TY - JOUR
T1 - Differentiation of coarse-mode anthropogenic, marine and dust particles in the high Arctic islands of Svalbard
AU - Song, Congbo
AU - Dall’Osto, Manuel
AU - Lupi, Angelo
AU - Mazzola, Mauro
AU - Traversi, Rita
AU - Becagli, Silvia
AU - Gilardoni, Stefania
AU - Vratolis, Stergios
AU - Espen Yttri, Karl
AU - Beddows, David
AU - Schmale, Julia
AU - Brean, James
AU - Kramawijaya, Agung Ghani
AU - Harrison, Roy
AU - Shi, Zongbo
PY - 2021/7/28
Y1 - 2021/7/28
N2 - Understanding aerosol–cloud–climate interactions in the Arctic is key to predicting the climate in this rapidly changing region. Whilst many studies have focused on submicrometer aerosol (diameter less than 1 μm), relatively little is known about the supermicrometer aerosol (diameter above 1 μm). Here, we present a cluster analysis of multiyear (2015–2019) aerodynamic volume size distributions, with diameter ranging from 0.5 to 20 μm, measured continuously at the Gruvebadet Observatory in the Svalbard archipelago. Together with aerosol chemical composition data from several online and offline measurements, we apportioned the occurrence of the coarse-mode aerosols during the study period (mainly from March to October) to anthropogenic (two sources, 27%) and natural (three sources, 73%) origins. Specifically, two clusters are related to Arctic haze with high levels of black carbon, sulfate and accumulation mode (0.1–1 μm) aerosol. The first cluster (9%) is attributed to ammonium sulfate-rich Arctic haze particles, whereas the second one (18%) is attributed to larger-mode aerosol mixed with sea salt. The three natural aerosol clusters were openocean sea spray aerosol (3 %), mineral dust (7%) and an unidentified source of sea spray-related aerosol (32%). The results suggest that sea-spray-related aerosol in polar regions may be more complex than previously thought due to shortand long-distance origins and mixtures with Arctic haze, biogenic and likely blowing snow aerosols. Studying supermicrometer natural aerosol in the Arctic is imperative for understanding the impacts of changing natural processes on Arctic aerosol.
AB - Understanding aerosol–cloud–climate interactions in the Arctic is key to predicting the climate in this rapidly changing region. Whilst many studies have focused on submicrometer aerosol (diameter less than 1 μm), relatively little is known about the supermicrometer aerosol (diameter above 1 μm). Here, we present a cluster analysis of multiyear (2015–2019) aerodynamic volume size distributions, with diameter ranging from 0.5 to 20 μm, measured continuously at the Gruvebadet Observatory in the Svalbard archipelago. Together with aerosol chemical composition data from several online and offline measurements, we apportioned the occurrence of the coarse-mode aerosols during the study period (mainly from March to October) to anthropogenic (two sources, 27%) and natural (three sources, 73%) origins. Specifically, two clusters are related to Arctic haze with high levels of black carbon, sulfate and accumulation mode (0.1–1 μm) aerosol. The first cluster (9%) is attributed to ammonium sulfate-rich Arctic haze particles, whereas the second one (18%) is attributed to larger-mode aerosol mixed with sea salt. The three natural aerosol clusters were openocean sea spray aerosol (3 %), mineral dust (7%) and an unidentified source of sea spray-related aerosol (32%). The results suggest that sea-spray-related aerosol in polar regions may be more complex than previously thought due to shortand long-distance origins and mixtures with Arctic haze, biogenic and likely blowing snow aerosols. Studying supermicrometer natural aerosol in the Arctic is imperative for understanding the impacts of changing natural processes on Arctic aerosol.
UR - http://www.scopus.com/inward/record.url?scp=85111755157&partnerID=8YFLogxK
U2 - 10.5194/acp-21-11317-2021
DO - 10.5194/acp-21-11317-2021
M3 - Article
SN - 1680-7316
VL - 21
SP - 11317
EP - 11335
JO - Atmospheric Chemistry and Physics
JF - Atmospheric Chemistry and Physics
IS - 14
ER -