Substantial ozone enhancement over the North China Plain from increased biogenic emissions due to heat waves and land cover in summer 2017

Substantial ozone enhancement over the North China Plain from increased biogenic emissions due to heat waves and land cover in summer 2017

<p>In the summer of 2017, heavy ozone pollution swamped most of the North China Plain (NCP), with the maximum regional average of daily maximum 8&thinsp;h ozone concentration (MDA8) reaching almost 120&thinsp;ppbv. In light of the continuing reduction of anthropogenic emissions in Chin...

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Main Authors: M. Ma, Y. Gao, Y. Wang, S. Zhang, L. R. Leung, C. Liu, S. Wang, B. Zhao, X. Chang, H. Su, T. Zhang, L. Sheng, X. Yao, H. Gao
Format: Article
Language:English
Published: Copernicus Publications 2019-10-01
Series:Atmospheric Chemistry and Physics
Online Access:https://www.atmos-chem-phys.net/19/12195/2019/acp-19-12195-2019.pdf
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author M. Ma
Y. Gao
Y. Gao
Y. Wang
S. Zhang
S. Zhang
S. Zhang
S. Zhang
L. R. Leung
C. Liu
C. Liu
C. Liu
C. Liu
S. Wang
B. Zhao
X. Chang
H. Su
T. Zhang
L. Sheng
X. Yao
X. Yao
H. Gao
H. Gao
spellingShingle M. Ma
Y. Gao
Y. Gao
Y. Wang
S. Zhang
S. Zhang
S. Zhang
S. Zhang
L. R. Leung
C. Liu
C. Liu
C. Liu
C. Liu
S. Wang
B. Zhao
X. Chang
H. Su
T. Zhang
L. Sheng
X. Yao
X. Yao
H. Gao
H. Gao
Substantial ozone enhancement over the North China Plain from increased biogenic emissions due to heat waves and land cover in summer 2017
Atmospheric Chemistry and Physics
author_facet M. Ma
Y. Gao
Y. Gao
Y. Wang
S. Zhang
S. Zhang
S. Zhang
S. Zhang
L. R. Leung
C. Liu
C. Liu
C. Liu
C. Liu
S. Wang
B. Zhao
X. Chang
H. Su
T. Zhang
L. Sheng
X. Yao
X. Yao
H. Gao
H. Gao
author_sort M. Ma
title Substantial ozone enhancement over the North China Plain from increased biogenic emissions due to heat waves and land cover in summer 2017
title_short Substantial ozone enhancement over the North China Plain from increased biogenic emissions due to heat waves and land cover in summer 2017
title_full Substantial ozone enhancement over the North China Plain from increased biogenic emissions due to heat waves and land cover in summer 2017
title_fullStr Substantial ozone enhancement over the North China Plain from increased biogenic emissions due to heat waves and land cover in summer 2017
title_full_unstemmed Substantial ozone enhancement over the North China Plain from increased biogenic emissions due to heat waves and land cover in summer 2017
title_sort substantial ozone enhancement over the north china plain from increased biogenic emissions due to heat waves and land cover in summer 2017
publisher Copernicus Publications
series Atmospheric Chemistry and Physics
issn 1680-7316
1680-7324
publishDate 2019-10-01
description <p>In the summer of 2017, heavy ozone pollution swamped most of the North China Plain (NCP), with the maximum regional average of daily maximum 8&thinsp;h ozone concentration (MDA8) reaching almost 120&thinsp;ppbv. In light of the continuing reduction of anthropogenic emissions in China, the underlying mechanisms for the occurrences of these regional extreme ozone episodes are elucidated from two perspectives: meteorology and biogenic emissions. The significant positive correlation between MDA8 ozone and temperature, which is amplified during heat waves concomitant with stagnant air and no precipitation, supports the crucial role of meteorology in driving high ozone concentrations. We also find that biogenic emissions are enhanced due to factors previously not considered. During the heavy ozone pollution episodes in June 2017, biogenic emissions driven by high vapor pressure deficit (VPD), land cover change and urban landscape yield an extra mean MDA8 ozone of 3.08, 2.79 and 4.74&thinsp;ppbv, respectively, over the NCP, which<span id="page12196"/> together contribute as much to MDA8 ozone as biogenic emissions simulated using the land cover of 2003 and ignoring VPD and urban landscape. In Beijing, the biogenic emission increase due to urban landscape has a comparable effect on MDA8 ozone to the combined effect of high VPD and land cover change between 2003 and 2016. In light of the large effect of urban landscape on biogenic emission and the subsequent ozone formation, the types of trees may be cautiously selected to take into account of the biogenic volatile organic compound (BVOC) emission during the afforestation of cities. This study highlights the vital contributions of heat waves, land cover change and urbanization to the occurrence of extreme ozone episodes, with significant implications for ozone pollution control in a future when heat wave frequency and intensity are projected to increase under global warming.</p>
