FOCAL 1

Name: FOCAL 1
Start: 1982-10-11
End: 1982-11-22
Location: Atlantic Ocean

Type	Oceanographic cruise
Set	This cruise is part of the set FOCAL
Ship	Capricorne
Ship owner	Ifremer
Dates	11/10/1982 - 22/11/1982
Chief scientist(s)	HISARD Philippe
	CENTRE IRD FRANCE-SUD Centre IRD de Montpellier 911 avenue Agropolis BP 64501 34394 MONTPELLIER CEDEX 5 +33(0)4 67.41.61.00 montpellier@ird.fr http://www.france-sud.ird.fr/
DOI	10.17600/82009511
Objective	To observe and understand the causes of seasonal and interannual variability in the mass and heat fluxes carried by the Atlantic equatorial currents.

Sea/Ocean

Atlantic Ocean

(ATLANTIQUE EQUATORIAL)

Ports

Port of departure : Dakar (Senegal)

Port of return : Abidjan (Côte d'Ivoire)

Scientific Authority

CENTRE IRD FRANCE-SUD

Centre IRD de Montpellier

911 avenue Agropolis

34394 MONTPELLIER CEDEX 5

+33(0)4 67.41.61.00

montpellier@ird.fr

http://www.france-sud.ird.fr/

Participating bodie(s)

ORSTOM CENTRE D'OCEANOGRAPHIE ET DE PECHE DE DAKAR-THIAROYE

Discipline(s)

METEOROLOGY
PHYSICAL OCEANOGRAPHY
BIOLOGICAL OCEANOGRAPHY

Code	Label	Quantity	PI
B02	Phytoplankton pigments (eg chloroph	77 stations	HISARD Philippe
H09	Water bottle stations	77 stations	HISARD Philippe
H10	CTD stations	97 stations	HISARD Philippe
H21	Oxygen	77 stations	HISARD Philippe
H22	Phosphate	77 stations	HISARD Philippe
H24	Nitrate	77 stations	HISARD Philippe
H25	Nitrite	77 stations	HISARD Philippe
H28	pH	77 stations	HISARD Philippe

Summary of measurements

-97 hydrological stations with STDO probe between 0 and 500 m.
-80 vertical current profiles using the "profiler" technique.
-Installation of 3 NATAL tide gauges, at St Paul's Rock, Fernando de Noronha Island (Brazil).
-Installation of a weather beacon on the St Paul rock.
-Classical weather and surface observations (underway).

Location map

Positionning system

Geodetic system : VALEUR INDEFINIE

Data managed by SISMER

Bibliography

Publications

Lefevre Nathalie, Caniaux Guy, Janicot Serge, Gueye Abdou Karim (2013). Increased CO2 outgassing in February-May 2010 in the tropical Atlantic following the 2009 Pacific El Nino. Journal Of Geophysical Research-oceans, 118(4), 1645-1657. https://doi.org/10.1002/jgrc.20107

Gouriou Yves, Reverdin Gilles (1992). Isopycnal and diapycnal circulation of the upper equatorial Atlantic Ocean in 1983–1984. Journal Of Geophysical Research-Oceans, 97(C3), 3543-3572. https://doi.org/10.1029/91JC02935

Du Penhoat Yves, Gouriou Yves (1987). Hindcasts of equatorial sea surface dynamic height in the Atlantic in 1982–1984. Journal Of Geophysical Research-oceans, 92(C4), 3729-3740. https://doi.org/10.1029/JC092iC04p03729

References of Articles published in other Periodicals or Scientific Works acclaimed in the Field

Aman A., Testut L., Woodworth P., Aarup T., Dixon D. (2007). Seasonal sea level variability in the Gulf of Guinea from altimetry and tide gauge. Revue Ivoirienne des Sciences et Technologie, (09), 105-118.

Oudot C, Morin P (1987). The distribution of nutrients in the Equatorial Atlantic: Relation to physical processes and phytoplankton biomass. Oceanologica Acta, Special issue Open Access version : https://archimer.ifremer.fr/doc/00267/37856/

Colin C, Gonella J, Merle J (1987). Equatorial upwelling at 4 degree W during the FOCAL program. Oceanologica Acta, Special issue Open Access version : https://archimer.ifremer.fr/doc/00267/37845/