Busan
The Pearson correlation coefficient of the annual average wind speed in Busan and year is –0.62, which has a distinct negative linear relationship. This means that year and annual average wind speed have a distinct relationship. The slope of the trendline of the annual average wind speed graph in Busan is -0.0264, which is a negative number. This means that annual average wind speed is decreasing over the years.
The Pearson correlation coefficient of the annual average find dust concentration in Busan and
year is –0.62, which has a distinct negative linear relationship. This means that year and annual average find dust concentration have a distinct relationship. The slope of the trendline of the annual average find dust concentration graph in Busan is –1.2969, which is a negative number. This means that annual average find dust concentration is decreasing over the years.
1. Wind Speed
The month with the largest slope is September, which is –0.06. The month with the smallest slope is November, which is –0.0171. In other words, it can be seen that the average wind speed decreased the most in July and decreased the least in December. However, most slopes are similar, so windspeed in Busan continued to decline similarly.
2. PM10
The month with the largest slope is March, which is –2.1186. The month with the smallest slope is May, which is –0.7386. In other words, it can be seen that the average find dust concentration decreased the most in March and decreased the least in May.