The Relationship of Aerosol Properties and Ice‐Nucleating Particle Concentrations in Beijing

Ren, Yangze; Bi, Kai; Fu, Shilan; Tian, Ping; Huang, Mengyu; Zhu, Runkun; Xue, Huiting

doi:10.1029/2022jd037383

Cited by 3 publications

(1 citation statement)

References 90 publications

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“…Zhang's research also confirmed the negligible influence of anthropogenic black carbon and secondary aerosols emissions on INP concentrations [54]. However, Ren's results showed that the INP concentrations gradually increased as aerosol conditions transitioned from clean to heavy pollution [55]. Therefore, further investigations are still required to understand the INPs sources and its influencing factors in China.…”

Section: Introductionmentioning

confidence: 88%

The Vertical Distribution of Ice-Nucleating Particles over the North China Plain: A Case of Cold Front Passage

He,

Yin,

Huang

et al. 2023

Remote Sensing

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Ice-nucleating particles (INPs) are crucial for cloud freezing processes in the atmosphere. Given the limited knowledge about the vertical distribution of INPs and its relation to aerosols in China, we present two aircraft observations of INPs over the North China Plain on 23 October 2019 and 25 October 2019, before and after a cold front passage. We used a well-established method to identify the INPs on a silicon wafer and then performed single-particle chemical composition analysis using an environmental scanning electron microscope-energy dispersive spectrometer (ESEM-EDS). The INP concentrations range from 0.1 to 9.2 L−1 within activation temperatures from −20 to −29 °C. INPs are mostly concentrated within the boundary layer, and their concentration shows a decreasing trend with height (0.5~6 km) before the cold front passage. However, the highest INP concentration always appears at higher altitudes (4~5 km) after the cold front passage. The cold front passage also significantly weakens the correlations between the concentrations of INPs and aerosol particles at different sizes. The activated fraction (AF) of total aerosols increases from 10−6 to 10−4 with height from near ground to 6 km, reflecting a better nucleating capacity of the aerosols at higher altitudes. There is no obvious variation in AF after the cold front passage. Chemical analysis reveals that the INPs containing mineral dust components comprise the majority of total INPs during both flights. The proportion of pure mineral dust declines from 52.2% to 43.5% after the cold front passage while the proportion of mixed mineral dust increases from 23.9% to 45.7%, suggesting that an increased probability of aging or coating of INPs is introduced by the cold front during their long-distance transport. In addition, 88% of INPs have a diameter larger than 1 μm. This indicates that larger aerosols (>1 μm) are the major contributors to INPs at high altitudes despite their relatively low abundance. Our results demonstrate a significant impact of transport events on the sources and vertical distribution of INPs in the atmosphere.

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Section: Introductionmentioning

confidence: 88%

The Vertical Distribution of Ice-Nucleating Particles over the North China Plain: A Case of Cold Front Passage

He,

Yin,

Huang

et al. 2023

Remote Sensing

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Relation between ice nuclei particles concentration and aerosol counting at different sizes

López,

Palancar,

Bürgesser

2024

Atmospheric Research

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Measurement report: Atmospheric ice nuclei in the Changbai Mountains (2623 m a.s.l.) in northeastern Asia

Sun,

Zhu,

et al. 2024

Atmos. Chem. Phys.

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Abstract. Atmospheric ice nucleation plays an important role in modulating the global hydrological cycle and atmospheric radiation balance. To date, few comprehensive field observations of ice nuclei have been carried out at high-altitude sites, which are close to the height of mixed-phase cloud formation. In this study, we measured the concentration of ice-nucleating particles (INPs) in the immersion freezing mode at the summit of the Changbai Mountains (2623 m above sea level), northeast Asia, in summer 2021. The cumulative number concentration of INPs varied from 1.6 × 10−3 to 78.3 L−1 over the temperature range of −5.5 to −29.0 °C. Proteinaceous-based biological materials accounted for the majority of INPs, with the proportion of biological INPs (bio-INPs) exceeding 67 % across the entire freezing-temperature range, with this proportion even exceeding 90 % above −13.0 °C. At freezing temperatures ranging from −11.0 to −8.0 °C, bio-INPs were found to significantly correlate with wind speed (r = 0.5–0.8, p < 0.05) and Ca2+ (r = 0.6–0.9), and good but not significant correlation was found with isoprene (r = 0.6–0.7) and its oxidation products (isoprene × O3) (r = 0.7), suggesting that biological aerosols may attach to or mix with soil dust and contribute to INPs. During the daytime, bio-INPs showed a positive correlation with the planetary boundary layer (PBL) height at freezing temperatures ranging from −22.0 to −19.5 °C (r > 0.7, p < 0.05), with the valley breezes from southern mountainous regions also influencing the concentration of INPs. Moreover, the long-distance transport of air mass from the Japan Sea and South Korea significantly contributed to the high concentrations of bio-INPs. Our study emphasizes the important role of biological sources of INPs in the high-altitude atmosphere of northeastern Asia and the significant contribution of long-range transport to the INP concentrations in this region.

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The Relationship of Aerosol Properties and Ice‐Nucleating Particle Concentrations in Beijing

Abstract: Ice-nucleating particles (INPs) are required for the formation of primary ice at temperatures between −38°C and 0°C in the atmosphere. Observations have shown that dust particles can promote ice formation and lead to glaciation of midlevel clouds (

Cited by 3 publications

References 90 publications

The Vertical Distribution of Ice-Nucleating Particles over the North China Plain: A Case of Cold Front Passage

The Vertical Distribution of Ice-Nucleating Particles over the North China Plain: A Case of Cold Front Passage

Relation between ice nuclei particles concentration and aerosol counting at different sizes

Measurement report: Atmospheric ice nuclei in the Changbai Mountains (2623 m a.s.l.) in northeastern Asia

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