T

TAC, see Toxic air contaminants Teflon film, ultraviolet transmission spectrum of, 873-874 Temperature effects on kinetics, 138-141 from ice core data, 827 inversions, 28-30 potential, 28 trends, 823-825 Termolecular reactions and pressure dependence of rates, 133-138 temperature dependence of, 138-139 Ternary solutions in polar stratospheric clouds, 681-686 Terpenes, measurement of, 566 Tetraterpenes, 226 Thermal inversion, 28-30 Thermograph, for particle measurement, 391 Total carbon, measurement methods, 623-625

Toxic air contaminants (TAC), 925-930 Transient nuclei, see Aitken nuclei Transition flow reactors, 568 Transition metal ions, in aqueous phase reactions, 312-322 Transition state theory, 140-141 Tropical pipe, 659 Tropopause, 2, 3 Troposphere, 2

Tube furnace for particle generation, 634 Tunable diode laser spectrometry application to atmospheric studies, 554, 901, 903

basis of technique, 552-554 detection limits, 552 Turnover time, for species emitted into atmosphere, 774 Type I polar stratospheric clouds, 682-690 Type II polar stratospheric clouds, 683-690

Upper troposphere hydroxyl radical in, 240 oxides of nitrogen, 240-241 sources of HOx radicals, 240 Ultrasonic nebulizer, 633 Ultraviolet radiation trends in, at surface, 741-744 UV-A, UV-B, UV-C, 55 US Clean Air Act Amendments of 1990, 436 US Environmental Protection Agency "Priority PAH," 436-438

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