Rapid increase in spring ozone in the Pearl River Delta, China during 2013-2022

IF 8.5 1区 地球科学 Q1 METEOROLOGY & ATMOSPHERIC SCIENCES
Tianhui Cao, Haichao Wang, Xiaorui Chen, Lei Li, Xiao Lu, Keding Lu, Shaojia Fan
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Abstract

Surface ozone pollution is a severe air pollution problem and typically occurs in the warm season since it is driven by photochemistry. Recent studies showed a tendency for ozone pollution to spread into the cold season. Yet, less attention was paid to its evolution and causes. Here, we show general uptrends in surface ozone of 1.15 ppbv a−1 during the spring (March to May) over the past decade (2013–2022) in the Pearl River Delta, China. The meteorological shift, primarily the increase in northerly airflow at the 850hPa level and the rise in net surface solar radiation flux (SSR), accounted for 77% of the ozone growth, as determined by the multiple linear regression model. The change in three meteorological factors, namely SSR, U10, and V850, especially in the stagnant weather conditions, are critical in driving spring ozone increase, and their relative importance differs between inland and coastal regions. These results show that the meteorological-induced springtime ozone pollution warrants vigilance, as spring ozone pollution control in climate-sensitive areas, will be more challenging towards climate change.

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来源期刊
npj Climate and Atmospheric Science
npj Climate and Atmospheric Science Earth and Planetary Sciences-Atmospheric Science
CiteScore
8.80
自引率
3.30%
发文量
87
审稿时长
21 weeks
期刊介绍: npj Climate and Atmospheric Science is an open-access journal encompassing the relevant physical, chemical, and biological aspects of atmospheric and climate science. The journal places particular emphasis on regional studies that unveil new insights into specific localities, including examinations of local atmospheric composition, such as aerosols. The range of topics covered by the journal includes climate dynamics, climate variability, weather and climate prediction, climate change, ocean dynamics, weather extremes, air pollution, atmospheric chemistry (including aerosols), the hydrological cycle, and atmosphere–ocean and atmosphere–land interactions. The journal welcomes studies employing a diverse array of methods, including numerical and statistical modeling, the development and application of in situ observational techniques, remote sensing, and the development or evaluation of new reanalyses.
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