Page History

...

However, generally there is an improvement in forecast 2m temperatures.  But at times the analysed temperature structure of the boundary layer may only move a small way towards correcting errors in the background (Fig9.2.1-1).  From a mathematical standpoint it is also (unfortunately!) more difficult to correctly assimilate data near the surface than data higher up.

See also Section 2.1.4.5 Modelling soil structure.

Fig9.2.1-1: Examples of the difficulty of assimilating temperature and humidity data in the lowest layers.

...