SPATIO-TEMPORAL VARIABILITY OF AMBIENT TRACE GAS POLLUTANTS AND THEIR PCA PREDICATION: A
COMPREHENSIVE REVIEW
This review work is intended to serve as an in-depth analysis of national and international spatial and temporal variation of ambient air pollutants patterns like SO2, NO2 and diurnal variation of surface O3 and CO are taken into consideration. The gaseous pollutants vary from city to city. As the local people’s life style influences a lot in their emission. It is found that in most of the city SO2 is under permissible level, Whereas NO2 is somewhere seen to have high concentration as well as somewhere low concentration. Vehicle emission is the main source of NO2. Similarly, CO pollution is also dependent on vehicle emission. The secondary pollutant surface O3 are found in different parts of India and abroad. It is found that in most of the places it has not exceeded its prescribed standard limits, but its formation is not only dependent on its precursors but also on the prevailing meteorological condition. For validation of the result and for predicting and identifying the major source Factor analysis and PCA have also been used. A few mentionable research works on monitoring of the trace gas pollutant in the ambient air are as follows.
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