vivo fluorescence of photosynthetic pigments has been measured at the two sites for the water column over several days. In addition, at station O, pigments were measured at one hour intervals for a period of 34 hours to acquire information about the spectral variability of phytoplankton fluorescence and physiological response of natural populations. The following measurements are available: - time-integrated in vivo fluorescence, before and after DCMU; - quantum corrected excitation spectra of chlorophyll-a and phycoerythrin fluorescence; - emission spectra of chlorophyll-a and phycoerythrin fluorescence; - vertical profiles of downwelling, upwelling and scalar underwater irradiance (up to 120m or 1/1000 of the surface PAR); - Utermohl phytoplankton density and species composition.
Originator: Universita' di Firenze - Laboratorio di Ecologia, Dipartimento di Biologia Vegetale
References

Availability: by negotiation
Organization: Universita' di Firenze - Laboratorio di Ecologia, Dipartimento di Biologia Vegetale
Contact: Mori G.
Address: Universita' di Firenze - Laboratorio di Ecologia, Dipartimento di Biologia Vegetale; Firenze; 50121; Italy; sdn-userdesk@seadatanet.org; http://www.unifi.it/unifi/bioveg/