Incheon
The Pearson correlation coefficient of the annual average find dust concentration in Incheon and year is –0.63, 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 Incheon is –0.6902, which is a negative number. This means that annual average find dust concentration is decreasing over the years.
The Pearson correlation coefficient of the annual average wind speed in Incheon and year is 0.56, which has a distinct positive 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 Incheon is 0.0238, which is a positive number. This means that annual average wind speed is increasing over the years.
1. Wind Speed
In all other months except March and April, the slope of the trendline is positive. The month with the largest slope is September, which is 0.0742, and the month with the smallest slope is February, which is 0.0005. The coefficient of determination (R^2) in February is 0.00009, which is very small compared to other months. In other words, it can be seen that the average wind speed increased the most in September, and the average wind speed in February was fluctuating.
2. PM10
The month with the largest slope is April, which is –1.1635. The month with the smallest slope is February, which is –0.1283. But, the coefficient of determination (R^2) in February is 0.0046, which is very small compared to other months. In other words, it can be seen that the average find dust concentration decreased the most in April and decreased the least in February. In addition the average find dust concentration in February was fluctuating.