SPATIO-TEMPORAL HYPOTHESIS TESTING IN MODEL RESIDUALS

Spatio-temporal models add complexity, but not necessarily value, to some climate analyses. To con?rm the presence of spatio-temporal dependence, a hypothesis test should be conducted. The Space-Time Index is one statistic to detect such dependence; this statistic is simple, easily interpretable, and used in several disciplines. In an application to Indian monsoon precipitation thresholds, residuals from logit-normal mixed models were tested for spatio-temporal dependence. No evidence of dependence was detected in high thresholds.