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November 2011
Message 26

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[Met-jobs] PhD in "Nonlinearity and midlatitude low-frequency variability", Stockholm University

From "Roger Brugge" <r.brugge@reading.ac.uk>
To "met-jobs@lists.rdg.ac.uk" <met-jobs@lists.reading.ac.uk>
Date Mon, 7 Nov 2011 15:23:36 +0000

PhD in "Nonlinearity and midlatitude low-frequency variability"

 Extratropical low-frequency variability is a topic of intensive research
in many climate
 research centres because of its importance in understanding and improving
predictability
 in weather and climate. The nature of this variability is a subject of
ongoing debate
 between two mainstream, namely linear vs nonlinear paradigms. Recent
research on the jet
 stream variability provides some evidence in support of the nonlinear
paradigm in which
 extratropical low-frequency variability can be explained by low-order
nonlinear
 dynamics. This entails, in particular, the existence of nonlinear
circulation regimes,
 i.e. recurrent and quasi-stationary states of the extratropical
large-scale flow. There
 is the possibility that these flow regimes may be associated with
different states of
 the midlatitude jet stream, which could provide a key explanation of
these circulation
 or weather regimes. This association can enhance the prediction of
weather regimes,
 weather regimes transitions and ultimately may improve weather and
climate predictability.

 A PhD student si sought to conduct research on this topic using simple
and complex
 mathematical models of the atmosphere. Concepts and methods from
dynamical system's
 theory and time series analysis will be used.

 Application:

 The successful applicant should have a MSc with an upper second class
honour degree
 or above in mathematics, statistics, physics or atmospheric science. The
candidate
 should show a keen interes in the application of mathematical/statistical
methods
 to problems in weather and climate. Some experience in Matlab/Fortran
programming is
 preferable.

For more information get in touch with Dr Abdel Hannachi
email:  a.hannachi@misu.su.se
or refer to the Department website: http://www.misu.su.se for more
information and application.



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