1. Predicting secondary aerosol formation from:
the amount of gas phase reaction of a given compound called DROG (reactive organic gas)
DROG --> Sai product Ci
DROG
Product Ci
concentration
Product Ci = Cgas i +Cpart i
time

2. Jay Odum, ES&T, vol 30, p2580, 1996, started with a Gas/Particle partitioning model and tried to estimate aerosol yields based DROG, the change in reactive organic conc.
Kp i = 760 RTx10-6 fom /{Mw gi PoLi}
Kp i / fom= Kom i
Kom i = Cpart /{Cgas fom xTSP}
Kom i = Cpart /{Cgas Mo} where
fom xTSP = Mo Mo is the organic aerosol mass conc in mg/m3
Historically researchers have thought in terms of aerosol yields, Y, from a given reactive hydrocarbon.

3. Y = DMo/ DROG 1 DMo= formed aerosol mass
Kom i = Cpart /{Cgas Mo} 2
a DROG= product Ci a = proportionally const
product Ci= Cpart i+ Cgas i 4
Yi DROG = Cpart i substituting product Ci in eq 4 into eq 3 and DROG from eq 3 into eq.5
Yi (Cpart i + Cgas i)/ai = Cpart I substituting Cpart i in eq 6 into eq 2
Kom i = Yi (Cpart i + Cgas i)/ { ai Cgas Mo} 8
ai Kom i = Yi(Cpart i + Cgas i) /{Cgas Mo} 9

4. ai Kom, i = Yi(Cpart i + Cgas i) /{Cgas Mo} 10
Kom, i = Cpart i /{Cgas i Mo} rearranging eq 10
ai Kom, i = Yi(Kom, i + 1/Mo} ) 11 solving for Yi
What if Mo is small or Kom is high?
for the entire aerosol yield
Odum found that just two terms could approximate aerosol forming in a smog chamber

5. Jay used pairs of Mo (measured aerosol) and Y (Yields) from his chamber aerosol experiments
How do we get yields??
He then numerically solved for a1,a2, Kom,1 and Kom,2 to fit his yield and measured aerosol data a- pinene- NOx experiments by Odum
Y Mo (mg/m3)