PIRATA-FR21

Name: PIRATA-FR21
Start: 2011-05-01
End: 2011-06-16
Location: Atlantic Ocean

Type	Oceanographic cruise
Set	This cruise is part of the set PIRATA
Ship	Le Suroît
Ship owner	Ifremer
Dates	01/05/2011 - 16/06/2011
Chief scientist(s)	BOURLES Bernard , GRELET Jacques
	IRD CENTRE DE BRETAGNE IFREMER Centre de Bretagne ZI Pointe du diable CS10070 29280 PLOUZANE +33 (0)2 98.22.45.01 http://www.brest.ird.fr/
DOI	10.17600/11020030
Objective	This is part of the general international PIRATA programme. As the 21st French cruise of this type, it is called FR21. The previous PIRATA-FR20 cruise was conducted in September/October 2010, making it possible to replace 5 Pirata buoys located in the Gulf of Guinea and at 23°W-0°N, as well as the current meter mooring at 0°-10°W. The objectives of the cruise were to replace 5 Pirata buoys located in the Gulf of Guinea and at 23°W-0°N, deploy 3 gliders (collaborative work by INSU and IFM-GEOMAR), deploy 5 drifting SVPBS buoys and 6 Arvor profiling floats (CORIOLIS), and recover 4 current meter moorings for the RSMAS (TACE/CLIVAR framework). The cruise had three legs: -LEG 1: Route Cotonou - 1°30N/10°W - 10°S/10°W - 0°N/0°N - Cotonou, LEG 2: Cotonou - 2°S/0°E - Cotonou, LEG 3: Cotonou - 0°N/0°E - 0°/23°W - Dakar. The related projects are SO-OA PIRATA (SOERE CTDO2), TACE/CLIVAR and AMMA2.

Sea/Ocean

Atlantic Ocean

Gulf of Guinea

(Golfe de Guinée et Atlantique équatorial)

Ports

Port of departure : Cotonou (Benin)

Port of return : Dakar (Senegal)

Project

PIRATA 2

Scientific Authority

IRD ANTENNE DE TOULOUSE

LEGOS/OMP

Observatoire Midi-Pyrenees

31400 TOULOUSE

Participating bodie(s)

IRD, CNRS/INSU, SHOM, CIPMA/Université Abomey-Calavi (Bénin), NOAA/PMEL-Sea

Discipline(s)

METEOROLOGY
CHEMICAL OCEANOGRAPHY
PHYSICAL OCEANOGRAPHY

Code	Label	Quantity	PI
B02	Phytoplankton pigments (eg chloroph Pour analyse chlorophylle ; filtration puis analyses au laboratoire	53 stations	BOURLES Bernard
B02	Phytoplankton pigments (eg chloroph Sur les bouteilles	53 stations	BAURAND François
D05	Surface drifters/drifting buoys Bouées dérivantes de surface SVP-BS	5 deployments	REVERDIN Gilles
D06	Neutrally buoyant floats Profileurs ARVOR	6	BOURLES Bernard
D71	Current profiler (eg ADCP) LADCP 2x300Khz + (resp : Chuchla) Mesures avec SADCP 150kHz	-	GRELET Jacques
D90	Other physical oceanographic meas. (resp : Brandt/Bourlès). Planeurs hydro gliders Slocum (T, S, O2)	3 deployments	TESTOR Pierre
G73	Single-beam echosounding	-	BOURLES Bernard
G75	Single channel seismic reflection	-	BOURLES Bernard
H09	Water bottle stations Rosettes avec 11 bouteilles de prélèvement	53 stations	BOURLES Bernard
H10	CTD stations Sonde Seabird SBE911+ avec capteurs T, CO2	59 stations	GRELET Jacques
H13	Bathythermograph XBT	-	BOURLES Bernard
H21	Oxygen (resp : Hillion/Baurand). Analyse des prélèvement bouteilles	59 stations	CHUCHLA Rémy
H22	Phosphate (resp : Hillion). Pasteurisation des prélèv. pour analyses en labo.	53 stations	BAURAND François
H24	Nitrate (resp : Hillion). Pasteurisation des prélèv. pour analyses en labo.	53 stations	BAURAND François
H25	Nitrite (resp : Hillion). Pasteurisation des prélèv. pour analyses en labo.	53 stations	BAURAND François
H26	Silicate (resp : Hillion). Pasteurisation des prélèv. pour analyses en labo.	53 stations	BAURAND François
H71	Surface measurements underway (T,S) Mesures avec logiciel Seabird / Seasave	-	GRELET Jacques
H74	Carbon dioxide Echantillons en surface et profondeur au mouillage à 6°S-10°W.	-	LEFEVRE Nathalie
M02	Incident radiation SW aux bouées Atlas, mesures continues	5 measurements	BOURLES Bernard
M06	Routine standard measurements Météo, vent	-	BOURLES Bernard
M90	Other meteorological measurements Vent, humidité, T°, précip. aux bouées Atlas, mesures continues	5 measurements	BOURLES Bernard

