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The present study examines the roles of advection and air compression in enhancing the stratospheric ozone layer over the North Bay of Bengal during winter. The most significant and novel observation reported is an increase in the stratospheric ozone layer between 21 and 23 km, with ozone partial pressure approximately 50 nbar higher than the typical profile in the eastern Indian subtropical region. The thickness of the observed ozone layer ranges from 2.1 to 2.4 km. Potential vorticity derived from reanalysis and vertical air motion from the Stratosphere‐Troposphere radar observations also supports the enhanced stratospheric ozone layer. Space‐borne ozone measurements also reveal the presence of a sporadic ozone layer structure over the North Bay of Bengal. These observations provide quantitative experimental evidence of the redistribution of stratospheric ozone over the Indian subtropical region during winter.
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Das et al. (2026) studied this question.
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