初夏期の富士山頂において観測されたエアロゾルの光吸収特性 [in Japanese] Light Absorption Characteristics of Atmospheric Aerosols Observed at the Summit of Mt. Fuji in Early Summer [in Japanese]
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Spectral dependence of aerosol light absorption was measured on the summit of Mt. Fuji (3,776 m msl.) during the summer of 2005. Black carbon (BC) concentration showed diurnal variation with typical pattern of maximum occurring in daytime and minimum in early morning, suggesting the thermally induced transport from the planetary boundary layer (PBL) . The absorption coefficients of aerosols at each wavelength relative to the value of 520 nm showed slopes of about -0.9 against wavelength in log-log plot when the maximum concentrations occurred, which has been reported to be typical for the urban/industrial originated BC. When minimum concentrations of BC occurred, two types of slopes, one with the same slope of maximum concentration cases and the other with much steeper (∼-1.5) slope, were distinguished. The former can be regarded as diluted urban/industrial aerosols originated in the PBL, whereas the latter exhibited the characteristic of soil dust or biomass burning aerosols which are candidates of free-tropospheric aerosols in the Asian-Pacific rim region.
- Earozoru Kenkyu
Earozoru Kenkyu 22(4), 318-321, 2007-12-20
Japan Association of Aerosol Science and Technology