Rqv

Hadley circulation, 659 Half-lives calculating, 133-134 definition, 132 Halogens measurement of, 565-566, 568 tropospheric chemistry, 241-244, 321-322 Halogen oxides absorption spectra, 113-114 dimethyl sulfide reaction, 333 Halons concentrations in troposphere, 734 lifetimes, 731-733 global warming potentials, 787-788 nomenclature, 701 ozone depletion potentials, 731-733 phaseout, 727-730 sources, 701-702 stratospheric chemistry, 702-706 Hartley bands in ozone absorption, 90 Hatch-Choate equations, for fine particle, 361

Hazardous air pollutants (HAPs), 925-930 Haze, 410, 803 HBr, see Hydrogen bromide HC1, see Hydrogen chloride Heats of formation, see Appendix I Henry's law for gas-liquid equilibrium, 151, 268, 295 values for some gases, 152, 296 Heterogeneous reactions analysis, 158-165 and climate change, 814 compilations of kinetics data, 172-173 in stratosphere, 677, 688-696, 705-706 High speed civil transport, 662-667 HN03, see Nitric acid H02, see Hydroperoxyl radical

HOx aqueous phase chemistry, 318-322 H202, see Hydrogen peroxide, H02N0, see Peroxynitrous acid H02N02, see Peroxynitric acid Huggins bands in ozone absorption, 91 Humidograph, 390-391 Hydrazines hydroxyl radical reaction, 223 nitric acid, reactions with, 225 nitrogen dioxide reactions with, 225 ozone reactions, 223-224 sources, 223 Hydrazinium nitrate aerosols, 225 Hydrochlorofluorocarbons (HCFC) concentrations in troposphere, 734-735 definition, 729

global warming potentials, 786-789

greenhouse effect, 783

hydroxyl radical reaction, 744-746,

749-750 lifetimes, 731-732, 752 ozone depletion potentials in stratosphere, 731-732

ozone formation potentials in troposphere, 752

radiative forcing by, 786-789 tropospheric chemistry of HCFC-125, -123, and -141b, 748-753 Hydrofluorocarbons (HFC) concentrations in troposphere, 734-735 definition, 729-730 global warming potentials, 786-789 greenhouse effect, 783 hydroxyl radical reaction, 744-746 lifetimes, 731-732, 752 ozone depletion potentials in stratosphere, 731-732

ozone formation potentials in troposphere, 782

radiative forcing by, 786-789 tropospheric chemistry of HFC-134a, 746-748, 750-753 Hydrogen bromide, absorption spectrum, 113 Hydrogen chloride absorption spectrum, 113 heterogeneous chemistry in stratosphere,

677, 688-696 measurement of in troposphere, 568 rotation-vibration infrared spectrum, 47 uptake onto ice, 686-687 uptake into sulfuric acid-water-nitric acid mixtures, 687-688 Hydrogen fuels, 921 Hydrogen peroxide absorption cross sections, 107-108 formation of, 235

concentrations in troposphere, 597-598 measurement techniques for, 555, 595-597 in natural troposphere, 234-239 photochemistry, 107

S(IV) reaction in solution, 313-314, 326 tunable diode laser spectrometry and, 555 Hydrogen sulfide, hydroxyl radical reaction with, 335

Hydroperoxides, organic absorption spectra and photochemistry, 107-108

formation in natural troposphere, 234-241 Henry's law constants, 296 oxidation of S(IV), 314 Hydroperoxyl radical aldehyde reactions, 216-217 alkylperoxy radical reactions, 186, 234-241 aqueous solution reactions, 320 concentrations in troposphere, 238-239, 606-607

fates in remote troposphere, 235-239 formaldehyde reaction, 216-217 Henry's law constant, 296 methyl peroxy radical reaction, 235-239 measurement techniques for, 604-606 nitrate radical reaction, 235 nitric oxide reaction, 235-239 remote troposphere, rates of formation,

236-237 self-reaction, 235 sources in gas phase, 180 sources in aqueous phase, 317, 320 from sulfur dioxide oxidation, 298 Hydroxyalkoxy radicals a-, reactions of, 194 ยก3-, reactions of, 193-194 Hydroxyl radical alcohol reactions, 216 aldehyde reactions, 213-214 alkane reactions, 182-184 alkene reactions, 191-196 alkyl nitrate and nitrite reactions, 221 alkyne reactions, 206-207 amine reactions, 221-222 aqueous phase chemistry, 278 aromatic hydrocarbon reactions, 207-211 biogenics, reactions with, 230-233 carboxylic acid reactions, 216 concentrations in troposphere, 560, 603-604

dimethyl sulfide reaction, 328-332 Henry's law constant, 296 hydrazine reactions, 223 measurement methods for, 559, 598-603 from nitrate radical reaction with liquid water, 278 nitric acid reaction, 281-282 nitric oxide reaction, 274 with nitrogen-containing organics, 220-225 nitrogen dioxide reaction, 266-267 with oxygen-containing organics, 213-217 reactivity scale, 907-908 remote troposphere, rates of formation in, 235-237

sources in aqueous phase, 315-322 sources in troposphere in gas phase,

179-180 sulfur dioxide reaction, 298-299 Hydroxymethane sulfonate, 331-332 Hygroscopic growth factor for particles,

372-373 Hypobromous acid, HOBr absorption spectrum and photochemistry, 115, 119, 120

stratospheric chemistry and, 701-706 tropospheric chemistry and, 242-244 Hypochlorous acid, HOC1

absorption spectrum and photochemistry, 115, 119

stratospheric chemistry and, 677, 686 tropospheric chemistry and, 242-244 Hypoiodous acid, absorption spectrum and photochemistry, 115, 120

Was this article helpful?

0 0

Post a comment