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

被引：80

作者：

Chen, Jie ^{[1
]}

Wu, Zhijun ^{[1
]}

Augustin-Bauditz, Stefanie ^{[2
]}

Grawe, Sarah ^{[2
]}

Hartmann, Markus ^{[2
]}

Pei, Xiangyu ^{[3
]}

Liu, Zirui ^{[4
]}

Ji, Dongsheng ^{[4
]}

Wex, Heike ^{[2
]}

机构：

[1] Peking Univ, Coll Environm Sci & Engn, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100871, Peoples R China

[2] Leibniz Inst Tropospher Res, D-04318 Leipzig, Germany

[3] Univ Gothenburg, Dept Chem & Mol Biol, S-41296 Gothenburg, Sweden

[4] Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China

来源：

ATMOSPHERIC CHEMISTRY AND PHYSICS | 2018年 / 18卷 / 05期

基金：

瑞典研究理事会; 中国国家自然科学基金;

关键词：

MIXED-PHASE CLOUDS; MINERAL DUST; ASH PARTICLES; BLACK CARBON; NUCLEI; AEROSOLS; DIESEL; DISTRIBUTIONS; TEMPERATURE; ABSORPTION;

D O I：

10.5194/acp-18-3523-2018

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Exceedingly high levels of PM2.5 with complex chemical composition occur frequently in China. It has been speculated whether anthropogenic PM2.5 may significantly contribute to ice-nucleating particles (INP). However, few studies have focused on the ice-nucleating properties of urban particles. In this work, two ice-nucleating droplet arrays have been used to determine the atmospheric number concentration of INP (N-INP) in the range from 6 to 25 degrees C in Beijing. No correlations between N-INP and either PM2.5 or black carbon mass concentrations were found, although both varied by more than a factor of 30 during the sampling period. Similarly, there were no correlations between N-INP and either total particle number concentration or number concentrations for particles with diameters > 500 nm. Furthermore, there was no clear difference between day and night samples. All these results indicate that Beijing air pollution did not increase or decrease INP concentrations in the examined temperature range above values observed in nonurban areas; hence, the background INP concentrations might not be anthropogenically influenced as far as urban air pollution is concerned, at least in the examined temperature range.

引用

页码：3523 / 3539

页数：17

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