Airborne lidar measurements of surface ozone depletion over Arctic sea ice

  • Seabrook J
  • Whiteway J
  • Gray L
 et al. 
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A differential absorption lidar (DIAL) for measurement of atmospheric ozone concentration was operated aboard the Polar-5 research aircraft in order to study ozone depletions over Arctic sea ice. The lidar measurements during a flight over the sea ice north of Barrow, Alaska on 3 April 2011 found a surface level depletion of ozone over a range of 300 km. The photochemical destruction of ground level ozone was strongest at the most northern point of the flight, and steadily decreased towards land. All the observed ozone depleted air throughout the flight occurred within 300 m of the sea ice surface. A back-trajectory analysis of the air measured throughout the flight indicated that the ozone depleted air originated from the north over the ice. Air at the surface that was not depleted in ozone had originated from over land to the south. An investigation into the altitude history of the ozone depleted air suggests a strong inverse correlation between measured ozone levels up to 1700 m in altitude, and the amount of time the air directly interacted with the sea ice. [ABSTRACT FROM AUTHOR]

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  • Andreas HerberAlfred Wegener Institute for Polar and Marine Research Research Unit Potsdam

  • J. A. Seabrook

  • J. A. Whiteway

  • L. H. Gray

  • R. Staebler

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