Kyoto University · Earth and Planetary Sciences
Professor Yoshizumi Kajii's research lab specializes in atmospheric chemistry and environmental monitoring, focusing on the impacts of biomass burning and industrial emissions on air quality and atmospheric composition. The lab conducts satellite remote sensing analysis to estimate fire-induced emissions of ozone precursors, particularly in boreal and high-latitude regions such as Siberia and northern Mongolia. Ground-based measurements at stations like Happo are used to study long-term trends and seasonal variations in tropospheric ozone and carbon monoxide, providing insights into photochemical pollution processes. The lab integrates satellite and ground-based data to understand the role of wildfires and anthropogenic sources in regional and global atmospheric chemistry.
Figures are computed from collected data and may differ slightly.
The NOAA 12 advanced very high resolution radiometer detected extensive forest fires in boreal Siberia and northern Mongolia during April through October 1998, a year of extremely dry weather, in particular, in the Russian Far East. Analysis of the satellite data has been carried out to estimate the area burned and gaseous emissions to the atmosphere from the point of view of ozone precursors. The fires started in western and eastern Siberia and moved eastward during the summer, until they were
Ground based measurements of ozone as well as carbon monoxide have been carried out at Happo station. Annual cycles of ozone and CO concentration were obtained. Monthly means of ozone show maximum of ca. 65 ppbv in April or May and minimum of ca. 45 ppbv in December or January. The annual behaviour of CO is somewhat similar to that of ozone showing maximum of 225 ppbv in April and minimum of 151 ppbv in December. A positive correlation was obtained between ozone and CO during spring and summer.
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