In this paper presents first results of the monitoring study on ambient air quality in Ulaanbaatar and Erdenet cities of Mongolia. The work performed including sampling of particle concentration and elemental concentration valuable data. Determined for each of PM 10 and PM 2.5 sites air particulate. Research results show, that air dust concentration is mostly more than national standard level in all seasons. By this study determined that soil particles and white dust is dominant pollutant source in UB city and mining site of Erdenet.
This article discusses common features of photosynthetically active radiation (PAR) in the Mongolian grain farm region during the period of 1986 to 1996. The quantitative characteristics of solar radiation, such as direct, diffuse and global radiation are evaluated in the study through the long term trend. The mean pattern of seasonal variation of PAR shows that the yearly minimum global
Aerosol optical thickness is the most comprehensive variable to characterize aerosol, assess atmosphericpollution and make atmospheric corrections to satellite remotely sensed data from ground-based instruments. Scientists have much to learn about the way aerosols affect regional and global climate. Climate change studies in Mongolia -clearly demonstrate that Mongolians should be concerned about climate change resulting from anthropogenic greenhouse gas (GHG) emissions. These studies suggest that during the last 60 years the average temperature in Mongolia has increased by about 1.56°C. Photosynthetic active radiation (PAR) contributes significantly in comprehensive studies of radiation climate, remote sensing of vegetation, radiation regimes ofplant canopy andphotosynthesis.The PAR has been observed in Mongolian grassland for a long time. It is useful for not only vegetation but also atmospheric research, especially for aerosols, because of its major part of solar radiation. In this study, a method to estimate optical thickness of aerosol (AOT) has been developed with an error analysis and then the AOT has been derived from the PAR data in Mongolia during a period of1985 to 2000.There are two remarkable features shown in the analytical results; the AOT in 1992 is temporarily increasing possibly due to the effect of Pinatubo eruption (June 1991), and after 1997 the AOT is gradually increasing and has a clear seasonal trend compared before 1995.
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