@article{fdi:010088931,
  title = {{A} numerical study of ocean surface-layer response to atmospheric shallow convection : impact of cloud shading, rain, and cold pools},
  author = {{B}rilouet, {P}ierre-etienne and {R}edelsperger, {J}. {L}. and {B}ouin, {M}. {N}. and {C}ouvreux, {F}. and {V}illefranque, {N}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he response of the oceanic surface layer to atmospheric shallow convection is explored using realistic atmospheric large eddy simulations coupled with an oceanic 1{D} model with high vertical resolution. {T}he effects of cloud shading, rain, and enhanced heat loss due to gust fronts on the edge of cold pools and their interactions are investigated in a case study of the {C}ooperative {I}ndian {O}cean {E}xperiment on {I}ntraseasonal {V}ariability/{D}ynamics of the {M}adden-{J}ulian {O}scillation experiment in the tropical {I}ndian {O}cean, during a suppressed phase of the {M}adden-{J}ulian {O}scillation. {C}onditions of low surface wind and strong solar heating result in diurnal warming of the oceanic surface of 2 degrees {C} over a depth of 1 m. {A}nalysis of specific periods covering the diurnal cycle shows the contrasting effects of cloud shading, rain, and turbulent heat fluxes under the cold pools on the sea temperature at the surface and below. {O}n the one hand, decreasing the solar radiation (cloud shading) results in slight cooling extended horizontally and penetrating down to 1-2 m depth, depending on the time of the day. {O}n the other hand, turbulent heat fluxes enhanced up to 300 {W}.m-2 by gusts and freshwater lenses due to rain act together and more locally. {T}hey isolate and strongly cool a thin inner layer at the surface, which eventually destabilizes the surface layer and propagates the cooling downward. {T}he exact relative part and efficiency of these processes depend on the time evolution of the thermal stratification and vertical turbulent mixing in the oceanic upper layer. {S}urface cooling of up to -0.5 degrees {C} may occur in a few tens of minutes and last for several hours, significantly mitigating the effects of diurnal warming over large extents. {D}uring a diurnal warm layer event, the oceanic surface layer is reactive to atmospheric shallow convection such as cloud shading, rain, and enhanced heat loss due to cold pools. {A} surface cooling of up to 0.5 degrees {C} may occur in a few tens of minutes and last for several hours, significantly mitigating the effects of diurnal warming over large extents.image},
  keywords = {atmospheric shallow convection ; {CINDY}-{DYNAMO} ; cloud shading ; cold pool ; diurnal warm layer ; freshwater lens ; large eddy simulation ; oceanic ; surface layer},
  booktitle = {},
  journal = {{Q}uarterly {J}ournal of the {R}oyal {M}eteorological {S}ociety},
  volume = {[{E}arly access]},
  numero = {},
  pages = {[19 p.]},
  ISSN = {0035-9009},
  year = {2024},
  DOI = {10.1002/qj.4651},
  URL = {https://www.documentation.ird.fr/hor/fdi:010088931},
}