EGEE/3

Type Oceanographic cruise
Set This cruise is part of the set EGEE
Ship L'Atalante
Ship owner Ifremer
Dates 24/05/2006 - 06/07/2006
Chief scientist(s) BOURLES Bernard , GOURIOU Yves

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 10.17600/6010070
Objective The EGEE project (Gulf of Guinea climate and ocean circulation study, which is the oceanographic strand of the AMMA -African Monsoon Multidisciplinary Analyses program) general objective is to study variability in the upper layers of the Gulf of Guinea (GG). It emphasizes ocean-atmosphere interface exchanges, through joint use of in situ and satellite measurements and numerical model results, as well as sub-surface ocean circulation which greatly conditions the way surface layers evolve. Indeed, ocean circulation and its variability in the eastern region of the Tropical Atlantic Ocean and their relations with the climate of the surrounding regions are paradoxically still poorly known. It has already been established that the monsoon's intensity and the intensity and distribution of rainfall over Western Africa depend on meridian energy gradients between the Atlantic (more specifically the GG) and continental regions (Western Africa). These limiting layer gradients are conditioned by surface variable, whether continental (albedo, vegetation, soil hydric status) or oceanic (sea surface temperature). One of the scientific issues taking priority lies in understanding the mechanisms governing changes in sea surface temperature (SST), salinity and the mixing layer, as well as their variability on seasonal to inter-annual scales. Understanding and simulating energy exchanges at the interface, like those of convection or soil patterns for atmospheric models, rely greatly on the parameterization which is particularly complex and vital for climate studies. The related project is EGEE (oceanographic strand), AMMA and PIRATA.

Published data

Bourles Bernard, Baurand Francois, Hillion Sandrine, Rousselot Pierre, Grelet Jacques, Bachelier Celine, Roubaud Fabrice, Gouriou Yves, Chuchla Remy, Cariou Thierry, Llido Jerome (2023). French PIRATA cruises: CHEMICAL ANALYSIS data. https://doi.org/10.17882/58141


Bourlès Bernard, Herbert Gaëlle, Rousselot Pierre, Grelet Jacques, Llido Jerome (2023). French PIRATA cruises: S-ADCP data. https://doi.org/10.17882/44635


Data managed by SISMER

Bibliography

Publications

Krishna Kande Vamsi, Shanmugam Palanisamy (2023). Robust estimates of the Total Alkalinity from Satellite Oceanographic data in the Global Ocean. Ieee Access, 11, 42824-42838. Publisher's official version : https://doi.org/10.1109/ACCESS.2023.3271516 , Open Access version : https://archimer.ifremer.fr/doc/00835/94687/


Napolitano D. C., Alory G., Dadou I., Morel Y., Jouanno J., Morvan G. (2022). Influence of the Gulf of Guinea islands on the Atlantic Equatorial Undercurrent circulation. Journal Of Geophysical Research-oceans, 127(9), e2021JC017999 (26p.). Publisher's official version : https://doi.org/10.1029/2021JC017999 , Open Access version : https://archimer.ifremer.fr/doc/00793/90511/


Lefèvre Nathalie, Mejia Carlos, Khvorostyanov Dmitry, Beaumont Laurence, Koffi Urbain (2021). Ocean Circulation Drives the Variability of the Carbon System in the Eastern Tropical Atlantic. Oceans-switzerland, 2(1), 126-148. Publisher's official version : https://doi.org/10.3390/oceans2010008 , Open Access version : https://archimer.ifremer.fr/doc/00678/79046/


Bourlès Bernard, Araujo Moacyr, McPhaden Michael J., Brandt Peter, Foltz Gregory R., Lumpkin Rick, Giordani Hervé, Hernandez Fabrice, Lefèvre Nathalie, Nobre Paulo, Campos Edmo, Saravanan Ramalingam, Trotte‐duhà Janice, Dengler Marcus, Hahn Johannes, Hummels Rebecca, Lübbecke Joke F., Rouault Mathieu, Cotrim Leticia, Sutton Adrienne, Jochum Markus, Perez Renellys C (2019). PIRATA: A Sustained Observing System for Tropical Atlantic Climate Research and Forecasting. Earth And Space Science, 6(4), 577-616. Publisher's official version : https://doi.org/10.1029/2018EA000428 , Open Access version : https://archimer.ifremer.fr/doc/00485/59680/


Meynadier Remi, de Coetlogon Gaelle, Leduc-Leballeur Marion, Eymard Laurence, Janicot Serge (2016). Seasonal influence of the sea surface temperature on the low atmospheric circulation and precipitation in the eastern equatorial Atlantic. Climate Dynamics, 47(3-4), 1127-1142. https://doi.org/10.1007/s00382-015-2892-7


