Evaluation of hybrid model (UM10.2 version of hybrid)

There are two main conclusions to Colin Jones's evaluation for HCCP report

1. Hybrid (N216<->N96) produces simulation quality very close to the hi-resolution model (N216)

   Absolute annual mean TOA Outgoing Longwave Radiation (left column) and bias in TOA OLR against CERES observations (right column)

   
   
   
2. Little difference between N216 and N96 for aerosol and chemistry

   DJF means of Aerosol Optical depth

   N216	N96
   Snr A lot of chemistry and aerosol is missing from Snr	Jnr

Colin Johnson has looked at tracer transport for N216 vs N96

• He's worried that the expense of N216 chemistry means that it's never properly been evaluated
• He's looked at tracer transport by releasing a tracer at day zero evenly at the surface and seeing where it spreads to by day 90.

  N216

  N96