Size-separated aerosol chemical characterization over Ny-Ålesund during the Arctic summer of 2010

Chemical composition of aerosols is of great concern in the Arctic because of its great influence on climate. In this communication, we report the physico-chemical properties of size-separated aerosol data archived at Gruvebadet lab in Ny-Ålesund (78.55°S, 11.55°E) as a part of the Indian Arctic Mis...

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Bibliographic Details
Published in:Sustainable Chemistry for Climate Action
Main Authors: Sunil M. Sonbawne, M.P. Raju, P.D. Safai, P.C.S. Devara, Suvarna Fadnavis, A.S. Panicker, G. Pandithurai
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2023
Subjects:
Indian arctic station (Himadri)
Aerosol size distribution
Size-mode and ionic constituents
Chemical composition
Source contribution
Airmass trajectories
Chemistry
QD1-999
Environmental protection
TD169-171.8
Arctic
Canada
Greenland
Indian
Ny-Ålesund
black carbon
Ny Ålesund
Online Access:https://doi.org/10.1016/j.scca.2023.100016
https://doaj.org/article/49477476f98749dda3fce43029593686
Description
Summary:Chemical composition of aerosols is of great concern in the Arctic because of its great influence on climate. In this communication, we report the physico-chemical properties of size-separated aerosol data archived at Gruvebadet lab in Ny-Ålesund (78.55°S, 11.55°E) as a part of the Indian Arctic Mission over the station ''Himadri'' in 2010. The results reveal that the mass-size distribution (MSD) of aerosol composition exhibits tri-modal distribution with coarse-mode (62%), fine-mode (32%) and weak nucleation-mode (6%) indicating dominance of natural sources over the study region. MSD of chemical components showed a significant contribution to coarse-mode particles for Ca2+, Mg2+, Na+ and Cl−; fine-mode particles for SO42−, NO3−, NH4+ and K+. The marine sources contributed maximum for SO42− (89%) and Mg2+ (44%) in the coarse fraction, and in the fine fraction, 31% to SO42− and 86% to Mg2+. Non-marine sources were major contributors (80 to 95%) in both mode fractions for Ca2+and K+. The estimated aerosol radiative forcing in the atmosphere of ∼3.21 W/m2 could be attributed to the loading of black carbon aerosols (62%) over the site. The backward trajectories show air masses from Canada and Greenland travelling from 6000 m elevation, bringing the pollutants to Ny-Ålesund and lower altitudes; the oceanic region within Arctic circle contributes more.

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