Observations of atmospheric ozone: 38° to 76° north latitude at altitudes from 8 km to the surface
1984
Ozone data were obtained from 8 km to the surface and at latitudes from 38° to 76° N during January and February 1983. Flight lines covered northeastern U.S., Canada, and Greenland. The results of the latitudinal survey at 5- to 8-km altitude showed O3 mixing ratios to be ≃ 40 ppbv with little variation in latitude. One region of elevated O3 was observed and extended from 54° N to 57° N latitude. Ozone reached 150 ppbv at 6.4-km altitude. This sampling was stratospheric air as the tropopause height was 5.6-km altitude. Profiles at 76°, 67°, and 53° N showed O3 to be well mixed from about 5 km to the surface. In some cases, profiles identified a layer of 1 km to 100 m vertical dimension at the surface, in which O3 destruction had occurred.
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