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- W2757772538 abstract "Abstract. China is experiencing severe carbonaceous aerosol pollution driven mainly by large emissions resulting from intensive use of solid fuels. To gain a better understanding of the levels and trends of carbonaceous aerosol emissions and the resulting ambient concentrations at the national scale, we update an emission inventory of anthropogenic organic carbon (OC) and elemental carbon (EC) and employ existing observational studies to analyze characteristics of these aerosols including temporal, spatial, and size distributions, and the levels and shares of secondary organic carbon (SOC) in total OC. We further use ground observations to test the levels and inter-annual trends of the calculated national and provincial emissions of carbonaceous aerosols, and propose possible improvements in emission estimation for the future. The national OC emissions are estimated to have increased 29% from 2000 (2127 Gg) to 2012 (2749 Gg) and EC by 37% (from 1356 to 1857 Gg). The residential, industrial, and transportation sectors contributed an estimated 76 ± 2, 19 ± 2 and 5 ± 1% of the total emissions of OC, respectively, and 52 ± 3, 32 ± 2 and 16 ± 2% of EC. Updated emission factors based on the most recent local field measurements, particularly for biofuel stoves, lead to considerably lower emissions of OC compared to previous inventories. Compiling observational data across the country, higher concentrations of OC and EC are found in northern and inland cities, while larger OC/EC and SOC/OC ratios are found in southern cities, due to the joint effects of primary emissions and meteorology. Higher SOC/OC ratios are estimated at rural and remote sites compared to urban ones, attributed to more emissions of OC from biofuel use, more biogenic emissions of volatile organic compound (VOC) precursors to SOC, and/or transport of aged aerosols. For most sites, higher concentrations of OC, EC, and SOC are observed in colder seasons, while SOC/OC is reduced, particularly at rural and remote sites, attributed partly to weaker atmospheric oxidation and SOC formation compared to summer. Enhanced SOC formation from oxidization and anthropogenic activities like biomass combustion is judged to have crucial effects on severe haze events characterized by high particle concentrations. Several observational studies indicate an increasing trend in ambient OC/EC (but not in OC or EC individually) from 2000 to 2010, confirming increased atmospheric oxidation of OC across the country. Combining the results of emission estimation and observations, the improvement over prior emission inventories is indicated by inter-annual comparisons and correlation analysis. It is also indicated, however, that the estimated growth in emissions might be faster than observed growth, and that some sources with high primary OC/EC like burning of biomass are still underestimated. Further studies to determine changing emission factors over time in the residential sector and to compare to other measurements such as satellite observations are thus suggested to improve understanding of the levels and trends of primary carbonaceous aerosol emissions in China." @default.
- W2757772538 created "2017-10-06" @default.
- W2757772538 creator A5078356354 @default.
- W2757772538 date "2015-03-25" @default.
- W2757772538 modified "2023-10-17" @default.
- W2757772538 title "Patterns in atmospheric carbonaceous aerosols in China: emission estimates and observed concentrations" @default.
- W2757772538 cites W140712929 @default.
- W2757772538 cites W1517984787 @default.
- W2757772538 cites W1522177459 @default.
- W2757772538 cites W1654490588 @default.
- W2757772538 cites W1966423195 @default.
- W2757772538 cites W1972749455 @default.
- W2757772538 cites W1973058060 @default.
- W2757772538 cites W1973159294 @default.
- W2757772538 cites W1974483303 @default.
- W2757772538 cites W1974604128 @default.
- W2757772538 cites W1974608064 @default.
- W2757772538 cites W1976350182 @default.
- W2757772538 cites W1976358613 @default.
- W2757772538 cites W1978248846 @default.
- W2757772538 cites W1981437604 @default.
- W2757772538 cites W1981500375 @default.
- W2757772538 cites W1983146165 @default.
- W2757772538 cites W1986500065 @default.
- W2757772538 cites W1988469779 @default.
- W2757772538 cites W1994828895 @default.
- W2757772538 cites W1997330848 @default.
- W2757772538 cites W2001663065 @default.
- W2757772538 cites W2001851660 @default.
- W2757772538 cites W2002129959 @default.
- W2757772538 cites W2002553150 @default.
- W2757772538 cites W2002709849 @default.
- W2757772538 cites W2005599949 @default.
- W2757772538 cites W2008345783 @default.
- W2757772538 cites W2009528393 @default.
- W2757772538 cites W2012434189 @default.
- W2757772538 cites W2016146814 @default.
- W2757772538 cites W2016283140 @default.
- W2757772538 cites W2017322902 @default.
- W2757772538 cites W2022079627 @default.
- W2757772538 cites W2022084776 @default.
- W2757772538 cites W2025593924 @default.
- W2757772538 cites W2028383591 @default.
- W2757772538 cites W2031827558 @default.
- W2757772538 cites W2033371937 @default.
- W2757772538 cites W2040771490 @default.
- W2757772538 cites W2041436395 @default.
- W2757772538 cites W2045854720 @default.
- W2757772538 cites W2046070545 @default.
- W2757772538 cites W2047378172 @default.
- W2757772538 cites W2048669605 @default.
- W2757772538 cites W2049423811 @default.
- W2757772538 cites W2049824949 @default.
- W2757772538 cites W2050441431 @default.
- W2757772538 cites W2051372385 @default.
- W2757772538 cites W2052175831 @default.
- W2757772538 cites W2052469372 @default.
- W2757772538 cites W2054036271 @default.
- W2757772538 cites W2054579967 @default.
- W2757772538 cites W2056537970 @default.
- W2757772538 cites W2060071392 @default.
- W2757772538 cites W2062887707 @default.
- W2757772538 cites W2070533532 @default.
- W2757772538 cites W2075350508 @default.
- W2757772538 cites W2078945193 @default.
- W2757772538 cites W2079348805 @default.
- W2757772538 cites W2079873894 @default.
- W2757772538 cites W2081909838 @default.
- W2757772538 cites W2081949443 @default.
- W2757772538 cites W2083253824 @default.
- W2757772538 cites W2083985768 @default.
- W2757772538 cites W2084225461 @default.
- W2757772538 cites W2085130189 @default.
- W2757772538 cites W2091184493 @default.
- W2757772538 cites W2093047912 @default.
- W2757772538 cites W2100110998 @default.
- W2757772538 cites W2102948292 @default.
- W2757772538 cites W2105792504 @default.
- W2757772538 cites W2112385570 @default.
- W2757772538 cites W2117560289 @default.
- W2757772538 cites W2120288110 @default.
- W2757772538 cites W2122770978 @default.
- W2757772538 cites W2130042267 @default.
- W2757772538 cites W2137803394 @default.
- W2757772538 cites W2140285739 @default.
- W2757772538 cites W2140805694 @default.
- W2757772538 cites W2143965493 @default.
- W2757772538 cites W2146034139 @default.
- W2757772538 cites W2147185456 @default.
- W2757772538 cites W2150009788 @default.
- W2757772538 cites W2153146321 @default.
- W2757772538 cites W2159056393 @default.
- W2757772538 cites W2163882954 @default.
- W2757772538 cites W2164231461 @default.
- W2757772538 cites W2164268820 @default.
- W2757772538 cites W2170900174 @default.
- W2757772538 cites W2314733460 @default.
- W2757772538 cites W2324091296 @default.
- W2757772538 doi "https://doi.org/10.5194/acpd-15-8983-2015" @default.
- W2757772538 hasPublicationYear "2015" @default.