Nubi O A, Bourles Bernard, Edokpayi C A, Hounkonnou M N (2016). On the Nutrient distribution and phytoplankton biomass in the Gulf of Guinea equatorial band as inferred from In-situ measurements. Journal of Oceanography and Marine Science, 7(1), 1-11. Publisher's official version : https://doi.org/10.5897/JOMS2016.0124 , Open Access version : https://archimer.ifremer.fr/doc/00621/73324/


Meynadier Remi, de Coetlogon G., Bastin S., Eymard L., Janicot S. (2015). Sensitivity testing of WRF parameterizations on air-sea interaction and its impact on water cycle in the Gulf of Guinea. Quarterly Journal Of The Royal Meteorological Society, 141(690 Part.A), 1804-1820. https://doi.org/10.1002/qj.2483


Parard Gaelle, Boutin J., Cuypers Y., Bouruet-Aubertot P., Caniaux G. (2014). On the physical and biogeochemical processes driving the high frequency variability of CO2 fugacity at 6 degrees S, 10 degrees W: Potential role of the internal waves. Journal Of Geophysical Research-oceans, 119(12), 8357-8374. Publisher's official version : https://doi.org/10.1002/2014JC009965 , Open Access version : https://archimer.ifremer.fr/doc/00624/73568/


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


Da-Allada Casimir Yelognisse, Du Penhoat Yves, Jouanno Julien, Alory Gael, Hounkonnou Norbert Mahouton (2014). Modeled mixed-layer salinity balance in the Gulf of Guinea: seasonal and interannual variability. Ocean Dynamics, 64(12), 1783-1802. Publisher's official version : https://doi.org/10.1007/s10236-014-0775-9 , Open Access version : https://archimer.ifremer.fr/doc/00242/35333/


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


Roehrig Romain, Bouniol Dominique, Guichard Francoise, Hourdin Frederic, Redelsperger Jean-Luc (2013). The Present and Future of the West African Monsoon: A Process-Oriented Assessment of CMIP5 Simulations along the AMMA Transect. Journal Of Climate, 26(17), 6471-6505. https://doi.org/10.1175/JCLI-D-12-00505.1


Hummels Rebecca, Dengler Marcus, Bourles Bernard (2013). Seasonal and regional variability of upper ocean diapycnal heat flux in the Atlantic cold tongue. Progress In Oceanography, 111, 52-74. https://doi.org/10.1016/j.pocean.2012.11.001


Giordani Hervé, Caniaux Guy, Voldoire Aurore (2013). Intraseasonal mixed-layer heat budget in the equatorial Atlantic during the cold tongue development in 2006. Journal Of Geophysical Research-oceans, 118(2), 650-671. https://doi.org/10.1029/2012JC008280


Jouanno Julien, Marin Frederic, Du Penhoat Yves, Molines Jean-Marc (2013). Intraseasonal Modulation of the Surface Cooling in the Gulf of Guinea. Journal Of Physical Oceanography, 43(2), 382-401. https://doi.org/10.1175/JPO-D-12-053.1


Da-Allada C. Y., Alory G., Du Penhoat Y., Kestenare E., Durand F., Hounkonnou N. M. (2013). Seasonal mixed-layer salinity balance in the tropical Atlantic Ocean: mean state and seasonal cycle. Journal Of Geophysical Research-oceans, 118(1), 332-345. https://doi.org/10.1029/2012JC008357


Cabanes CecileORCID, Grouazel AntoineORCID, von Schuckmann Karina, Hamon Michel, Turpin Victor, Coatanoan ChristineORCID, Paris Francois, Guinehut Stephanie, Boone C., Ferry N., de Boyer Montegut ClementORCID, Carval ThierryORCID, Reverdin Gilles, Pouliquen SylvieORCID, Le Traon Pierre-YvesORCID (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/


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/


Lefevre Nathalie, Merlivat Liliane (2012). Carbon and oxygen net community production in the eastern tropical Atlantic estimated from a moored buoy. Global biogeochemical cycles, 26(1), 1-14. https://doi.org/10.1029/2010GB004018


Giordani Herve, Caniaux Guy (2011). Diagnosing vertical motion in the Equatorial Atlantic. Ocean Dynamics, 61(12), 1995-2018. https://doi.org/10.1007/s10236-011-0467-7


Jouanno Julien, Marin Frederic, Du Penhoat Yves, Sheinbaum Julio, Molines Jean-Marc (2011). Seasonal heat balance in the upper 100 m of the equatorial Atlantic Ocean. Journal Of Geophysical Research-oceans, 116(C09003 1), 1-19. https://doi.org/10.1029/2010JC006912


Wade Malick, Caniaux Guy, Du Penhoat Yves (2011). Variability of the mixed layer heat budget in the eastern equatorial Atlantic during 2005-2007 as inferred using Argo floats. Journal Of Geophysical Research-oceans, 116(C08006 1), 1-17. https://doi.org/10.1029/2010JC006683


