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Measurements of Ice Nucleating Particles in Beijing, China
Author(s) -
Bi K.,
McMeeking G. R.,
Ding D. P.,
Levin E. J. T.,
DeMott P. J.,
Zhao D. L.,
Wang F.,
Liu Q.,
Tian P.,
Ma X. C.,
Chen Y. B.,
Huang M. Y.,
Zhang H. L.,
Gordon T. D.,
Chen P.
Publication year - 2019
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
eISSN - 2169-8996
pISSN - 2169-897X
DOI - 10.1029/2019jd030609
Subject(s) - beijing , environmental science , particle (ecology) , ice nucleus , china , atmospheric sciences , pollution , environmental chemistry , nucleation , physical geography , chemistry , geography , oceanography , geology , archaeology , ecology , organic chemistry , biology
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.