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Emission Ratios and Source Identification of VOCs in Moscow in 2019–2020. ATMOSPHERE 2022. [DOI: 10.3390/atmos13020257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Measurements of CO and 15 volatile organic compounds (VOCs) at the IAP-RAS (A.M. Obukhov Institute of Atmospheric Physics) site located in the center of Moscow were analyzed. Acetaldehyde, ethanol, 1.3-butadiene, isoprene, toluene and C-8 aromatics were established to be the main ozone precursors in the observed area, providing up to 82% of the total ozone formation potential of the VOCs measured. Diurnal and seasonal variations of the compounds are discussed. The concentrations of anthropogenic VOCs (acetaldehyde, benzene, 1.3-butadiene, toluene, and C-8 aromatics) did not exceed their maximum permissible levels, reaching their maxima in summer and autumn in the morning and evening hours. Biogenic ethanol and isoprene were the highest in summer midday but their concentrations were low enough (up to 4 and 0.4 ppbv, respectively) due to small vegetation area around the site. Emission ratios (ERs) for the main ozone precursors—acetaldehyde, ethanol, 1.3-butadiene, isoprene, toluene, and C-8 aromatics—were estimated from two-sided linear regression fits using benzene and CO as tracers for anthropogenic emissions, with spatial and temporal filters being applied to account for the influence of chemistry and local emission sources. The best estimates of ERs were obtained using benzene as a reference species. Anthropogenic fractions of VOCs (AFs) were then estimated. As expected, acetaldehyde, toluene, 1.3-butadiene, and C8aromatics were entirely anthropogenic and emitted mainly from urban vehicle exhausts throughout the day, both in summer and in winter. AFs of isoprene and ethanol did not exceed 30% and 50% in summer, respectively, during both daytime and nighttime hours. In winter, the anthropogenic fractions of isoprene and ethanol were slightly higher (up to 35% and 60%, respectively).
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Panov AV, Prokushkin AS, Korets MA, Bryukhanov AV, Myers-Pigg AN, Louchouarn P, Sidenko NV, Amon R, Andreae MO, Heimann M. Linking trace gas measurements and molecular tracers of organic matter in aerosols for identification of ecosystem sources and types of wildfires in Central Siberia. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1755-1315/48/1/012017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Lin NH, Sayer AM, Wang SH, Loftus AM, Hsiao TC, Sheu GR, Hsu NC, Tsay SC, Chantara S. Interactions between biomass-burning aerosols and clouds over Southeast Asia: current status, challenges, and perspectives. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2014; 195:292-307. [PMID: 25085565 DOI: 10.1016/j.envpol.2014.06.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Revised: 06/08/2014] [Accepted: 06/28/2014] [Indexed: 06/03/2023]
Abstract
The interactions between aerosols, clouds, and precipitation remain among the largest sources of uncertainty in the Earth's energy budget. Biomass-burning aerosols are a key feature of the global aerosol system, with significant annually-repeating fires in several parts of the world, including Southeast Asia (SEA). SEA in particular provides a "natural laboratory" for these studies, as smoke travels from source regions downwind in which it is coupled to persistent stratocumulus decks. However, SEA has been under-exploited for these studies. This review summarizes previous related field campaigns in SEA, with a focus on the ongoing Seven South East Asian Studies (7-SEAS) and results from the most recent BASELInE deployment. Progress from remote sensing and modeling studies, along with the challenges faced for these studies, are also discussed. We suggest that improvements to our knowledge of these aerosol/cloud effects require the synergistic use of field measurements with remote sensing and modeling tools.
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Affiliation(s)
- Neng-Huei Lin
- Department of Atmospheric Sciences, National Central University, Chung-Li, Taiwan; Chemistry Department and Environmental Science Program, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand.
| | - Andrew M Sayer
- Goddard Space Flight Center, NASA, Greenbelt, MD, USA; Universities Space Research Association, Columbia, MD, USA
| | - Sheng-Hsiang Wang
- Department of Atmospheric Sciences, National Central University, Chung-Li, Taiwan
| | - Adrian M Loftus
- Goddard Space Flight Center, NASA, Greenbelt, MD, USA; Oak Ridge Associated Universities, Oak Ridge, TN, USA
| | - Ta-Chih Hsiao
- Graduate Institute of Environmental Engineering, National Central University, Chung-Li, Taiwan
| | - Guey-Rong Sheu
- Department of Atmospheric Sciences, National Central University, Chung-Li, Taiwan
| | | | - Si-Chee Tsay
- Goddard Space Flight Center, NASA, Greenbelt, MD, USA
| | - Somporn Chantara
- Chemistry Department and Environmental Science Program, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
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