MEAN PROFILES OF TRACE REACTIVE SPECIES IN THE UNPOLLUTED MARINE SURFACE LAYER.

Anne M. Thompson, Donald H. Lenschow

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Abstract

Several aspects of trace gas photochemistry in the marine boundary layer were investigated using a time-dependent transport-kinetics model with one-dimensional eddy diffusion. The photochemical scheme in the model is represented by a conventional complement of reactions involving O, H, N, and methane-derived organic species; boundary conditions are assigned which give low surface mixing ratios of O//3 and NO//x characteristic of the remote marine environment. Particular attention has been given to the distribution of odd nitrogen and the NO//2-NO-O//3 photostationary state in the surface boundary layer. Calculated profiles of NO, NO//2, O//3, and HNO//3 show definite gradients in the surface layer. When the ocean is assumed to be a source of NO, mixing ratios on the order of a few parts per trillion can be supported by an upflux of approximately 10**8 cm** minus **2 s ** minus **1. If a surface input of NO is not assumed, NO//x levels are much lower. Calculated values of the O//3-NO-NO//2 photostationary state ratio, R//p//s, and NO/HNO//3 show appreciable variation within the surface layer. The latter ratio is sensitive to the NO upflux and to heterogeneous removal of HNO//3.

Original languageEnglish (US)
Pages (from-to)4788-4796
Number of pages9
JournalJournal of Geophysical Research
Volume89
Issue numberD3
DOIs
StatePublished - Jan 1 1984

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All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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