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September 2012
Message 70

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[Met-jobs] PhD Position at the German Aerospace Center, DLR, Oberpfaffenhofen

From "Meerkoetter, Ralf" <ralf.meerkoetter@dlr.de>
To <met-jobs@lists.reading.ac.uk>
Date Thu, 27 Sep 2012 13:52:04 +0200

The Institute of Atmospheric Physics of the German Aerospace Center, DLR, Oberpaffenhofen, Germany, invites applications to an open 3 years PhD position with the theme:

The life cycle of cirrus clouds from measurements of the satellites
Meteosat and EarthCARE

Your mission

Cirrus clouds play an important role for climate since they affect the
Earth's radiation budget. The physical processes that govern their life
cycle are still poorly understood, as is their representation in climate
models. This work aims to improve the knowledge about the temporal
evolution of cirrus clouds by retrieving and analyzing cirrus cloud
properties from a combination of active and passive sensors aboard polar
orbiting and geostationary satellites.

The Spinning Enhanced Visible and Infrared Imager SEVIRI aboard the
geostationary Meteosat Second Generation satellites, with its 12
spectral channels and its high temporal resolution of 15 min, enables
the investigation of the life cycle of cirrus clouds. However, in order
to infer the vertical structure of clouds, this data must be
complemented with measurements from active sensors like those of the
upcoming ESA EarthCARE mission scheduled for 2015. In preparation for
the exploitation of EarthCARE, data from the current A-Train are
available which comprises a similar suite of instruments.

The successful candidate shall extend our SEVIRI retrievals of ice cloud
altitude and ice cloud optical thickness to the determination of ice
water path, ice crystal effective particle radius as well as outgoing
longwave and reflected shortwave radiation. The temporal evolution of
the physical and optical properties derived from SEVIRI for selected
cirrus cloud classes shall be investigated in conjunction with the
A-Train products in order to understand the physical processes that
govern their life cycle. Further insight into cirrus life cycle
processes may be gained by a comparative analysis of additional
satellite measurements and numerical model simulations of cirrus cloud
evolution.

Your Qualification

- Good knowledge and experience in the area of satellite remote sensing and/or atmospheric radiative transfer
- Masters/diploma in physics or meteorology
- Fluent in spoken and written English
- Computer skills: LINUX, UNIX, MS-Office, at least familiar with one of the high level computer languages usually employed in natural science.
- Ability to communicate and to work in a team

Your benefits:

Look forward to a fulfilling job with an employer who appreciates your
commitment and supports your personal and professional development.
Disabled applicants with equivalent qualifications will be given
preferential treatment.

Start: immediately,  Duration: limited to 3 years, Salary: in accordance
to tariff part TvöD 13 (50%), Level of employment: full-time, DLR-Site:
Oberpfaffenhofen, Institute of Atmospheric Physics

Applications including all relevant documents should be sent to:


 Dr. Ralf Meerkötter

 DLR-Institut für Physik der Atmosphäre,
 Oberpfaffenhofen,
 D-82234 Wessling, Germany

 Tel: +49-8153-28-2535
 Fax: +49-8153-28-1841
 email: ralf.meerkoetter@dlr.de
 http://www.dlr.de/ipa/





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