BSISO
BSISO
Figure 1: Upper-tercile rainfall frequency for BSISO1 phases during MJJAS based on GPCP (reference period: 2001-2020);
For each BSISO1 phase, the upper tercile frequency is computed as the ratio of days with values exceeding the upper tercile threshold to the total number of days in that phase;
N corresponds to the number of days for each BSISO1 phase.
Figure 2: Correlation heatmap between BSISO1 amplitude and 20–90 days bandpass-filtered daily rainfall during MJJAS based on GPCP data (Reference period: 2001–2020); Only correlation significant at the 95% level is shown.
MC = Maritime Continent; MSA = Mainland Southeast Asia.
The qualitative outlook is assessed for the region in general. For specific updates on the national scale, the relevant ASEAN National Meteorological and Hydrological Services should be consulted.