The relative impact of stratospheric photochemical production on tropospheric NOylevels: a model study


Journal Article

We conclude that the stratospheric source is too small to account for background surface NOyconcentrations observed in the remote (i.e., regions a few thousand kilometers from continental source regions) troposphere. Surface NOymixing ratios seldom exceed 10 parts per trillion by volume (pptv) in the model northern hemisphere and are always below 20 pptv. Together, fossil fuel combustion emissions and stratospheric injection account for less than 10% of observed surface nitrate concentrations in the remote tropical Pacific. Inclusion of PAN chemistry has the effect of increasing model-calculated surface NOymixing ratios in the northern hemisphere middle and high latitudes by factors of 1.5-3 during winter/spring and by factors of 2-4 during summer/fall. -from Authors

Duke Authors

Cited Authors

  • Kasibhatla, PS; Levy, H; Moxim, WJ; Chameides, WL

Published Date

  • January 1, 1991

Published In

Volume / Issue

  • 96 / D10

International Standard Serial Number (ISSN)

  • 0148-0227

Citation Source

  • Scopus