Nitrogen oxides and ozone production in the North Atlantic marine boundary layer

• Published in: Journal of Geophysical Research: Atmospheres
• Main Authors: Carsey, Thomas, Churchill, Dean, Farmer, Michael, Fischer, Charles, Pszenny, Alexander, Ross, Victor, Saltzman, Eric, Springer-Young, M., Bonsang, Bernard
• Other Authors: NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML), National Oceanic and Atmospheric Administration (NOAA), Rosenstiel School of Marine and Atmospheric Science (RSMAS), University of Miami Coral Gables, Massachusetts Institute of Technology (MIT), Naval Oceanographic Office, Centre des Faibles Radioactivités, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 1997
• Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces; environment; North Atlantic
• Online Access: https://hal.archives-ouvertes.fr/hal-03356969; https://hal.archives-ouvertes.fr/hal-03356969/document; https://hal.archives-ouvertes.fr/hal-03356969/file/96JD03511.pdf; https://doi.org/10.1029/96JD03511

International audience Measurements of reactive nitrogen gases (NO, NO2, NOy), as well as related chemical (O3, CO, aerosol black carbon, radon, selected nonmethane hydrocarbons) and meteorological parameters were made on board the R/V Malcolm Baldridge prior to and subsequent to the 1992 ASTEX (Atlantic Stratocumulus Transition Experiment) in the North Atlantic Ocean during June and July 1992. Results showed indications of welldefined plumes from North America and Europe from both chemistry and back trajectory data. Elevated ozone concentrations were also observed in airmasses from uninhabited continental regions. Chemical and meteorological data were incorporated into a simple photochemical model in which ozone destruction predominated over generation. The principal reaction leading to ozone destruction was O(•D) + H20-* 2OH.