Aerosol hygroscopicity and its impact on atmospheric visibility and   radiative forcing in Guangzhou during the 2006 PRIDE-PRD campaign

doi:10.1016/j.atmosenv.2012.06.016

CORC > 北京大学 > 环境科学与工程学院

	Aerosol hygroscopicity and its impact on atmospheric visibility and radiative forcing in Guangzhou during the 2006 PRIDE-PRD campaign
	Liu, Xingang ; Zhang, Yuanhang ; Cheng, Yafang ; Hu, Min ; Han, Tingting
刊名	大气环境
	2012
关键词	Aerosol hygroscopicity Visibility impairment Radiative forcing PRIDE-PRD campaign PEARL RIVER-DELTA SURFACE BOUNDARY-LAYER RELATIVE-HUMIDITY OPTICAL-PROPERTIES ACE-ASIA SCATTERING GROWTH PARTICLES
DOI	10.1016/j.atmosenv.2012.06.016
英文摘要	The objective of this study is to quantify the relation of aerosol chemical compositions and optical properties, and to assess the impact of relative humidity (RH) on atmospheric visibility and aerosol direct radiative forcing (ADRF). Mass concentration and size distribution of aerosol chemical compositions as well as aerosol optical properties were concurrently measured at Guangzhou urban site during the PRD (Pearl River Delta) campaign from 1 to 31 July, 2006. Gaseous pollutant NO2 and meteorological parameter were simultaneously monitored. Compared with its dry condition, atmospheric ambient extinction coefficient sigma(ext)(RH) averagely increased about 51% and atmospheric visibility deceased about 35%, among which RH played an important role on the optical properties of water soluble inorganic salts. (NH4)(2)SO4 is the most important component responsible for visibility degradation at Guangzhou. In addition, the asymmetry factor g increased from 0.64 to 0.74 with the up-scatter fraction beta decreasing from 0.24 to 0.19 when RH increasing from 40% to 90%. At 80% RH, the ADRF increased about 280% compared to that at dry condition and it averagely increased about 100% during the campaign under ambient conditions. It can be inferred that aerosol water content is a key factor and could not be ignored in assessing the role of aerosols in visibility impairment and radiative forcing, especially in the regions with high RH. (c) 2012 Elsevier Ltd. All rights reserved.; Environmental Sciences; Meteorology & Atmospheric Sciences; SCI(E); EI; 16; ARTICLE; 59-67; 60
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/158350]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Liu, Xingang,Zhang, Yuanhang,Cheng, Yafang,et al. Aerosol hygroscopicity and its impact on atmospheric visibility and radiative forcing in Guangzhou during the 2006 PRIDE-PRD campaign[J]. 大气环境,2012.
APA	Liu, Xingang,Zhang, Yuanhang,Cheng, Yafang,Hu, Min,&Han, Tingting.(2012).Aerosol hygroscopicity and its impact on atmospheric visibility and radiative forcing in Guangzhou during the 2006 PRIDE-PRD campaign.大气环境.
MLA	Liu, Xingang,et al."Aerosol hygroscopicity and its impact on atmospheric visibility and radiative forcing in Guangzhou during the 2006 PRIDE-PRD campaign".大气环境 (2012).