河北中南部不同天气条件下气溶胶的航测研究

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Abstract This study analysed the spatial distribution of atmospheric aerosol properties under different weather conditions over both central and southern regions of Hebei province in autumn 2008, based on in-situ observations of aerosols from the Particle Measurement System (PMS) along with the back trajectories from HYSPLIT model. It showed that there were significant differences in the vertical distribution of aerosol concentration and aerosol particle size distribution under different weather patterns. Various factors were found to have an impact on the spatial distribution of aerosol concentration, including the mixed-layer height, relative humidity, cloud distribution, and aerosol sources. The number concentration of aerosol ranged from 904.4 to 3005.0 cm^-3 near the ground during the observation period. The maximum aerosol number concentration near the ground was found in a cloudy day, and the minimum in a clear day. The aerosol particle size distribution function (PDF) was greatly affected by atmospheric stability, inversion layer, and the distribution of cloud region. The aerosol PDF showed a bimodal or even multimodal pattern primarily due to the existence of inversion layer. The particle size value with the peak frequency shifted to a bigger value due to the hygroscopic growth of aerosol particles in clouds. The spectrum width of aerosol PDF was narrower outside than inside clouds. The aerosol PDF spectrum width was narrower with a smaller peak frequency particle size at high than low altitudes due to the effect of aerosol particle's gravitational settlement.

Key words： aerosol number concentration particle size distribution central and southern Hebei airplane observation

Received: 27 May 2017

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	Articles by authors
	HU Xiang-feng
	SUN Yun
	LI Er-jie
	FAN Gen-chang

Cite this article:

HU Xiang-feng,SUN Yun,LI Er-jie等. Observational study of aerosol in central and southern Hebei under different weather conditions[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(12): 4442-4451.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2017/V37/I12/4442

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