|From||COUVREUX Fleur <firstname.lastname@example.org>|
|Date||Fri, 28 Jun 2019 12:27:02 +0200 (CEST)|
The CNRM is offering a Post-doctoral position in atmospheric processes on Mesoscale organization of shallow clouds within the trade wind Required education: PhD in atmospheric science From: as soon as 1st January Duration: 18 months Salary: from 2300 to 2500 euros net/month depending on experience (CNRS salary grid) Contact: Fleur couvreux (CNRM, email@example.com); Dominique Bouniol (CNRM, firstname.lastname@example.org) Application: should include a CV, statement of research activities and interests as well as the contact information for two referees Application closure date: 30/10/2019 TROPICS, the host team, has a specific expertise on atmospheric convective processes, including their numerical modelling with both Large Eddy simulations and mesoscale models and their observations with in particular satellite data. In the last decade, the members of the team have been involved in numerous studies on boundary-layer and convective processes. Topic: Mechanisms of organization of shallow cumulus clouds investigated with observations and Large-Eddy simulations = = = = Background: = = = = == CONSTRAIN (http://www.umr-cnrm.fr/constrain/) is a 4-year project funded by the European Union that starts in May 2019. It aims at significantly improving our understanding of how natural and human factors affect multidecadal regional climate change in order to improve our capability to make climate projections for the next 20-50 years. It will rely on the combined analyses of CMIP6 runs with dedicated high resolution simulations and new observations to address identified knowledge gaps on radiative forcing, cloud feedbacks and the relationship between ocean variability and atmospheric change. One important objective is to make large use of observational data and in particular takes advantage of the dedicated field campaign on shallow cumulus, EUREC4A, that will take place in January-February 2020 over Barbados (Bony et al. 2017). This field campaign will provide observations of the low-cloud amount, of the lower vertical mixing of water vapour, and of the thermodynamic and dynamic environment in which the clouds form. Work plan: By using observations from spaceborne sensors and from the EUREC4A field campaign, we will characterize the mesoscale variability of humidity and other thermodynamical variables over the subtropical Atlantic ocean, its relationship to the mesoscale organisation of clouds quantified using various metrics of organization (White et al. 2018), and its impact on the radiation budget. An important point is to determine if the mesoscale organisation of clouds is related to spatial variation in sea surface temperature and how horizontal variability of the low-level water vapour mixing ratio contributes to this organisation. Then, the postdoctoral fellow will set up a case to be run with Meso-NH (Lac et al 2018) in a Large-Eddy simulation mode based on the EUREC4A field campaign that will be used to dig into the mechanisms responsible for the mesoscale organisation of clouds and explored further the mecanisms inferred from the observations. This LES will also serve as a link between observations and the operational mesoscale model AROME that is run every day over the Carribean. Practical aspects: = = = = = = = = = At Meteo-France location, it is possible to get a room in a student residence for 160 € per month. Otherwise, access from the city centre is easy by Metro and Bus. Salary will depend on the previous experience, and may evolve along the contract, in agreement with legal and employer regulations, with a lower limit of 2000 € net pay per month. The post-doctoral contract will be a 18-month. It may start as soon as 1st December 2019, and preferably before 1st September 2020, but will remain open until the position is filled. Qualifications: = = = = = = = To be eligible, the candidates should have a Ph.D. in the field of Atmospheric physics, with skills in meteorological modelling. Knowledge of atmospheric turbulence, convective parameterizations will be welcome. The successful candidate will have to run Large Eddy Simulations, in a Linux environment (with help from members of the team). He/she will be expected to attend international conferences and to publish his/her results in international peer-reviewed journals. Applications: = = = == = = Candidates should submit, before 30 October 2019, by email, a cover letter with a statement of research activities and interests, a CV, as well as the contact information for two referees to: Fleur Couvreux, email@example.com Dominique Bouniol, firstname.lastname@example.org References: Bony, S., B. Stevens, F. Ament, S. Bigorre, P. Chazette, S. Crewell, J. Delanoë, K. Emanuel, D. Farrell, C. Flamant, S. Gross, L. Hirsch, J. Karstensen, B. Mayer, L. Nuijens, J. H. Ruppert, I. Sandu, P. Siebesma, S. Speich, F. Szczap, J. Totems, R. Vogel, M. Wendisch, and M. Wirth. EUREC4A: A Field Campaign to Elucidate the Couplings Between Clouds, Convection and Circulation. Surveys in Geophysics, 38:1529-1568 White B. A., Buchanan A. M., Birch C.E., Stier, P., Pearson K.J.: Quantifying the effects of horizontal grid length and parameterized convection on the degree of convective organization using a metric of the potential for convective interaction. J. Atmos. Sci, 2018, 75, 425-450 Lac C et al. 2018: Overview of the Meso-NH model version 5.4 and its applications, GMD, 11, 5, 1929-1969, doi://10.5194/gmd-11-1929-2018 ----- Météo-France ----- COUVREUX FLEUR DR/CNRM/GMME/TROPICS email@example.com Fixe : +33 561079633
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