Please note that the NWP SAF helpdesk will be closed from 24th December. The helpdesk will re-open on Monday 5th January.
All deliverable requests and helpdesk enquiries will be attended to soon after the Helpdesk re-opens.
Thank you for your patience. Merry Christmas and happy new year!
The main aim of the NWP SAF AMV (atmospheric motion vector) monitoring site
is to improve our understanding of AMV error characteristics in order to
enable improvements to the AMV derivation and their treatment in NWP models.
This is achieved by:
- Providing a 3-year rolling archive of O-B monthly monitoring plots displaying
differences between AMVs (O) and NWP model background winds (B) valid at the same
location and time (see Monthly Monitoring tab). Plots are provided for the Met Office and ECMWF in the same format
to enable easy comparisons. Both the AMVs and the model
forecast contribute to the differences observed in the plots.
Differences between centres suggest model-dependent problems
whereas similarities suggest either problems with the AMVs or problems shared by the
- Producing analysis reports every 2 years to coincide with the
International Winds Workshops (see Analysis Reports tab).
These are detailed studies reviewing (i) the quality of new datasets and (ii) features
observed in the O-B monitoring. Details are included of possible causes of the O-B features and, where relevant, actions
that may help to alleviate the problems.
- Carrying out some bespoke investigations e.g. to investigate diurnal error characteristics (see Investigations tab).
There are two additional aims of the site:
- To provide background information on how AMVs are used in NWP (see NWP tab). As part of this the site hosts
information on how AMVs are assimilated at different NWP centres.
- To provide links for those interested in near real-time monitoring issues (see Real-time Monitoring tab).
Please use the NWP
SAF Feedback Form if you have comments or suggestions about this
product, or if you would like your NWP centre to contribute to future
The AMV monitoring report is issued under the
auspices of the NWP SAF, a EUMETSAT-funded project that exists
to coordinate research and development efforts among the
SAF partners to improve the interface between satellite data
and NWP for the benefit of EUMETSAT member states. The host
centre for the NWP SAF is the Met Office, and its partners
are ECMWF, KNMI and Météo-France.