Predicting cloud condensation nuclei number concentration based on conventional measurements of aerosol properties in the North China Plain

Zhang, Yanyan; Tao, Jiangchuan; Ma, Nan; Kuang, Ye; Wang, Zhibin; Cheng, Peng; Xu, Wanyun; Yang, Wanqin; Zhang, Shaobin; Chun, Xiong; Dong, Wei; Xie, Lei; Sun, Yele; Fu, Pingqing; Zhou, Guangsheng; Cheng, Yafang; Su, Hang

doi:10.1016/j.scitotenv.2020.137473

Cited by 14 publications

(11 citation statements)

References 91 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The average NCCN at 0.1%, 0.2%, 0.4%, 0.7%, 0.9%, and 1.0% SS was about 2507, 4322, 5854, 6834, 7497, and 7862 cm -3 , respectively. The NCCN at 0.7% SS was lower than that measured (7900 cm -3 at 0.7% SS) in urban Guangzhou (Cai et al, 2018) and at a suburban site (14400 cm -3 at 0.864% SS) in the North China Plain (Zhang et al, 2020), but significantly higher than that measured at an urban site (2776 cm -3 at 0.68% SS) in São Paulo, Brazil (Almeida et al, 2014). The average AR at the above six SS was 0.20, 0.34, 0.45, 0.52, 0.57, and 0.60, respectively.…”

Section: )contrasting

confidence: 60%

Measurement Report: Distinct size dependence and diurnal variation of OA hygroscopicity, volatility, and CCN activity at a rural site in the Pearl River Delta (PRD) region, China

Cai

Huang

Liang

et al. 2022

Preprint

View full text Add to dashboard Cite

Abstract. Organic aerosol (OA) has a significant contribution to cloud formation and hence climate change. However, high uncertainties still exist in its impact on global climate, owing to the varying physical properties affected by the complex formation and aging processes. In this study, the hygroscopicity, volatility, cloud condensation nuclei (CCN) activity, and chemical composition of particles were measured using a series of online instruments at a rural site in the Pearl River Delta (PRD) region of China in Fall 2019. During the campaign, the average hygroscopicity of OA (κOA) increased from 0.058 at 30 nm to 0.09 at 200 nm, suggesting a higher oxidation state of OA at larger particle sizes, supported by a higher fraction of extremely low volatile OA (ELVOA) for larger size particles. Significantly different diurnal patterns of κOA were observed between Aitken mode and accumulation mode. For Aitken mode (30–100 nm), the κOA values showed daily minima (0.02–0.07) during daytime, while exhibited a daytime peak (~0.09) in the accumulation mode. Coincidently, a daytime peak was observed for both aged biomass burning organic aerosol (aBBOA) and less oxygenated organic aerosol (LOOA) based on source apportionment, which were attributed to the aging processes and gas-particle partitioning through photochemical reactions. In addition, the fraction of semi-volatile OA (SVOA) was higher at all measured sizes during daytime than during nighttime. These results indicate that the formation of secondary OA (SOA) through gas-particle partitioning can generally occur at all diameters, while the aging processes of pre-existing particles are more dominated in the accumulation mode. Furthermore, we found that applying a fixed κOA value (0.1) could lead to an overestimation of the CCN number concentration (NCCN) up to 12 %–19 % at 0.1 %–0.7 % supersaturation (SS), which was more obvious at higher SS during daytime. Better prediction of NCCN could be achieved by using size-resolved diurnal κOA, which indicates that the size-dependence and diurnal variations of κOA can strongly affect the NCCN at different SS. Our results highlight the need for accurately evaluating the atmospheric evolution of OA at different size ranges, and their impact on the physicochemical properties and hence climate effects.

show abstract

Section: )contrasting

confidence: 60%

Measurement Report: Distinct size dependence and diurnal variation of OA hygroscopicity, volatility, and CCN activity at a rural site in the Pearl River Delta (PRD) region, China

