摘要:

Mass spectrometer measurements of ozone made during two balloon flights included its heavy isotopes at mass 49 and 50. Both flights were flown during the day and during summer from Palestine, TX. At float altitudes above 42 km the enrichments in heavy ozone were 41% and 23%, respectively. The enrichment appears to be mass independent since, at high altitudes, both 49 and 50 show the same enhancement. During the descent the enrichment in heavy ozone decreased, faster during the first flight than during the second, reaching values between 15 and 20% above 30 km. Near and below this altitude another increase is observed. During a night flight, previously reported, an enhancement in heavy ozone of over 40% at 32 km was found, decreasing both toward higher and lower altitudes.

ISSN:0094-8276    

DOI:10.1029/GL014i001p00080

年代:1987

数据来源: WILEY

摘要:

Results of balloon borne soundings with electrochemical ozone sondes carried out at 70,77° S; 11,85° E are discussed. During polar spring in 1985 the high time resolution of soundings (about 12 launches per months) gives a detailed picture on the vertical distribution and height variations of different maxima of ozone partial pressure near the margin of the ozone hole crossing the continental coast above Queen Maud Land in recent tim

ISSN:0094-8276    

DOI:10.1029/GL014i001p00084

年代:1987

数据来源: WILEY

摘要:

Ozonesonde measurements at Syowa Station (69°00′S, 39°35′E) from 1971 to 1984 show that ozone depletion is most striking in the region 10km to 25km 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 10 ppmv mixing ratio at about 100mb. The temperature drops observed in interannual trends could activate formation of ice particles, and cause noticeable ozone loss in spring through heterogenous ozone reduction re

ISSN:0094-8276    

DOI:10.1029/GL014i001p00087

年代:1987

数据来源: WILEY

摘要:

It has recently been suggested (Bates [1986]) that the rate constant for the O + O2recombination reaction to form ozone should be surprisingly dependent on the isotopic composition of the reactants and products through their symmetry numbers. The argument neglected the fact that isotope exchange and recombination reactions share a common energized collision complex, which can decay by dissociation to products which are isotopically distinct from the original reactants. Proper accounting for this additional exit channel in isotopically labeled O3*eliminates this apparent "symmetry number" effect.

ISSN:0094-8276    

DOI:10.1029/GL014i001p00091

年代:1987

数据来源: WILEY

ISSN:0094-8276    

DOI:10.1029/GL014i001p00094

年代:1987

数据来源: WILEY