translate English to French: Defining n2 as the number of cases where the analysis (climatology) showed snow cover and SSM/I did not, n3 as the number of cases where SSM/I showed snow cover and the analysis (climatology) did not, and n4 as the number of cases where both SSM/I and the analysis (climatology) showed snow cover, then the probability of detection (POD) is n4/(n3+n4) and the false alarm ratio (FAR) is n2/(n2+n4).
Les résultats mensuels sont des moyennes pour l’hémisphère Nord.