url https://www.atmos-chem-phys.net/19/12195/2019/acp-19-12195-2019.pdf
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spelling doaj-19b808703c9848c5ac51b56a075ff51c2020-11-24T20:44:59ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242019-10-0119121951220710.5194/acp-19-12195-2019Substantial ozone enhancement over the North China Plain from increased biogenic emissions due to heat waves and land cover in summer 2017M. Ma0Y. Gao1Y. Gao2Y. Wang3S. Zhang4S. Zhang5S. Zhang6S. Zhang7L. R. Leung8C. Liu9C. Liu10C. Liu11C. Liu12S. Wang13B. Zhao14X. Chang15H. Su16T. Zhang17L. Sheng18X. Yao19X. Yao20H. Gao21H. Gao22Key Laboratory of Marine Environment and Ecology, Ministry of Education/Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, ChinaKey Laboratory of Marine Environment and Ecology, Ministry of Education/Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, ChinaQingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, ChinaSchool of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USAQingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, ChinaKey Laboratory of Physical Oceanography, Ministry of Education/Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, ChinaInternational Laboratory for High-Resolution Earth System Prediction (iHESP), Qingdao, 266237, ChinaCollege of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, ChinaAtmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99354, USAKey Lab of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, ChinaSchool of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, ChinaCenter for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, ChinaAnhui Province Key Laboratory of Polar Environment and Global Change, USTC, Hefei, 230026, ChinaState Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, ChinaAtmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99354, USAState Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, ChinaMax Planck Institute for Chemistry, Multiphase Chemistry Department, 55128 Mainz, GermanyKey Laboratory of Marine Environment and Ecology, Ministry of Education/Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, ChinaCollege of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, ChinaKey Laboratory of Marine Environment and Ecology, Ministry of Education/Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, ChinaLaboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, ChinaKey Laboratory of Marine Environment and Ecology, Ministry of Education/Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266100, ChinaLaboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China<p>In the summer of 2017, heavy ozone pollution swamped most of the North China Plain (NCP), with the maximum regional average of daily maximum 8&thinsp;h ozone concentration (MDA8) reaching almost 120&thinsp;ppbv. In light of the continuing reduction of anthropogenic emissions in China, the underlying mechanisms for the occurrences of these regional extreme ozone episodes are elucidated from two perspectives: meteorology and biogenic emissions. The significant positive correlation between MDA8 ozone and temperature, which is amplified during heat waves concomitant with stagnant air and no precipitation, supports the crucial role of meteorology in driving high ozone concentrations. We also find that biogenic emissions are enhanced due to factors previously not considered. During the heavy ozone pollution episodes in June 2017, biogenic emissions driven by high vapor pressure deficit (VPD), land cover change and urban landscape yield an extra mean MDA8 ozone of 3.08, 2.79 and 4.74&thinsp;ppbv, respectively, over the NCP, which<span id="page12196"/> together contribute as much to MDA8 ozone as biogenic emissions simulated using the land cover of 2003 and ignoring VPD and urban landscape. In Beijing, the biogenic emission increase due to urban landscape has a comparable effect on MDA8 ozone to the combined effect of high VPD and land cover change between 2003 and 2016. In light of the large effect of urban landscape on biogenic emission and the subsequent ozone formation, the types of trees may be cautiously selected to take into account of the biogenic volatile organic compound (BVOC) emission during the afforestation of cities. This study highlights the vital contributions of heat waves, land cover change and urbanization to the occurrence of extreme ozone episodes, with significant implications for ozone pollution control in a future when heat wave frequency and intensity are projected to increase under global warming.</p>https://www.atmos-chem-phys.net/19/12195/2019/acp-19-12195-2019.pdf

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