@article{fdi:010063134, title = {{SMOS} {S}ea {S}urface {S}alinity signals of tropical instability waves}, author = {{Y}in, {X}. {B}. and {B}outin, {J}. and {R}everdin, {G}. and {L}ee, {T}. and {A}rnault, {S}abine and {M}artin, {N}.}, editor = {}, language = {{ENG}}, abstract = {{S}ea {S}urface {S}alinity ({SSS}) measurements from the {S}oil {M}oisture and {O}cean {S}alinity ({SMOS}) mission provide an unprecedented opportunity to observe the salinity structure of tropical instability waves ({TIW}s) from space, especially during the intense 2010 {L}a {N}ina condition. {I}n the eastern equatorial {P}acific {O}cean, {SMOS} {SSS} signals correlate well and have similar amplitude to 1 m salinity from the {T}ropical {A}tmosphere {O}cean ({TAO}) array at six locations with strong {TIW} signals. {A}t these locations, the linear negative relationships between {SMOS} {SSS} and {OSTIA} {SST} signals vary from -0.20 degrees {C}-1 to -0.25 degrees {C}-1, which are comparable to the ones obtained from {TAO}. {F}rom {J}une to {D}ecember 2010, the largest {TIW} signals and meridional gradients of both {SSS} and {SST} appear around 2 degrees {N} west of 100 degrees {W}. {T}hey shift southward and cross the equator at 90 degrees {W}. {I}n addition to the large negative correlation band around 2 degrees {N}, a band of negative correlations between {SSS} and {SST} signals also exists around 8 degrees {N} west of 110 degrees {W} for the 33 day signals. {T}he peak amplitude of the 33 day {SMOS} {SSS} signals west of 135 degrees {W} is reduced by >40% with respect to values east of 135 degrees {W}, while the reduction for {SST} is much lower (<20%). {T}he amplitudes and longitudinal extents of {TIW} signals and the dominant westward propagation speed of 17 day {TIW}s (as detected by {SMOS} and {A}quarius) at the equator decrease from 2010 to 2013 associated with the transition from a strong {L}a {N}ina to non-{L}a {N}ina conditions.}, keywords = {{SMOS} ; {S}ea {S}urface {S}alinity ; tropical instability waves ; {PACIFIQUE} ; {ZONE} {EQUATORIALE}}, booktitle = {}, journal = {{J}ournal of {G}eophysical {R}esearch : {O}ceans}, volume = {119}, numero = {11}, pages = {7811--7826}, ISSN = {2169-9275}, year = {2014}, DOI = {10.1002/2014jc009960}, URL = {https://www.documentation.ird.fr/hor/fdi:010063134}, }