|From||"Roger Brugge" <firstname.lastname@example.org>|
|Date||Thu, 6 Mar 2014 10:13:19 +0000|
Forwarded from CLIMLIST... Title: Regional modeling of cloud-aerosols interactions in southern West Africa The University Pierre et Marie Curie and the Institut Pierre-Simon Laplace offer a 2-year post-doctoral position to work on modeling of cloud-aerosols interactions at regional scale in Southern West Africa. The position is funded through the European FP7 project DACCIWA (Dynamics-Aerosol-Chemistry-Cloud Interactions in West Africa). Context: The main objectives of DACCIWA are a comprehensive assessment of the atmospheric composition of the region, impacts on human and ecosystem health, the two-way coupling between aerosols, clouds and precipitation, key meteorological processes, impacts on radiative forcing and the regional scale circulation, and socio-economic implications of changes in anthropogenic emissions, land use and climate. The DACCIWA project proposes a major field campaign in southern West Africa involving three European research aircrafts, two super-sites, new space observations and numerical models operating at different resolutions and levels of complexity in order to generate a benchmark dataset that comprises the full chain of processes from surface-based emissions to climate impacts. West Africa is ideal for such a study due to its rich mix of aerosols and clouds, its rapid population and economic growth, and its strong dependence on the notoriously difficult to predict West African monsoon. Description of work: The first objective of the work to be conducted is to evaluate the capability of the CHIMERE <#_ftn1>model to reproduce the complex summertime chemical landscape in the Southern West Africa, between the Gulf of Guinea and ~12°N, from the background state over the Gulf of Guinea (marine aerosols or mix between marine aerosols and biomass burning aerosols from Central Africa) to the coastal strip of polluted cities/megacities (Abdijan-Accra-Lome-Cotonou-Lagos) to the agricultural areas further north to the forest areas. Dust aerosols transported from the Sahel or remote Sahara are also expected to contribute to the overall complexity of the chemical panorama. Modelled emissions (marine – anthropogenic- soil – biogenic - dust) and concentration fields will be evaluated against airborne measurements made during the three-week aircraft campaign in Africa in June/July 2015. A second objective of the work will be dedicated the validation of modeledcloud condensation nuclei (CCN) properties (concentration, size-distribution, etc…) in southern West Africa as a function of pollution and meteorological conditions, using the airborne data. A third objective will be to analyze of the retroactions between anthropogenic, biomass burning and mineral dust aerosols and the life cycle of clouds in the Gulf of Guinea region, from nocturnal stratus to low Sc clouds to the formation of congestus Cu clouds in the afternoon. The candidate will run simulations with both the WRF and CHIMERE models. He/she also will contribute to the development of the CHIMERE model through the improvement of the on-line coupling techniques currently designed in the CHIMERE team. Supervision team:The work will be conducted under the main supervision of Laurent Menut from LMD <#_ftn2> and Cyrille Flamant from LATMOS <#_ftn3>. The work will be performed in Laboratoire de Météorologie Dynamique (LMD), Ecole Polytechnique, 91128 Palaiseau Cedex – France Experience: The applicant should have a PhD in environmental sciences or similar experience.He/she will have experience with numerical modeling of the Earth system based on global or regional model. He/she also have experience with handling large datasets. Knowledge in computer programming (Shell, Unix, Fortran, awk) is highly desirable. The applicant publication record should show a majority of papers published in English in top ranking journals. Duration and salary: The post-doctorate will be recruited for 24 months with a net monthly salaryaround 2000 euros, commensurate with experience. This includes social services and healthinsurance. Contact for applications:Applications should include a CV (with a list of peer-reviewed publications), a statement of research interestsand the names of at least two references including e-mail addresses and telephone numbers. Applications should be submitted by e-mail to Cyrille Flamant (email@example.com <mailto:firstname.lastname@example.org>) and Laurent Menut (email@example.com <mailto:firstname.lastname@example.org>) before 31 March 2014. ------------------------------------------------------------------------  <#_ftnref1>Menut L, B. Bessagnet, D. Khvorostyanov, M. Beekmann, N. Blond, A. Colette, I. Coll, G. Curci, G. Foret, A. Hodzic, S. Mailler, F. Meleux, J.L. Monge, I. Pison, G. Siour, S. Turquety, M. Valari, R. Vautard and M.G. Vivanco, 2013, CHIMERE 2013: a model for regional atmospheric composition modelling, Geoscientific Model Development, 6, 981-1028, doi:10.5194/gmd-6-981-2013. http://www.geosci-model-dev.net/6/981/2013/gmd-6-981-2013.html  <#_ftnref2>Laboratoire de Météorologie Dynamique( http://www.lmd.jussieu.fr/)  <#_ftnref3>Laboratoire Atmosphères, Milieux, Observations Spatiales(http://www.latmos.ipsl.fr/)
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