Publications

Ozone responses to the geomagnetic storms in 2024 and 2025

Jia, Jia; Orsolini, Yvan; Kero, Antti; Zhang, Jiarong; Thomas, Neethal; Grandin, Maxime; Kamp, Max Van de; Espy, Patrick Joseph

Solar Cycle 25 has approached its maximum phase, bringing an elevated frequency of solar eruptive events and associated geomagnetic disturbances. During 2024 and 2025, several intense geomagnetic storms have provided rare opportunities to examine the short-term coupling between space‐weather forcing and the middle atmosphere. Previous studies have shown that energetic particle precipitation (EPP) during geomagnetic storms can substantially modify the chemical composition of the mesosphere and lower thermosphere (MLT), particularly through the production of odd nitrogen (NOx) and odd hydrogen (HOx), which catalytically destroy ozone. In this presentation, we investigate the MLT ozone responses to several large geomagnetic storms occurring in 2024–2025 using MLS satellite observation. We will also estimate the particle forcing associated with these events using the observed ozone chemical responses. This analysis provides a testbed for climate model inputs.

Ozone responses to the geomagnetic storms in 2024 and 2025

Ozone profiles in the high-latitude stratosphere and lower mesosphere measured by the Improved Limb Atmospheric Spectrometer (ILAS)-II: Comparison with other satellite sensors and ozonesondes.

Sugita, T.; Nakajima, H.; Yokota, T.; Kanzawa, H.; Gernandt, H.; Herber, A.; von der Gathen, P.; König-Langlo, G.; Sato, K.; Dorokhov, V.; Yushkov, V.A.; Murayama, Y.; Yamamori, M.; Godin-Beekmann, S.; Goutail, F.; Roscoe, H.K.; Deshler, T.; Yela, M.; Taalas, P.; Kyrö, E.; Oltmans, S.J.; Johnson, B.J.; Allaart, M.; Litynska, Z.; Klekociuk, A.; Andersen, S.B.; Braathen, G.O.; et al.

Ozone minihole observation over the Balkan Peninsula in March 2003. Poster presentation. NILU PP

Werner, R.; Valev, D.; Atanasov, A.; Kostadinov, I.; Petkov, B.; Giovanelli, G.; Stebel, K.; Petrotoli, A.; Palazzi, E.; Gausa, M.

Ozone measurements in Telemark, Oslofjorden and Oslo, during the summer of 1980. NILU OR

Schjoldager, J.; Dreiem, R.; Gundersen, G.; Stige, L.; Tveita, B.

Ozone measurements 2022

Hjellbrekke, Anne-Gunn; Solberg, Sverre

This report gives an overview of annual statistics and results from the monitoring programme of ozone in EMEP 2022.

NILU

Ozone measurements 2020

Hjellbrekke, Anne-Gunn; Solberg, Sverre

NILU

Ozone measurements 2018

Hjellbrekke, Anne-Gunn; Solberg, Sverre

NILU

Ozone measurements 2016

Hjellbrekke, Anne-Gunn; Solberg, Sverre

NILU

Ozone measurements 2014. EMEP/CCC

Hjellbrekke, A.-G.; Solberg, S.

Ozone measurements 2012. EMEP/CCC

Hjellbrekke, A.-G.; Solberg, S.

Ozone measurements 2010. EMEP/CCC

Hjellbrekke, A.-G.; Solberg, S.; Fjæraa, A.M.