GSTDTAP  > 地球科学
DOI10.5194/acp-17-6611-2017
Influence of urban pollution on the production of organic particulate matter from isoprene epoxydiols in central Amazonia
de Sa, Suzane S.1; Palm, Brett B.2,3; Campuzano-Jost, Pedro2,3; Day, Douglas A.2,3; Newburn, Matthew K.4; Hu, Weiwei2,3; Isaacman-VanWertz, Gabriel5,13; Yee, Lindsay D.5; Thalman, Ryan6; Brito, Joel7,14; Carbone, Samara7; Artaxo, Paulo7; Goldstein, Allen H.5; Manzi, Antonio O.8; Souza, Rodrigo A. F.9; Mei, Fan10; Shilling, John E.4,10; Springston, Stephen R.6; Wang, Jian6; Surratt, Jason D.11; Alexander, M. Lizabeth4; Jimenez, Jose L.2,3; Martin, Scot T.1,12
2017-06-06
发表期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2017
卷号17期号:11
文章类型Article
语种英语
国家USA; Brazil; France
英文摘要

The atmospheric chemistry of isoprene contributes to the production of a substantial mass fraction of the particulate matter (PM) over tropical forests. Isoprene epoxydiols (IEPOX) produced in the gas phase by the oxidation of isoprene under HO2-dominant conditions are subsequently taken up by particles, thereby leading to production of secondary organic PM. The present study investigates possible perturbations to this pathway by urban pollution. The measurement site in central Amazonia was located 4 to 6 h downwind of Manaus, Brazil. Measurements took place from February through March 2014 of the wet season, as part of the GoAmazon2014/5 experiment. Mass spectra of organic PM collected with an Aerodyne Aerosol Mass Spectrometer were analyzed by positive-matrix factorization. One resolved statistical factor ("IEPOX-SOA factor") was associated with PM production by the IEPOX pathway. The IEPOX-SOA factor loadings correlated with independently measured mass concentrations of tracers of IEPOX-derived PM, namely C-5-alkene triols and 2-methyltetrols (R = 0.96 and 0.78, respectively). The factor loading, as well as the ratio f of the loading to organic PM mass concentration, decreased under polluted compared to background conditions. For an increase in NOy concentration from 0.5 to 2 ppb, the factor loading and f decreased by two to three fold. Overall, sulfate concentration explained 37% of the variability in the factor loading. After segregation of factor loading into subsets based on NOy concentration, the sulfate concentration explained up to 75% of the variability. Considering both factors, the data sets show that the suppressing effects of increased NO concentrations dominated over the enhancing effects of higher sulfate concentrations. The pollution from Manaus elevated NOy concentrations more significantly than sulfate concentrations relative to background conditions. In this light, increased emissions of nitrogen oxides, as anticipated for some scenarios of Amazonian economic development, could significantly alter pathways of PM production that presently prevail over the tropical forest, implying changes to air quality and regional climate.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000402958000002
WOS关键词SOUTHEASTERN UNITED-STATES ; AEROSOL MASS-SPECTROMETER ; REACTIVE UPTAKE ; RAIN-FOREST ; WET SEASON ; ANTHROPOGENIC EMISSIONS ; PHOTOOXIDATION PRODUCTS ; MULTIPHASE CHEMISTRY ; CHEMICAL-COMPOSITION ; AQUEOUS PARTICLES
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; 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/24993
专题地球科学
作者单位1.Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA;
2.Univ Colorado, Dept Chem & Biochem, Boulder, CO USA;
3.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA;
4.Pacific Northwest Natl Lab, Environm Mol Sci Lab, Richland, WA USA;
5.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA USA;
6.Brookhaven Natl Lab, Upton, NY 11973 USA;
7.Univ Sao Paulo, Dept Fis Aplicada, Sao Paulo, Brazil;
8.Inst Nacl de Pesquisas da Amazonia, Manaus, Amazonas, Brazil;
9.Univ Estado Amazonas, Escola Super Tecnol, Manaus, Amazonas, Brazil;
10.Pacific Northwest Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99352 USA;
11.Univ N Carolina, Gillings Sch Global Publ Hlth, Dept Environm Sci & Engn, Chapel Hill, NC USA;
12.Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA;
13.MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA;
14.Univ Blaise Pascal, Lab Meteorol Phys LaMP, Aubiere, France
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de Sa, Suzane S.,Palm, Brett B.,Campuzano-Jost, Pedro,et al. Influence of urban pollution on the production of organic particulate matter from isoprene epoxydiols in central Amazonia[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(11).
APA de Sa, Suzane S..,Palm, Brett B..,Campuzano-Jost, Pedro.,Day, Douglas A..,Newburn, Matthew K..,...&Martin, Scot T..(2017).Influence of urban pollution on the production of organic particulate matter from isoprene epoxydiols in central Amazonia.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(11).
MLA de Sa, Suzane S.,et al."Influence of urban pollution on the production of organic particulate matter from isoprene epoxydiols in central Amazonia".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.11(2017).
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