KFU. Card publication. A Study of the Low-Ozone Episode over Scandinavia and Northwestern Russia in March 2025

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FEDERAL UNIVERSITY

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A STUDY OF THE LOW-OZONE EPISODE OVER SCANDINAVIA AND NORTHWESTERN RUSSIA IN MARCH 2025

Form of presentation

Articles in international journals and collections

Year of publication

2025

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Authors, employees of KFU

Guryanov Vladimir Vladimirovich, author

Other authors

Vargin Pavel Nikolaevich, author

Smyshlyaev Sergey Pavlovich, author

Bibliographic description in the original language

Vargin, Pavel & Smyshlyaev, Sergei & Guryanov, Vladimir & Chubarova, Natalia & Ionov, Dmitry & Bankova, Tatjana & Ivanova, Natalya & Solomatnikova, Anna. (2025). A Study of the Low-Ozone Episode over Scandinavia and Northwestern Russia in March 2025. Atmosphere. 16. 1033. 10.3390/atmos16091033.

Annotation

Following a very cold first half of the Arctic stratosphere winter of 2024–2025, the stratospheric polar vortex weakened from late February. The increase in the polar lower stratosphere temperature led to a decrease in the polar stratospheric cloud (PSC) type I (NAT) volume from ~80 million km3 to zero. The polar vortex weakening and temperature increase continued in early March, when major sudden stratospheric warming occurred. Although the polar cap total column ozone (TCO) significantly increased during this period, an ozone mini-hole formed over Scandinavia and northwestern Russia, with TCO values as low as 220–240 Dobson units, according to satellite observations and ground-based measurements over St. Petersburg and Moscow on 5–6 March 2025. Chemistry-transport model calculations using MERRA2 reanalysis data were performed to investigate the role of chemical ozone depletion and dynamical processes in the low TCO values in early March. Model experiments show that dynamical processes played a predominant role in the formation of low TCO values, but the role of chemical processes was not negligible. Associated with the TCO anomaly, the difference relative to the standard ozone level in the UV indices over Moscow, St. Petersburg and Helsinki reached up to 60–100%.

Keywords

ozone layer; low-ozone episode; Arctic stratospheric polar vortex; ground-based ozone measurements; satellite ozone observations; chemistry-transport model; UV radiation

The name of the journal

Atmosphere

URL

https://www.mdpi.com/2073-4433/16/9/1033

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=319564&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Guryanov Vladimir Vladimirovich	ru_RU
dc.contributor.author	Vargin Pavel Nikolaevich	ru_RU
dc.contributor.author	Smyshlyaev Sergey Pavlovich	ru_RU
dc.date.accessioned	2025-01-01T00:00:00Z	ru_RU
dc.date.available	2025-01-01T00:00:00Z	ru_RU
dc.date.issued	2025	ru_RU
dc.identifier.citation	Vargin, Pavel & Smyshlyaev, Sergei & Guryanov, Vladimir & Chubarova, Natalia & Ionov, Dmitry & Bankova, Tatjana & Ivanova, Natalya & Solomatnikova, Anna. (2025). A Study of the Low-Ozone Episode over Scandinavia and Northwestern Russia in March 2025. Atmosphere. 16. 1033. 10.3390/atmos16091033.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=319564&p_lang=2	ru_RU
dc.description.abstract	Atmosphere	ru_RU
dc.description.abstract	Following a very cold first half of the Arctic stratosphere winter of 2024–2025, the stratospheric polar vortex weakened from late February. The increase in the polar lower stratosphere temperature led to a decrease in the polar stratospheric cloud (PSC) type I (NAT) volume from ~80 million km3 to zero. The polar vortex weakening and temperature increase continued in early March, when major sudden stratospheric warming occurred. Although the polar cap total column ozone (TCO) significantly increased during this period, an ozone mini-hole formed over Scandinavia and northwestern Russia, with TCO values as low as 220–240 Dobson units, according to satellite observations and ground-based measurements over St. Petersburg and Moscow on 5–6 March 2025. Chemistry-transport model calculations using MERRA2 reanalysis data were performed to investigate the role of chemical ozone depletion and dynamical processes in the low TCO values in early March. Model experiments show that dynamical processes played a predominant role in the formation of low TCO values, but the role of chemical processes was not negligible. Associated with the TCO anomaly, the difference relative to the standard ozone level in the UV indices over Moscow, St. Petersburg and Helsinki reached up to 60–100%.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject		ru_RU
dc.title	A Study of the Low-Ozone Episode over Scandinavia and Northwestern Russia in March 2025	ru_RU
dc.type	Articles in international journals and collections	ru_RU