O

03, see Ozone OCIO

absorption spectrum, 115, 118 photochemistry, 115 Oceans, and climate change, 822-828 Octanol-air partioning coefficients, 420-422 OH, see Hydroxyl radical Oil well plumes, particles from burning of, 393

Olefins, see Alkenes

Optical counters, in particle size measurement, 614

Optical microscopy for particle measurements, 614-616 Order, reaction, 131

Organic acids in acid deposition, 326-327 in aerosol particles, 393-409 concentrations, typical in troposphere, 326 measurement methods for, 594 Organic compounds acronyms, 18-19

concentrations in troposphere, 589, 591-595

emissions of, discrepancies in, 899-907 as film on particles, 407-410 gas-particle distribution of, 412-423 incremental reactivity, 910 maximum incremental reactivity, 910-913 measurement methods for, 585-595 nitrogen-containing, reactions in troposphere, 217-225 oxygen-containing, reactions in troposphere, 213-217 photochemical ozone creation potential

(POCP), 913 reactivity adjustment factors, 911-913 reactivity scales, 907-913 sources, 18-20 tropospheric lifetimes of, 181 typical reactivity scales, 907-909 volatile organic, 18-19 Organic films on particles, 407-411 Organic nitrates absorption spectra, 102-103 photochemistry, 103 see also Nitrates, organic Organic hydroperoxides absorption spectra, 107-108 aqueous phase S(IV) oxidation, 313-314 photochemistry, 107 Oxidants, definition of, 547 Oxides of nitrogen, see NO, and NO,. Oxidizing species for organics in troposphere, 179-181 Oxygen absorption spectrum, 86-89 collision-induced absorptions, 89 photochemistry, 89-90 singlet molecular, 88-89 van der Waals molecules, 89 Oxygen-containing compounds biogenic emissions of, 229-231 hydroxyl radical reaction, 213-217 nitrate radical reaction, 213-217 OZIPR Model, 13, see Appendix III Ozone absorption cross sections, 92-93 absorption spectra, 90-91 actinic flux sensitivity to, 69-71 alkene reactions indoors, 860-861

kinetics and mechanisms, 196-201 amines, reactions with, 221-223 attenuation of solar radiation by, 56 biogenic organics, reactions with, 232-233 concentrations in stratosphere, 657-658, 736-741, 781 in troposphere, 583, 780-782, 914 control strategies for, 882-921

"deficit" problem, 661 depletion potentials, 730-733 global warming potential, 785 hydrazine reactions, 223-225 indicator species for, 916-917 indoors, 859-861

interference in hydroxyl radical measurement, 600 isopleths, 882-886, 915 isotopic composition in atmosphere, 661 Leighton relationship, 265-266 measurement methods for, 547, 548, 559,

583, 737-739 nitrogen dioxide reaction, 267 NO,, NO,., NOz, relationship to, 916-918 photochemistry, 91-95 production efficiency, 916 radiative forcing estimates, 784-788 in remote troposphere, formation and loss processes, 235-237 stratospheric injection into troposphere,

658-660 sources in troposphere, 180 trends in concentrations in stratosphere, 736-741 in troposphere, 780-783 in upper troposphere, 239-241 vertical distribution, 657-658 Ozone-olefin reactions; see Ozone-alkene reactions Ozonides primary (see also Molozonide), 196 secondary, 197

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