Vbi

Vg, deposition velocity, 33 Vapor pressure subcooled and gas-particle partition coefficient, 419-420 subcooled of PAH, 415 Vibrating orifice aerosol generator, 634 Virtual impactors, 611 Visibility and air pollution, 37-38, 369 Visual range definition, 368

light scattering and absorption, 368-369 measurement of, 369 Volcanic eruptions climate change, 793-794, 822 particles, 690-693 stratospheric ozone, 690-696 temperature changes, 794

Water content, fogs, clouds and rain, 308 Wet deposition, see Deposition White cell, schematic diagram, 549 see also Multiple pass cells

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