Photochemistry Of Atmospheric Ozone

Dütsch, H. U.

doi:10.1016/s0065-2687(08)60303-9

Cited by 100 publications

(16 citation statements)

References 78 publications

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“…The total ozone amount at Kagoshima is nearly equal to the zonal mean through all seasons as reported by Dutsch (1971). But the total ozone amount at Sapporo is about 10% larger than the zonal mean in winter and in spring, so that its latitudinal gradient near Japan is a little larger than the zonal mean one.…”

Section: Longitudinal Dependence O F Total Ozone Amountsupporting

confidence: 53%

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Photochemical and Dynamical Contributions to the Seasonal Variation of Total Ozone Amount over Japan

Iwasaki¹,

Kaneto²

1984

Journal of the Meteorological Society of Japan

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The latitudinal and seasonal variations of ozone photochemical process are analyzed using the monthly means of ozone density observed by ozonesondes at Sapporo, Tateno and Kagoshima.The estimated photochemical change rate (creation minus destruction) and observed ozone density variation are used to evaluate the divergence of ozone.The seasonal variation of total ozone amount at Kagoshima is mainly due to the density variation in the quasi steady region, where the photochemical change rate of ozone density is effectively balanced with its divergence.On the other hand, the variation at Sapporo is dominated by the dynamical process in the non-steady region.In this case, the primary effect in the dynamical process is the seasonal variation of tropopause height and the secondary one is the accumulation in the lower stratosphere due to the meridional circulation in winter.The former tends to set the time of maximum of total ozone amount in mid-winter and the latter shifts it to early spring. Especially, the continuous increase in the total ozone amount during winter is an evidence that the distribution of ozone remains at a transient state for the winter circulation.Such a remarkable difference between the mechanisms of the seasonal variation of total ozone amount in the two stations is originated from the variation of tropopause structure.The major tropopause that effectively separates the stratospheric air mass from the tropospheric one is the tropical tropopause through all seasons over Kagoshima, but it is the tropical one in summer and the polar one in winter over Sapporo.Finally, from the view point of the longitudinal dependence, the ozone distribution over Japan is discussed.

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Section: Longitudinal Dependence O F Total Ozone Amountsupporting

confidence: 53%

“…It is well-known that the total ozone amount shows a large seasonal variation with summer maximum in low latitudes and spring maximum in high latitudes (Dutsch, 1971). Both photochemical and dynamical processes contribute to this variation.…”

Section: Introductionmentioning

confidence: 99%

Photochemical and Dynamical Contributions to the Seasonal Variation of Total Ozone Amount over Japan

Iwasaki¹,

Kaneto²

1984

Journal of the Meteorological Society of Japan

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“…Different behavior of the seasonal march in total ozone between two polar regions is consistent with the different behavior of the wave activity in the stratosphere. In the NH, from midwinter to spring, the total ozone is increasing (Dutch, 1971), reflecting the intense wave activity and associated sudden warming during winter. On the other hand, in the SH, the total ozone is decreasing from midwinter to spring (Chubachi, 1984), reflecting the very stable polar low during winter in the SH.…”

Section: Summary and Discussionmentioning

confidence: 99%

Observations of the Stratospheric Final Warmings in the Two Hemispheres

Yamazaki¹

1987

Journal of the Meteorological Society of Japan

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A comparison is made of the stratospheric final warmings which occurred in the two hemispheres. The dataset for this study consists of the NMC 1200 GMT analysis between 0.4 and 1000 mb during 1982. The transformed Eulerian mean diagnosis is used for examining the wave, mean-flow interaction.The final warming occurred around March 31 in the Northern Hemisphere (NH) and around October 20 in the Southern Hemisphere (SH). Both warmings were associated with the enhanced planetary scale (wavenumber 1) wave activity. The final warming in the SH is more rapid and intense, which is consistent with the fact that the planetary scale wasve activity in the SH stratosphere is more intense than that in the NH stratosphere during the spring season. In the SH the polar easterly did not descend below 10mb after the final warming and circulation reversal below 10mb occurred about one month later, while the polar easterly kept descending to 50mb in the NH. The equatorial easterly in the lower stratosphere extended and connected to the polar easterly in the upper stratosphere of the SH, while the connection was not observed in the NH. A few days before the final warmings, the double jet structures were observed in the troposphere for both cases:The feature of the final warming in the SH of 1982 is very similar to that of 1979 studied by Yamazaki and Mechoso (1985).

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“…Even at the equinox, small asymmetry is seen because ozone distributes asymmetrically against the equator (Dutsch, 1971). In Fig.…”

Section: Notesmentioning

confidence: 89%