Dear All

This is Dr. Suman from IIT Bombay, India. Recently, I was evaluating model performance using Index of Agreement (Mbienda et al., 2017). IOA is a skill metrics used for performance evaluation of model designed by Willmott et al., 1981 which is again redefined by Willmott et al., 2012 and used in Mbienda et al., 2017. I have the following question.

In general, statistical metrics used in meteorology may be calculated considering space as well as time (Example space/time correlation). While the same is true for IOA calculation? I mean while calculating, he summation will be taken considering space or time? In particular, during IOA calculation, there are two summation. Whether those summation will be calculated over all time period or all the spatial grid points?

Please reply at the earliest.

Best

Suman