Articles | Volume 21, issue 24
Atmos. Chem. Phys., 21, 18213–18225, 2021
Atmos. Chem. Phys., 21, 18213–18225, 2021

Research article 16 Dec 2021

Research article | 16 Dec 2021

Is the ocean surface a source of nitrous acid (HONO) in the marine boundary layer?

Leigh R. Crilley et al.

Data sets

ICOZA: Atmospheric species measurements of OH, HONO, HO2, NO, NO2, NOy, O3, SO2 and CO from Weybourne Atmosphere Observatory July 2015 Leigh Crilley, Louisa Kramer, Chris Reed, James D. Lee, Rob Massey-Woodward, Lisa Whalley, Grant Forster, and Brian Bandy

Cape Verde Atmospheric Observatory: NOxy measurements National Centre for Atmospheric Science

Short summary
Nitrous acid (HONO) is a key source of atmospheric oxidants. We evaluate if the ocean surface is a source of HONO for the marine boundary layer, using measurements from two contrasting coastal locations. We observed no evidence for a night-time ocean surface source, in contrast to previous work. This points to significant geographical variation in the predominant HONO formation mechanisms in marine environments, reflecting possible variability in the sea-surface microlayer composition.
Final-revised paper