Temperature Inversions

[Knightsky]

Would be most appreciative if those with knowledge in this area could comment on the following;

1. When operating to parts of the world where temperature inversions pose a take-off performance problem where do you ascertain the inversion values? Are they available from local ATC/MET service?

2. Are there global locations, other than the middle east, where airlines take account of temperature inversions?

3. Do those of you operating out of the middle east account for the inversion value to reduce purely the climb limit weight or both the climb limit weight and the obstacle limit weight?

4.Do operators mandate lower MAAs under inversion conditions specifically to mitigate against performance limitations?

5. Do operators use a threshold value for the inversion temperature below which its' affects are not considered? IATA seems to quote 10 degrees Celsius but do more conservative inversions get considered?

Any other general comments as to your operating practices with regard to temperature inversions greatly appreciated.

Thanks,

Knightsky