Seasonal cycle of the salinity barrier layer revealed in the northeastern Gulf of Guinea

References

• Adler RF, Huffman GJ, Chang A, Ferraro R, Xie P, Janowiak J et al. 2003. The Version-2 Global Precipitation Climatology Project (GPCP) monthly precipitation analysis (1979–present). Journal of Hydrometeorology 4: 1147–1167. doi: 10.1175/1525-7541(2003)004<1147:TVGPCP>2.0.CO;2
   Web of Science ®Google Scholar
• Ando K, McPhaden MJ. 1997. Variability of surface layer hydrography in the tropical Pacific Ocean. Journal of Geophysical Research 102(C10): 23063–23078. doi: 10.1029/97JC01443
   Web of Science ®Google Scholar
• Behrens E, Biastoch A, Böning CW. 2013. Spurious AMOC trends in global ocean sea-ice models related to subarctic freshwater forcing. Ocean Modelling 69: 39–49. doi: 10.1016/j.ocemod.2013.05.004
   Web of Science ®Google Scholar
• Berger H, Tréguier A, Perenne N, Talandier C. 2014. Dynamical contribution to sea surface salinity variations in the eastern Gulf of Guinea based on numerical modeling. Climate Dynamics 43: 3105–3122. doi: 10.1007/s00382-014-2195-4
   Web of Science ®Google Scholar
• Bourlès B, D’Orgeville M, Eldin G, Chuchla R, Gouriou Y, du Penhoat Y, Arnault S. 2002. On the thermocline and subthermocline eastward currents evolution in the Eastern Equatorial Atlantic. Geophysical Research Letters 29: 32-1–32-4. doi: 10.1029/2002GL015098
   Web of Science ®Google Scholar
• Bourlès B, Brandt P, Caniaux G, Dengler M, Gouriou Y, Key E et al. 2007. African Monsoon Multidisciplinary Analysis (AMMA): special measurements in the tropical Atlantic. CLIVAR Exchange No. 41 (vol. 12). Qingdao, China: Climate Variability and Predictability Programme. pp 7–9.
   Google Scholar
• Boutin J, Vergely JL, Marchand S, D’Amico F, Hasson A, Kolodziejczyk N et al. 2018. New SMOS sea surface salinity with reduced systematic errors and improved variability. Remote Sensing of Environment 214: 115–134. doi: 10.1016/j.rse.2018.05.022
   Web of Science ®Google Scholar
• Breugem W-P, Chang P, Jang CJ, Mignot J, Hazeleger W. 2008. Barrier layers and tropical Atlantic SST biases in coupled GCMs. Tellus Series A 60: 885–897. doi: 10.1111/j.1600-0870.2008.00343.x
   Google Scholar
• Camara I, Kolodziejczyk N, Mignot J, Lazar A, Gaye AT 2015. On the seasonal variations of salinity of the tropical Atlantic mixed layer. Journal of Geophysical Research: Oceans 120: 4441–4462.
   Web of Science ®Google Scholar
• Cronin MF, McPhaden MJ. 2002. Barrier layer formation during westerly wind bursts. Journal of Geophysical Research: Oceans 107(C12): SRF 21-1–SRF 21-12. doi: 10.1029/2001JC001171
   Web of Science ®Google Scholar
• Da-Allada CY, Alory G, du Penhoat Y, Kestenare E, Durand F, Hounkonnou NM. 2013. Seasonal mixed-layer salinity balance in the Tropical Atlantic Ocean: mean state and seasonal cycle. Journal of Geophysical Research: Oceans 118: 332–345.
   Web of Science ®Google Scholar
• Da-Allada CY, Alory G, du Penhoat Y, Jouanno J, Hounkonnou NM, Kestanare E. 2014a. Causes for the recent increase in sea surface salinity in the north-eastern Gulf of Guinea. African Journal of Marine Science 36: 197–205. doi: 10.2989/1814232X.2014.927398
   Web of Science ®Google Scholar
• Da-Allada CY, du Penhoat Y, Jouanno J, Alory G, Hounkonnou NM. 2014b. Modeled mixed-layer salinity balance in the Gulf of Guinea: seasonal and interannual variability. Ocean Dynamics 64: 1783–1802. doi: 10.1007/s10236-014-0775-9
   Web of Science ®Google Scholar
• Da-Allada CY, Gaillard F, Kolodziejczyk N. 2015. Mixed-layer salinity budget in the tropical Indian Ocean: seasonal cycle based only from observations. Ocean Dynamics 65: 845–857. doi: 10.1007/s10236-015-0837-7
   Web of Science ®Google Scholar
• Da-Allada CY, Jouanno J, Gaillard F, Kolodziejczyk N, Maes C, Reul N, Bourlès B. 2017. Importance of the Equatorial Undercurrent on the sea surface salinity in the eastern equatorial Atlantic in boreal spring. Journal of Geophysical Research: Oceans 122: 521–538.
