Physics
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987georl..14...87i&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 14, Jan. 1987, p. 87-90.
Physics
11
Antarctic Regions, Ozone, Ozone Depletion, Atmospheric Temperature, Clouds, Ozonometry, Stratosphere
Scientific paper
Ozonesonde measurements at Syowa Station (69 deg 00 min S, 39 deg 35 min E) from 1971 to 1984 show that ozone depletion is most striking in the region 10 km to 25 km in the last five years. Active ozone loss region in the spring shows good correspondence to the region where noticeable drop in stratospheric temperature is observed from 1981 to 1985, but only in the spring. Monthly averaged lower-stratospheric temperature decreased smoothly during the period from about 1975 to the present in the spring. The temperatures in October and November of 1985 are comparable to the frost point temperature of water vapor with a 10 ppmv mixing ratio at about 100 mb. The temperature drops observed in interannual trends could activate formation of ice particles, and cause noticeable ozone loss in spring through heterogeneous ozone reduction reactions.
Iwasaka Yasunobu
Kondoh Koji
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