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: From 19 May 2021 onward, the products in this page are based on the new climatological normal (1991-2020 average) unless otherwise stated.
Notice: OLR-related products updated from October 2023 onward are based on NOAA CPC Blended OLR (CBO).
