Steady State Response

Results of Hosaka et al. 1998 

East of Warm SST patch : moistening
West of Warm SST patch : drying

Agreement with the shallow water models ( G80, HG84):

East : Kelvin-like: OK, Low pressure : OK
West : Rossby-like: OK, High pressure: not OK

Why and How does the positive pressure area develops
to the West of the warm SST anomaly?