Secondary Formation of Aerosols Under Typical High‐Humidity Conditions in Wintertime Sichuan Basin, China: A Contrast to the North China Plain

Abstract

Severe haze episodes with large temporal and spatial coverages have occurred frequently in recent years in many regions of China (e.g., Beijing-Tianjin-Hebei, Pearl-River-Delta regions) (

Atmospheric Processing at the Sea‐Land Interface Over the South China Sea: Secondary Aerosol Formation, Aerosol Acidity, and Role of Sea Salts

“…Based on the SO 4 2− −NO 3 − −NH 4 + −Cl − −Na + −NH 3 −HCl−HNO 3 system and considering the contribution of organic matters, the mean aerosol pH and ALWC during the sampling period was modeled to be 1.63 ± 0.50 and 18.5 ± 14.5 μg m −3 , respectively. Compared with previous works, aerosol pH at this coastal site was much lower than those of urban areas such as Beijing (Ge et al., 2019; Song, Zhao, et al., 2018; Wang, Chen, et al., 2016), Tianjin (Shi et al., 2017), and Xi'an in North China (Wang, Chen, et al., 2016), Shanghai in Eastern China (Xu, Chen, Zhao, et al., 2020), Guangzhou and Shenzhen in South China (Jia et al., 2020; Wu et al., 2020), and Sichuan Basin in Western China (Wang et al., 2021), but close to that in Hong Kong, western United States, western Europe (Bougiatioti et al., 2016; Guo et al., 2017; Pathak et al., 2004; Weber et al., 2016; Xue et al., 2011) and a tropical coastal site in Bachok, Malaysia (Farren et al., 2019) (Table S2 in Supporting Information ).…”

Important Roles and Formation of Atmospheric Organosulfates in Marine Organic Aerosols: Influence of Phytoplankton Emissions and Anthropogenic Pollutants

“…The concentrations and chemical compositions of OSs in continental atmospheres have been examined and reported in urban, rural, suburban, and forest environments. ,− However, OSs in marine aerosols currently are rarely identified or quantified due to a lack of cruise observations. Limited marine atmosphere observations identified OSs derived from anthropogenic or biogenic VOCs, including over the China coastal seas, the Pacific Ocean, and the North Atlantic Ocean and in Arctic and Antarctic atmospheres. − Isoprene epoxydiol (IEPOX)-OS (or named methyltetrol sulfates at m / z 215) was observed over the Pacific Ocean and the Arctic Ocean, , and this compound group has been proven to be the most abundant OS species in continental atmospheres with high vegetation coverage and biogenic emissions .…”