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November 2016
Message 97

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[Met-jobs] Model Evaluation Scientist: Mid-latitude synoptic systems

From "Williams, Keith" <keith.williams@metoffice.gov.uk>
To "'met-jobs@lists.reading.ac.uk'" <met-jobs@lists.reading.ac.uk>
Date Thu, 24 Nov 2016 08:31:45 +0000

Met Office vacancy

Model Evaluation Scientist: Mid-latitude synoptic systems

 

Location: Exeter HQ

Contract type: Permanent

Closing date: 21-12-2016

Apply at: http://careers.metoffice.gov.uk/current-vacancies

 

 

Background

 

The mid-latitude climate is characterised by synoptic weather systems and their variability. Extremes often result from a particular dynamical regime being present for a sustained period (e.g. blocking, stationary jet, etc.). It is essential for the accuracy of mid-latitude (incl. UK) forecasts, seasonal and decadal predictions, and the fidelity of climate change projections, that these regimes and the processes leading to changes in the regimes are accurately simulated in general circulation models (GCMs).

 

The successful applicant will develop and use a variety of diagnostic tools such as feature tracking, nudging and PV-tracing to evaluate the ability of the Met Office Unified Model (UM) to simulate the primary modes of mid-latitude synoptic variability and the processes associated with the development and decay of these systems.

 

The post sits within the Global Model Evaluation and Development team which is responsible for the development of the global UM across timescales. The job holder will determine the timescales on which identified systematic model errors arise and undertake detailed analysis and sensitivity experiments to investigate the cause of the errors. He/She, will work with developers of the model dynamics and parametrization schemes to address the issues and fix the model errors.

 

 

Job Purpose

 

Exploit the seamless nature of the Unified Model across space and timescales to assess and improve the simulation of processes associated with mid-latitude synoptic regimes within the model.

 

 

Job Responsibilities

 

·         Evaluate the ability of new model configurations to simulate mid-latitude synoptic variability (intensity, track and speed of depressions; blocking frequency and duration; jet positions; NAO variability, etc).

·         Evaluate whether the model can accurately simulate the processes affecting the development and decay of these systems. E.g. Use PV-tracer diagnostics to investigate the role of diabatic processes and identify model deficiencies; E-vector analysis; evaluate teleconnections into the mid-latitudes, etc.

·         Identify the timescale on which model errors develop and use techniques such as nudging experiments, initial tendency analysis and comparisons with observational data (e.g. from the NAWDEX field campaign) to determine the processes which may be responsible.

·         Work with scientists in the parametrization and dynamics development teams, running sensitivity experiments, etc., to address the issues identified in the model.

·         Actively contribute to the Storm Tracks and Blocking Process Evaluation Group (PEG), especially linking results to related work being undertaken at the University of Reading, University of Oxford and other Met Office teams who are investigating mid-latitude predictability (e.g. Climate Dynamics team; NWP verification team).

·         Act as the code owner, and work to develop, a number of relevant pieces of diagnostic software (e.g. mid-latitude variability section of Auto-assess).

 

 



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