Cai

Huang

Liang

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…The average N CCN at 0.1 %, 0.2 %, 0.4 %, 0.7 %, 0.9 %, and 1.0 % SS was about 2507, 4322, 5854, 6834, 7497, and 7862 cm −3 , respectively. The N CCN at 0.7 % SS was lower than that measured (7900 cm −3 at 0.7 % SS) in urban Guangzhou (Cai et al, 2018) and at a suburban site (14 400 cm −3 at 0.864 % SS) in the North China Plain (Zhang et al, 2020) but significantly higher than that measured at an urban site (2776 cm −3 at 0.68 % SS) in São Paulo, Brazil (Almeida et al, 2014). The average AR at the above six SS values was 0.20, 0.34, 0.45, 0.52, 0.57, and 0.60.…”

Section: Overviewcontrasting

confidence: 58%

Measurement report: Distinct size dependence and diurnal variation in organic aerosol hygroscopicity, volatility, and cloud condensation nuclei activity at a rural site in the Pearl River Delta (PRD) region, China

Cai

Huang²,

Liang³

et al. 2022

Atmos. Chem. Phys.

View full text Add to dashboard Cite

Abstract. Organic aerosol (OA) has a significant contribution to cloud formation and hence climate change. However, high uncertainties still exist in its impact on global climate, owing to the varying physical properties affected by the complex formation and aging processes. In this study, the hygroscopicity, volatility, cloud condensation nuclei (CCN) activity, and chemical composition of particles were measured using a series of online instruments at a rural site in the Pearl River Delta (PRD) region of China in fall 2019. During the campaign, the average hygroscopicity of OA (κOA) increased from 0.058 at 30 nm to 0.09 at 200 nm, suggesting a higher oxidation state of OA at larger particle sizes, supported by a higher fraction of extremely low volatility OA (ELVOA) for larger size particles. Significantly different diurnal patterns of κOA were observed between Aitken mode particles and accumulation mode particles. For Aitken mode particles (30–100 nm), the κOA values showed daily minima (0.02–0.07) during daytime, while the accumulation mode exhibited a daytime peak (∼ 0.09). Coincidently, a daytime peak was observed for both aged biomass burning organic aerosol (aBBOA) and less oxygenated organic aerosol (LOOA) based on source apportionment, which was attributed to the aging processes and gas–particle partitioning through photochemical reactions. In addition, the fraction of semi-volatile OA (SVOA) was higher at all measured sizes during daytime than during nighttime. These results indicate that the formation of secondary OA (SOA) through gas–particle partitioning can generally occur at all diameters, while the aging processes of pre-existing particles are more dominated in the accumulation mode. Furthermore, we found that applying a fixed κOA value (0.1) could lead to an overestimation of the CCN number concentration (NCCN) up to 12 %–19 % at 0.1 %–0.7 % supersaturation (SS), which was more obvious at higher SS during daytime. Better prediction of NCCN could be achieved by using size-resolved diurnal κOA, which indicates that the size dependence and diurnal variations in κOA can strongly affect the NCCN at different SS values. Our results highlight the need for accurately evaluating the atmospheric evolution of OA at different size ranges and their impact on the physicochemical properties and hence climate effects.

show abstract

“…Similar phenomenon has been reported in another study at the same site during winter time. 26 At larger SS values, particle size tends to be more crucial in affecting N CCN . 27 The lower N CCN during daytime was likely caused by the varied particle number size distribution (see Fig.…”

Section: Impact Of Multiphase Processes On Aerosol Physical Propertiesmentioning

confidence: 97%

Multiphase chemistry experiment in Fogs and Aerosols in the North China Plain (McFAN): integrated analysis and intensive winter campaign 2018

Guo

et al. 2021

Faraday Discuss.

Self Cite

View full text Add to dashboard Cite

show abstract

Predicting cloud condensation nuclei number concentration based on conventional measurements of aerosol properties in the North China Plain

Cited by 14 publications

References 91 publications

Measurement Report: Distinct size dependence and diurnal variation of OA hygroscopicity, volatility, and CCN activity at a rural site in the Pearl River Delta (PRD) region, China

Measurement Report: Distinct size dependence and diurnal variation of OA hygroscopicity, volatility, and CCN activity at a rural site in the Pearl River Delta (PRD) region, China

Measurement report: Distinct size dependence and diurnal variation in organic aerosol hygroscopicity, volatility, and cloud condensation nuclei activity at a rural site in the Pearl River Delta (PRD) region, China

Multiphase chemistry experiment in Fogs and Aerosols in the North China Plain (McFAN): integrated analysis and intensive winter campaign 2018

Contact Info

Product

Resources

About