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

Autor(en)

Lubna Dada, Hélène Angot, Ivo Beck, Andrea Baccarini, Lauriane L. J. Quelever, Matthew Boyer, Tiia M. Laurila, Zoé Brasseur, Gina Jozef, Gijs De Boer, Matthew D. Shupe *, Silvia Henning, Silvia Bucci, Marina Dütsch, Andreas Stohl, Tuukka Petäjä, Kaspar R. Daellenbach, Tuija Jokinen, Julia Schmale

Abstrakt

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.

Organisation(en)

Institut für Meteorologie und Geophysik

Externe Organisation(en)

École polytechnique fédérale de Lausanne, University of Helsinki, Paul Scherrer Institute, Leibniz-Institut für Troposphärenforschung, University of Colorado, Boulder, National Oceanic and Atmospheric Administration, The Cyprus Institute

Journal

Nature Communications

Band

13

Anzahl der Seiten

15

ISSN

2041-1723

DOI

https://doi.org/10.1038/s41467-022-32872-2

Publikationsdatum

09-2022

Peer-reviewed

Ja

ÖFOS 2012

103039 Aerosolphysik, 105206 Meteorologie

Schlagwörter

ASJC Scopus Sachgebiete

General, Allgemeine Physik und Astronomie, Allgemeine Chemie, Allgemeine Biochemie, Genetik und Molekularbiologie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/c10f22a7-3c5f-4c85-ba33-4cbd3c2d7c0b