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Volume 16, issue 16
Atmos. Chem. Phys., 16, 10637-10650, 2016
https://doi.org/10.5194/acp-16-10637-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Atmos. Chem. Phys., 16, 10637-10650, 2016
https://doi.org/10.5194/acp-16-10637-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 26 Aug 2016

Research article | 26 Aug 2016

Significant increase of summertime ozone at Mount Tai in Central Eastern China

Lei Sun1, Likun Xue1, Tao Wang2,1, Jian Gao3, Aijun Ding4, Owen R. Cooper5,6, Meiyun Lin7,8, Pengju Xu9, Zhe Wang2, Xinfeng Wang1, Liang Wen1, Yanhong Zhu1, Tianshu Chen1, Lingxiao Yang1,10, Yan Wang10, Jianmin Chen1,10, and Wenxing Wang1 Lei Sun et al.
  • 1Environment Research Institute, Shandong University, Ji'nan, Shandong, China
  • 2Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hong Kong, China
  • 3Chinese Research Academy of Environmental Sciences, Beijing, China
  • 4Institute for Climate and Global Change Research and School of Atmospheric Sciences, Nanjing University, Nanjing, Jiangsu, China
  • 5Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, USA
  • 6NOAA Earth System Research Laboratory, Boulder, Colorado, USA
  • 7Atmospheric and Oceanic Sciences, Princeton University, Princeton, New Jersey, USA
  • 8NOAA Geophysical Fluid Dynamics Laboratory, Princeton, New Jersey, USA
  • 9School of Geography and Environment, Shandong Normal University, Ji'nan, Shandong, China
  • 10School of Environmental Science and Engineering, Shandong University, Ji'nan, Shandong, China

Abstract. Tropospheric ozone (O3) is a trace gas playing important roles in atmospheric chemistry, air quality and climate change. In contrast to North America and Europe, long-term measurements of surface O3 are very limited in China. We compile available O3 observations at Mt. Tai – the highest mountain over the North China Plain – during 2003–2015 and analyze the decadal change of O3 and its sources. A linear regression analysis shows that summertime O3 measured at Mt. Tai has increased significantly by 1.7ppbvyr−1 for June and 2.1ppbvyr−1 for the July–August average. The observed increase is supported by a global chemistry-climate model hindcast (GFDL-AM3) with O3 precursor emissions varying from year to year over 1980–2014. Analysis of satellite data indicates that the O3 increase was mainly due to the increased emissions of O3 precursors, in particular volatile organic compounds (VOCs). An important finding is that the emissions of nitrogen oxides (NOx) have diminished since 2011, but the increase of VOCs appears to have enhanced the ozone production efficiency and contributed to the observed O3 increase in central eastern China. We present evidence that controlling NOx alone, in the absence of VOC controls, is not sufficient to reduce regional O3 levels in North China in a short period.

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We compiled the available observations of surface O3 at Mt. Tai – the highest mountain in the North China Plain, and found a significant increase of O3 concenrations from 2003 to 2015. The observed O3 increase was mainly due to the increase of O3 precursors, especially VOCs. Our analysis shows that controlling NOx alone, in the absence of VOC controls, is not sufficient to reduce regional O3 levels in North China in a short period.
We compiled the available observations of surface O3 at Mt. Tai – the highest mountain in the...
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