National Oceanic and
Atmospheric Administration
United States Department of Commerce


FY 2004

Nighttime removal of NOx in the summer marine boundary layer

Brown, S.S., J.E. Dibb, H. Stark, M. Aldener, M. Vozella, S. Whitlow, E.J. Williams, B.M. Lerner, R. Jakoubek, A.M. Middlebrook, J.A. DeGouw, C. Warneke, P.D. Goldan, W.C. Kuster, W.M. Angevine, D.T. Sueper, P.K. Quinn, T.S. Bates, J.F. Meagher, F.C. Fehsenfeld, and A.R. Ravishankara

Geophys. Res. Lett., 31, L07108, doi: 10.1029/2004GL019412 (2004)

The nitrate radical, NO, and dinitrogen pentoxide, NO, are two important components of nitrogen oxides that occur predominantly at night in the lower troposphere. Because a large fraction of NO reacts to form NO and NO during the course of a night, their fate is an important determining factor to the overall fate of NO (=NO and NO). As a comprehensive test of nocturnal nitrogen oxide chemistry, concentrations of O, NO, NO, NO , NO, HNO and a host of other relevant compounds, aerosol abundance and composition, and meteorological conditions were measured in the marine boundary layer from the NOAA research vessel Ronald H. Brown off the East Coast of the United States as part of the New England Air Quality Study (NEAQS) during the summer of 2002. The results confirm the prominent role of NO and NO in converting NO to HNO at night with an efficiency on par with daytime photochemical conversion. The findings demonstrate the large role of nighttime chemistry in determining the NO budget and consequent production of ozone.

Feature Publications | Outstanding Scientific Publications

Contact Sandra Bigley |