4.conclusions
The main results found that in this study may be summarized as follows.
In our analysis of rainfall over Thailand during the period 1971-2010 the most dominant mode, accounting for 21.6% of the total variance, had a spatial pattern with the same sign (positive) over almost all of Thailand.
Consequently,when the PC was positive there was more rainfall than normal and when the PC was negative there was less rainfall than normal almost everywhere.
An exception to this general result occurs in the south at latitudes below 9.