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1. Brief  description of the problem:

Some coastal grid points may display unrealistic of Tmax . All of  the spurious Tmax points are flagged as being ocean points based on the atmosphere land-sea mask.

2. Recommendation:

To eliminate the spurious Tmax values the user can use Tmax  over land points based on POAMA's land sea maskwrong maximum values of surface_air_maximum_temperature_sfc at some points
@Frederic Vitart: The completely wrong max temperature from Australia in af ew coastal| grid points  is a know problem. I had an exchange of emails with the Australian about a year ago.  There is no quick fix since it is present in the re-forecasts and all the re-forecasts would need to be rerun. A possible solution was to mention in the Australian model documentation that tmax should be used only over land points (using ammc land-sea mask) since the problem happens only over sea points.