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Impacts of Ozone‐Vegetation Interactions on Ozone Pollution Episodes in North China and the Yangtze River Delta
Author(s) -
Gong Cheng,
Liao Hong,
Yue Xu,
Ma Yimian,
Lei Yadong
Publication year - 2021
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2021gl093814
Subject(s) - delta , ozone , environmental science , vegetation (pathology) , china , yangtze river , pollution , atmospheric sciences , air pollution , deposition (geology) , biosphere , climatology , megalopolis , physical geography , environmental chemistry , hydrology (agriculture) , geography , meteorology , geology , ecology , chemistry , geomorphology , medicine , archaeology , pathology , aerospace engineering , sediment , engineering , biology , economic geography , geotechnical engineering
Persistent ozone (O 3 ) pollution episodes (OPEs, with regionally averaged maximum daily 8‐h average (MDA8) O 3 concentration exceeding 80 ppbv and lasting for 5 days or longer) occurred frequently in megalopolis over eastern China in recent years. Here, we apply a newly developed chemistry‐biosphere model (GEOS‐Chem‐YIBs) to comprehensively quantify the vegetation contributions to OPEs in North China and Yangtze River Delta (YRD) over May to October in 2014–2017. The simulated MDA8 O 3 concentrations increases 16.7 and 16.6 ppbv) during OPEs in North China and YRD, of which about 1.4 ppbv (8.4%) and 3.8 ppbv (22.9%) are caused by the processes including increased BVOC emissions and reduced stomatal dry deposition. Furthermore, the O 3 damages to vegetation stomata slightly increase seasonal‐mean O 3 concentrations by <1 ppbv, but such effects are not exacerbated during OPEs despite the high O 3 exposure.
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