|From||Veronique DUCROCQ <firstname.lastname@example.org>|
|Date||Sat, 03 Mar 2012 11:00:12 +0100|
PhD Title: Air-sea coupled modelling: application to high-impact weather events in Mediterranean
PhD supervisors: Dr. Véronique Ducrocq, Dr. Hervé Giordani
Deadline for application: 7 March 2012
PhD goals, proposed methodology:
The Mediterranean regions are frequently affected by heavy precipitation and strong winds. These intense atmospheric events strongly influence not only the upper ocean circulation but also the dense water formation and thus the Mediterranean Sea thermohaline circulation at the basin scale. As feedbacks, the Mediterranean Sea constitutes a significant source of moisture for heavy precipitation events, about half of the water vapour feeding them is extracted from the Mediterranean Sea. Past numerical studies have studied the sensitivity to the Sea Surface Temperature (SST) and air-sea fluxes parameterization of the kilometric-scale atmospheric forecasts. It has been shown that the both can influence the location and intensity of heavy precipitation systems. In addition, it has been found that high-temporal (<3h) and spatial (2-3 km) atmospheric forecasts are required to be able to reproduce the impact of the intense atmospheric events on the ocean mixing layer with the driven ocean model.
The PhD aims at developing a coupling between the convection-permitting numerical weather prediction AROME model and the NEMO ocean model in order to (i) to simultaneously improve the representation of atmospheric and ocean boundary layers and (ii) to study the air-sea coupled processes before, during and after extreme weather events.
During the first year, the O/A models coupling will be adapted to the western Mediterranean basin. It will be then validating using a dedicated version of AROME covering the western Mediterranean basin (AROME-WMED) and the NEMO model for the Mediterranean Sea basin (NEMO-MED). Its benefit with respect to one-way coupling ocean or atmospheric models will be assessed.
The HyMeX (http://www.hymex.org) field campaigns in 2012 and 2013 will provide the ocean and atmospheric boundary layers observations for validation of the model simulations and for the study of air-sea coupled processes during intense events. Among the instrumented platforms, one can mention the gliders, argo floats, drifting surface buoys, drifting atmospheric boundary layer balloons that will provide simultaneous measurements in atmospheric and ocean boundary layers. Air-sea flux measurements onboard aircraft and vessel will be also performed.
Eventually, some refinements of the air-sea interface description (vertical resolution near the air-sea interface, ocean state, …) within the ocean and atmospheric models will be introduced and evaluated with respect to the air-sea interaction during intense atmospheric events.
Required knowledge and experience :
Candidates (citizens from the European Union or Switzerland, under age 27) should have or will obtain in 2012 a master degree in Ocean, Atmospheric, Environmental Sciences or equivalent. The applicant should be familiar with programming languages (Fortran, Unix,…), background in numerical modelling is welcome.
French or English spoken, English well-written.
For full consideration, the applicant should sent a detailed CV by March, 7 to :
If selected, the candidate will have to submit an application to the armaments (DGA) portal by March, 15
-- Dr. Véronique Ducrocq Mesoscale Meteorology Division, Head CNRM-GAME (Météo-France & CNRS) 42 Av G.Coriolis 31057 TOULOUSE CEDEX France Tel: +33.561.07.96.02 Mob: +33.688.24.35.08 Fax: +33.561.07.96.26 mailto:Veronique.email@example.com http://www.cnrm.meteo.fr/gmme/ information about the HyMeX Program: http://www.hymex.org/
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