Climate Information Service
Welcome to the Boreal Summer Intraseasonal Oscillation (BSISO) monitoring website. The BSISO, one of the dominant phenomena over the Asian summer monsoon region, is characterized by northward/northeastward propagation over the Indian summer monsoon region and northward/northwestward propagation over the Western North Pacific-East Asian region, including equatorial eastward propagation. This monitoring information is available from May to October.
Text file of Normalized Time Series for the BSISO1 and BSISO2 index
BSISO Phase Diagram
Reconstruction field(Mode 1-4)
Reconstruction field(Mode 1,2 & 3,4)