Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/18836
Title: Ground-based measurements of NOx and total reactive oxidized nitrogen (NOy) at Sable Island, Nova Scotia, during the NARE 1993 summer intensive
Authors: Wang, T 
Carroll, MA
Albercook, GM
Owens, KR
Duderstadt, KA
Markevitch, AN
Parrish, DD
Holloway, JS
Fehsenfeld, FC
Forbes, G
Ogren, J
Issue Date: 1996
Publisher: Wiley-Blackwell
Source: Journal of geophysical research. Atmospheres, 1996, v. 101, no. 22, p. 28991-29004 How to cite?
Journal: Journal of geophysical research. Atmospheres 
Abstract: Measurements of NO, NO2, and total reactive oxidized nitrogen (NOy) were added to ongoing measurements of aerosols, CO, and O3 at Sable Island (43°55′N, 60°01′W), Nova Scotia, during the North Atlantic Regional Experiment (NARE) 1993 summer intensive. Ambient levels of NOx and NOy were found to be highly variable, and elevated levels can be attributed to the transport of polluted continental air or presumably to relatively fresh emissions from sources upwind (e.g., ship traffic). The median values for NOx and NOy are 98 and 266 parts per trillion by volume (pptv), respectively. A multiday pollution episode occurred during which elevated NOx and NOy were observed with enhanced levels of O3, CO, and condensation nuclei. Air masses of recent tropical marine origin characterized by low and constant levels of O3 and CO were sampled after Hurricane Emily. The correlation between ozone and CO is reasonably good, although the relation is driven by the single pollution episode observed during the study. The correlation of O3 with NOy and with NOy-NOx is complicated by the presumed NOy removal processes in the marine boundary layer. Examination of the radiosonde data and comparisons of the surface data with those obtained on the overflying aircraft provide clear indications of vertical stratification above the site.
URI: http://hdl.handle.net/10397/18836
ISSN: 2169-897X
EISSN: 2169-8996
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