Spatiotemporal Dynamics of Surface Ozone and Its Relationship with Meteorological Factors over the Beijing–Tianjin–Tangshan Region, China, from 2016 to 2019

Abstract

In recent years, ozone pollution has been increasing in some parts of the world. In this study, we used the Beijing–Tianjin–Tangshan (BJ-TJ-TS) urban agglomeration region as a case study and used satellite remotely sensed inversion data and hourly ground monitoring observations of surface ozone concentrations, meteorological data, and other factors from 2016 to 2019 to explore the spatiotemporal dynamic characteristics of surface ozone concentration and its pollution levels. We also investigated their coupling relationships with meteorological factors, including temperature, pressure, relative humidity, wind velocity, and sunshine duration, in order to support the development of effective control measures for regional ozone pollution. The results revealed that the surface ozone concentration throughout the BJ-TJ-TS region from 2016 to 2019 exhibited an overall pattern of high values in the northwest and low values in the southeast, as well as an obvious difference between built-up and non-built-up areas (especially in Beijing). Meanwhile, a notable increasing trend of ozone levels was discovered in the BJ and TJ areas from 2016 to 2019, whereas this upward trend was not evident in the TS area. In all three areas, the highest monthly average ozone values occurred in the summer month of June, while the lowest monthly average levels occurred in the winter month of December. Their diurnal variation values reached a maximum value at approximately 3:00–4:00 p.m. and a minimum value at approximately 7:00 a.m. It is clear that high temperature, long sunshine duration, low atmospheric pressure, and weak wind velocity conditions, as well as certain relative humidity levels, readily led to high-concentration ozone pollution. Meanwhile, the daily average values of the five meteorological factors on days with Grade I and Grade II ozone pollution displayed different characteristics.

Interactive effects of atmospheric oxidising pollutants and heat waves on the risk of residential mortality

“…High temperatures, O 3 and NO 2 might truly work in concert. High temperatures, prolonged sunshine, and other meteorological factors aid the production of ozone [ 57 ], the primary photochemical pollutant, which is created when atomic and molecular oxygen mix quickly. Ultraviolet radiation causes NO 2 to breakdown into nitrogen oxides (NO) and atomic oxygen, a result of the photochemical production process of NO 2 [ 58 ].…”

Characteristics and Sensitivity Analysis of Ozone Pollution in a Typical Inland City in China

“…Ozone is generated from a series of complex photochemical reactions, which could be affected by external factors such as temperature, humidity, and wind speed [18,19], where temperature and humidity determine the reaction rate of ozone generation, and wind speed has a diffusion effect on the atmosphere [20]. Relevant studies show that temperatures and extended solar radiation could promote photochemical reactions, resulting in increasing ozone levels, which are attributed to the ability of solar radiation to initiate photochemical reactions between nitrogen oxides and volatile organic compounds in the atmosphere.…”