Fluctuations in the “static” atmosphere and their effects on tropospheric ozone distribution

IF 1.8 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-06-01 DOI:10.1016/j.jastp.2024.106268

Jiang Xiaofei , Wang Jizhi , Yang Yuanqin , Liu Pan , Deng Guo , Yao Shuang , Xiao Yang

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Abstract

Atmospheric fluctuation can be seen everywhere. This study focuses on the record-breaking increase of O₃ concentration during the summer in some sensitive areas in recent years. The findings indicate that in the vicinity of the East Asian continent near western Pacific ocean, when the atmospheric conditions are stable or neutral, it is conducive to the maintenance and propagation of atmospheric oscillations near the height of the pollutant mixed layer (H_PML). Accompanied by the "peak-trough" effect of external gravity wave oscillations, due to the abundant water vapor of the cloud system (there are low pressure or typhoon disturbances in summer) near the large-scale cloud belt at the edge of the subtropical high in the western Pacific, the bright temperature at cloud top shows "light and dark changes" on satellite images, forming a wave-like cloud system. The novelty of this study lies in the fact that atmospheric fluctuations near the H_PML is not only related to the known aggravation of heavy rainfall, but also leads to the additional value-added effect of aerosols. Under static atmospheric conditions, the impact of atmospheric fluctuations near the H_PML on additional rise of O₃ concentration helps us to deepen our understanding of the so-called "entrained ozone (EZ) effect" in the atmosphere. Due to the external gravity waves, the concentration of O₃ increased further. Diurnal variations of solar zenith angle and H_PML are key meteorological factors influencing the significant increase in near-surface O₃ concentration entrainment. The formation mechanism of solar photochemical O₃ is further deepened and supplemented by analyzing the record-breaking increase of O₃ concentration in summer observed in recent years.

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静态 "大气中的波动及其对对流层臭氧分布的影响

大气波动随处可见。本研究主要关注近年来一些敏感地区夏季臭氧浓度破纪录的上升。研究结果表明，在西太平洋附近的东亚大陆附近，当大气条件稳定或中性时，有利于污染物混合层（H_PML）高度附近大气振荡的维持和传播。伴随着外部重力波振荡的 "峰-槽 "效应，由于西太平洋副热带高压边缘大尺度云带附近云系水汽丰富（夏季有低压或台风扰动），云顶亮温在卫星图像上呈现 "明暗变化"，形成波状云系。这项研究的新颖之处在于，H_PML 附近的大气波动不仅与已知的强降雨加剧有关，还导致气溶胶的额外增值效应。在静态大气条件下，H_PML 附近的大气波动对 O3 浓度额外上升的影响有助于我们加深对大气中所谓 "夹带臭氧（EZ）效应 "的理解。在外部引力波的作用下，O3 的浓度进一步上升。太阳天顶角和 H_PML 的日变化是影响近地面 O3 浓度夹带显著增加的关键气象因素。通过分析近年来观测到的夏季 O3 浓度破纪录的增长，进一步深化和补充了太阳光化学 O3 的形成机制。

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来源期刊

Journal of Atmospheric and Solar-Terrestrial Physics 地学-地球化学与地球物理

CiteScore

4.10

自引率

5.30%

发文量

审稿时长

6 months

期刊介绍： The Journal of Atmospheric and Solar-Terrestrial Physics (JASTP) is an international journal concerned with the inter-disciplinary science of the Earth''s atmospheric and space environment, especially the highly varied and highly variable physical phenomena that occur in this natural laboratory and the processes that couple them. The journal covers the physical processes operating in the troposphere, stratosphere, mesosphere, thermosphere, ionosphere, magnetosphere, the Sun, interplanetary medium, and heliosphere. Phenomena occurring in other "spheres", solar influences on climate, and supporting laboratory measurements are also considered. The journal deals especially with the coupling between the different regions. Solar flares, coronal mass ejections, and other energetic events on the Sun create interesting and important perturbations in the near-Earth space environment. The physics of such "space weather" is central to the Journal of Atmospheric and Solar-Terrestrial Physics and the journal welcomes papers that lead in the direction of a predictive understanding of the coupled system. Regarding the upper atmosphere, the subjects of aeronomy, geomagnetism and geoelectricity, auroral phenomena, radio wave propagation, and plasma instabilities, are examples within the broad field of solar-terrestrial physics which emphasise the energy exchange between the solar wind, the magnetospheric and ionospheric plasmas, and the neutral gas. In the lower atmosphere, topics covered range from mesoscale to global scale dynamics, to atmospheric electricity, lightning and its effects, and to anthropogenic changes.