Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2017JD028242 |
Secondary Organic Aerosol Formation From Isoprene Epoxides in the Pearl River Delta, South China: IEPOX- and HMML-Derived Tracers | |
He, Quan-Fu1,2,3; Ding, Xiang1,2; Fu, Xiao-Xin4; Zhang, Yu-Qing1,2,5; Wang, Jun-Qi1,2,5; Liu, Ye-Xin6; Tang, Ming-Jin1,2; Wang, Xin-Ming1,2,7; Rudich, Yinon3 | |
2018-07-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:13页码:6999-7012 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Israel |
英文摘要 | Atmospheric photooxidation of isoprene forms isoprene epoxydiols (IEPOX) and hydroxymethel-methyl--lactone (HMML) via hydroperoxyl radical (HO2) channel and NO/NO2 channel, respectively. Reactive uptake of these epoxides onto particles produces isoprene secondary organic aerosols (iSOA). Currently, there is little information regarding these two epoxides during iSOA formation in polluted regions. In this study, iSOA tracers from IEPOX and HMML were measured from summer to fall in the heavily polluted Pearl River Delta (PRD) region. The total concentration of the iSOA tracers ranged from 5.77 to 466ngm(-3). Isoprene SOA tracers correlated well with sulfate (p<0.01), indicating that the abundant sulfate in the PRD plays an important role in iSOA formation. A kinetic model of IEPOX loss showed that 58% of IEPOX could undergo ring-opening reactions under the polluted PRD conditions in summer. This leads to high levels of IEPOX-derived SOA tracers in the PRD. High temperature in the PRD (>22 degrees C) suppresses the production of HMML, likely as a result of fast decomposition of HMML's precursor under high temperatures. Thus, the HMML-derived tracers had lower levels than the IEPOX-derived SOA tracers during the whole campaign. The ratios of the IEPOX-derived tracers to the HMML-derived SOA tracers in summer were 3 times higher than those in fall. This seasonal trend may be explained by the relative high isoprene/NOx ratio, temperature, and fast heterogeneous reaction of IEPOX in summer. Our study shows that in highly polluted regions like PRD, reduction in SO2 emission can significantly reduce iSOA formation. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000439799300019 |
WOS关键词 | SOUTHEASTERN UNITED-STATES ; REACTIVE UPTAKE ; CHEMICAL-CHARACTERIZATION ; ANTHROPOGENIC EMISSIONS ; OXIDATION-PRODUCTS ; BACKGROUND SITE ; FINE PARTICLES ; SOA FORMATION ; GROUND SITE ; EPOXYDIOLS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32160 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou, Guangdong, Peoples R China; 2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Environm Protect & Resourc, Guangzhou, Guangdong, Peoples R China; 3.Weizmann Inst Sci, Dept Earth & Planetary Sci, Rehovot, Israel; 4.Southwest Univ Sci & Technol, Mianyang, Peoples R China; 5.Univ Chinese Acad Sci, Beijing, Peoples R China; 6.Guangzhou Environm Monitoring Ctr, Guangzhou, Guangdong, Peoples R China; 7.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen, Peoples R China |
推荐引用方式 GB/T 7714 | He, Quan-Fu,Ding, Xiang,Fu, Xiao-Xin,et al. Secondary Organic Aerosol Formation From Isoprene Epoxides in the Pearl River Delta, South China: IEPOX- and HMML-Derived Tracers[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(13):6999-7012. |
APA | He, Quan-Fu.,Ding, Xiang.,Fu, Xiao-Xin.,Zhang, Yu-Qing.,Wang, Jun-Qi.,...&Rudich, Yinon.(2018).Secondary Organic Aerosol Formation From Isoprene Epoxides in the Pearl River Delta, South China: IEPOX- and HMML-Derived Tracers.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(13),6999-7012. |
MLA | He, Quan-Fu,et al."Secondary Organic Aerosol Formation From Isoprene Epoxides in the Pearl River Delta, South China: IEPOX- and HMML-Derived Tracers".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.13(2018):6999-7012. |
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