Monday 13 Oct 2014Regional Reanalysis at the Met Office (POSTPONED)

Prof Dale Barker - Met Office

Harrison 103 15:00-16:00

As part of the EURO4M project (European Reanalysis and Observations For
Monitoring: 2010 - 2014), the Met Office has developed an atmospheric regional
reanalysis capability in order to study the local variability of weather/climate
at resolutions not permitted by the current generation of global reanalyses.
The 12km UM-based regional reanalysis system is nested within the ECMWF's
~80km ERA global reanalysis, and assimilates observations from the ERA database.
Data assimilation of both conventional and a wide range of satellite data is performed
using the four-dimensional variational (4DVAR) approach. In the pilot EURO4M
project (2010-2014), a European area reanalysis has been run for an initial 2-year
period (2008-2009) and validated against independent observations and other
reanalysis datasets. This talk will provide an overview of the system as well as
results from initial evaluation efforts. The extension of the reanalysis period to the
full satellite-era (1978-present) together with the introduction of reanalysis
uncertainty estimates via ensemble DA will be undertaken in the new UERRA
(Uncertainty Estimation for Regional ReAnalyses: 2014- 2018) project. Future
plans for UERRA and other regional reanalyses (e.g. for the Indian Monsoon)
will be presented.

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