Characterizing the composition and evolution of and urban particles in Chongqing (China) during summertime
Characterizing the composition and evolution of and urban particles in Chongqing (China) during summertime
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描述重庆（中国）夏季城市颗粒物的组成和演变
DOI：
10.1016/j.atmosres.2016.12.005
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发表时间：
2017-05
影响因子：
5.5
通讯作者：
Wang Qiyuan
中科院分区：
文献类型：
--
作者：
Chen Yang;Yang Fumo;Mi Tian;Cao Junji;Shi Guangming;Huang Rujin;Wang Huanbo;Chen Jun;Lou Shengrong;Wang Qiyuan
利用单粒子气溶胶质谱仪（SPAMS）对2014年夏季（07/05/2014 - 08/06/2014）重庆城市大气颗粒物进行了研究。研究了城市颗粒物的化学组成、混合状态和大气行为。主要颗粒类型包括ECOC（元素碳-有机碳20.6%）、OC（20.1%）、KSec（K-二次）（13.3%）、BB（生物质燃烧，11.9%）、NaK（钠钾富集，7.3%）、Al富集（4.0%）、Fe富集（3.2%）、Ca富集（1.4%）、Ca-EC（1.6%）和NaKPb（0.5%）。凝结态（< 0.7 μm）以EC、ECOC、OC和Ca-EC为主，液滴态（0.7-1.1 μm）和粗粒态以KSec、EC和NaK为主。老年组EC、KSec和NaK在下午增加。结果表明，不同单颗粒物的湿清除率大小顺序为：NaKPb > Fe-rich > EC > Ca-EC > Ca-rich > KSec > OC > NaK > ECOC > Al-rich > BB。EC数分数和KSec的增加与奇数氧（Ox= O3+ NO2）的增加相关。EC、OC和ECOC在较高的相对湿度下富集。这项研究的结果的混合状态，时间变化，处理和演变的单个颗粒提供了新的见解大气行为和城市颗粒的影响。
Urban particles were investigated using a single particle aerosol mass spectrometer (SPAMS) in Chongqing during the summertime (from 07/05/2014 to 08/06/2014). Chemical composition, mixing state, and atmospheric behavior of urban particles were studied. The major particle types include ECOC (Elemental-Carbon-Organic-Carbon 20.6%), OC (20.1%), KSec (K-Secondary) (13.3%), BB (Biomass burning, 11.9%), NaK (sodium-potassium-rich, 7.3%), Al-rich (4.0%), Fe-rich (3.2%), Ca-rich (1.4%), Ca-EC (1.6%), and NaKPb (0.5%). EC, ECOC, OC, and Ca-EC were prevalent in the condensation mode (< 0.7 μm), while KSec, EC, NaK were significant in both the droplet mode (0.7–1.1 μm) and coarse mode. Increases in aged groups such as EC, KSec, and NaK were observed in the afternoon. Case studies suggested that wet scavenging (rain) rates of different single particle types followed an order of NaKPb > Fe-rich > EC > Ca-EC > Ca-rich > KSec > OC > NaK > ECOC > Al-rich > BB. Increased number fraction of EC and KSec were correlated with the increase of odd oxygen (Ox= O3+ NO2). EC, OC, and ECOC were enriched at higher relative humidity. The findings of this study on the mixing state, temporal variation, processing, and evolution of single particles provide new insight into the atmospheric behavior and impacts of urban particles.
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影响因子：
11.4
作者：
D. Sodeman;Stephen M. Toner;K. Prather
通讯作者：
D. Sodeman;Stephen M. Toner;K. Prather
影响因子：
5.5
作者：
Yang, Fan;Chen, Hong;Du, Jianfei;Yang, Xin;Gao, Song;Chen, Jianmin;Geng, Fuhai
通讯作者：
Geng, Fuhai
影响因子：
5
作者：
P. Silva;Richard A Carlin;K. Prather
通讯作者：
P. Silva;Richard A Carlin;K. Prather
DOI：
10.1007/978-3-642-41215-8
发表时间：
2014
期刊：
Atmospheric and Aerosol Chemistry
影响因子：
--
作者：
V. McNeill;P. Ariya;M. Ammann
通讯作者：
V. McNeill;P. Ariya;M. Ammann
DOI：
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发表时间：
2010
期刊：
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影响因子：
--
作者：
通讯作者：
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