Stratospheric influence on surface ozone pollution in China

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: May 14, 2024

Abstract Events of stratospheric intrusions to the surface (SITS) can lead severe ozone (O 3 ) pollution. Still, what extent SITS events impact O on a national scale over years remains long-lasting question, mainly due difficulty resolving three key metrics: frequency, duration and intensity. Here, we identify 27,616 China during 2015-2022 based spatiotemporally dense measurements carbon monoxide, two effective indicators SITS. An overview metrics is presented, illustrating large influences in China. We find that occur preferentially high-elevation regions, while those plain regions are more intense. enhances by 20 ppbv average, contributing 30-45% periods. Nationally, SITS-induced peaks spring autumn, 70% warm months exacerbate Over 2015-2022, shows declining trend. Our observation-based results have implications for mitigation policies short long terms.

Language: Английский

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Multi-decadal variability controls short-term stratospheric water vapor trends

Communications Earth & Environment, Journal Year: 2023, Volume and Issue: 4(1)

Published: Nov. 27, 2023

Language: Английский

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Impact of Methane Emissions on Future Stratospheric Ozone Recovery

Advances in Atmospheric Sciences, Journal Year: 2025, Volume and Issue: unknown

Published: March 5, 2025

Language: Английский

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Functional analyses revealed Pinus radiata CHLOROPLAST SENSOR KINASE as a key component in UV-B stress and development

Plant Stress, Journal Year: 2025, Volume and Issue: unknown, P. 100796 - 100796

Published: March 1, 2025

Language: Английский

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Stratospheric Ozone Loss Enhances Summer Precipitation Over the Southern Slope of the Tibetan Plateau

Geophysical Research Letters, Journal Year: 2023, Volume and Issue: 50(15)

Published: Aug. 8, 2023

Abstract Heavy summer precipitation over the southern slope of Tibetan Plateau has dramatic influences on water resources and hydrological disasters in South Asia. It experienced increasing trends 1979–1996 decreasing 1996–2022, which are not yet well understood. Here we show observational numerical evidence that stratospheric ozone significant impacts long‐term this strong convection area. is found depletion, by modulating lower temperature upper‐tropospheric static stability, enhances deep Plateau. The results suggest recovery future may reduce first half 21st century, would be imperative for resource management

Language: Английский

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Environmental impacts of fertilization during rice production in saline-alkali paddy fields based on life cycle assessment

Journal of Cleaner Production, Journal Year: 2024, Volume and Issue: 467, P. 142947 - 142947

Published: June 19, 2024

Language: Английский

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Microbially mediated mechanisms underlie the increased soil N2O emissions under nitrogen fertilization in purple soil

Applied Soil Ecology, Journal Year: 2024, Volume and Issue: 204, P. 105725 - 105725

Published: Nov. 2, 2024

Language: Английский

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Maize residue input rather than cover cropping influenced N2O emissions and soil–crop N dynamics during the intercrop and cash crop periods

Agriculture Ecosystems & Environment, Journal Year: 2023, Volume and Issue: 363, P. 108873 - 108873

Published: Dec. 29, 2023

The well-known benefits of cover cropping for mitigating climate change and improving soil quality could be threatened by increased greenhouse gas emissions. Therefore, such practices have negative consequences in the context global change. present year-long field experiment, carried out under irrigated semiarid conditions, evaluated effect returning maize crop residues at two topsoil input levels combination with bare fallow, a cereal (barley, Hordeum vulgare L.) legume (vetch, Vicia sativa as crops part an annual crop–cash (maize, Zea mays rotation. In addition, control plots, without addition nitrogen fertilizer (either previous season or during experiment), were established following same experimental design order to assess carry-over impact residual from prior crops. Nitrous oxide (N2O), methane (CH4) carbon dioxide (CO2) fluxes measured together mineral yields use efficiency. significant residue on N2O emissions phase (this was 43% greater lower than higher) offset after subsequent fertilization (there 170% increase higher compared lower). Although no differences content reported between treatments before fertilization, 72% fertilized plots plots. Before incorporation rewetting irrigation, highest being crop. Cumulative CO2 (cereal legume) fallow while CH4 sink not affected input. grain yield penalty production (a 7% decrease) (the opposite what observed area) highlights need accurate estimation supply mineralization residues. Overall, did any cumulative emissions, so positive effects these should considered recommend them conditions mitigation adaptation.

Language: Английский

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The effects of gravity waves on ozone over the Tibetan Plateau

Atmospheric Research, Journal Year: 2023, Volume and Issue: 299, P. 107204 - 107204

Published: Dec. 21, 2023

The ozone valley over the Tibetan Plateau (TP) has an important effect on global weather and climate. As a significant source of atmospheric gravity waves (GWs), TP is also key area stratosphere-troposphere exchange (STE), yet exploration causes low values been scarce from perspective GW. In this paper, we used hyperspectral Atmospheric Infrared Sounder (AIRS) data to extract GWs deep convection analyzed statistical characteristics for corresponding events. results show that: (1) observed by AIRS mainly occur in mid-latitude region, with maximum frequency >10%, their intensity varies longitude. Three large-value regions have identified coast Southeast Asia, Central America, Africa. (2) Most occurs Intertropical Convergence Zone (ITCZ), three large value centers East Asian monsoon America Among them, Indian Northwest Pacific region east Philippines, western side South China Sea (SCS) are areas within occurrence exceeding 15%. (3) convective waves. most southern foothills TP, related 30%–50%. Almost all its adjacent accompanied GWs, 60–90%. (4) composite analysis that or negative anomalies indicating decrease integrated column amount ozone. (5) By analyzing anomaly distribution meteorological elements such as cloud fraction, top height, tropopause outgoing longwave radiation (OLR), dual presence convection. involves not only increased generation clouds, conducive but elevated promoting formation high some even beyond tropopause. addition, GW can affect strengthen activity, facilitate upward transfer low-concentration lower layer upper layer, thereby causing

Language: Английский

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Comparison of the Climatic Characteristics of Ozone Valley Over the Tibetan Plateau and the Rocky Mountains

Earth and Space Science, Journal Year: 2024, Volume and Issue: 11(4)

Published: April 1, 2024

Abstract This study compares the ozone valleys over Tibetan Plateau (TP) and Rocky Mountains (RM) using ERA5 reanalysis data set. The dynamical transport of these two regions is analyzed Lorenz circulation decomposition method. content valley TP observed around 200–50 hPa (upper troposphere lower stratosphere, or UTLS), that RM 300–100 hPa. It shown smaller than RM. By analyzing spatiotemporal distribution general circulation, anticyclone Southern Asian (SAH) plays a significant role in existence valley, flux reaches its maximum July. Large‐scale terrain related determine appearance. Further analysis suggests stationary has larger impact on formation transient transport. by zonal nearly cancels out most meridional due to fact magnitude equal center much weaker TP. Furthermore, contrasts between transports are less evident eddy‐driven significantly impacts development low centers across large terrains.

Language: Английский

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