Summary of measurements

- Mooring operations 5 ATLAS buoys from the PIRATA programme were replaced. A pCO2 sensor was replaced on a buoy. Salinity sensors and current meters were added on a few buoys. 4 current meter moorings(RSMAS, Miami) were retrieved.
-Hydrology and currentometry at 0°N-0°E, 0°N-23°W, every 1/2 degree of latitude along 10°W and at sites were ARVOR profiling floats were deployed. SBE911+ CTD cast and LADCP. Bottles to measure S, O2, nutrients, CO2, Chl.
-Thermal and thermohaline profiles: XBT shots, with high spatial resolution in the Gulf Guinea (1/2 along 10°W at 1 degree during main transits) in the Equatorial belt.
-Operations to deploy gliders. 1 glider (fitted with ocean turbulence sensors and belonging to IFM-GEOMAR) at 0°N-10°W, and 2 gliders (one belonging to IFM-GEOMAR and the other to INSU) at 0°N-0°E.
-Operations to deploy profiling floats and drifting buoys: ARVOR float, drifting surface buoys including 2 fitted with skin temperature sensors(Surplas, PI: Gilles Reverdin).
-Continuous measurements of current in upper layers, surface temperature and surface salinity. Navigational and meteorological variables were also recorded (GPS, shipboard weather station).

Location map

Positionning system

Geodetic system : WORLD GEODETIC SYSTEM 1984 = WGS84

Positioning system : GPS différentiel

Joint document(s)

Published data

Bourlès Bernard, Herbert Gaëlle, Rousselot Pierre, Grelet Jacques, Pondaven Ildut, Llido Jerome (2024). French PIRATA cruises: S-ADCP data. https://doi.org/10.17882/44635

Bourlès Bernard, Rousselot Pierre, Grelet Jacques, Roubaud Fabrice, Bachelier Celine, Chuchla Remy, Gouriou Yves, Pondaven Ildut, Llido Jerome (2024). French PIRATA cruises: CTD-O2 data. https://doi.org/10.17882/51534

Data managed by SISMER

Bibliography

Publications

Perez Renellys C, Hormann Verena, Lumpkin Rick, Brandt Peter, Johns William E., Hernandez Fabrice, Schmid Claudia, Bourles Bernard (2014). Mean meridional currents in the central and eastern equatorial Atlantic. Climate Dynamics, 43(11), 2943-2962. https://doi.org/10.1007/s00382-013-1968-5

Johns W. E., Brandt P., Bourles B., Tantet A., Papapostolou A., Houk A. (2014). Zonal structure and seasonal variability of the Atlantic Equatorial Undercurrent. Climate Dynamics, 43(11), 3047-3069. https://doi.org/10.1007/s00382-014-2136-2

Kolodziejczyk Nicolas, Marin Frederic, Bourles Bernard, Gouriou Yves, Berger Henrick (2014). Seasonal variability of the equatorial undercurrent termination and associated salinity maximum in the Gulf of Guinea. Climate Dynamics, 43(11), 3025-3046. https://doi.org/10.1007/s00382-014-2107-7