   Web of Science ®Google Scholar
• Dai A, Trenberth K. 2002. Estimates of freshwater discharge from continents: latitudinal and seasonal variations. Journal of Hydrometeorology 3: 660–687. doi: 10.1175/1525-7541(2002)003<0660:EOFDFC>2.0.CO;2
   Web of Science ®Google Scholar
• de Boyer Montégut CB, Madec G, Fischer AS, Lazar A, Ludicone D. 2004. Mixed layer depth over the global ocean: an examination of profile data and a profile-based climatology. Journal of Geophysical Research 109: C12003. doi: 10.1029/2004JC002378
   Web of Science ®Google Scholar
• de Boyer Montégut CB, Mignot J, Lazar A, Cravatte S. 2007. Control of salinity on the mixed layer depth in the world ocean: 1. General description. Journal of Geophysical Research 112: C06011. doi: 10.1029/2006JC003953
   Web of Science ®Google Scholar
• Dee DP, Uppala SM, Simmons AJ, Berrisford P, Poli P, Kobayashi S et al. 2011. The ERA-Interim reanalysis: configuration and performance of the data assimilation system. Quarterly Journal of the Royal Meteorological Society 137: 553–597. doi: 10.1002/qj.828
   Web of Science ®Google Scholar
• Donguy JR, Privé M. 1964. Les conditions de l’Atlantique entre Abidjan et l’équateur – 2e partie. Variations hydrauliques annuelles entre Abidjan et l’Equateur. Cahiers Océanographiques 16: 393-398.
   Google Scholar
• Foltz GR, Grodsky SA, Carton JA. 2003. Seasonal mixed layer heat budget of the tropical Atlantic Ocean. Journal of Geophysical Research 108: 3146. doi: 10.1029/2002JC001584
   Web of Science ®Google Scholar
• Gaillard F, Reynaud T, Thierry V, Kolodziejczyk N, von Schuckmann K. 2016. In situ based reanalysis of the global ocean temperature and salinity with ISAS: variability of the heat content and steric height. Journal of Climate 29: 1305–1323. doi: 10.1175/JCLI-D-15-0028.1
   Web of Science ®Google Scholar
• Godfrey JS, Lindstrom EJ. 1989. The heat budget of the equatorial western Pacific surface mixed layer. Journal of Geophysical Research 94: 8007–8017. doi: 10.1029/JC094iC06p08007
   Web of Science ®Google Scholar
• Guiavarc’h C. 2003. Analyse de la salinité dans les couches supérieures du Golfe de Guinée. Rapport de stage de DEA Océanologie, Météorologie et Environnement. Brest, France: Université de Bretagne Occidentale.
   Google Scholar
• Haidvogel DB, Beckmann A. 1999. Numerical ocean circulation modeling. London: Imperial College Press. doi: 10.1142/p097
   Google Scholar
• Herbert G, Bourlès B, Penven P, Grelet J. 2016. New insight on the upper layer circulation north of Gulf of Guinea. Journal of Geophysical Research: Oceans 121: 6793–6815.
   Web of Science ®Google Scholar
• Hisard P. 1975. La circulation superficielle dans la partie occidentale du Golfe de Guinée. Documents Scientifiques No. 6. Abidjan: Centre de Recherches Océanographiques. pp 41–57.
   Google Scholar
• Hisard P, Merle J. 1979. Onset of summer surface cooling in the Gulf of Guinea during GATE. Deep-Sea Research 26 (suppl.): 325–341.
