Concluding remarks: Faraday Discussion on air quality in megacities
Concluding remarks: Faraday Discussion on air quality in megacities
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DOI：
10.1039/d0fd90037k
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发表时间：
2021-03-01
影响因子：
3.4
通讯作者：
Chan, Chak K.
中科院分区：
文献类型：
--
作者：
Gen, Masao;Zhou, Liyuan;Chan, Chak K.
特大城市是指人口超过1000万的大都市地区，其中许多城市面临着空气污染等重大的全球环境挑战。特大城市中激烈的经济和人类活动导致空气污染排放，在大气中产生高水平的空气污染物，危害人类健康，造成区域性雾霾和酸沉积，损害作物，影响区域空气质量，并助长气候变化。自70年前伦敦雾霾和第一次公认的洛杉矶光化学雾霾以来，在提高对空气污染的科学认识、开发减排技术和控制措施方面取得了实质性进展。然而，关于大气输送的复杂过程和反应机制，仍有许多有待了解；次生粒子的形成和演化，尤指含有有机物的粒子；新出现的排放源和气候变化对空气质量和健康的影响。Molina （DOI: 10.1039/D0FD00123F）为本次法拉第讨论的介绍性讲座提供了超大城市排放源，大气物理化学过程，空气质量趋势和管理以及对健康和气候的影响的出色概述。
Megacities are metropolitan areas with populations over 10 million, and many of them are facing significant global environmental challenges such as air pollution. Intense economic and human activities in megacities result in air pollution emissions, inducing high levels of air pollutants in the atmosphere that harm human health, cause regional haze and acid deposition, damage crops, influence regional air quality, and contribute to climate change. Since the Great London Smog and the first recognized episode of Los Angeles photochemical smog seventy years ago, substantial progress has been achieved in improving the scientific understanding of air pollution and in developing emissions reduction technologies and control measures. However, much remains to be understood about the complex processes of atmospheric transport and reaction mechanisms; the formation and evolution of secondary particles, especially those containing organic species; and the influence of emerging emissions sources and changing climate on air quality and health. Molina (DOI: 10.1039/D0FD00123F) has provided an excellent overview of the sources of emissions in megacities, atmospheric physicochemical processes, air quality trends and management, and the impacts on health and climate for the introductory lecture of this Faraday Discussion.