Jouanno Julien, Marin Frederic, Du Penhoat Yves, Molines Jean Marc, Sheinbaum Julio (2011). Seasonal Modes of Surface Cooling in the Gulf of Guinea. Journal Of Physical Oceanography, 41(7), 1408-1416. https://doi.org/10.1175/JPO-D-11-031.1


Caniaux Guy, Giordani Herve, Redelsperger Jean-Luc, Guichard Francoise, Key Erica, Wade Malick (2011). Coupling between the Atlantic cold tongue and the West African monsoon in boreal spring and summer. Journal Of Geophysical Research-oceans, 116(C04003), 1-17. https://doi.org/10.1029/2010JC006570


Leduc-Leballeur Marion, Eymard L., de Coetlogon Gaelle (2011). Observation of the marine atmospheric boundary layer in the Gulf of Guinea during the 2006 boreal spring. Quarterly Journal Of The Royal Meteorological Society, 137(657), 992-1003. https://doi.org/10.1002/qj.808


Ali K.E., Kouadio K.Y., Zahiri E.-P., Aman A., Assamoi A.P., Bourles Bernard (2011). Influence of the Gulf of Guinea Coastal and Equatorial Upwellings on the Precipitations along its Northern Coasts during the Boreal Summer Period. Asian Journal of Applied Sciences, 4(3), 271-285. https://doi.org/10.3923/ajaps.2011.271.285


Wade Malick, Caniaux Guy, Dupenhoat Yves, Dengler Marcus, Giordani Herve, Hummels Rebecca (2011). A one-dimensional modeling study of the diurnal cycle in the equatorial Atlantic at the PIRATA buoys during the EGEE-3 campaign. Ocean Dynamics, 61(1), 1-20. https://doi.org/10.1007/s10236-010-0337-8


Brandt Peter, Caniaux Guy, Bourles Bernard, Lazar Alban, Dengler Marcus, Funk Andreas, Hormann Verena, Giordani Herve, Marin Frederic (2011). Equatorial upper-ocean dynamics and their interaction with the West African monsoon. Atmospheric Science Letters, 12(1), 24-30. https://doi.org/10.1002/asl.287


Janicot S., Caniaux G., Chauvin Frederic, de Coetlogon G., Fontaine B., Hall N., Kiladis G., Lafore J.-P., Lavaysse C., Lavender S. L., Leroux S., Marteau R., Mounier F., Philippon N., Roehrig R., Sultan B., Taylor C.M. (2011). Intraseasonal variability of the West African monsoon. Atmospheric Science Letters, 12(1), 58-66. https://doi.org/10.1002/asl.280


Parard Gaelle, Lefevre Nathalie, Boutin Jacqueline (2010). Sea water fugacity of CO2 at the PIRATA mooring at 6 degrees S, 10 degrees W. Tellus Series B-chemical And Physical Meteorology, 62(5), 636-648. https://doi.org/10.1111/j.1600-0889.2010.00503.x


Koffi Urbain, Lefevre Nathalie, Kouadio Georges, Boutin Jacqueline (2010). Surface CO2 parameters and air-sea CO2 flux distribution in the eastern equatorial Atlantic Ocean. Journal Of Marine Systems, 82(3), 135-144. https://doi.org/10.1016/j.jmarsys.2010.04.010


Rhein Monika, Dengler Marcus, Sueltenfuss Juergen, Hummels Rebecca, Huettl-Kabus Sabine, Bourles Bernard (2010). Upwelling and associated heat flux in the equatorial Atlantic inferred from helium isotope disequilibrium. Journal Of Geophysical Research-oceans, 115(C08021), 1-14. https://doi.org/10.1029/2009JC005772


de Coetlogon Gaelle, Janicot Serge, Lazar Alban (2010). Intraseasonal variability of the ocean - atmosphere coupling in the Gulf of Guinea during boreal spring and summer. Quarterly Journal Of The Royal Meteorological Society, 136(s1), 426-441. https://doi.org/10.1002/qj.554


Lebel T., Parker D. J., Flamant C., Bourles Bernard, Marticorena B., Mougin E., Peugeot C., Diedhiou A., Haywood J. M., Ngamini J. B., Polcher J., Redelsperger J.-L, Thorncroft C. D. (2010). The AMMA field campaigns: Multiscale and multidisciplinary observations in the West African region. Quarterly Journal Of The Royal Meteorological Society, 136(s1), 8-33. https://doi.org/10.1002/qj.486


Reverdin Gilles, Marin Frederic, Bourles Bernard, Lherminier PascaleORCID (2009). XBT Temperature Errors during French Research Cruises (1999-2007). Journal Of Atmospheric And Oceanic Technology, 26(11), 2462-2473. Publisher's official version : https://doi.org/10.1175/2009JTECHO655.1 , Open Access version : https://archimer.ifremer.fr/doc/00133/24380/


