Secondary Production of Organic Aerosols from Biogenic VOCs over Mt. Fuji, Japan

详细信息    查看全文

• 作者：Pingqing Fu ; Kimitaka Kawamura ; Jing Chen ; Yuzo Miyazaki
• 刊名：Environmental Science & Technology
• 出版年：2014
• 出版时间：August 5, 2014
• 年：2014
• 卷：48
• 期：15
• 页码：8491-8497
• 全文大小：320K
• ISSN：1520-5851

文摘

We investigated organic molecular compositions of summertime aerosols collected at the summit of Mt. Fuji (3776 m a.s.l.) in July鈥揂ugust 2009. More than 120 organic species were identified using GC/MS. Concentrations of both primary and secondary organic aerosol (SOA) tracers in whole-day samples were 4鈥?0 times higher than those in nighttime samples, suggesting that valley breeze is an efficient mechanism to uplift the aerosols and precursors from the ground surface to mountaintop in daytime. Using a tracer-based method, we estimated the concentrations of secondary organic carbon (SOC) derived from isoprene, 伪/尾-pinene, and 尾-caryophyllene to be 2.2鈥?1.2 ngC m^鈥? in nighttime and 227鈥?120 ngC m^鈥? during whole-day. These biogenic SOCs correspond to 0.80鈥?1.9% and 26.8鈥?7.4% of aerosol organic carbon in nighttime and whole-day samples, respectively. This study demonstrates that biogenic SOA, which is controlled by the valley breeze, is a significant fraction of free tropospheric aerosols over Mt. Fuji in summer.