2篇
您的检索式：作者名="A.R.Ravishankara"
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| 1 | An unexpected large continental source of reactive bromine and chlorine with significant impact on wintertime air quality显示文摘Halogen atoms affect the budget of ozone and the fate of pollutants such as hydrocarbons and mercury.Yet their sources and significances in polluted continental regions are poorly understood.Here we report the observation of unprecedented levels(averaging at 60 parts per trillion)of bromine chloride(BrCl)at a mid-latitude site in North China during winter.Widespread coal burning in rural households and a photo-assisted process were the primary source of BrCl and other bromine gases.BrCl contributed about 55%of both bromine and chlorine atoms.The halogen atoms increased the abundance of'conventional'tropospheric oxidants(OH,HO_(2) and RO_(2))by 26%-73%,and enhanced oxidation of hydrocarbon by nearly a factor of two and the net ozone production by 55%.Our study reveals the significant role of reactive halogen in winter atmospheric chemistry and the deterioration of air quality in continental regions where uncontrolled coal combustion is prevalent. | Xiang Peng Weihao Wang Men Xia Hui Chen A.R.Ravishankara Qinyi Li Alfonso Saiz-Lopez Pengfei Liu Fei Zhang Chenglong Zhang Likun Xue Xinfeng Wang Christian George Jinhe Wang Yujing Mu Jianmin Chen Tao Wang | 2021 | National Science Review2021，8，7： | 2 |
| 2 | A question of balance: weighing the options for controlling ammonia,sulfur dioxide and nitrogen oxides显示文摘Acid precipitation,climate change and deteriorating air quality are some of the major environmental concerns of today,all caused by anthropogenic emissions of sulfur dioxide(SO2),carbon dioxide(CO2),hydrocarbons,nitrous oxide(N2O),nitrogen oxides(NOx),mercury and others.Societies have designed coping strategies by reducing specific emissions,depending on the environmental concerns of the times. | A.R.Ravishankara | 2019 | National Science Review2019，6，5： | 0 |
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