The above chart depicts analysis-based and predicted distribution of surface concentration at the 0 - 1 km level and total amounts in the atmosphere for 0.5-degree latitude and longitude grids. The outer frame is light purple in analysis-based charts and maroon in prediction charts. Surface concentration and total amounts can be selected via the pulldown menu. The regions of Japan (20 - 50° N, 110 - 150° E) and Asia (20 - 50° N, 80 - 150° E) can be specified using the pulldown menu, with Japan as the default setting. The chart is updated every morning at around 6 a.m. (JST).
Small amounts of Aeolian dust may be observed outside colored areas.
Topographic expression is based on ETOPO1 (elevation and depth data for 1-minute latitude and longitude grids) created by the National Centers for Environmental Information, NESDIS, NOAA, and the U.S. Department of Commerce.
The figures on this page were created using Generic Mapping Tools open-source software (GMT; Wessel et al., Generic Mapping Tools: Improved Version Released, EOS Trans. AGU, 94(45), 409-410, 2013. doi:10.1002/2013EO450001)
Japan Meteorological Agency, 1-3-4 Otemachi, Chiyoda-ku, Tokyo 100-8122, Japan