TY - JOUR
T1 - Airborne formaldehyde and volatile organic compound measurements over the Daesan petrochemical complex on Korea’s northwest coast during the Korea-United States Air Quality study
T2 - Estimation of emission fluxes and effects on air quality
AU - Fried, Alan
AU - Walega, James
AU - Weibring, Petter
AU - Richter, Dirk
AU - Simpson, Isobel J.
AU - Blake, Donald R.
AU - Blake, Nicola J.
AU - Meinardi, Simone
AU - Barletta, Barbara
AU - Hughes, Stacey C.
AU - Crawford, James H.
AU - Diskin, G.
AU - Barrick, John
AU - Hair, Johnathan
AU - Fenn, Marta
AU - Wisthaler, Armin
AU - Mikoviny, Tomas
AU - Woo, Jung Hun
AU - Park, Minwoo
AU - Kim, Jinseok
AU - Min, Kyung Eun
AU - Jeong, Seokhan
AU - Wennberg, Paul O.
AU - Kim, Michelle J.
AU - Crounse, John D.
AU - Teng, Alex P.
AU - Bennett, Ryan
AU - Yang-Martin, Melissa
AU - Shook, Michael A.
AU - Huey, Greg
AU - Tanner, David
AU - Knote, Christoph
AU - Kim, Jong Ho
AU - Park, Rokjin
AU - Brune, William
N1 - Publisher Copyright:
Copyright: © 2020 The Author(s).
PY - 2020/12/31
Y1 - 2020/12/31
N2 - The U.S. National Aeronautics and Space Administration in partnership with Korea’s National Institute of Environmental Research embarked on the Korea-United States Air Quality (KORUS-AQ) study to address air quality issues over the Korean peninsula. Underestimation of volatile organic compound (VOC) emissions from various large facilities on South Korea’s northwest coast may contribute to this problem, and this study focuses on quantifying top-down emissions of formaldehyde (CH2O) and VOCs from the largest of these facilities,the Daesan petrochemical complex, and comparisons with the latest emission inventories.To accomplish this and additional goals discussed herein, this study employed a number of measurements acquired during KORUS-AQ onboard the NASA DC-8 aircraft during three Daesan overflights on June 2, 3, and 5, 2016, in conjunction with a mass balance approach. The measurements included fast airborne measurements of CH2O and ethane from an infrared spectrometer, additional fast measurements from other instruments, and a suite of 33 VOC measurements acquired by the whole air sampler. The mass balance approach resulted in consistent top-down yearly Daesan VOC emission flux estimates, which averaged (61 + 14) × 103 MT/year for the 33 VOC compounds, a factor of 2.9 + 0.6 (+1.0) higher than the bottom-up inventory value. The top-down Daesan emission estimate for CH2O and its four primary precursors averaged a factor of 4.3 + 1.5 (+ 1.9) times higher than the bottom-up inventory value. The uncertainty values in parentheses reflect upper limits for total uncertainty estimates. The resulting averaged top-down Daesan emission estimate for sulfur dioxide (SO2) yielded a ratio of 0.81–1.0 times the bottom-up SO2 inventory, and this provides an important cross-check on the accuracy of our mass balance analysis.
AB - The U.S. National Aeronautics and Space Administration in partnership with Korea’s National Institute of Environmental Research embarked on the Korea-United States Air Quality (KORUS-AQ) study to address air quality issues over the Korean peninsula. Underestimation of volatile organic compound (VOC) emissions from various large facilities on South Korea’s northwest coast may contribute to this problem, and this study focuses on quantifying top-down emissions of formaldehyde (CH2O) and VOCs from the largest of these facilities,the Daesan petrochemical complex, and comparisons with the latest emission inventories.To accomplish this and additional goals discussed herein, this study employed a number of measurements acquired during KORUS-AQ onboard the NASA DC-8 aircraft during three Daesan overflights on June 2, 3, and 5, 2016, in conjunction with a mass balance approach. The measurements included fast airborne measurements of CH2O and ethane from an infrared spectrometer, additional fast measurements from other instruments, and a suite of 33 VOC measurements acquired by the whole air sampler. The mass balance approach resulted in consistent top-down yearly Daesan VOC emission flux estimates, which averaged (61 + 14) × 103 MT/year for the 33 VOC compounds, a factor of 2.9 + 0.6 (+1.0) higher than the bottom-up inventory value. The top-down Daesan emission estimate for CH2O and its four primary precursors averaged a factor of 4.3 + 1.5 (+ 1.9) times higher than the bottom-up inventory value. The uncertainty values in parentheses reflect upper limits for total uncertainty estimates. The resulting averaged top-down Daesan emission estimate for sulfur dioxide (SO2) yielded a ratio of 0.81–1.0 times the bottom-up SO2 inventory, and this provides an important cross-check on the accuracy of our mass balance analysis.
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U2 - 10.1525/lementa.2020.121
DO - 10.1525/lementa.2020.121
M3 - Article
AN - SCOPUS:85104838921
SN - 2325-1026
VL - 8
JO - Elementa
JF - Elementa
IS - 1
M1 - 121
ER -