UM upgraded to version 7.4:
• Horizontal resolution upgraded to N216 (60km) from N144 (90km).
• Vertical resolution upgraded to 70 levels from 38 levels.
• SKEB2 upgraded with N216 tuning and velocity potential wind increments
• Bug fixed in wind gust diagnostic.
• CAPE and CIN formulations changed to bring into line with those of other Centres.
• Perturbations now formulated using vertical localisation to improve spread near the surface.
Implementation was f ... more
26-01-2010
ECMWF
The ECMWF model was upgraded to cycle 36r1 on 26 January 2010.
The main changes included in this cycle are:
• Deterministic forecast and analysis horizontal resolution is increased from T799 to T1279, i.e. from 25 km to 16 km.
• EPS resolutions are increased from T399/T255 to T639/T319 for Leg A/B
respectively. That is to say, the first 10 days of the EPS (Leg A) will run at T639 (32 km) and the extension beyond day 10 (Leg B) will run at T319 (63 km).
• Correction of sh ... more
06-10-2009
MetOffice
Implementation of E-suite 4. The model was upgraded to UM7.3
(released 26/3/09). The upgrade from UM6.3 represents 2 major and 5
minor releases of the model and brings the UK 15-day ensemble into line
with its parent system and deterministic forecast system. There are many
changes to the science schemes. RMS errors are improved in all areas
with particular benefit noted in the northern hemisphere in the forecast
range 6-12 days. The stochastic physics schemes SCV an ... more
08-09-2009
ECMWF
Introduction of cycle 35r3. Revised stochastic physics for EPS (improved probabilistic scores for temperature at 850 hPa in the tropics).
12-03-2009
MetOffice
Implementation of E-suite 3. The model was upgraded to UM6.3
(released as a portable version 23/7/08). The upgrade from UM6.1 was
primarily the implementation of the new configuration management system,
although code restructuring in several schemes such as radiation and
convection resulted in small improvements to RMS errors particularly in
the tropics.
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