@article{22074,
  author = {Seema Bhangar and Shannon Cowlin and Brett C Singer and Richard G Sextro and William W Nazaroff},
  title = {Ozone levels in passenger cabins of commercial aircraft on North American and transoceanic routes},
  abstract = {<p>Ozone levels in airplane cabins, and factors that influence them, were  studied on northern hemisphere commercial passenger flights on domestic  U.S., transatlantic, and transpacific routes. Real-time data from 76  flights were collected in 2006–2007 with a battery-powered UV  photometric monitor. Sample mean ozone level, peak-hour ozone level, and  flight-integrated ozone exposures were highly variable across domestic  segments (N = 68), with ranges of &lt;1.5 to 146 parts per  billion by volume (ppbv), 3−275 ppbv, and &lt;1.5 to 488 ppbv-hour,  respectively. On planes equipped with ozone catalysts, the mean  peak-hour ozone level (4.7 ppbv, N = 22) was substantially lower than on planes not equipped with catalysts (47 ppbv, N = 46). Peak-hour ozone levels on eight transoceanic flight segments,  all on planes equipped with ozone catalysts, were in the range &lt;1.5  to 58 ppbv. Seasonal variation on domestic routes without converters is  reasonably modeled by a sinusoidal curve that predicts peak-hour levels  to be approximately 70 ppbv higher in Feb−March than in Aug−Sept. The  temporal trend is broadly consistent with expectations, given the  seasonal cycle in tropopause height. Episodically elevated (&gt;100  ppbv) ozone levels on domestic flights were associated with  winter−spring storms that are linked to enhanced exchange between the  lower stratosphere and the upper troposphere. </p>},
  year = {2008},
  journal = {Environmental Science and Technology},
  volume = {42},
  number = {11},
  pages = {3938-43},
  doi = {10.1021/es702967k},
  language = {eng},
}