Climate effects of future aerosol reductions for achieving carbon neutrality in China

Yang, Yang; Zeng, Liangying; Wang, Hailong; Wang, Pinya; Liao, Hong

doi:10.1016/j.scib.2023.03.048

Cited by 10 publications

(4 citation statements)

References 12 publications

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“…(i) In our simulations under carbon neutrality scenario, we use only changing anthropogenic emissions but with meteorology fixed in 2017. A recent study showed that deep emission reductions associated with the target of carbon neutrality increased surface temperature by 0.2 K in eastern China (Yang et al 2023). Therefore, our simulations may underestimate surface O 3 concentrations under carbon neutrality scenario, because high air temperature can increase natural emissions (e.g.…”

Section: Conclusion and Discussionmentioning

confidence: 89%

Impacts of terrestrial vegetation on surface ozone in China: from present to carbon neutrality

Lei,

Yue,

Wang

et al. 2024

Environ. Res. Lett.

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Despite many efforts to control anthropogenic sources, high ambient ozone (O3) concentrations remain a serious air pollution problem in China. Terrestrial vegetation can remove surface O3 through dry deposition but also enhance surface O3 through biogenic volatile organic compound (BVOC) emissions. However, the net impacts of terrestrial vegetation on surface O3 remains unclear. Here, we perform simulations using a chemistry-vegetation coupled model to assess the impacts of terrestrial vegetation on surface daily maximum 8 h average (MDA8) O3 in China through biogeochemical processes, including BVOC emissions and stomatal uptake. The results show that vegetation biogeochemical processes increase summer mean surface MDA8 O3 by 1.3 ppb in the present day in China, with 3.7 ppb from BVOC emissions but -2.7 ppb from stomatal uptake. However, the enhanced summer mean surface MDA8 O3 from vegetation biogeochemical processes decreases from 5.4 to 2.7 ppb in the North China Plain (NCP), from 7.2 to 0.8 ppb in the Yangtze River Delta (YRD), from 8.7 to 1.8 ppb in the Sichuan Basin (SCB) and from 4.2 to 0.4 ppb in the Pearl River Delta (PRD) by the period of carbon neutrality. Our study highlights that carbon neutrality-driven emission reductions can greatly mitigate the enhanced surface O3 related to terrestrial vegetation, though there is still a positive impact of terrestrial vegetation on surface O3 in some hotspots, including the NCP and the SCB.

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Section: Conclusion and Discussionmentioning

confidence: 89%

Impacts of terrestrial vegetation on surface ozone in China: from present to carbon neutrality

Lei,

Yue,

Wang

et al. 2024

Environ. Res. Lett.

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“…In particular, sustained rigorous reduction of AA emissions could be beneficial in alleviating the severe warming of the Southern Ocean. Nevertheless, recent research suggests that by following the carbon neutrality pathway, the impacts of AA reduction on climate and extreme weather events could far outweigh those of GHGs (Wang et al, 2023;Yang et al, 2023). Despite these complexities, several countries are actively developing synergistic pathways toward carbon neutrality and clean air (Lei et al, 2024).…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Future Slower Reduction of Anthropogenic Aerosols Enhances Extratropical Ocean Surface Warming Trends

Gu,

Gan,

Cai

et al. 2024

Geophysical Research Letters

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Global surface temperature short‐term trends fluctuate between cooling and fast‐warming under the combined action of external forcing and internal variability, significantly influencing the detectability of near‐term climate change. A key driver of these variations is anthropogenic aerosols (AAs), which have undergone a non‐monotonic evolution with rapid reduction in recent decades. However, their reduction is projected to decelerate under a high carbon emission scenario, yet the impact on surface temperature trends remains unknown. Here, using initial‐perturbation large ensembles, we find that future slowdown in AA reduction over Europe and North America expedites the subpolar North Atlantic surface warming by intensifying the Atlantic meridional overturning circulation. Further, it accelerates the South Indian Ocean and Southern Ocean surface warming through positive low‐cloud feedback and oceanic dynamical adjustment, triggered by the poleward migration of westerlies under interhemispheric energy constraint. These AA‐driven warmings exacerbate greenhouse warming, significantly enhancing the detectability of local decadal warming trends.

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“…China has embraced green, low-carbon strategies in its economic and social development agenda, striving towards the harmonious coexistence of humans and nature. With China’s pursuit of carbon neutrality, aerosol reductions stemming from clean air actions and pollution control policies could potentially have a substantial impact on the climate ( 14 - 18 ).…”

Section: China Is Tackling Environmental Health Challenges Seriouslymentioning

confidence: 99%

“…In October 2021, the Chinese Government published a white paper, "Responding to Climate Change: China's Policies and Actions." Recognized as the world's largest developing country and a significant contributor to carbon emissions, China announced ambitious goals of reaching peak carbon emissions before 2030 and carbon neutrality prior to 2060 (13). The government has prioritized climate change response and has consistently lowered the intensity of its carbon emissions.…”

Section: China Is Tackling Environmental Health Challenges Seriouslymentioning

confidence: 99%

Addressing Environmental Health Challenges for Sustainable Development in China

Tong¹,

Lyu²,

Wang³

et al. 2023

China CDC Weekly

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Climate effects of future aerosol reductions for achieving carbon neutrality in China

Cited by 10 publications

References 12 publications

Impacts of terrestrial vegetation on surface ozone in China: from present to carbon neutrality

Impacts of terrestrial vegetation on surface ozone in China: from present to carbon neutrality

Future Slower Reduction of Anthropogenic Aerosols Enhances Extratropical Ocean Surface Warming Trends

Addressing Environmental Health Challenges for Sustainable Development in China

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