Thibaut Dauhut

AS Atmospheric Sciences

The 2017 Outstanding Student Poster and PICO (OSPP) Award is awarded to Thibaut Dauhut for the poster/PICO entitled:

An isentropic perspective of the atmospheric overturning induced by Hector the Convector (Dauhut, T.; Chaboureau, J.-P.; Mascart, P.; Pauluis, O.)

Click here to download the poster/PICO file.

I am a postdoctoral researcher at Laboratoire d’Aérologie (Université de Toulouse, CNRS, UPS) in Toulouse, France. I study how deep convection transports air and water into the tropical lower stratosphere. This transport impacts the composition and the radiative properties of the stratosphere, both of key importance for the future of our climate. I work with cutting-edge Large-Eddy Simulations (LES), with resolutions as fine as 100 m. I investigate the mesoscale processes that determine the capability of the very deep convective systems to hydrate the stratosphere.
The poster presented at the EGU 2017 illustrates the isentropic analysis, a convenient method to identify and quantify the irreversible vertical transport and the diabatic processes in any simulated convective system. In the Giga-LES of Hector the Convector, the overturning is organised into a tropospheric cell and an overshooting cell that crosses the tropopause. The mesoscale convective system owes its strength to the large latent heat release due to intense ice formation, and to the weak dilution of its updrafts.