Large Summer Contribution of Organic Biogenic Aerosols to Arctic Cloud Condensation Nuclei

• Published in: Geophysical Research Letters
• Main Authors: Lange, R., Dall'Osto, Manuel, Wex, Heike, Massling, Andreas
• Other Authors: Agencia Estatal de Investigación (España), Danish Environmental Protection Agency, Danish Council for Independent Research, Nordic Centre of Excellence (Norway), Villum Fonden, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España)
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: American Geophysical Union 2019
• Subjects: Arctic; Greenland; Station Nord; AMAP; Arctic monitoring and assessment program; black carbon
• Online Access: http://hdl.handle.net/10261/197634; https://doi.org/10.1029/2019GL084142; https://doi.org/10.13039/501100011033; https://doi.org/10.13039/100008398; https://doi.org/10.13039/501100003329

10 pages, 3 figures, supporting information https://doi.org/10.1029/2019GL084142.-- Data are available in the main text and the supporting information and in the website (https://nuvol.cmima.csic.es/owncloud/s/w0Fq4kIKC0pAOJo/download) A k‐means cluster analysis of a 5‐year aerosol particle size distribution data set from northeast Greenland is combined with measurements of coincident shorter field studies of aerosol equivalent black carbon (eBC) content, hygroscopic growth factor (HGF), and cloud condensation nuclei (CCN) concentrations. This led to five clusters strongly controlled by natural emissions (eBC 8–15 ng/m3) and three anthropogenic clusters with larger particle concentrations in the accumulation mode (eBC 29–77 ng/m3). The HGF and CCN properties of the eight aerosol clusters differ drastically. Anthropogenic clusters feature high growth factors (1.62–1.81) and low CCN κ values (0.10–0.46), while natural clusters show lower HGF (1.38–1.70) but remarkably higher κ values (0.35–0.51). Extrapolating the CCN properties on the basis of the cluster analysis to annual timescales suggests that biogenic organic aerosol may drive Arctic aerosol production during summer This study was founded by the Danish Environmental Protection Agency (MIKA/DANCEA funds for Environmental Support to the Arctic Region) and “Arctic Monitoring and Assessment Program” (AMAP), the Danish research project “Short lived Climate Forcers” (SLCF), and the Danish Council for Independent Research (Project NUMEN, DFF‐FTP‐4005‐00485B), the Nordic Centre of Excellence (NCoE) Cryosphere‐Atmosphere Interactions in a Changing Arctic Climate (CRAICC), and the Villum Foundation. Special thanks for staff at Station Nord. Dr. Dall'Osto was funded by the Spanish Ministry of Economy (PI‐ICE‐CTM2017-89117‐R and RYC‐2012‐11922) Peer Reviewed