Da-Allada Casimir Yelognisse, Alory G., Du Penhoat Y., Jouanno J., Hounkonnou M. N., Kestenare E. (2014). Causes for the recent increase in sea surface salinity in the north-eastern Gulf of Guinea. African Journal Of Marine Science, 36(2), 197-205. https://doi.org/10.2989/1814232X.2014.927398

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

Lellouche J. -M., Le Galloudec O., Drevillon M., Regnier C., Greiner E., Garric G., Ferry N., Desportes C., Testut C. -E., Bricaud C., Bourdalle-Badie R., Tranchant B., Benkiran M., Drillet Y., Daudin A., de Nicola C. (2013). Evaluation of global monitoring and forecasting systems at Mercator Ocean. Ocean Science, 9(1), 57-81. Publisher's official version : https://doi.org/10.5194/os-9-57-2013 , Open Access version : https://archimer.ifremer.fr/doc/00141/25229/

Cabanes Cecile, Grouazel Antoine , von Schuckmann Karina, Hamon Michel, Turpin Victor, Coatanoan Christine , Paris Francois, Guinehut Stephanie, Boone C., Ferry N., de Boyer Montegut Clement , Carval Thierry , Reverdin Gilles, Pouliquen Sylvie, Le Traon Pierre-Yves (2013). The CORA dataset: validation and diagnostics of in-situ ocean temperature and salinity measurements. Ocean Science, 9(1), 1-18. Publisher's official version : https://doi.org/10.5194/os-9-1-2013 , Open Access version : https://archimer.ifremer.fr/doc/00117/22799/

Scott Robert, Ferry Nicolas, Drevillon Marie, Barron Charlie N., Jourdain Nicolas C., Lellouche Jean-Michel, Metzger Edward Joseph, Rio Marie-Helene, Smedstad Ole Martin (2012). Estimates of surface drifter trajectories in the equatorial Atlantic: a multi-model ensemble approach. Ocean Dynamics, 62(7), 1091-1109. https://doi.org/10.1007/s10236-012-0548-2

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

Herbert Gaelle, Kermabon Catherine, Grelet Jacques, Bourles Bernard (2015). French PIRATA cruises S-ADCP data processing. Mercator Ocean - Quaterly Newsletter, (52), 22-26. Open Access version : https://archimer.ifremer.fr/doc/00272/38320/

File	Processing level	Size	Format
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Open access 11020030_215087-4_BB150_osite.nc	RAW DATA	14 MB	NETCDF OceanSite
Open access 11020030_215087-5_BB150_osite.nc	RAW DATA	36 MB	NETCDF OceanSite
Open access 11020030_215088-3_BB150_fhv1.nc	DATA CHECKED BY THE SUPPLIER	42 MB	NETCDF OceanSite
Open access 11020030_215088-4_BB150_fhv1.nc	DATA CHECKED BY THE SUPPLIER	14 MB	NETCDF OceanSite
Open access 11020030_215088-5_BB150_fhv1.nc	DATA CHECKED BY THE SUPPLIER	36 MB	NETCDF OceanSite
Open access 11020030_215088-6_BB150_figures.tar	DATA CHECKED BY THE SUPPLIER	718 KB	TAR
Open access 11020030_215088-7_BB150_figures.tar	DATA CHECKED BY THE SUPPLIER	766 KB	TAR
Open access 11020030_215088-8_BB150_figures.tar	DATA CHECKED BY THE SUPPLIER	1 MB	TAR
Open access 11020030_215088-9_BB150_Readme.txt	DATA CHECKED BY THE SUPPLIER	2 KB	ASCII
Open access 11020030_215088-10_BB150_Readme.txt	DATA CHECKED BY THE SUPPLIER	2 KB	ASCII
Open access 11020030_215088-11_BB150_Readme.txt	DATA CHECKED BY THE SUPPLIER	2 KB	ASCII