All figures of today's circulation and each monsoon indices are based on Grid Pont Value (GPV) data from Japan Meteorological Agency (JMA). Please refer to this site in WMO Distributed Data Bases (DDBs) sever by JMA about its detail. All figures except for seasonal/monthly mean monsoon index are usually renewed at 01:00 (UTC) everyday. These up-to-date figures show the circulation map in the yesterday's 12:00(UTC), as indicated by %y4%m2%d2%h2 on top of each figures.
All of daily, monthly and seasonal mean monsoon indices for the period 1948-2011 made by using NCEP/NCAR Reanalysis Data provided by the NOAA/CDC.
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By Yoshiyuki Kajikawa and Bin Wang
Last updated: 06/28/2012 ( except for daily updated Figures )