Ⅰ. Background and Aims of Research
1. Background
o Reductions in (ultra)fine particulate matter (PM) have stagnated since the 2010s.
ㅇ Total air pollutant emissions have decreased steadily as a result of aggressive air quality management policy implementation since the 2000s.
ㅇ As the discharge amounts decreased, (ultra)fine PM concentrations also decreased, recording an all-time low in 2012.

o Recently, studies have attempted to identify the relationship between climate change and air pollution, but this has not been reflected in policy.
ㅇ Several previous studies have revealed that the recent trend toward declining PM concentrations is related to stagnation and a weakening of wind speed due to climate change.
ㅇ Since it has been pointed out that the existing PM management measures do not sufficiently consider linkages between PM, climate change, and energy policies, it is necessary to establish a mid- to long-term air management policy that can compensate for the limitations of current PM management measures (that do not consider weather and climate effects).

2. Research purpose and scope
o Analysis of the relationship between weather, climate and PM air quality
ㅇ Analysis of the relevance of mid- to long-term changes in meteorological factors and PM concentration by statistical analysis of observed data
ㅇAnalysis of meteorological contributions to annual average PM concentration through fixed-weather change modeling

o Preliminary study for predicting changes in PM air quality due to climate change
ㅇInvestigation of major climatic factors related to changes in PM conce