   Google Scholar
• Kolodziejczyk N, Marin F, Bourlès B, Gouriou Y, Berger H. 2014. Seasonal variability of the Equatorial Undercurrent termination and associated salinity maximum in the Gulf of Guinea. Climate Dynamics 43: 3025–3046. doi: 10.1007/s00382-014-2107-7
   Web of Science ®Google Scholar
• Large WG, Danabasoglu G, Doney SC, McWilliams JC. 1997. Sensitivity to surface forcing and boundary layer mixing in a global ocean model: annual-mean climatology. Journal of Physical Oceanography 27: 2418–2447. doi: 10.1175/1520-0485(1997)027<2418:STSFAB>2.0.CO;2
   Web of Science ®Google Scholar
• Lukas R, Lindström EJ. 1991. The mixed layer of the western equatorial Pacific Ocean. Journal of Geophysical Research 96 (suppl.): 3343–3357. doi: 10.1029/90JC01951
   Google Scholar
• Maes C, Picaut J, Belamari S. 2002. Salinity barrier layer and onset of El Niño in a Pacific coupled model. Geophysical Research Letters 29: article 2206. doi: 10.1029/2002GL016029
   Web of Science ®Google Scholar
• Mignot J, de Boyer Montégut C, Lazar A, Cravatte S. 2007. Control of salinity on the mixed layer depth in the world ocean: 2. Tropical areas. Journal of Geophysical Research 112: C10010. doi: 10.1029/2006JC003954
   Web of Science ®Google Scholar
• Monterey G, Levitus S. 1997. Seasonal variability of mixed layer depth for the world ocean. NOAA Atlas NESDIS No. 14. Washington DC: US Department of Commerce.
   Google Scholar
• Pailler K, Bourlès B, Gouriou Y. 1999. The barrier layer in the western tropical Atlantic Ocean. Journal of Geophysical Research 26: 2069–2072. doi: 10.1029/1999GL900492
   Google Scholar
• Papa F, Durand F, Rossow WB, Rahman A, Bala SK. 2010. Satellite altimeter-derived monthly discharge of the Ganga-Brahmaputra River and its seasonal to interannual variations from 1993 to 2008. Journal of Geophysical Research 115: C12013. doi: 10.1029/2009JC006075
   Web of Science ®Google Scholar
• Prasanna Kumar S, Nuncio M, Narvekar J, Kumar A, Sardesai S, de Souza SN et al. 2004. Are eddies nature’s trigger to enhance biological productivity in the Bay of Bengal? Geophysical Research Letters 29: 88- 1–88-4.
   Google Scholar
• Rao RR, Sivakumar R. 2003. Seasonal variability of sea surface salinity and salt budget of the mixed layer of the north Indian Ocean. Journal of Geophysical Research 108: 3009. doi: 10.1029/2001JC000907
   Web of Science ®Google Scholar
• Redelsperger J-L, Thorncroft CD, Diedhiou A, Lebel T, Parker DJ, Polcher J. 2006. African Monsoon Multidisciplinary Analysis: an international research project and field campaign. Bulletin of the American Meteorological Society 87: 1739–1746. doi: 10.1175/BAMS-87-12-1739
   Web of Science ®Google Scholar
• Shchepetkin AF, McWilliams J-C. 2005. The regional oceanic modeling system (ROMS): a split-explicit, free-surface, topography-following-coordinate oceanic model. Ocean Modelling 9: 347–404. doi: 10.1016/j.ocemod.2004.08.002
   Web of Science ®Google Scholar
• Shetye SR, Gouveia AD, Shankar D, Shenoi SSC, Vinayachandran P, Sundar N et al. 1996. Hydrography and circulation in the western bay of Bengal during the northeast monsoon. Journal of Geophysical Research 101: 14011–14025. doi: 10.1029/95JC03307
   Web of Science ®Google Scholar
• Spall MA, Weller RA, Furey PW. 2000. Modeling the three-dimensional upper ocean heat budget and subduction rate during the Subduction Experiment. Journal of Geophysical Research 105: 26151–26166. doi: 10.1029/2000JC000228
   Web of Science ®Google Scholar
• Sprintall J, Tomczak M. 1992. Evidence of the barrier layer in the surface layer of the tropics. Journal of Geophysical Research 97: 7305–7316. doi: 10.1029/92JC00407
   Web of Science ®Google Scholar
• Tanguy Y, Arnault S, Lattes P. 2010. Isothermal, mixed, and barrier layers in the subtropical and tropical Atlantic Ocean during the ARAMIS experiment. Deep-Sea Research I 57: 501–517. doi: 10.1016/j.dsr.2009.12.012
   Google Scholar
• Varkey MJ, Murty VSN, Suryanarayana A. 1996. Physical oceanography of the Bay of Bengal and Andaman Sea. In: Ansell AD, Gibson RN, Barnes M (eds), Oceanography and marine biology: an annual review, vol. 34. London: Allen and Unwin. pp 1–70.
   Web of Science ®Google Scholar