Climate System Monitoring / TCC HOME > Climate System Monitoring Climate System Monitoring JMA monitors the climate system focusing on atmospheric circulation, tropical convection, oceanographic conditions and snow cover to understand backgrounds and factors of the present climate conditions including extreme events. Notice: Products based on JRA-3Q were updated to those with improved quality in terms of tropical cyclone analysis. OLR-related products from January 1991 are based on NOAA CPC Blended OLR (CBO). Main Products Report on Climate System Reports on Specific Events Monthly Highlights on the Climate System () Seasonal Highlights on the Climate System () Monitoring and Statistical Analysis (Explanation) Analysis Charts and Monitoring Indices Asian monsoon monitoring Madden-Julian Oscillation (MJO) Stratospheric circulation Composite map for El Niño / La Niña and Indian Ocean Dipole events page top