J. L. Alves and A. Colin-de-verdière, Instability Dynamics of a Subtropical Jet and Applications to the Azores Front Current System: Eddy-Driven Mean Flow, Journal of Physical Oceanography, vol.29, issue.5, pp.832-864, 1999.
DOI : 10.1175/1520-0485(1999)029<0837:IDOASJ>2.0.CO;2

F. M. Bingham, G. R. Foltz, and M. J. Mcphaden, Characteristics of the seasonal cycle of the surface layer salinity in the global ocean, Ocean Sci, pp.915-929, 2012.

J. Boutin, P. Waldteufel, N. Martin, G. Caudal, and E. Dinnat, Surface Salinity Retrieved from SMOS Measurements over the Global Ocean: Imprecisions Due to Sea Surface Roughness and Temperature Uncertainties, Journal of Atmospheric and Oceanic Technology, vol.21, issue.9, pp.1432-144710, 2004.
DOI : 10.1175/1520-0426(2004)021<1432:SSRFSM>2.0.CO;2

J. Boutin, N. Martin, G. Reverdin, X. Yin, and F. Gaillard, Sea surface freshening inferred from SMOS and ARGO salinity: impact of rain, Ocean Science, vol.9, issue.1, pp.183-19210, 2013.
DOI : 10.5194/os-9-183-2013
URL : https://hal.archives-ouvertes.fr/hal-01496017

J. Busecke, A. L. Gordon, Z. Li, F. M. Bingham, and J. Font, Subtropical surface layer salinity budget and the role of mesoscale turbulence, Journal of Geophysical Research: Oceans, vol.6, issue.1, 2014.
DOI : 10.1175/2009JPO4018.1

D. B. Chelton, R. A. De-szoeke, and M. G. Schlax, Geographical Variability of the First Baroclinic Rossby Radius of Deformation, Journal of Physical Oceanography, vol.28, issue.3, pp.433-460, 1998.
DOI : 10.1175/1520-0485(1998)028<0433:GVOTFB>2.0.CO;2

S. T. Cole, D. L. Rudnick, and J. A. Colosi, Seasonal evolution of upper-ocean horizontal structure and the remnant mixed layer, Journal of Geophysical Research, vol.22, issue.C4, pp.10-1029, 2010.
DOI : 10.1029/2009JC005654

S. T. Cole and D. L. Rudnick, The spatial distribution and annual cycle of upper ocean thermohaline structure, Journal of Geophysical Research: Oceans, vol.22, issue.C7, pp.10-1029, 2012.
DOI : 10.1175/1520-0485(1992)022<1302:SSMITN>2.0.CO;2

C. Dong, J. C. Mcwilliams, Y. Liu, and D. Chen, Global heat and salt transports by eddy movement, Nature Communications, vol.35, issue.3294, pp.10-1038, 2014.
DOI : 10.1038/ncomms4294

R. Ferrari and D. L. Rudnick, Thermohaline varaibility in the upper ocean, J. Geophys. Res, vol.105883, issue.16, pp.857-1610, 2000.

R. Ferrari and F. Paparella, Compensation and Alignment of Thermohaline Gradients in the Ocean Mixed Layer, Journal of Physical Oceanography, vol.33, issue.11, pp.2214-2223, 2003.
DOI : 10.1175/1520-0485(2003)033<2214:CAAOTG>2.0.CO;2

N. I. Fisher, Statistical Analysis of Circular Data, 1993.
DOI : 10.1017/CBO9780511564345

J. Font, A. Camps, A. Borges, M. Martin-neira, J. Boutin et al., SMOS: The Challenging Sea Surface Salinity Measurement From Space, Proceedings of the IEEE, pp.649-665, 2009.
DOI : 10.1109/JPROC.2009.2033096
URL : https://hal.archives-ouvertes.fr/ird-00685317

F. Gaillard, E. Autret, V. Thierry, P. Galaup, C. Coatanoan et al., Quality Control of Large Argo Datasets, Journal of Atmospheric and Oceanic Technology, vol.26, issue.2, pp.337-351, 2009.
DOI : 10.1175/2008JTECHO552.1
URL : https://hal.archives-ouvertes.fr/hal-00384678

C. L. Gentemann, F. J. Wentz, C. A. Mears, and D. K. Smith, In situ validation of Tropical Rainfall Measuring Mission microwave sea surface temperatures, Journal of Geophysical Research, vol.16, issue.C4, 2004.
DOI : 10.1029/2003JC002092

. Res, C04021, doi:10, 1029.

