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FTIR Measurements of Stratospheric Gases at the St. Petersburg Site

Springer Proceedings in Earth and Environmental Sciences, ISSN: 2524-3438, Vol: 2023, Page: 43-53
2023
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Book Chapter Description

Ozone anomalies that occur during winter-spring periods in the Northern Hemisphere have been increasingly observed in recent decades not only in polar, but also in mid-polar regions, including territories of megacities. Regular monitoring of stratospheric gases involved in ozone-depleting processes is essential for predicting the appearance of ozone mini-holes and the growth of UV surface illumination. Long-term ground-based FTIR (Fourier Transform Infrared) measurements have been performed at the St. Petersburg site (60N, 30E) since 2009. The location of St. Petersburg near the border of mid and high latitudes allows to observe the stratospheric gases variations under different atmospheric conditions, including polar vortex intrusion. We analyzed time series of O, HNO, ClONO, HCl, and HF atmospheric measurements at the St. Petersburg site in 2009–2022, compared them with independent satellite measurements (ACE-FTS) and demonstrated the capabilities of ground-based FTIR method to study and explain the temporal variability of the stratospheric trace-gases in winter-spring period of 2016.

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