Physical and Chemical Characteristics of Atmospheric Particles in Autumn in Mt. Huangshan

BIAN Yi-shu1 YIN Yan1 WANG Hong-lei1 CHEN Kui1

(1.Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, Jiangsu Province, China 210044)
【Knowledge Link】air mass

【Abstract】For the research on physical and chemical characteristics of single-particle aerosols in the background area of east China, a single-particle time-of-flight mass spectrometer (SPAMS) was used to observe the atmospheric particles in Mt. Huangshan from September 5, 2012 to October 28, 2012 and explore the influence of different air masses on the types and proportions of particles in combination with the HYSPLIT backward trajectory model. The results showed that the particles in Mt. Huangshan area can be divided into nine categories: Aged-EC, K, ECOC, OC, NaK, EC, ECHM, HM, and Minerals. Aged-EC accounted for the highest proportion, followed by K, and the carbonaceous particles were seriously aged. The carbonaceous particle sizes of Aged-EC, ECOC, and OC were concentrated in the accumulation mode (0.2–1.4 μm), whereas those of HM, NaK, and Minerals were concentrated in the coarse particle mode (> 1.4 μm). Apart from K, ECHM, and ECOC, higher wind speed was unfavorable to the accumulation of particles. A higher relative humidity led to higher proportion of carbonaceous particles and smaller proportions of K, OC, Minerals, and NaK. Cluster analysis results showed that the Mt. Huangshan area was mainly affected by northwest air mass, marine air mass, and local air mass. Industrial emissions and coal-burning activities in the surrounding areas were the primary contribution sources of Aged-EC.

【Keywords】 single-particle time-of-flight mass spectrometer; Mt. Huangshan; size distribution; mass spectral characteristics; backward trajectory;

【DOI】

【Funds】 National Natural Science Foundation of China (91644224, 41805096, 41575132)

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This Article

ISSN:0250-3301

CN:11-1895/X

Vol 41, No. 03, Pages 1056-1066

March 2020

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Abstract

  • 1 Materials and methods
  • 2 Results and discussion
  • 3 Conclusions
  • References