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Article Dans Une Revue Nature Communications Année : 2022

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

Lubna Dada
Hélène Angot
Ivo Beck
  • Fonction : Auteur
Andrea Baccarini
Lauriane L J Quéléver
  • Fonction : Auteur
Matthew Boyer
  • Fonction : Auteur
Tiia Laurila
  • Fonction : Auteur
Zoé Brasseur
Gina Jozef
  • Fonction : Auteur
Gijs de Boer
Matthew D Shupe
Silvia Henning
Silvia Bucci
Marina Dütsch
Andreas Stohl
Tuukka Petäjä
Kaspar R Daellenbach
Tuija Jokinen
  • Fonction : Auteur
Julia Schmale

Résumé

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 recordbreaking 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. 1234567890():,; 1234567890():,;
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Dates et versions

hal-04383091 , version 1 (09-01-2024)

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Lubna Dada, Hélène Angot, Ivo Beck, Andrea Baccarini, Lauriane L J Quéléver, et al.. A central arctic extreme aerosol event triggered by a warm air-mass intrusion. Nature Communications, 2022, 13, ⟨10.1038/s41467-022-32872-2⟩. ⟨hal-04383091⟩
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