Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
ENSO modulation of summertime tropospheric ozone over China
Ozone (O _3 ) is one of the most critical pollutants affecting air quality in China in recent years. In this study, different impacts of the El Niño–Southern Oscillation (ENSO) warm/cold phases on summertime tropospheric O _3 over China are examined based on model simulations, ground measurements, and reanalysis data. Summertime surface O _3 concentrations in China show a positive correlation with ENSO index during years 1990–2019, with the largest increases by 20% over southern China in El Niño (warm phase) relative to La Niña (cold phase) years. The ENSO modulation extends to the middle and even upper troposphere. Our analysis indicates that O _3 flux convergence associated with weakened southerlies is the primary reason for the increase in tropospheric O _3 over southern China. In addition, the O _3 increase during El Niño years is mainly from domestic emissions in China. This study highlights the potential significance of ENSO in modulating tropospheric O _3 concentrations in China, with great implications for O _3 pollution mitigation.
ENSO modulation of summertime tropospheric ozone over China
Ozone (O _3 ) is one of the most critical pollutants affecting air quality in China in recent years. In this study, different impacts of the El Niño–Southern Oscillation (ENSO) warm/cold phases on summertime tropospheric O _3 over China are examined based on model simulations, ground measurements, and reanalysis data. Summertime surface O _3 concentrations in China show a positive correlation with ENSO index during years 1990–2019, with the largest increases by 20% over southern China in El Niño (warm phase) relative to La Niña (cold phase) years. The ENSO modulation extends to the middle and even upper troposphere. Our analysis indicates that O _3 flux convergence associated with weakened southerlies is the primary reason for the increase in tropospheric O _3 over southern China. In addition, the O _3 increase during El Niño years is mainly from domestic emissions in China. This study highlights the potential significance of ENSO in modulating tropospheric O _3 concentrations in China, with great implications for O _3 pollution mitigation.
ENSO modulation of summertime tropospheric ozone over China
Yang Yang (Autor:in) / Mengyun Li (Autor:in) / Hailong Wang (Autor:in) / Huimin Li (Autor:in) / Pinya Wang (Autor:in) / Ke Li (Autor:in) / Meng Gao (Autor:in) / Hong Liao (Autor:in)
2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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