Impact of sea ice on the physicochemical characteristics of marine aerosols in the Arctic Ocean

• Published in: The Science of the total environment 2024-11, Vol.949, p.175135, Article 175135
• Main Authors: Wang, Shanshan, Jiao, Liping, Yan, Jinpei, Zhao, Shuhui, Tian, Rong, Sun, Xia, Dai, Siying, Zhang, Xiaoke, Zhang, Miming
• Format: Article
• Language: English
• Subjects: Floating ice region; High resolution; Marine biogenic aerosol; Sea salt aerosol; Seawater region; Shipborne navigation observation
• ISSN: 0048-9697; 1879-1026; 1879-1026
• DOI: 10.1016/j.scitotenv.2024.175135

Marine aerosols (MA) can be influenced by sea ice concentration, potentially playing a pivotal role in the formation of cloud condensation nuclei and exerting an impact on regional climate. In this study, a high-resolution aerosol observation system was employed to measure the concentration and size of aerosols in the floating ice region and seawater region of the Arctic Ocean during the 8th and 9th Chinese Arctic Expedition Research Cruise. The identification of aerosol sources was conducted using a modified positive definite matrix factorization method and a backward air mass trajectory model. Two types of MA including the sea-salt aerosol (SSA) and the marine biogenic aerosol (BA) were identified and their concentrations were calculated. Then the physical-chemical characteristics of MA in the floating ice region and seawater region were compared under normalized conditions (−2.5 °C