2010ネン シュンキ ト シュウキ ノ コウサ ゲンショウ

The advection and dispersion of Asian dust events from China to the Pacific Ocean around Japan in 2010 were investigated using the Multi-functional Transport Satellite (MTSAT) data. Aerosol Vapour Index images, taking the brightness temperature difference between 11 μm and 12 μm, were very effective for monitoring the Asian dust phenomenon in the East Asia region, with their capacity for detection during the day or night. The results were compared with suspended particulate matter concentrations measured at surface stations in Kyushu and with ground-based observations of sky in Kumamoto and Kagoshima. When a dense dust band was crossing over Japan, the rapid increase of SPM concentrations was observed at stations located in the dust path. The observed increase of SPM concentrations corresponded to the distribution of Asian dust shown in AVI images, the visibilities recorded by the Janan Meteorological Agency and the atmospheric turbidity shown in the ground-observation images