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| DOI | 10.1088/1748-9326/ab4222 |
| The impact of climate mitigation measures on near term climate forcers | |
| Turnock S.T.; Smith S.; O'Connor F.M. | |
| 发表日期 | 2019 |
| ISSN | 17489318 |
| 卷号 | 14期号:10 |
| 英文摘要 | Here we quantify the regional co-benefits to future air quality on annual to daily mean timescales from implementing mitigation measures to stabilise future climate. Two consistent future emissions pathways are used within the composition-climate model HadGEM3-UKCA: one is a reference pathway of future economic growth and development (REF), whilst the Representative Concentration Pathway 4.5 (RCP4.5) assumes the same development pathway but stabilises anthropogenic radiative forcing at 4.5 W m-2 in 2100. Implementing greenhouse gas (GHG) mitigation measures in RCP4.5 reduces global mean air pollutant emissions by up to 30% in the 2050s, in addition to mitigating climate. Annual mean surface concentrations of ozone and PM2.5 decrease by 10%-20% from the combined reductions in emissions and climate change. The number of days exceeding the World Health Organization's (WHO) daily mean air quality standards are reduced by up 47 days for ozone and 15 days for PM2.5 over different world regions. The air quality co-benefits from mitigation measures are mainly achieved from reductions in anthropogenic emissions, although benefits can be offset due to changes in climate. In terms of anthropogenic climate forcing, while the reduction in global mean effective radiative forcing (ERF) in 2050, relative to the 2000s, due to enacting carbon dioxide mitigation measures (-0.43 W m-2) is enhanced by decreases in tropospheric ozone (-0.26 W m-2) and methane (-0.2 W m-2), it is partially offset by a positive aerosol ERF from reductions in aerosols (+0.35 W m-2). This study demonstrates that policies to mitigate climate change have added co-benefits for global and regional air quality on annual to daily timescales. Furthermore, the effectiveness of the GHG policies in reducing anthropogenic climate forcing is enhanced in the near-term by reductions in ozone and methane despite the increased forcing due to reductions in aerosols. © 2019 Crown copyright. Reproduced with the permission of the Controller of Her Majesty's Stationery Office. |
| 英文关键词 | aerosols; air pollutants; air quality; climate; co-benefits; mitigation |
| 语种 | 英语 |
| scopus关键词 | Aerosols; Air quality; Air quality standards; Atmospheric radiation; Carbon dioxide; Climate models; Economics; Gas emissions; Greenhouse gases; Methane; Ozone; Air pollutant emission; Anthropogenic climate; Anthropogenic emissions; Carbon dioxide mitigation; Greenhouse gas (GHG); Regional air quality; Surface concentration; World Health Organization; Climate change; air quality; carbon dioxide; climate change; climate effect; climate forcing; climate modeling; economic growth; emission control; future prospect; mitigation; radiative forcing; timescale |
| 来源期刊 | Environmental Research Letters
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/154355 |
| 作者单位 | Met Office Hadley Centre, Fitzroy Road, Exeter, Devon, United Kingdom; Joint Global Change Research Institute, Pacific Northwest National Laboratory, College Park, MD 20740, United States |
| 推荐引用方式 GB/T 7714 | Turnock S.T.,Smith S.,O'Connor F.M.. The impact of climate mitigation measures on near term climate forcers[J],2019,14(10). |
| APA | Turnock S.T.,Smith S.,&O'Connor F.M..(2019).The impact of climate mitigation measures on near term climate forcers.Environmental Research Letters,14(10). |
| MLA | Turnock S.T.,et al."The impact of climate mitigation measures on near term climate forcers".Environmental Research Letters 14.10(2019). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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