|From||chiriaco marjolaine <firstname.lastname@example.org>|
|Toemail@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org|
|Date||Tue, 28 Jan 2020 10:13:59 +0100|
A 24-month Research
is open at LATMOS (Guyancourt, France) to
work on Multiple
lidar data analysis (UV /Visible) in the framework the future ACCP
mission from NASA and CNES
Research Engineer position: Multiple lidar data analysis (UV /Visible) in the framework the future ACCP mission from NASA and CNES
Start date: March or April 2020
Duration: 24 months
Net salary: according to CNRS standards for a Research engineer position (1946 to 2513 euros per month) depending on the experience of the candidate
Institution: LATMOS/IPSL at Gyancourt (Paris suburbs), France
The ACCP (Aerosol Cloud Convection Precipitation) spatial mission, currently in Phase A at CNES and in Pre-formulation study phase at NASA, aims to put into orbit instruments dedicated to the study of aerosols, clouds, convection and rainfall. Lidar is a key instrument in this project. The scientific objectives of ACCP lidar are 1) to quantify cloud feedbacks, responsible for large uncertainties in predicting future climate and 2) to identify the distribution and speciation of aerosols with fine vertical resolution. To do this, we are studying a lidar based on technical capabilities never seen on a space lidar, such as high spectral resolution (HSRL) in the visible range and the presence of three wavelengths (355, 532 and 1064nm).
In order to prepare the scientific exploitation of these measurements, it is necessary to have a database of lidar measurements at 355nm and 532nm, including the HSRL for some. Having these measurements available will allow us to study and understand the variations of lidar signals under various instrumental and atmospheric conditions, to identify approaches to scientific exploitation of data, and to develop algorithms for retrieving geophysical variables. This work will have repercussions on the EARTHCARE and AEOLUS missions which have UV HSRL lidar measurements. Today, the instruments making it possible to obtain this type of measurement are rare, their measurements are dispersed and offered in heterogeneous formats. The main instruments identified are the IPRAL lidar (SIRTA ground site), the LNG airborne lidar (LATMOS), a combination of CALIPSO (532nm) and ADM-Aeolus (355nm) space lidars. This list is not final.
The recruited person will have the following responsibilities, in collaboration with the scientists ACCP scientists and those responsible for the instruments identified:
- Set up with the managers of the various targeted lidar instruments protocols for accessing their data
- Recover low-level data (e.g. attenuated backscatter coefficients, extinction coefficients) of the target lidar instruments
- Restructure all data in a homogeneous, self-documented format and write the associated documents
- Organize and make available the data on the ESPRI data and calculation service of IPSL
- Provide user support: answer questions about the data and serve as an interface between the mission group and instrument managers
- For each dataset, perform various statistical tests to assess the quality of the measurements, their distribution and their temporal evolution
- Produce analyzes and explorations of the data sets at the request of the mission group's scientists
These activities will be carried out in cooperation with the heads of the ESPRI service of the IPSL and of the AERIS national center.
Required Skills :
- Hold a PHD in a field related to atmospheric sciences
- Good practice of oral and written English
- Knowledge required in the following areas:
o Measures for the physics of the atmosphere
o Remote sensing, lidar
o Data analysis
- Linux computing environment
- Good knowledge of Python language and its scientific environment (numpy, matplotlib, xarray)
- Practice of scripting language (shell script type)
The person in post will be based at LATMOS (Guyancourt site) and will be required to travel regularly to the Laboratory of Dynamic Meteorology (Polytechnic School site). Regular missions will be carried out at the Aerology laboratory in Toulouse.
How to apply
-- Marjolaine Chiriaco Maîtresse de Conférences/Associate Professor http://chiriaco.page.latmos.ipsl.fr/ email@example.com LATMOS Bureau 1141 11 bd d'Alembert 78280 Guyancourt tel : 33.(0)184.108.40.206.49 --
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