Mathematics – Logic
Scientific paper
May 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.2519e&link_type=abstract
Journal of Geophysical Research, vol. 84, May 20, 1979, p. 2519-2524.
Mathematics
Logic
1
Meteorological Flight, Ozonometry, Ozonosphere, Partial Pressure, Stratosphere, Aerosols, Midlatitude Atmosphere, Wind Effects
Scientific paper
A persistent minimum was observed in the ozone partial pressure profile at 38 mb over Yorkton, Saskatchewan (51 deg N, 102 deg W), on each of 27 ozonesonde flights between August 7 and 31, 1976. This notch in the profile has an average vertical extent of 3 km and an average decrease in the partial pressure or mixing ratio of 35% below the adjacent maxima. The persistence and spatial extent of this phenomenon were investigated. An ozone-aerosol flight at Laramie, Wyoming (41 deg N, 106 deg W), on August 6 also showed a minimum in both the ozone and aerosol profiles. It is demonstrated that this is a frequent phenomenon of the stratosphere which occurs at mid-latitudes in late summer. The phenomenon occurs within a broader layer of very light winds situated between the westerlies below and easterlies above. From the evidence available it is not possible to choose between differential quasi-horizontal advection and a photochemical sink as the mechanism responsible for producing the layer.
Asbridge I. A.
Evans Wayne F. J.
Mateer C. L.
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