期刊
GEOPHYSICAL RESEARCH LETTERS
卷 40, 期 14, 页码 3738-3743出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/grl.50661
关键词
marine gels; atmospheric nucleation; Arctic Ocean
资金
- Swedish Research Council
- Knut and Alice Wallenberg Foundation
- DAMOCLES European Union 6th Framework Program Integrated Research Project
- International Institute of Meteorology
The high Arctic (north of 80 degrees N) in summer is a region characterized by clean air and low abundances of preexisting particles. Marine colloidal nanogels i.e., assembled dissolved organic carbohydrate polymer networks have recently been confirmed to be present in both airborne particles and cloud water over the Arctic pack ice area. A novel route to atmospheric nanoparticles that appears to be operative in the high Arctic is suggested. It involves the injection of marine granular nanogels into the air from evaporating fog and cloud droplets, and is supported by observational and theoretical evidence obtained from a case study. Statistical analysis of the aerosol size distribution data recorded in the years 1991, 1996, 2001, and 2008 classified 75nanoparticle eventscovering 17% of the observed time periodas nanogel-type events, characterized by the spontaneous appearance of several distinct size bands below 200nm diameter.
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