收稿日期: 2013-07-08
修回日期: 2013-12-13
网络出版日期: 2014-05-15
基金资助
科技部公益性（气象）行业项目（GYHY201306042、GYHY201106050）、国家重点基础研究发展（973）计划（2011CB403400）和广东省科技计划项目（2010A030200012，2011A032100006，2012A061400012）资助
Impact of PM1 concentration on visibility and the aerosol hygroscopic growth factor in Guangzhou
Received date: 2013-07-08
Revised date: 2013-12-13
Online published: 2014-05-15
利用在线的气溶胶质量浓度与光学特性观测资料，对广州地区进行研究，得到下列3个结论.1）能见度与气溶胶质量浓度呈明显负相关关系.当PM1大于60 μg/m3时，随PM1质量浓度降低，能见度变化不明显；当PM1小于60μg/m3时，随PM1质量浓度降低，能见度迅速升高.2）相对湿度对能见度的影响很大.当相对湿度在70%～80%范围内时，只有当PM1的质量浓度小于40μg/m3，能见度才能达到10km；而当相对湿度为80%～85%，PM1的质量浓度必须小于20μg/m3，能见度才达到10km.3）气溶胶吸湿增长因子f（RH）与相对湿度之间存在下列关系式：f（RH）=0.6+0.133×（1－RH/100）－1.633，本地化的f（RH）与美国能见度观测网IMPROVE的湿度增长曲线在相对湿度为50%～80%之间具有可比性.
张芷言 , 王宝民 , 邓雪娇 , 谭浩波 , 李菲 , 邓涛 . 广州地区PM1质量浓度对能见度的影响以及气溶胶吸湿增长因子[J]. 中国科学院大学学报, 2014 , 31(3) : 397 -402 . DOI: 10.7523/j.issn.2095-6134.2014.03.015
On the basis of long-term dataset (including aerosol mass concentration,black carbon concentration, scattering coefficient, visibility and extinction coefficient), the study gives the following three conclusions. First, visibility is negatively correlated with aerosol mass concentration. When the PM1 mass concentration is greater than 60 μg/m3 visibility does not change significantly as the PM1 mass concentration decreases, and when the PM1 concentration is less than 60 μg/m3 visibility increases rapidly as the PM1 mass concentration decreases. Secondly, the relative humidity has a major influence on the visibility. Thirdly, in Guangzhou aerosol hygroscopic growth factor and relative humidity has the following relationship: f(RH)=0.6+0.133×(1－RH/100)－1.633. The local f(RH) is comparable to the growth curve of the IMPROVE with in the relative humidity range between 50% and 80%.
Key words： visibility; PM1; relative humidity; the aerosol hygroscopic growth factor
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