June 2019
Message 99

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[Met-jobs] Post-doctoral position in atmospheric processes at CNRM (France): mesoscale organization of shallow clouds within the trade winds

From COUVREUX Fleur <>
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 
Contact: Fleur couvreux (CNRM,; Dominique Bouniol 
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
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= = = = == 
        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 
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.

= = = = = =  = 
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 

= = = == =  =
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,
Dominique Bouniol,

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

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