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[B-12.4 Effects of Global Warming on Urban Atmosphere]

[Contact Person]

Satio Ohta and Naoto Nurao
Faculty of Engineering, Hokkaido University
North 13, West 8, Sapporo 060, JAPAN
Phone +81-11-716-2111(Ext.6832), FAX +81-11-707-9750

[Total Budget for FY1990-1992]

9,387,000 Yen

[Abstract]

　Concentration of tropospheric ozone will increase due to global warming. We observed concentrations of ozone, PAN(peroxyacetyl nitrate) and nitric acid in Sapporo, and made sensitivity analysis based on the measurement. We found that urban air quality depends on the concentration of PAN and ozone in rural area in addition to pollutant emission in urban area. We developped photochemical reaction model and two dimensional transport model. With the model calculation we studied the urban air quality, and the variation of ozone and PAN in the mid latitudes in the Northern hemisphere.

[Key Words]

Urban air quality, PAN, Tropospheric ozone, Phtochmical reaction model, Two dimensional transport model