Marin Frederic, Caniaux Guy, Bourles Bernard, Giordani Herve, Gouriou Yves, Key Erica (2009). Why Were Sea Surface Temperatures so Different in the Eastern Equatorial Atlantic in June 2005 and 2006? Journal Of Physical Oceanography, 39(6), 1416-1431. https://doi.org/10.1175/2008JPO4030.1


Kolodziejczyk N.ORCID, Bourles Bernard, Marin Frederic, Grelet Jacques, Chuchla R. (2009). Seasonal variability of the Equatorial Undercurrent at 10 degrees W as inferred from recent in situ observations. Journal Of Geophysical Research-oceans, 114(C06014), 1-16. https://doi.org/10.1029/2008JC004976


Bourras D., Weill A., Caniaux G., Eymard L., Bourles B., Letourneur S., Legain D., Key E., Baudin F., Piguet B., Traulle O., Bouhours G., Sinardet B., Barrie J., Vinson J. P., Boutet F., Berthod C., Clemencon Aurelien (2009). Turbulent air-sea fluxes in the Gulf of Guinea during the AMMA experiment. Journal Of Geophysical Research-oceans, 114(C04014), 1-12. https://doi.org/10.1029/2008JC004951


Lefevre Nathalie (2009). Low CO2 concentrations in the Gulf of Guinea during the upwelling season in 2006. Marine Chemistry, 113(1-2), 93-101. https://doi.org/10.1016/j.marchem.2009.01.001


Athie Gabriela, Marin Frederic (2008). Cross-equatorial structure and temporal modulation of intraseasonal variability at the surface of the Tropical Atlantic Ocean. Journal Of Geophysical Research-oceans, 113(C08020), 1-17. https://doi.org/10.1029/2007JC004332


Polo Irene, Lazar Alban, Rodriguez-Fonseca Belen, Arnault Sabine (2008). Oceanic Kelvin waves and tropical Atlantic intraseasonal variability: 1. Kelvin wave characterization. Journal Of Geophysical Research-oceans, 113(C07009), 1-18. https://doi.org/10.1029/2007JC004495


Lefevre Nathalie, Guillot Antoine, Beaumont Laurence, Danguy Theo (2008). Variability of fCO(2) in the Eastern Tropical Atlantic from a moored buoy. Journal Of Geophysical Research-oceans, 113(C1/C01015), 1-12. https://doi.org/10.1029/2007JC004146


Janicot S., Thorncroft C. D., Ali A., Asencio N., Berry G., Bock O., Bourles B., Caniaux G., Chauvin F., Deme A., Kergoat L., Lafore J.-P., Lavaysse C., Lebel T., Marticorena B., Mounier F., Nedelec P., Redelsperger J.-L., Ravegnani F., Reeves C. E., Roca R., de Rosnay P., Schlager H., Sultan B., Tomasini M., Ulanovsky A. (2008). Large-scale overview of the summer monsoon over West Africa during the AMMA field experiment in 2006. Annales Geophysicae, 26(9), 2569-2595. Publisher's official version : https://doi.org/10.5194/angeo-26-2569-2008 , Open Access version : https://archimer.ifremer.fr/doc/00203/31457/


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

Kouame Kanga Désiré, Kouassi Aka Marcel, Trokourey Albert, Toualy Elisée, N’guessan Benjamin K., Brehmer Patrice, Ostrowski Marek (2021). Spatial and Seasonal Variability of Mixed Layer Depth in the Tropical Atlantic at 10 °W using 40 Years of Observation Data. European Journal of Scientific Research / Revue Européenne de la recherche Scientifique, 158(3), 207-217. Open Access version : https://archimer.ifremer.fr/doc/00684/79619/


Nubi Oa, Bourles Bernard, Edokpayi Ca, Hounkonnou Norbert Mahouton (2014). Inter-annual variability on the influence of equatorial upwelling on biological productivity along 10oW in the Eastern Equatorial Atlantic (EEA). Journal of Biodiversity and Environmental Sciences (JBES), 4(1), 72-80.


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.


Bourles B, Brandt P, Caniaux G, Dengler M, Gouriou Y, Key E, Lumpkin R, Marin F, Molinari R L, Schmid C (2007). African Monsoon Multidisciplinary Analysis (AMMA) : Special measurements in the Tropical Atlantic. Clivar exchanges, 12(2), 7-9.


Thesis using campaign data

Dossa Alina Nathanaël (2021). Near-surface ocean dynamic off northeast Brazil and coastal sea surface salinity gradients in the world ocean. PhD Thesis, Universidade Federal de Pernambuco.


Papapostolou Athanasia (2017). Seasonal and Momentum Balance of the Atlantic Equatorial Undercurrent. PhD Thesis, University of Miami.