Characteristics and effects of aerosols during blowing snow events in the central Arctic
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- Ecole Polytechnique Federale Lausanne (EPFL), Sion (Switzerland)
- Ecole Polytechnique Federale Lausanne (EPFL), Sion (Switzerland); Queensland University of Technology, Brisbane, QLD (Australia)
- Ecole Polytechnique Federale Lausanne (EPFL), Sion (Switzerland); University of Grenoble Alpes, Grenoble (France). Institut de Recherche pour le Développement (IRD); Centre National de la Recherche Scientifique (CNRS), Grenoble (France). Institut des Géosciences de l’Environnement (IGE); French National Research Institute for Agriculture, Food and Environment (INRAE), Grenoble (France); Institut Polytechnique de Grenoble (Grenoble INP) (France)
- University of Leeds (Untied Kingdom)
- University of Helsinki (Finland)
- Colorado State University, Fort Collins, CO (United States)
- Leibniz Institute for Tropospheric Research (ITR), Leipzig (Germany)
- Natural Environment Research Council (UKRI-NERC), Cambridge (United Kingdom). British Antarctic Survey (BAS)
- Westlake University, Hangzhou (China)
- University of Helsinki (Finland); The Cyprus Institute (CyI), Nicosia (Cyprus). Climate & Atmosphere Research Centre (CARE-C)
- University of Colorado, Boulder, CO (United States)
- UiT The Arctic University of Norway, Tromso (Norway); Northumbria University, Newcastle (United Kingdom)
- University of Colorado, Boulder, CO (United States); National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States)
- University of Michigan, Ann Arbor, MI (United States)
- WSL Institute for Snow and Avalanche Research, Davos Dorf (Switzerland)
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Washington University, St. Louis, MO (United States)
Sea salt aerosol (SSaer) significantly impacts aerosol-radiation and aerosol-cloud interactions, and sublimated blowing snow is hypothesized to be an important SSaer source in polar regions. Understanding blowing snow and other wind-sourced aerosols’ climate relevant properties is needed, especially during winter when Arctic amplification is greatest. However, most of our understanding of blowing snow SSaer comes from modeling studies, and direct observations are sparse. Additionally, SSaer can originate from multiple sources, making it difficult to disentangle emission processes. Here, we present comprehensive observations of wind-sourced aerosol during blowing snow events from the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition in the central Arctic. High wind speed strongly enhances total aerosol number, submicron sodium chloride mass, cloud condensation nuclei concentrations, and scattering coefficients. Generally, the relative response of aerosol properties to wind speed enhancement is strongest in fall when Arctic aerosol concentrations are lowest. Blowing snow events showed similar aerosol and environmental properties across events, apart from occasions with high snow age (>6 days since last snowfall). Coarse-mode number concentrations (>1 μm) are better explained by variability in wind speed averaged over 12-h air mass back trajectories arriving at the MOSAiC site compared to local, instantaneous wind speed, suggesting the importance of regional transport and consideration of air mass history for wind-driven aerosol production. These MOSAiC observations provide new insights into wind-driven aerosol in the central Arctic and may help validate modeling studies and improve model parameterizations particularly for aerosol direct and indirect radiative forcing.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Polytechnique Fe´ de´ rale de Lausanne (EPFL) Valais Wallis, Sion, Switzerland; University of Colorado, Boulder, CO (United States)
- Sponsoring Organization:
- Academy of Finland; Academy of Finland (AKA); European Union (EU); European Union’s Horizon 2020 research and innovation program; NOAA Cooperative agreement; National Aeronautics and Space Administration (NASA); National Oceanic and Atmospheric Administration (NOAA); Natural Environment Research Council (NERC); Swiss National Science Foundation; Swiss Polar Institute; Swiss Polar Institute (SPI); UK Natural Environment Research Council (NERC); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- SC0012704; SC0019251; SC0021017; SC0022046; SC0022163
- OSTI ID:
- 2564562
- Alternate ID(s):
- OSTI ID: 3012677
- Report Number(s):
- BNL--228073-2025-JAAM
- Journal Information:
- Elementa, Journal Name: Elementa Journal Issue: 1 Vol. 13; ISSN 2325-1026
- Publisher:
- University of California PressCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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Sun Sep 03 20:00:00 EDT 2023
· Nature Geoscience
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OSTI ID:1998013