TY - JOUR
T1 - Long-range transport impacts on surface aerosol concentrations and the contributions to haze events in China
T2 - An HTAP2 multi-model study
AU - Dong, Xinyi
AU - Fu, Joshua S.
AU - Zhu, Qingzhao
AU - Sun, Jian
AU - Tan, Jiani
AU - Keating, Terry
AU - Sekiya, Takashi
AU - Sudo, Kengo
AU - Emmons, Louisa
AU - Tilmes, Simone
AU - Eiof Jonson, Jan
AU - Schulz, Michael
AU - Bian, Huisheng
AU - Chin, Mian
AU - Davila, Yanko
AU - Henze, Daven
AU - Takemura, Toshihiko
AU - Maria Katarina Benedictow, Anna
AU - Huang, Kan
N1 - Funding Information:
Acknowledgements. This work was partly supported by the Natural Science Foundation of China (41429501). We would like to thank the UN-ECE CLRTAP (EMEP), AMAP, and NILU for supporting the EBAS database with air pollutant measurements. We thank Keiichi Sato and Ayako Aoyagi from Asia Center for Air Pollution Research for providing the EANET data. We would also like to acknowledge NOAA NCDC for providing the public accessible meteorology observations. We thank the Oak Ridge Leadership Computing Facility (OLCF) at Oak Ridge National Lab (ORNL) for providing computational sources. Funding for open access to this research was provided by University of Tennessee’s Open Publishing Support Fund.
Publisher Copyright:
© Author(s) 2018.
PY - 2018/10/30
Y1 - 2018/10/30
N2 - Haze has been severely affecting the densely populated areas in China recently. While many of the efforts have been devoted to investigating the impact of local anthropogenic emission, limited attention has been paid to the contribution from long-range transport. In this study, we apply simulations from six participating models supplied through the Task Force on Hemispheric Transport of Air Pollution phase 2 (HTAP2) exercise to investigate the long-range transport impact of Europe (EUR) and Russia-Belarus-Ukraine (RBU) on the surface air quality in eastern Asia (EAS), with special focus on their contributions during the haze episodes in China. The impact of 20 % anthropogenic emission perturbation from the source region is extrapolated by a factor of 5 to estimate the full impact. We find that the full impacts from EUR and RBU are 0.99 μgĝ€†mĝ'3 (3.1 %) and 1.32 μgĝ€†mĝ'3 (4.1 %) during haze episodes, while the annual averaged full impacts are only 0.35 μgĝ€†mĝ'3 (1.7 %) and 0.53 μgĝ€†mĝ'3 (2.6 %). By estimating the aerosol response within and above the planetary boundary layer (PBL), we find that long-range transport from EUR within the PBL contributes to 22-38 % of the total column density of aerosol response in EAS. Comparison with the HTAP phase 1 (HTAP1) assessment reveals that from 2000 to 2010, the long-range transport from Europe to eastern Asia has decreased significantly by a factor of 2-10 for surface aerosol mass concentration due to the simultaneous emission reduction in source regions and emission increase in the receptor region. We also find the long-range transport from the Europe and RBU regions increases the number of haze events in China by 0.15 % and 0.11 %, and the North China Plain and southeastern China has 1-3 extra haze days ( < 3 %). This study is the first investigation into the contribution of long-range transport to haze in China with multi-model experiments.
AB - Haze has been severely affecting the densely populated areas in China recently. While many of the efforts have been devoted to investigating the impact of local anthropogenic emission, limited attention has been paid to the contribution from long-range transport. In this study, we apply simulations from six participating models supplied through the Task Force on Hemispheric Transport of Air Pollution phase 2 (HTAP2) exercise to investigate the long-range transport impact of Europe (EUR) and Russia-Belarus-Ukraine (RBU) on the surface air quality in eastern Asia (EAS), with special focus on their contributions during the haze episodes in China. The impact of 20 % anthropogenic emission perturbation from the source region is extrapolated by a factor of 5 to estimate the full impact. We find that the full impacts from EUR and RBU are 0.99 μgĝ€†mĝ'3 (3.1 %) and 1.32 μgĝ€†mĝ'3 (4.1 %) during haze episodes, while the annual averaged full impacts are only 0.35 μgĝ€†mĝ'3 (1.7 %) and 0.53 μgĝ€†mĝ'3 (2.6 %). By estimating the aerosol response within and above the planetary boundary layer (PBL), we find that long-range transport from EUR within the PBL contributes to 22-38 % of the total column density of aerosol response in EAS. Comparison with the HTAP phase 1 (HTAP1) assessment reveals that from 2000 to 2010, the long-range transport from Europe to eastern Asia has decreased significantly by a factor of 2-10 for surface aerosol mass concentration due to the simultaneous emission reduction in source regions and emission increase in the receptor region. We also find the long-range transport from the Europe and RBU regions increases the number of haze events in China by 0.15 % and 0.11 %, and the North China Plain and southeastern China has 1-3 extra haze days ( < 3 %). This study is the first investigation into the contribution of long-range transport to haze in China with multi-model experiments.
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U2 - 10.5194/acp-18-15581-2018
DO - 10.5194/acp-18-15581-2018
M3 - Article
AN - SCOPUS:85055774346
SN - 1680-7316
VL - 18
SP - 15581
EP - 15600
JO - Atmospheric Chemistry and Physics
JF - Atmospheric Chemistry and Physics
IS - 21
ER -