Depletion of the ozone column over the Andes mountains of South America

Da Silva, L. (2002) Depletion of the ozone column over the Andes mountains of South America. Il nuovo cimento C, 25 (1). pp. 35-44. ISSN 1826-9885

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Data on the ozone column has been published by NASA since 1978. They show a clear decrease every summer in the ozone column over the Andes Mountains, extending from Ecuador southward to approximately 33◦ latitude in Chile. In order to determine the characteristics of this decrease, cross-sections of the column were taken at different latitudes using satellite data. The resulting graphs clearly confirm a significant decline in the concentration of the ozone column in the form of a depleted strip, flanked by asymmetric areas of higher ozone concentration. To find the cause of this seasonal ozone decrease, wind field velocities in the region and their vorticities were analysed at different heights. This revealed evidence that the ozone layer isb eing compressed by windscoming from above and windsmo ving upward from the troposphere, causing a redistribution in ozone density.

Item Type: Article
Additional Information: An earlier version of this work was accepted for presentation at the Quadrennial Ozone Symposium held on 3-8 July, 2000, at Sapporo, Japan, and later published in the Symposium Supplement.
Uncontrolled Keywords: Global change ; Solar radiation ; Information related to geographical regions: South America
Subjects: 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551.6 Climatologia e tempo atmosferico (Classificare qui i lo studio dei Cambiamenti climatici)
Depositing User: Marina Spanti
Date Deposited: 11 Mar 2020 16:00
Last Modified: 11 Mar 2020 16:00

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