@article{fdi:010060863, title = {{T}ropical storm-induced near-inertial internal waves during the {C}irene experiment : energy fluxes and impact on vertical mixing}, author = {{C}uypers, {Y}. and {L}e {V}aillant, {X}. and {B}ouruet-{A}ubertot, {P}. and {V}ialard, {J}{\'e}r{\^o}me and {M}c{P}haden, {M}. {J}.}, editor = {}, language = {{ENG}}, abstract = {{N}ear-inertial internal waves ({NIW}) excited by storms and cyclones play an essential role in driving turbulent mixing in the thermocline and interior ocean. {S}torm-induced mixing may be climatically relevant in regions like the thermocline ridge in the southwestern {I}ndian {O}cean, where a shallow thermocline and strong high frequency wind activity enhance the impact of internal gravity wave-induced mixing on sea surface temperature. {T}he {C}irene research cruise in early 2007 collected ship-borne and mooring vertical profiles in this region under the effect of a developing tropical cyclone. {I}n this paper, we characterize the {NIW} field and the impact of these waves on turbulent mixing in the upper ocean. {NIW} packets were identified down to 1000 m, the maximum depth of the measurements. {W}e estimated an {NIW} vertical energy flux of up to 2.5 m {W}m(-2) within the pycnocline, which represents about 10% of the maximum local wind power input. {A} non-negligible fraction of the wind power input is hence potentially available for subsurface mixing. {T}he impact of mixing by internal waves on the upper ocean heat budget was estimated from a fine-scale mixing parameterization. {D}uring the first leg of the cruise (characterized by little {NIW} activity), the average heating rate due to mixing was similar to 0.06 degrees {C} month(-1) in the thermocline (23-24 k gm(-3) isopycnals). {D}uring the second leg, characterized by strong {NIW} energy in the thermocline and below, this heating rate increased to 0.42 degrees {C} month(-1), indicative of increased shear instability along near inertial wave energy pathways.}, keywords = {}, booktitle = {}, journal = {{J}ournal of {G}eophysical {R}esearch. {O}ceans}, volume = {118}, numero = {1}, pages = {358--380}, ISSN = {0148-0227}, year = {2013}, DOI = {10.1029/2012jc007881}, URL = {https://www.documentation.ird.fr/hor/fdi:010060863}, }