A central arctic extreme aerosol event triggered by a warm air-mass intrusion

Lubna Dada (), Hélène Angot, Ivo Beck, Andrea Baccarini, Lauriane L. J. Quéléver, Matthew Boyer, Tiia Laurila, Zoé Brasseur, Gina Jozef, Gijs Boer, Matthew D. Shupe, Silvia Henning, Silvia Bucci, Marina Dütsch, Andreas Stohl, Tuukka Petäjä, Kaspar R. Daellenbach, Tuija Jokinen and Julia Schmale ()
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Lubna Dada: Ecole Polytechnique Fédérale de Lausanne (EPFL) Valais Wallis
Hélène Angot: Ecole Polytechnique Fédérale de Lausanne (EPFL) Valais Wallis
Ivo Beck: Ecole Polytechnique Fédérale de Lausanne (EPFL) Valais Wallis
Andrea Baccarini: Ecole Polytechnique Fédérale de Lausanne (EPFL) Valais Wallis
Lauriane L. J. Quéléver: University of Helsinki
Matthew Boyer: University of Helsinki
Tiia Laurila: University of Helsinki
Zoé Brasseur: University of Helsinki
Gina Jozef: University of Colorado
Gijs Boer: University of Colorado
Matthew D. Shupe: University of Colorado
Silvia Henning: Leibniz Institute for Tropospheric Research
Silvia Bucci: University of Vienna
Marina Dütsch: University of Vienna
Andreas Stohl: University of Vienna
Tuukka Petäjä: University of Helsinki
Kaspar R. Daellenbach: Laboratory of Atmospheric Chemistry, Paul Scherrer Institute
Tuija Jokinen: University of Helsinki
Julia Schmale: Ecole Polytechnique Fédérale de Lausanne (EPFL) Valais Wallis

Nature Communications, 2022, vol. 13, issue 1, 1-15

Abstract: Abstract Frequency and intensity of warm and moist air-mass intrusions into the Arctic have increased over the past decades and have been related to sea ice melt. During our year-long expedition in the remote central Arctic Ocean, a record-breaking increase in temperature, moisture and downwelling-longwave radiation was observed in mid-April 2020, during an air-mass intrusion carrying air pollutants from northern Eurasia. The two-day intrusion, caused drastic changes in the aerosol size distribution, chemical composition and particle hygroscopicity. Here we show how the intrusion transformed the Arctic from a remote low-particle environment to an area comparable to a central-European urban setting. Additionally, the intrusion resulted in an explosive increase in cloud condensation nuclei, which can have direct effects on Arctic clouds’ radiation, their precipitation patterns, and their lifetime. Thus, unless prompt actions to significantly reduce emissions in the source regions are taken, such intrusion events are expected to continue to affect the Arctic climate.

Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-32872-2

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DOI: 10.1038/s41467-022-32872-2

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