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Proceedings - C-SRNWP Project

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Unified Model Developments 2006<br />

Met Office Fitzroy Road Exeter<br />

+44 1392 886098 mike.bush@metoffice.gov.uk<br />

Configurations<br />

The current NWP model configurations are shown in figure 1<br />

Figure 1: Current NWP model configurations.<br />

Global Model developments<br />

Cycle Date Model change and impact<br />

G38 13 Dec 2005 Resolution change: N320L50 replaces N216L38<br />

Most extra levels in stratosphere<br />

‘Lid’ raised from 39km to 63km<br />

Replace stratospheric model<br />

Extra levels make better use of satellite obs<br />

Better capture of extremes<br />

Improve orographic interactions<br />

Increased EKE and deeper tropical cyclones<br />

G39 14 Mar 2006 Physics package: Boundary layer and convection<br />

changes to improve known model errors in the tropics<br />

G40 14 Jun 2006 Data assimilation upgrade<br />

Improved soil moisture nudging<br />

G41 26 Sep 2006 Satellite changes: SSMIS and GPS RO<br />

51

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