PM1 Number Concentration Explains Traffic Pollution Better
Talking with Dr. Kinney, she mentioned that we don't see the changes in PM2.5 we expect, because the major player in traffic-related PM is PM1.
The Problem
The diameter of a PM1 particle is only ~2 times smaller than a PM2.5 particle, but the difference in mass is at least 8 times smaller. Perhaps this is why we don't see differences on campus.
The Solution
Purple Airs do have a measurement for NUMBER of particles of 0.3 and 1 micro-meters in diameter so let's look at these values instead of MASS concentration of PM2.5 or even PM1.
[x] gather data from Purple Airs for number concentrations 0.3 and 1
[x] plot the time series of number concentrations from the beginning of the year to now
PM1 Number Concentration Explains Traffic Pollution Better
Talking with Dr. Kinney, she mentioned that we don't see the changes in PM2.5 we expect, because the major player in traffic-related PM is PM1.
The Problem
The diameter of a PM1 particle is only ~2 times smaller than a PM2.5 particle, but the difference in mass is at least 8 times smaller. Perhaps this is why we don't see differences on campus.
The Solution
Purple Airs do have a measurement for NUMBER of particles of 0.3 and 1 micro-meters in diameter so let's look at these values instead of MASS concentration of PM2.5 or even PM1.