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Ozone seasonal evolution and photochemical production regime in the polluted troposphere in eastern China derived from high-resolution Fourier transform spectrometry (FTS) observations

Journal Article


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Abstract


  • The seasonal evolution of O3 and its photochemical production regime in a polluted region of eastern China between 2014 and 2017 has been investigated using observations. We used tropospheric ozone (O3), carbon monoxide (CO), and formaldehyde (HCHO, a marker of VOCs (volatile organic compounds)) partial columns derived from high-resolution Fourier transform spectrometry (FTS); tropospheric nitrogen dioxide (NO2, a marker of NOx (nitrogen oxides)) partial column deduced from the Ozone Monitoring Instrument (OMI); surface meteorological data; and a back trajectory cluster analysis technique. A broad O3 maximum during both spring and summer (MAM/JJA) is observed; the day-to-day variations in MAM/JJA are generally larger than those in autumn and winter (SON/DJF). Tropospheric O3 columns in June are 1.55×1018moleculescm-2 (56DU (Dobson units)), and in December they are 1.05×1018moleculescm-2 (39 DU). Tropospheric O3 columns in June were ∼ 50% higher than those in December. Compared with the SON/DJF season, the observed tropospheric O3 levels in MAM/JJA are more influenced by the transport of air masses from densely populated and industrialized areas, and the high O3 level and variability in MAM/JJA is determined by the photochemical O3 production. The tropospheric-column HCHO/NO2 ratio is used as a proxy to investigate the photochemical O3 production rate (PO3). The results show that the PO3 is mainly nitrogen oxide (NOx) limited in MAM/JJA, while it is mainly VOC or mixed VOC-NOx limited in SON/DJF. Statistics show that NOx-limited, mixed VOC-NOx-limited, and VOC-limited PO3 accounts for 60.1%, 28.7%, and 11% of days, respectively. Considering most of PO3 is NOx limited or mixed VOC-NOx limited, reductions in NOx would reduce O3 pollution in eastern China.

Authors


  •   Sun, Youwen (external author)
  •   Liu, Cheng (external author)
  •   Palm, Mathias (external author)
  •   Vigouroux, C (external author)
  •   Notholt, Justus (external author)
  •   Hu, Qihou (external author)
  •   Jones, Nicholas B.
  •   Wang, Wei (external author)
  •   Su, Wenjing (external author)
  •   Zhang, Wenqiang (external author)
  •   Shan, Changong (external author)
  •   Tian, Yuan (external author)
  •   Xu, Xingwei (external author)
  •   de Maziere, Martine (external author)
  •   Zhou, Minqiang (external author)
  •   Liu, Jianguo (external author)

Publication Date


  • 2018

Citation


  • Sun, Y., Liu, C., Palm, M., Vigouroux, C., Notholt, J., Hu, Q., Jones, N., Wang, W., Su, W., Zhang, W., Shan, C., Tian, Y., Xu, X., de Maziere, M., Zhou, M. & Liu, J. (2018). Ozone seasonal evolution and photochemical production regime in the polluted troposphere in eastern China derived from high-resolution Fourier transform spectrometry (FTS) observations. Atmospheric Chemistry and Physics, 18 (19), 14569-14583.

Scopus Eid


  • 2-s2.0-85054871988

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=1367&context=smhpapers1

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers1/360

Number Of Pages


  • 14

Start Page


  • 14569

End Page


  • 14583

Volume


  • 18

Issue


  • 19

Place Of Publication


  • Germany

Abstract


  • The seasonal evolution of O3 and its photochemical production regime in a polluted region of eastern China between 2014 and 2017 has been investigated using observations. We used tropospheric ozone (O3), carbon monoxide (CO), and formaldehyde (HCHO, a marker of VOCs (volatile organic compounds)) partial columns derived from high-resolution Fourier transform spectrometry (FTS); tropospheric nitrogen dioxide (NO2, a marker of NOx (nitrogen oxides)) partial column deduced from the Ozone Monitoring Instrument (OMI); surface meteorological data; and a back trajectory cluster analysis technique. A broad O3 maximum during both spring and summer (MAM/JJA) is observed; the day-to-day variations in MAM/JJA are generally larger than those in autumn and winter (SON/DJF). Tropospheric O3 columns in June are 1.55×1018moleculescm-2 (56DU (Dobson units)), and in December they are 1.05×1018moleculescm-2 (39 DU). Tropospheric O3 columns in June were ∼ 50% higher than those in December. Compared with the SON/DJF season, the observed tropospheric O3 levels in MAM/JJA are more influenced by the transport of air masses from densely populated and industrialized areas, and the high O3 level and variability in MAM/JJA is determined by the photochemical O3 production. The tropospheric-column HCHO/NO2 ratio is used as a proxy to investigate the photochemical O3 production rate (PO3). The results show that the PO3 is mainly nitrogen oxide (NOx) limited in MAM/JJA, while it is mainly VOC or mixed VOC-NOx limited in SON/DJF. Statistics show that NOx-limited, mixed VOC-NOx-limited, and VOC-limited PO3 accounts for 60.1%, 28.7%, and 11% of days, respectively. Considering most of PO3 is NOx limited or mixed VOC-NOx limited, reductions in NOx would reduce O3 pollution in eastern China.

Authors


  •   Sun, Youwen (external author)
  •   Liu, Cheng (external author)
  •   Palm, Mathias (external author)
  •   Vigouroux, C (external author)
  •   Notholt, Justus (external author)
  •   Hu, Qihou (external author)
  •   Jones, Nicholas B.
  •   Wang, Wei (external author)
  •   Su, Wenjing (external author)
  •   Zhang, Wenqiang (external author)
  •   Shan, Changong (external author)
  •   Tian, Yuan (external author)
  •   Xu, Xingwei (external author)
  •   de Maziere, Martine (external author)
  •   Zhou, Minqiang (external author)
  •   Liu, Jianguo (external author)

Publication Date


  • 2018

Citation


  • Sun, Y., Liu, C., Palm, M., Vigouroux, C., Notholt, J., Hu, Q., Jones, N., Wang, W., Su, W., Zhang, W., Shan, C., Tian, Y., Xu, X., de Maziere, M., Zhou, M. & Liu, J. (2018). Ozone seasonal evolution and photochemical production regime in the polluted troposphere in eastern China derived from high-resolution Fourier transform spectrometry (FTS) observations. Atmospheric Chemistry and Physics, 18 (19), 14569-14583.

Scopus Eid


  • 2-s2.0-85054871988

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=1367&context=smhpapers1

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers1/360

Number Of Pages


  • 14

Start Page


  • 14569

End Page


  • 14583

Volume


  • 18

Issue


  • 19

Place Of Publication


  • Germany