This page shows calculated footprints of 10-day backward trajectories when 10,000 Lagrangian particles are released from Hateruma and Cape Ochiishi, which are two of the global environment monitoring stations of the Center for Global Environmental Research (CGER), Earth System Division (ESD), National Institute for Environmental Studies (NIES).

For more information about the trajectory model, please refer to here.

Calculation period	Hateruma: 1990年01月01日 - 2020年08月31日 Cape Ochiishi: 2005年12月31日 - 2013年01月01日 Calculations using the latest meteorological data are available in the "Calculation". *User registration is required.
Start location of calculation	Hateruma (Latitude: 24.0608N, Longitude: 123.8093E) Cape Ochiishi (Latitude: 43.1602N, Longitude: 145.4973E)
Trajectory length	10 days
Trajectory model	3D-wind (kinematic) model
Time integration direction	Backward
Calculation parameter	Mean residence time of Lagrangian particles in 1°×1° grid cells at each of the following altitudes All heights From surface to 500m From surface to PBL (planetary boundary layer altitude)