A. L. Gordon and C. F. Giulivi, Ocean eddy freshwater flux convergence into the North Atlantic subtropics, Journal of Geophysical Research: Oceans, vol.6, issue.3-4, pp.3327-333510, 2012.
DOI : 10.1029/2000JC000736

S. A. Grodsky, G. Reverdin, J. A. Carton, and V. J. Cole, Year-to-year salinity changes in the Amazon plume: Contrasting 2011 and 2012 Aquarius/SACD and SMOS satellite data, Remote Sensing of Environment, vol.140, pp.14-22, 2014.
DOI : 10.1016/j.rse.2013.08.033
URL : https://hal.archives-ouvertes.fr/hal-01239541

S. A. Grodsky, J. A. Carton, and F. O. Bryan, A curious local surface salinity maximum in the northwestern tropical Atlantic, Journal of Geophysical Research: Oceans, vol.20, issue.1, pp.484-49510, 2014.
DOI : 10.1029/147GM07

A. Hasson, T. Delcroix, and J. Boutin, Formation and variability of the South Pacific Sea Surface Salinity maximum in recent decades, Journal of Geophysical Research: Oceans, vol.122, issue.9, pp.5109-5116, 2013.
DOI : 10.1175/jcli-d-10-05025.1
URL : https://hal.archives-ouvertes.fr/hal-00979259

O. Hernandez, J. Boutin, N. Kolodziejczyk, G. Reverdin, N. Martin et al., SMOS salinity in the subtropical North Atlantic salinity maximum: 1. Comparison with Aquarius and in situ salinity, Journal of Geophysical Research: Oceans, vol.46, issue.3, p.10, 1002.
DOI : 10.1109/TGRS.2008.915543
URL : https://hal.archives-ouvertes.fr/hal-01131556

C. O. Iselin, The influence of vertical and lateral turbulence on the characterization of waters at mid-depth, EOS Trans. AGU, pp.414-417, 1939.

G. C. Johnson, S. Schimidtko, and J. M. Lyman, Relative contributions of temperature and salinity to seasonal mixed layer density changes and horizontal density gradients, Journal of Geophysical Research: Oceans, vol.104, issue.C3, pp.401510-1029, 2012.
DOI : 10.1029/1998JD200088

F. M. Juliano and M. L. Alves, The Atlantic Subtropical Front/Current Systems of Azores and St. Helena, Journal of Physical Oceanography, vol.37, issue.11, pp.2573-2598, 2007.
DOI : 10.1175/2007JPO3150.1

J. Kainulainen, A. Colliander, J. Closa, M. Martin-neira, R. Oliva et al., Radiometric Performance of the SMOS Reference Radiometers&#x2014;Assessment After One Year of Operation, IEEE Transactions on Geoscience and Remote Sensing, vol.50, issue.5, pp.1367-1383, 2012.
DOI : 10.1109/TGRS.2011.2177273

N. Kolodziejczyk and F. Gaillard, Interannual variability of spiciness in the Pacific pycnocline, J. Geophys. Res, vol.117, pp.10-1029, 2012.
URL : https://hal.archives-ouvertes.fr/hal-00783579

N. Kolodziejczyk and F. Gaillard, Variability of the Heat and Salt Budget in the Subtropical Southeastern Pacific Mixed Layer between 2004 and 2010: Spice Injection Mechanism, Journal of Physical Oceanography, vol.43, issue.9, pp.1880-1898, 2013.
DOI : 10.1175/JPO-D-13-04.1
URL : https://hal.archives-ouvertes.fr/hal-01151324

J. Marshall and F. Schott, Open-ocean convection: Observations, theory, and models, Reviews of Geophysics, vol.28, issue.20, pp.1-64, 1999.
DOI : 10.1029/98RG02739

J. Mignot, A. Lazar, and M. Lacarra, On the formation of barrier layers and associated vertical temperature inversions: A focus on the northwestern tropical Atlantic, Journal of Geophysical Research: Oceans, vol.78, issue.11, 2012.
DOI : 10.1029/2007GC001809
URL : https://hal.archives-ouvertes.fr/hal-00753362

