Full
Outline
Based on the observation of particulate matter concentration in Shenzhen from October to December 2022, the characteristics and influencing factors of New Particle Formation (NPF) events in autumn and winter in Shenzhen were explored. During the observation period, the average particulate matter concentration on non-NPF days was measured as 1.09×104 #/cm3, and on NPF days, it was measured as 1.57×104 #/cm3. The overall particulate matter concentration on non-NPF days was found to be lower than that on NPF days. The Shenzhen NPF event was characterized by low particle formation rate, low growth rate, and low condensation sink, which were consistent with clean and coastal areas both domestically and internationally. By using the standard of whether the mean condensation concentration during the time before dawn to early morning period was greater than 0.02s-1, NPF days were further classified into clean and polluted backgrounds. It was observed that the significant increase in boundary layer uplift and wind speed during the daytime created favorable conditions for NPF under polluted backgrounds. Under polluted backgrounds, NPF days were associated with stronger solar radiation compared to clean backgrounds. It was concluded that active photochemical reactions were the main driving force of the autumn and winter NPF events in Shenzhen. High temperatures, strong solar radiation, and low humidity were identified as factors controlling the formation of new particles, while high condensation and low wind speeds were found to control the loss of new particles.
68
15
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
