@article{fdi:010066758, title = {{I}ntraseasonal variability of mixed layer depth in the tropical {I}ndian {O}cean}, author = {{K}eerthi, {M}. {G}. and {L}engaigne, {M}atthieu and {D}rushka, {K}. and {V}ialard, {J}{\'e}r{\^o}me and {M}ontegut, {C}. {D}. and {P}ous, {S}. and {L}evy, {M}. and {M}uraleedharan, {P}. {M}.}, editor = {}, language = {{ENG}}, abstract = {{I}n this paper, we use an observational dataset built from {A}rgo in situ profiles to describe the main large-scale patterns of intraseasonal mixed layer depth ({MLD}) variations in the {I}ndian {O}cean. {A}n eddy permitting (0.25{A} degrees) regional ocean model that generally agrees well with those observed estimates is then used to investigate the mechanisms that drive {MLD} intraseasonal variations and to assess their potential impact on the related {SST} response. {D}uring summer, intraseasonal {MLD} variations in the {B}ay of {B}engal and eastern equatorial {I}ndian {O}cean primarily respond to active/break convective phases of the summer monsoon. {I}n the southern {A}rabian {S}ea, summer {MLD} variations are largely driven by seemingly-independent intraseasonal fluctuations of the {F}indlater jet intensity. {D}uring winter, the {M}adden-{J}ulian {O}scillation drives most of the intraseasonal {MLD} variability in the eastern equatorial {I}ndian {O}cean. {L}arge winter {MLD} signals in northern {A}rabian {S}ea can, on the other hand, be related to advection of continental temperature anomalies from the northern end of the basin. {I}n all the aforementioned regions, peak-to-peak {MLD} variations usually reach 10 m, but can exceed 20 m for the largest events. {B}uoyancy flux and wind stirring contribute to intraseasonal {MLD} fluctuations in roughly equal proportions, except for the {N}orthern {A}rabian {S}ea in winter, where buoyancy fluxes dominate. {A} simple slab ocean analysis finally suggests that the impact of these {MLD} fluctuations on intraseasonal sea surface temperature variability is probably rather weak, because of the compensating effects of thermal capacity and sunlight penetration: a thin mixed-layer is more efficiently warmed at the surface by heat fluxes but loses more solar flux through its lower base.}, keywords = {{OCEAN} {INDIEN} ; {ZONE} {TROPICALE}}, booktitle = {}, journal = {{C}limate {D}ynamics}, volume = {46}, numero = {7-8}, pages = {2633--2655}, ISSN = {0930-7575}, year = {2016}, DOI = {10.1007/s00382-015-2721-z}, URL = {https://www.documentation.ird.fr/hor/fdi:010066758}, }