Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-17-1805-2017 |
Differences in BVOC oxidation and SOA formation above and below the forest canopy | |
Schulze, Benjamin C.1; Wallace, Henry W.1; Flynn, James H.2; Lefer, Barry L.3; Erickson, Matt H.2; Jobson, B. Tom4; Dusanter, Sebastien5,6,7; Griffith, Stephen M.7,9; Hansen, Robert F.8,10; Stevens, Philip S.8; VanReken, Timothy4,11; Griffin, Robert J.1 | |
2017-02-07 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; France; Peoples R China; England |
英文摘要 | Gas-phase biogenic volatile organic compounds (BVOCs) are oxidized in the troposphere to produce secondary pollutants such as ozone (O-3), organic nitrates (RONO2), and secondary organic aerosol (SOA). Two coupled zero-dimensional models have been used to investigate differences in oxidation and SOA production from isoprene and alpha-pinene, especially with respect to the nitrate radical (NO3), above and below a forest canopy in rural Michigan. In both modeled environments (above and below the canopy), NO3 mixing ratios are relatively small (<0.5 pptv); however, daytime (08:00-20:00 LT) mixing ratios below the canopy are 2 to 3 times larger than those above. As a result of this difference, NO3 contributes 12% of total daytime alpha-pinene oxidation below the canopy while only contributing 4% above. Increasing background pollutant levels to simulate a more polluted suburban or peri-urban forest environment increases the average contribution of NO3 to daytime below-canopy alpha-pinene oxidation to 32 %. Gas-phase RONO2 produced through NO3 oxidation undergoes net transport upward from the below-canopy environment during the day, and this transport contributes up to 30% of total NO3-derived RONO2 production above the canopy in the morning (similar to 07:00). Modeled SOA mass loadings above and below the canopy ultimately differ by less than 0.5 mu g m(-3), and extremely low-volatility organic compounds dominate SOA composition. Lower temperatures below the canopy cause increased partitioning of semi-volatile gas-phase products to the particle phase and up to 35% larger SOA mass loadings of these products relative to above the canopy in the model. Including transport between above-and below-canopy environments increases above-canopy NO3-derived alpha-pinene RONO2 SOA mass by as much as 45 %, suggesting that below-canopy chemical processes substantially influence above-canopy SOA mass loadings, especially with regard to monoterpene-derived RONO2. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395126700002 |
WOS关键词 | SECONDARY ORGANIC AEROSOL ; HO2 RADICAL CHEMISTRY ; TORCH 2003 CAMPAIGN ; ALPHA-PINENE ; TROPOSPHERIC DEGRADATION ; ABSORPTION-MODEL ; NITROGEN-OXIDES ; REGIONAL-SCALE ; NO3 OXIDATION ; TRACE GASES |
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/31122 |
专题 | 地球科学 |
作者单位 | 1.Rice Univ, Dept Civil & Environm Engn, Houston, TX 77005 USA; 2.Univ Houston, Dept Earth & Atmospher Sci, Houston, TX 77204 USA; 3.NASA, Airborne Sci Program, Washington, DC 20546 USA; 4.Washington State Univ, Lab Atmospher Res, Dept Civil & Environm Engn, Pullman, WA 99164 USA; 5.SAGE, Mines Douai, F-59508 Douai, France; 6.Univ Lille, F-59655 Villeneuve Dascq, France; 7.Indiana Univ, Sch Publ & Environm Affairs, Bloomington, IN 47405 USA; 8.Indiana Univ, Dept Chem, Bloomington, IN 47405 USA; 9.Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China; 10.Univ Leeds, Sch Chem, Leeds LS2 9JT, W Yorkshire, England; 11.Natl Sci Fdn, Washington, DC 20230 USA |
推荐引用方式 GB/T 7714 | Schulze, Benjamin C.,Wallace, Henry W.,Flynn, James H.,et al. Differences in BVOC oxidation and SOA formation above and below the forest canopy[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(3). |
APA | Schulze, Benjamin C..,Wallace, Henry W..,Flynn, James H..,Lefer, Barry L..,Erickson, Matt H..,...&Griffin, Robert J..(2017).Differences in BVOC oxidation and SOA formation above and below the forest canopy.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(3). |
MLA | Schulze, Benjamin C.,et al."Differences in BVOC oxidation and SOA formation above and below the forest canopy".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.3(2017). |
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