. Gruhier, SMOS Radio Frequency Interference scenario: Status and actions taken to improve the RFI environment in the 1400-1427-MHz passive band, IEEE Trans. Geos. Remote Sens, vol.30, issue.5, pp.1427-1439, 2012.
URL : https://hal.archives-ouvertes.fr/ird-00701133

N. Reul, B. Chapron, T. Lee, C. Donlon, J. Boutin et al., 2014: Sea Surface Salinity structure of the meandering Gulf Stream revealed by SMOS sensor, Geophys. Res

N. Reul, J. Tenerelli, J. Boutin, B. Chapron, F. Paul et al., Overview of the First SMOS Sea Surface Salinity Products. Part I: Quality Assessment for the Second Half of 2010, IEEE Transactions on Geoscience and Remote Sensing, vol.50, issue.5, pp.1636-1647
DOI : 10.1109/TGRS.2012.2188408
URL : https://hal.archives-ouvertes.fr/hal-00717291

G. Reverdin, E. Kestenare, C. Franckignoul, and T. Delcroix, Surface salinity in the Atlantic Ocean (30??S???50??N), Surface salinity in the Atlantic Ocean (30°S?50°N), pp.311-340, 2007.
DOI : 10.1016/j.pocean.2006.11.004
URL : https://hal.archives-ouvertes.fr/hal-00161734

G. Roden, Thermohaline Structure, Fronts, and Sea-Air Energy Exchange of the Trade Wind Region East of Hawaii, Journal of Physical Oceanography, vol.4, issue.2, pp.168-182, 1974.
DOI : 10.1175/1520-0485(1974)004<0168:TSFASA>2.0.CO;2

G. I. Roden, Mesoscale flow and thermocline structure around Fieberling Seamount, J. Geophys. Res, vol.96672, issue.16, pp.653-669, 1991.

B. Ruddick, A practical indicator of stability of the water column to double-diffusive activity, Deep-Sea Res, pp.105-106, 1983.

D. L. Rudnick and J. R. Luyten, Intensive surveys of the Azores Front: 1. Tracers and dynamics, Journal of Geophysical Research: Oceans, vol.30, issue.C1, pp.923-939, 1996.
DOI : 10.1029/95JC02867

D. L. Rudnick and R. Ferrari, Compensation of Horizontal Temperature and Salinity Gradients in the Ocean Mixed Layer, Science, vol.283, issue.5401, pp.526-529, 1999.
DOI : 10.1126/science.283.5401.526

D. L. Rudnick and J. P. Martin, On the horizontal density ratio in the upper ocean, Dynamics of Atmospheres and Oceans, vol.36, issue.1-3, pp.3-21, 2002.
DOI : 10.1016/S0377-0265(02)00022-2

Y. Tanguy, S. Arnault, and P. Lattes, Isothermal, mixed layers and barriers layers in the tropical and sub-tropical Atlantic ocean during the ARAMIS experiment, Deep Sea Res. I, 2010.

R. Sabia, M. Klockmann, and C. Donlon, Satellite-Based T-S Diagrams: A Prospective Tool to Trace Ocean Water Masses, Proceedings of ESA Living planet symposium, pp.9-13, 2013.

H. M. Stommel, Determination of water mass properties of water pumped down from the Ekman layer to the geostrophic flow below, Proceedings of the National Academy of Sciences, vol.76, issue.7, pp.3051-3055, 1979.
DOI : 10.1073/pnas.76.7.3051

H. M. Stommel, A Conjectural Regulating Mechanism for Determining the Thermohaline Structure of the Oceanic Mixed Layer, Journal of Physical Oceanography, vol.23, issue.1, pp.142-148, 1993.
DOI : 10.1175/1520-0485(1993)023<0142:ACRMFD>2.0.CO;2

D. L. Volkov and L. Fu, On the Reasons for the Formation and Variability of the Azores Current, Journal of Physical Oceanography, vol.40, issue.10, pp.2197-2220, 2010.
DOI : 10.1175/2010JPO4326.1

G. S. Yeager and W. G. Large, Observational Evidence of Winter Spice Injection, Journal of Physical Oceanography, vol.37, issue.12, pp.2895-2019, 2007.
DOI : 10.1175/2007JPO3629.1

W. R. Young, The Subinertial Mixed Layer Approximation, Journal of Physical Oceanography, vol.24, issue.8, pp.1812-1826, 1994.
DOI : 10.1175/1520-0485(1994)024<1812:TSMLA>2.0.CO;2