@article{fdi:010083989, title = {{M}odulation of equatorial turbulence by tropical instability waves}, author = {{L}ien, {R}.{C}. and {D}'{A}saro, {E}.{A}. and {M}enk{\`e}s, {C}hristophe}, editor = {}, language = {{ENG}}, abstract = {{T}he sea surface temperature in the {P}acific equatorial cold tongue is influenced strongly by the turbulent entrainment flux. {A} numerical model using a level-1.5 turbulence closure scheme suggests strong modulation of the entrainment flux by tropical instability waves ( {TIW}s). {T}urbulence observations taken by a {L}agrangian float encountering a {TIW} confirm the spatial pattern of turbulent flux variation predicted by the model. {T}he strongest observed turbulence mixing occurred at the leading edge of the {TIW} trough; turbulence diffusivity {K} similar to 10(-2) m(2) s(-1) and turbulent heat flux {Q} similar to 1000 {W} m(-2) at the base of surface mixed layer. {T}he weakest observed turbulence occurred at similar to 2 degrees south of the {TIW} trough; {K} similar to 10(-4) m(2) s(-1) and {Q} similar to 10 {W} m(-2). {T}he {TIW} caused nearly two decades of turbulence variation within an {O}( 1000 km) zonal scale and {O}( 100 km) meridional scale. {M}odel results suggest that the increased entrainment heat flux at the leading edge of the {TIW} trough can be explained by the enhancement of shear at the surface mixed layer base modulated by the {TIW}s. {C}itation: {L}ien, {R}.-{C}., {E}. {A}. {D}'{A}saro, and {C}. {E}. {M}enkes ( 2008), {M}odulation of equatorial turbulence by tropical instability waves, {G}eophys. {R}es. {L}ett., 35, {L}24607, doi: 10.1029/2008{GL}035860.}, keywords = {{ZONE} {EQUATORIALE}}, booktitle = {}, journal = {{G}eophysical {R}esearch {L}etters}, volume = {35}, numero = {24}, pages = {{L}24607}, ISSN = {0094-8276}, year = {2008}, DOI = {10.1029/2008gl035860}, URL = {https://www.documentation.ird.fr/hor/fdi:010083989}, }