The Observation of Ice-Nucleating Particles Active at Temperatures above–15°C and Its Implication on Ice Formation in Clouds

Bi, Kai; Ma, Xiaojun; Chen, Yunbo; Fu, Shizuo; Han, Xue

doi:10.1007/s13351-018-7181-z

Cited by 7 publications

(2 citation statements)

References 40 publications

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“…China, despite being the most populous country and a major source of the global atmospheric aerosol burden, has seen only a handful of in situ INP measurements in recent years (Bi et al, ; Chen et al, ; Jiang et al, ; ; ; Jinfang et al, ; Li et al, ; Rosinski et al, ; Yang et al, ; You et al, ; You & Shi, ). China is a challenging environment for disentangling INP sources due to the complex composition of aerosol in many locations, with influence from both anthropogenic sources, including pollution including combustion and road dust, and agricultural (tilling and harvesting), as well as seasonal influence from natural sources, such as mineral dust.…”

Section: Introductionmentioning

confidence: 99%

Measurements of Ice Nucleating Particles in Beijing, China

McMeeking

Ding

et al. 2019

JGR Atmospheres

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Heterogeneous ice nucleating particle (INP) concentrations are reported for a site on the eastern margin of Beijing, China, during the period 4 May to 4 June 2018. INP concentrations were measured continuously at −20, −25, and −30 °C in a repeating cycle by a newly developed, automated continuous flow diffusion chamber, and reached concentrations as high as 2800 sL−1 during dust‐impacted periods. Study average concentrations were 70 ± 70, 230 ± 290, and 430 ± 500 sL−1 at −20, −25, and −30 °C. There was no clear relationship between pollution periods, identified based on fine‐mode particle concentration increases, and INP concentrations or characteristics. Other anthropogenic emissions, such as non‐combustion industrial or agricultural activities play an unresolved role.

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Section: Introductionmentioning

confidence: 99%

Measurements of Ice Nucleating Particles in Beijing, China

McMeeking

Ding

et al. 2019

JGR Atmospheres

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“…Observations in mountainous areas indicated that mineral dust is the most effective INP in spring, while anthropogenic aerosol pollution has a limited contribution [51]. Winter observations in Beijing revealed that the mountainous region exhibits a higher abundance of INPs that can be activated at higher temperatures compared to the central urban region [52]. Summer observations in Beijing indicated that INP concentrations in the atmosphere did not show a clear trend of increase or decrease during the pollution events [53].…”

Section: Introductionmentioning

confidence: 99%

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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Simulation Study of Cloud Properties Affected by Heterogeneous Nucleation Using the GRAPES_SCM during the TWP-ICE Campaign

Liu

et al. 2019

J Meteorol Res

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The Observation of Ice-Nucleating Particles Active at Temperatures above–15°C and Its Implication on Ice Formation in Clouds

Cited by 7 publications

References 40 publications

Measurements of Ice Nucleating Particles in Beijing, China

Measurements of Ice Nucleating Particles in Beijing, China

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

Simulation Study of Cloud Properties Affected by Heterogeneous Nucleation Using the GRAPES_SCM during the TWP-ICE Campaign

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