High resolution vertical distributions of NO3 and N2O5 through the nocturnal boundary layer

by S S Brown, W P Dube, H D Osthoff, D E Wolfe, W M Angevine, A R Ravishankara
Atmospheric Chemistry and Physics ()

Abstract

The shallow mixing depth and vertical stratification of the lowest levels of the atmosphere at night has implications for the chemistry of nitrogen oxides emitted from the surface. Here we report vertical profiles of NO(3), N(2)O(5) and O(3) measured from in-situ instruments on a movable carriage on a 300 m tower. The study offers high-resolution (< 1 m) vertical distributions of both NO(3) and N(2)O(5) and shows that the nocturnal mixing ratios of these compounds vary widely over short vertical distance scales ( 10 m or less). Furthermore, there are systematic differences in the steady state lifetimes of NO(3) and N(2)O(5) and in the partitioning among nitrogen oxides between different near-surface layers. These differences imply that NO(3) and N(2)O(5) occupy distinct chemical regimes as a function of altitude, potentially serving as sinks for nitrogen oxides and O(3) near the surface but as reservoirs of NO(x) and O(3) aloft.

Cite this document (BETA)

Readership Statistics

2 Readers on Mendeley
by Discipline
 
 
by Academic Status
 
50% Doctoral Student
 
50% Associate Professor

Sign up today - FREE

Mendeley saves you time finding and organizing research. Learn more

  • All your research in one place
  • Add and import papers easily
  • Access it anywhere, anytime

Start using Mendeley in seconds!

Sign up & Download

Already have an account? Sign in