| Title: | Aerosol Liquid Water Promotes the Formation of Water-Soluble Organic Nitrogen in Submicrometer Aerosols in a Suburban Forest |
| Author(s): | Xu Y; Miyazaki Y; Tachibana E; Sato K; Ramasamy S; Mochizuki T; Sadanaga Y; Nakashima Y; Sakamoto Y; Matsuda K; Kajii Y; |
| Address: | "Institute of Low Temperature Science , Hokkaido University , Sapporo 060-0819 , Japan. National Institute for Environmental Studies , Onogawa , Tsukuba , Ibaraki 305-5506 , Japan. Graduate School of Global Environmental Studies , Kyoto University , Nihonmatsucho, Sakyo-ku , Kyoto 606-8501 , Japan. Department of Applied Chemistry , Osaka Prefecture University , Sakai 599-8531 , Japan. Department of Environmental Science on Biosphere , Tokyo University of Agriculture and Technology , Tokyo 183-8509 , Japan. Graduate School of Human and Environmental Studies , Kyoto University , Nihonmatsucho, Sakyo-ku , Kyoto 606-8501 , Japan" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Water-soluble organic nitrogen (WSON) affects the formation, chemical transformations, hygroscopicity, and acidity of organic aerosols as well as biogeochemical cycles of nitrogen. However, large uncertainties exist in the origins and formation processes of WSON. Submicrometer aerosol particles were collected at a suburban forest site in Tokyo in summer 2015 to investigate the relative impacts of anthropogenic and biogenic sources on WSON formations and their linkages with aerosol liquid water (ALW). The concentrations of WSON (ave. 225 +/- 100 ngN m(-3)) and ALW exhibited peaks during nighttime, which showed a significant positive correlation, suggesting that ALW significantly contributed to WSON formation. Further, the thermodynamic predictions by ISORROPIA-II suggest that ALW was primarily driven by anthropogenic sulfate. Our analysis, including positive matrix factorization, suggests that aqueous-phase reactions of ammonium and reactive nitrogen with biogenic volatile organic compounds (VOCs) play a key role in WSON formation in submicrometer particles, which is particularly significant in nighttime, at the suburban forest site. The formation of WSON associated with biogenic VOCs and ALW was partly supported by the molecular characterization of WSON. The overall result suggests that ALW is an important driver for the formation of aerosol WSON through a combination of anthropogenic and biogenic sources" |
| Keywords: | Aerosols *Air Pollutants Forests Nitrogen *Volatile Organic Compounds Water; |
| Notes: | "MedlineXu, Yu Miyazaki, Yuzo Tachibana, Eri Sato, Kei Ramasamy, Sathiyamurthi Mochizuki, Tomoki Sadanaga, Yasuhiro Nakashima, Yoshihiro Sakamoto, Yosuke Matsuda, Kazuhide Kajii, Yoshizumi eng Research Support, Non-U.S. Gov't 2020/01/09 Environ Sci Technol. 2020 Feb 4; 54(3):1406-1414. doi: 10.1021/acs.est.9b05849. Epub 2020 Jan 21" |
