Problem statement:\ Aerosol (i.e. particulate matter) size distributions in two regions (A and B) are given in the attached spreadsheet. Both distributions have 50 bins per decade. Assume that the particle density is

1000k(g)/(m^(3))

.\ Convert the number distributions into mass distributions (in units of

\\\\mu (g)/(m^(3))

) and plot both mass distributions, for

A

and

B

, on the same figure. Briefly list the steps and equations involved in the analysis. (

40pts

)\ Calculate the attributable fractions associated with

PM_(2.5)

in

A

and B. Briefly list the steps and equations involved in the analysis. (

25pts

)\ Briefly discuss the results in part 2, specifically focusing on the limitations of using the calculated attributable fractions in A and B for policy making. (10 pts)\ For region A, obtain a cumulative fraction distribution based on both number and mass, and show both distributions on the same figure. (15 pts)\ For region

A

, find the count median diameter (CMD) and mass median diameter (MMD). Briefly list the steps required in the analysis. Is the difference between CMD and MMD as expected? Briefly comment. (10 pts)\ Hint 1: You can upload the size distributions to MATLAB using the xlsread function.\ Hint 2: If your numbers look wacky, check your units!! Anita and I will not answer questions on unit conversion.

Problem statement: Aerosol (i.e. particulate matter) size distributions in two regions (A and B) are given in the attached spreadsheet. Both distributions have 50 bins per decade. Assume that the particle density is 1000kg/m3. 1. Convert the number distributions into mass distributions (in units of g/m3 ) and plot both mass distributions, for A and B, on the same figure. Briefly list the steps and equations involved in the analysis. ( 40pts ) 2. Calculate the attributable fractions associated with PM2.5 in A and B. Briefly list the steps and equations involved in the analysis. ( 25pts ) 3. Briefly discuss the results in part 2 , specifically focusing on the limitations of using the calculated attributable fractions in A and B for policy making. (10 pts) 4. For region A, obtain a cumulative fraction distribution based on both number and mass, and show both distributions on the same figure. (15 pts) 5. For region A, find the count median diameter (CMD) and mass median diameter (MMD). Briefly list the steps required in the analysis. Is the difference between CMD and MMD as expected? Briefly comment. (10 pts) Hint 1: You can upload the size distributions to MATLAB using the xlsread function. Hint 2: If your numbers look wacky, check your units!! Anita and I will not answer questions on unit conversion