Publications

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 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 signatures of climate patterns over the Euro-Atlantic sector in the spring.

Orsolini, Y.J.; Doblas-Reyes, F.J.

Ozone soundings at the Nadir database: processing of data for ECMWF and a study of long-term trends.

Vik, A.F.; Hansen, G.; Bojkov, B.R.; Westbye, A.

Ozone trends and impacts on health and crop yields.

Dentener, F.; Simpson, D.; Wild, O.; Klimont, Z.; Colette, A.; Tarasova, O.; Solberg, S.; Harmens, H.; Fagerli, H.; Mills, G.; Grennfelt, P.; Almodovar, P.; Scavo, K.; Kerr, J.; Pritula, D.; Reiss, I.

Ozone variability and halogen oxidation within the Arctic and sub-Arctic springtime boundary layer.

Gilman, J.B.; Burkhart, J.F.; Lerner, B.M.; Williams, E.J.; Kuster, W.C.; Goldan, P.D.; Murphy, P.C.; Warneke, C.; Fowler, C.; Montzka, S.A.; Miller, B.R.; Miller, L.; Oltmans, S.J.; Ryerson, T.B.; Cooper, O.R.; Stohl, A.,, de Gouw, J.A.

Ozone.

Solberg, S.; Simpson, D.; Jonson, J.E.; Hjellbrekke, A.-G.; Derwent, R.

Ozonlaget - det løste miljøproblemet? Kronikk.

Hansen, G.

Ozonlaget over Norge har stabilisert seg.

Solbakken, C.F.

PAH in moss from Norway: Spatial distribution and comparison with metal data. NILU F

Uggerud, H.T.; Steinnes, E.; Schlabach, M.; Berg, T.

PAH measurements in air and moss around selected industrial sites in Norway 2015. NILU report

Halse, A. K.; Uggerud, H.; Schlabach, M.; Steinnes, E.

On request from the Norwegian Environment Agency a pilot study of atmospheric deposition of PAH around industrial enterprises in Norway has been carried out. The participation was voluntary and 10 industries located at 10 different sites financed their own participation. The survey is based on analysis of samples of naturally growing moss collected around the enterprises during the summer of 2015. In addition, passive air samplers for collection of volatile PAH were placed around 6 of the participating enterprises. Generally, the PAH level determined in moss collected around industrial sites were considerably higher than the PAH level found in moss collected at background sites. The levels of PAHs found in the air samples was low and often at the same level as found at the closest background site, for all out of two sites, i.e. Sunndal and Kristiansand. There is no clear indication that the industry is the only source to the levels of PAHs in moss. Hence, results from this pilot study, illustrates that moss and air samples together provide a more comprehensive information regarding the spatial distribution of PAH around the industrial sites.