Effects of hygroscopicity on aerosol optical properties and direct radiative forcing in Beijing: Based on two-year observations

单次散射反照率 气溶胶 辐射压力 埃指数 大气科学 辐射传输 反照率(炼金术) 散射 相对湿度 环境科学 矿物粉尘 化学 气象学 物理 光学 艺术 表演艺术 艺术史
作者
Can Xia,Junying Sun,Xinyao Hu,Xiaojing Shen,Yangmei Zhang,Sinan Zhang,Jialing Wang,Quan Liu,Jiayuan Lu,Shuo Liu,Xiaoye Zhang
出处
期刊:Science of The Total Environment [Elsevier BV]
卷期号:857: 159233-159233 被引量:2
标识
DOI:10.1016/j.scitotenv.2022.159233
摘要

The influence of relative humidity on aerosol properties and the direct radiative forcing of PM10 and PM1 were investigated in Beijing from January 2018 to December 2019. The annual mean scattering hygroscopic growth factor at RH = 80 % [f(80 %)] of PM10 and PM1 were 1.60 ± 0.24 and 1.58 ± 0.22, respectively. The variation of aerosol hygroscopic growth factors of PM10 and PM1 aerosols was similar, which is mainly due to the fact that aerosol scattering in Beijing is dominated by fine particles. The seasonal mean f(80 %) of PM10 from spring to winter were 1.66 ± 0.23, 1.71 ± 0.25, 1.51 ± 0.20, 1.49 ± 0.16, respectively, which were higher in spring and summer, and lower in autumn and winter. The diurnal variation of f(80 %) was relatively higher from 12:00 to 18:00, which could be related to the formation of secondary aerosols by photochemical reactions. f(80 %) shows a strong positive relationship with both the scattering Angström exponent (SAE) and the single scattering albedo (ω0) under dry conditions; therefore, the scattering hygroscopic growth factor could be estimated using these two parameters. The upscatter fraction (β) and single scattering albedo, which are the key aerosol optical properties for the calculation of direct radiative forcing, are also RH-dependent. As RH increases, the upscatter fraction (backscatter fraction) decreases and ω0 increases. The aerosol radiative forcing at RH 80 % was 1.48 times as that in the dry state. The sensitivity experiment showed that the variation in the scattering coefficient with relative humidity had the greatest influence on radiation forcing, followed by β and ω0. The seasonal variation of ΔF(80 %)/ΔF(dry) coincides with that of the aerosol hygroscopic growth factor. Our study suggests that understanding the influence of relative humidity on aerosol properties and direct radiative forcing is important for accurately estimating the radiative forcing of aerosols.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
桐桐应助liars采纳,获得10
刚刚
yishan101完成签到,获得积分10
1秒前
2秒前
可靠觅珍应助高大的依秋采纳,获得30
4秒前
4秒前
5秒前
澡雪发布了新的文献求助10
5秒前
大模型应助YXC采纳,获得10
6秒前
6秒前
蟪蛄鸪完成签到 ,获得积分20
7秒前
7秒前
Bryan应助科研通管家采纳,获得10
9秒前
科研通AI5应助科研通管家采纳,获得10
9秒前
FashionBoy应助科研通管家采纳,获得10
10秒前
饱满南松发布了新的文献求助10
10秒前
乐乐应助科研通管家采纳,获得10
10秒前
丘比特应助科研通管家采纳,获得10
10秒前
领导范儿应助科研通管家采纳,获得10
10秒前
852应助科研通管家采纳,获得10
10秒前
Owen应助科研通管家采纳,获得30
10秒前
Bryan应助科研通管家采纳,获得10
10秒前
Akim应助科研通管家采纳,获得10
10秒前
乐乐应助科研通管家采纳,获得10
10秒前
花花发布了新的文献求助10
12秒前
多金完成签到,获得积分10
12秒前
闪电侠完成签到 ,获得积分10
13秒前
14秒前
多金发布了新的文献求助10
15秒前
15秒前
dodo应助王者归来采纳,获得200
15秒前
精明的沅应助甜美的一笑采纳,获得10
16秒前
19秒前
Rondab应助HIT_C采纳,获得10
20秒前
卢建军应助虚幻初之采纳,获得20
21秒前
LL关闭了LL文献求助
21秒前
七一安完成签到 ,获得积分10
21秒前
左左完成签到,获得积分20
22秒前
22秒前
瘦瘦的斑马完成签到,获得积分20
24秒前
活到老学到老完成签到,获得积分10
24秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3975516
求助须知:如何正确求助?哪些是违规求助? 3519930
关于积分的说明 11200130
捐赠科研通 3256278
什么是DOI,文献DOI怎么找? 1798183
邀请新用户注册赠送积分活动 877425
科研通“疑难数据库(出版商)”最低求助积分说明 806320