Atmospheric concentrations of some radicals

OH and HO2: Heard, D. E., and M. J. Pilling, Measurement of OH and HO2 in the troposphere, Chem. Rev. 103, 5163–5198, 2003.

BrO: 3 pptv(Atmos. Chem. Phys., 8, 2985–2997, 2008, http://www.atmos-chem-phys.net/8/2985/2008/acp-8-2985-2008.pdf) + https://ps.uci.edu/~rowlandblake/publications/wingenteratomic.pdf

CH3C(O)OCH3: 0.5ppbv rain forest mesocosm (Phytogenic Biosynthesis and Emission of Methyl Acetate)

Cl atom: https://ps.uci.edu/~rowlandblake/publications/wingenteratomic.pdf

HCl: ambient [] ~ <= 1ppbv (http://projects-web.engr.colostate.edu/lpdl/research/hcl/hcl.html)

Conversion from ppb to ug/m3:
ug/m3 = ppb * molar mass (g/mol)/molar volume where molar volume (V) is given by ideal gas law, V=nRT/P
(https://www.markes.com/Resources/Frequently-asked-questions/How-do-I-convert-units.aspx)

Pilling’s lecture https://www.princeton.edu/cefrc/Files/2011%20Lecture%20Notes/Pilling/G-atmospheric-processes.pdf