Proceedings - C-SRNWP Project

Tropospheric chemistry in the Unified Model
Work is in progress on a pilot project to implement a chemistry package in the operational
global and regional versions of the UM.
The chemistry model is the UKCA: UK Chemistry Aerosol Community Model
http://www.ukca.ac.uk/ and there are close links with the GEMS EU project.
Figure 16: Schematic of how the chemistry model fits into the UM (top). 8 th -10 th August
2003 case study: Time series of observed carbon monoxide (solid blue circles) for London
and 48 hour forecasts from the Global (red squares and left middle plot) and Mesoscale
models (blue diamonds and right middle plot).
220