Ozone impact from solar energetic particles cools the polar stratosphere.

Autor: Szela G ME; Space and Earth Observation Centre, Finnish Meteorological Institute, Helsinki, Finland. monika.szelag@fmi.fi., Marsh DR; Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO, USA.; Faculty of Engineering and Physical Sciences, University of Leeds, Leeds, UK., Verronen PT; Space and Earth Observation Centre, Finnish Meteorological Institute, Helsinki, Finland.; Sodankylä Geophysical Observatory, University of Oulu, Sodankylä, Finland., Seppälä A; Department of Physics, University of Otago, Dunedin, New Zealand., Kalakoski N; Space and Earth Observation Centre, Finnish Meteorological Institute, Helsinki, Finland.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2022 Nov 12; Vol. 13 (1), pp. 6883. Date of Electronic Publication: 2022 Nov 12.
DOI: 10.1038/s41467-022-34666-y
Abstrakt: Understanding atmospheric impacts of solar energetic particle precipitation (EPP) remains challenging, from quantification of the response in ozone, to implications on temperature. Both are necessary to understand links between EPP and regional climate variability. Here we use a chemistry-climate model to assess the importance of EPP on late winter/spring polar stratosphere. In transient simulations, the impact on NO y , ozone, and temperature is underestimated when using EPP forcing from the current recommendation of the Coupled Model Intercomparison Project (CMIP6). The resulting temperature response is largely masked by overall dynamical variability. An idealised experiment with EPP forcing that reproduces observed levels of NO y results in a significant reduction of ozone (up to 25%), cooling the stratosphere (up to 3 K) during late winter/spring. Our results unravel the inconsistency regarding the temperature response to EPP-driven springtime ozone decrease, and highlight the need for an improved EPP forcing in climate simulations.
(© 2022. The Author(s).)
Databáze: MEDLINE
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