Enhanced understanding of atmospheric blocking modulation on ozone dynamics within a high-resolution Earth system model DOI Creative Commons

Wenbin Kou,

Yang Gao, Dan Tong

и другие.

Atmospheric chemistry and physics, Год журнала: 2025, Номер 25(5), С. 3029 - 3048

Опубликована: Март 14, 2025

Abstract. High surface ozone concentrations pose substantial health risks, yet understanding the factors influencing levels, especially role of large-scale circulations, remains incomplete. A key challenge is accurately modeling both circulations and concentrations. Using a high-resolution Earth system model (25 km atmospheric resolution), we explore how local meteorology affect levels. Our results show that heat waves can trigger increases in by stimulating biogenic volatile organic compound (BVOC) emissions during summers 2015–2019. For example, maximum daily 8 h (MDA8) increase 12.0 ppbv southeastern US, 9.7 Europe, 17.6 North China, 9.0 central eastern China compared to non-heat-wave periods. In addition effects, blocking strongly influences downstream meteorological conditions formation. Focusing on pollution identify three major pathways Rossby wave propagation based locations: Euro-Atlantic sector, northern Russia, Pacific. These lead increased air temperature intensify downward solar radiation downstream. The impact most pronounced where MDA8 5.9 10.7 non-blocking periods, followed (2.1 4.9 ppbv). Blocking also stimulates BVOC emissions, enhancing 10.6 15.9 these regions. findings highlight critical circulation shaping regional quality, under warming climate.

Язык: Английский

Reducing Long‐Standing Surface Ozone Overestimation in Earth System Modeling by High‐Resolution Simulation and Dry Deposition Improvement DOI Creative Commons
Yang Gao,

Wenbin Kou,

Wenxuan Cheng

и другие.

Journal of Advances in Modeling Earth Systems, Год журнала: 2025, Номер 17(3)

Опубликована: Март 1, 2025

Abstract The overestimation of surface ozone concentration in low‐resolution global atmospheric chemistry and climate models has been a long‐standing issue. We first update the dry deposition scheme both high‐ (0.25°) (1°) Community Earth System Model (CESM) version 1.3 runs, by adding effects leaf area index correcting sunlit shaded fractions stomatal resistances. With this update, 5‐year‐long summer simulations (2015–2019) using CESM still exhibit substantial (by 6.0–16.2 ppbv) over U.S., Europe, eastern China, pollution hotspots. is further improved adjusting cuticle conductance, reducing mean bias 19%, increasing model resolution reduces 43%. elucidate mechanism which grid spacing influences simulated ozone, revealing distinctive pathways urban versus rural areas. In areas, mainly affects daytime levels, where additional NO x emissions from nearby areas result an boost simulations. contrast, follows similar due to influence volatile organic compounds surrounding However, nighttime closely linked weakened titration owing redistribution Additionally, stratosphere‐troposphere exchange may also contribute high‐resolution simulations, warranting investigation. This optimized enhance understanding formation mechanisms, sources, changes warming climate.

Язык: Английский

Процитировано

2
Advancing high-resolution modeling to unravel the interplay between extreme weather events and air pollution under global warming DOI Creative Commons
Yang Gao,

Xiuwen Guo,

Wenbin Kou

и другие.

Frontiers of Environmental Science & Engineering, Год журнала: 2025, Номер 19(7)

Опубликована: Май 19, 2025

Язык: Английский

Процитировано

0
Enhanced understanding of atmospheric blocking modulation on ozone dynamics within a high-resolution Earth system model DOI Creative Commons

Wenbin Kou,

Yang Gao, Dan Tong

и другие.

Atmospheric chemistry and physics, Год журнала: 2025, Номер 25(5), С. 3029 - 3048

Опубликована: Март 14, 2025

Abstract. High surface ozone concentrations pose substantial health risks, yet understanding the factors influencing levels, especially role of large-scale circulations, remains incomplete. A key challenge is accurately modeling both circulations and concentrations. Using a high-resolution Earth system model (25 km atmospheric resolution), we explore how local meteorology affect levels. Our results show that heat waves can trigger increases in by stimulating biogenic volatile organic compound (BVOC) emissions during summers 2015–2019. For example, maximum daily 8 h (MDA8) increase 12.0 ppbv southeastern US, 9.7 Europe, 17.6 North China, 9.0 central eastern China compared to non-heat-wave periods. In addition effects, blocking strongly influences downstream meteorological conditions formation. Focusing on pollution identify three major pathways Rossby wave propagation based locations: Euro-Atlantic sector, northern Russia, Pacific. These lead increased air temperature intensify downward solar radiation downstream. The impact most pronounced where MDA8 5.9 10.7 non-blocking periods, followed (2.1 4.9 ppbv). Blocking also stimulates BVOC emissions, enhancing 10.6 15.9 these regions. findings highlight critical circulation shaping regional quality, under warming climate.

Язык: Английский

Процитировано

0