中文说明：该模型主要适用于教育用途。大约需要40秒（英特尔酷睿，2GHz）在Windows XP上运行。可以得到更多的信息通量的足迹。在四个不同的位置（蓝色，红色，黄色和绿色），在个不同的位置，以使他们的常规释放1000个粒子，让他们分散/扩散，因为它们被运输的水平风。该脚本可用于选择图中的区域，并计算出蓝色、红色、黄色和绿色颗粒的相对分布。
English Description：
The model is mostly suitable for educational purposes. Takes about 40 s to run on Windows XP (Intel Duo Core, 2GHz). More information on flux footprints can be obtained. The routine releases 1000 particles at four different locations (blue, red, yellow and green) along the x axis and lets them disperse / diffuse as they are transported by the horizontal wind. This script can be used to select an area on the plot and calculate the relative distribution of blue, red, yellow and green particles.