Ice nucleating particle concentrations unaffected by urban air pollution in Beijing, China

Chen, Jie; Wu, Zhijun; Augustin-Bauditz, Stefanie; Grawe, Sarah; Hartmann, Markus; Pei, Xiangyu; Liu, Zirui; Ji, Dongsheng; Wex, Heike

doi:10.5194/acp-2017-884

Cited by 4 publications

(12 citation statements)

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“…INP concentrations at all temperatures were much higher than values previously observed in other continental regions using the same methods (e.g., Richardson et al, ; DeMott et al, , ; Tobo et al, in North America; Boose et al, ; Lacher et al, in Europe), and at the upper bounds of data reported previously in transported dust plumes (e.g., Boose et al, ; DeMott et al, ; Price et al, ). Concentrations were also higher compared to recently reported measurements in Beijing (Chen et al, ); however there are several potential reasons for this difference. The results from Chen et al () are for winter when dust impact is minimal, and closer to the city center, so different local sources likely affect the two sites, especially agricultural and manufacturing‐associated emissions near the CLOUD Base.…”

Section: Resultsmentioning

confidence: 99%

“…Concentrations were also higher compared to recently reported measurements in Beijing (Chen et al, ); however there are several potential reasons for this difference. The results from Chen et al () are for winter when dust impact is minimal, and closer to the city center, so different local sources likely affect the two sites, especially agricultural and manufacturing‐associated emissions near the CLOUD Base. The Chen et al () measurements also cover warmer temperatures than most of our measurements.…”

Section: Resultsmentioning

confidence: 99%

“…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%

“…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. Chen et al () found no correlations between INP concentrations and PM 2.5 , black carbon mass or particle number concentrations in Beijing in winter despite large variations during the study period. They concluded that Beijing air pollution did not increase or decrease INP concentrations, suggesting a lack of anthropogenic influence, at least from air pollution.…”

Section: Introductionmentioning

confidence: 99%

“…Technical issues can hinder obtaining high‐quality INP measurements over a wide‐range of temperatures and saturation conditions relevant to mixed‐phase clouds. Existing data from China, for example, are based on either off‐line measurement of extracts from filters (e.g., Chen et al, ) or Bigg type mixing cloud chambers (Bigg, ; Yang et al, ), which can be labor intensive, especially for long measurement periods and generally have poor time resolution. An alternative to these approaches is continuous flow or portable chambers but these can also be labor intensive for longer measurement periods and suffer from sensitivity limitations.…”

Section: Introductionmentioning

confidence: 99%

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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: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Measurements of Ice Nucleating Particles in Beijing, China

McMeeking

Ding

et al. 2019

JGR Atmospheres

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Characterization of Ice‐Nucleating Particles Over Northern India

et al. 2019

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The sources and concentrations of ice‐nucleating particles (INPs) over India are not well known. Here, INP concentrations in rainwater from Northern India and a dust sample from the Thar Desert are characterized. Rainwater INP concentrations ranged between 104 and 3 × 107 L−1 water, spanning temperatures between −4 and −28 °C. During the monsoon season, INP concentrations were low and approached those in remote marine air mass. During the winter season, INPs active between −4 to −10 °C were occasionally observed. An increase in INP activity sometimes occurred after the initial onset of rain. The onset freezing temperature of samples active at warmer temperatures was shifted to colder temperature after heat treatment, suggesting that the INP activity stemmed from biological influence. Plating was used to isolate and sequence INP active bacterial strains from some of the rainwater samples, specifically strains of close taxonomic affiliation with the ice nucleating genera Pantoea. The size‐resolved ice nucleation active site density for 200–600‐nm particles of Thar Desert Dust ranged between 107 and 109 m−2 at −20 °C, values similar to dusts from other regions of the world. The data reported herein may help constrain models that seek to predict the impact of INP on the properties of mixed‐phased clouds over the Indian subcontinent.

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Characteristics of Ice Nucleating Particles in and Around California Winter Storms

et al. 2019

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A major component of California's yearly precipitation comes from wintertime atmospheric river events which bring large amounts of moisture from the tropics up to the midlatitudes. Understanding these systems, specifically the effects of aerosol particles on precipitation associated with these storms, was a major focus of the 2015 Atmospheric Radiation Measurement Cloud Aerosol Precipitation Experiment, which was part of the wintertime California Water 2015 campaign. The measurement campaign provided sampling platforms on four aircraft, including the Atmospheric Radiation Measurement Aerial Facility G‐1, as well as the National Oceanic and Atmospheric Administration Ronald H. Brown research vessel and at a ground station in Bodega Bay, CA. Measurements of ice nucleating particles (INPs) were made with the Colorado State University Continuous Flow Diffusion Chamber aboard the G‐1, and aerosol filters were collected on the G‐1, at the Bodega Bay site and on the Ronald H. Brown for postprocessing via immersion freezing in the Colorado State University Ice Spectrometer. Aerosol composition was measured aboard the G‐1 with the Aerosol Time‐of‐Flight Mass Spectrometer. Here we present INP concentrations and aerosol chemical compositions during the course of the aircraft campaign. During the atmospheric river event, we found that marine aerosol was the main aerosol type and that marine INPs were dominant at cloud activation temperatures, which is in stark contrast to the dominance of dust INPs during the atmospheric river events in the California Water 2011 campaign.

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Ice nucleating particle concentrations unaffected by urban air pollution in Beijing, China

Cited by 4 publications

References 1 publication

Measurements of Ice Nucleating Particles in Beijing, China

Measurements of Ice Nucleating Particles in Beijing, China

Characterization of Ice‐Nucleating Particles Over Northern India

Characteristics of Ice Nucleating Particles in and Around California Winter Storms

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