首页|Large-scale land-sea interactions extend ozone pollution duration in coastal cities along northern China

Large-scale land-sea interactions extend ozone pollution duration in coastal cities along northern China

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Land-sea atmosphere interaction(LSAI)is one of the important processes affecting ozone(O3)pollution in coastal areas.The effects of small-scale LSAIs like sea-land breezes have been widely studied.However,it is not fully clear how and to what extent the large-scale LSAIs affect O3 pollution.Here we explored an O3 episode to illuminate the role of large-scale LSAIs in O3 pollution over the Bohai-Yellow Seas and adjacent areas through observations and model simulations.The results show that the northern Bohai Sea's coastal region,influenced by the Mongolian High,initially experienced a typical unimodal diurnal O3 variation for three days,when O3 precursors from Beijing-Tianjin-Hebei,Shandong,and Northeast China were transported to the Bohai-Yellow Seas.Photochemical reactions generated O3 within marine air masses,causing higher O3 levels over the seas than coastal regions.As the Mongolian High shifted eastward and expanded,southerly winds on its western edge transported O3-rich marine air masses toward the coast,prolonging pollution for an additional three days and weakening diurnal variations.Subsequently,emissions from the Korean Peninsula and marine shipping significantly affected O3 levels in the northern Bohai Sea(10.7％and 13.7％,respectively).Notably,Shandong's emissions played a substantial role in both phases(27.5％and 26.1％,respectively).These findings underscore the substantial impact of large-scale LSAIs driven by the Mongolian High on O3 formation and pollution duration in coastal cities.This insight helps understand and manage O3 pollution in northern Bohai Sea cities and broadly applies to temperate coastal cities worldwide.

Mongolian highSource apportionmentWRF-CMAQSea-crossing transport

Lars-Otto Reiersen、Katrin Vorkamp、Roland Kallenborn、Yang Shen、Huan Liu、Hai Guo、Xiaopu Lyu、Mengwei Jia、Chenxi Lou

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Arctic Knowledge Ltd,Former Executive Secretary,Arctic Monitoring and Assessment Programme(AMAP),Oslo,Norway

Department of Environmental Science,Aarhus University,Roskilde,Denmark

International Joint Research Center for Arctic Environment and Ecosystem(IJRC-AEE),Polar Academy(PA),Harbin Institute of Technology,Harbin,PR China

Faculty of Chemistry,Biotechnology and Food Science,Norwegian University of Life Sciences(NMBU),Ås,Norway

University of the Arctic(UArctic),Rovaniemi,Finland

Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology,International Institute for Earth System Science,Nanjing University,Nanjing,210023,China

School of Environment,Tsinghua University,Beijing,100084,China

Air Quality Studies,Department of Civil and Environmental Engineering,Hong Kong Polytechnic University,Hong Kong,China

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国家重点研发计划Research Funds for the Frontiers Science Center for Critical Earth Material Cycling,Nanjing University

2022YFC3703505090414380031

2024

10.1016/j.ese.2023.100322

环境科学与生态技术(英文)

环境科学与生态技术(英文)

ISSN：
年,卷(期)：2024.18(1)
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