Opposite OH reactivity and ozone cycles in the Amazon rainforest and   megacity Beijing: Subversion of biospheric oxidant control by   anthropogenic emissions

doi:10.1016/j.atmosenv.2015.11.007

CORC > 北京大学 > 环境科学与工程学院

	Opposite OH reactivity and ozone cycles in the Amazon rainforest and megacity Beijing: Subversion of biospheric oxidant control by anthropogenic emissions
	Williams, Jonathan ; Kessel, Stephan U. ; Noelscher, Anke C. ; Yang, Yudong ; Lee, Yue ; Yanez-Serrano, Ana Maria ; Wolff, Stefan ; Kesselmeier, Juergen ; Kluepfel, Thomas ; Lelieveld, Jos ; Shao, Min
刊名	ATMOSPHERIC ENVIRONMENT
	2016
关键词	OH-reactivity Ozone Rainforest Megacity Amazon Beijing VOLATILE ORGANIC-COMPOUNDS ATMOSPHERIC OXIDATION VOC REACTIVITY BOREAL FOREST URBAN CHEMISTRY NOX AIR HOX INSIGHTS
DOI	10.1016/j.atmosenv.2015.11.007
英文摘要	The Amazon rainforest in Brazil and the megacity of Beijing in China are two of the most strongly contrasting habitats on Earth. In both locations, volatile chemicals are emitted into the atmosphere affecting the local atmospheric chemistry, air quality and ecosystem health. In this study, the total reactivity in air available for reaction with the atmosphere's primary oxidant the OH radical, has been measured directly in both locations along with individual volatile organic compounds(VOC), nitrogen oxides(NOx), ozone(O-3) and carbon dioxide(CO2). Peak daily OH-reactivity in the Amazon 72 s(-1), (min. 27 s(-1)) was approximately three times higher than Beijing 26 s(-1) (min. 15 s(-1)). However, diel ozone variation in Amazonia was small (similar to 5 ppb) whereas in Beijing similar to 70 ppb harmful photochemical ozone was produced by early afternoon. Amazon OH-reactivity peaked by day, was strongly impacted by isoprene, and anticorrelated to CO2, whereas in Beijing OH-reactivity was higher at night rising to a rush hour peak, was dominated by NO2 and correlated with CO2. These converse diel cycles between urban and natural ecosystems demonstrate how biosphere control of the atmospheric environment is subverted by anthropogenic emissions. (c) 2015 The Authors. Published by Elsevier Ltd.; German Federal Ministry of Education and Research (BMBF) [01LB1001A]; Brazilian Ministerio da Ciencia, Tecnologia e Inovacao (MCTI/FINEP) [01.11.01248.00]; Natural Science Foundation [41125018]; Peking University; SCI(E); EI; ARTICLE; jonathan.Williams@mpic.de; 112-118; 125
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/422657]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Williams, Jonathan,Kessel, Stephan U.,Noelscher, Anke C.,et al. Opposite OH reactivity and ozone cycles in the Amazon rainforest and megacity Beijing: Subversion of biospheric oxidant control by anthropogenic emissions[J]. ATMOSPHERIC ENVIRONMENT,2016.
APA	Williams, Jonathan.,Kessel, Stephan U..,Noelscher, Anke C..,Yang, Yudong.,Lee, Yue.,...&Shao, Min.(2016).Opposite OH reactivity and ozone cycles in the Amazon rainforest and megacity Beijing: Subversion of biospheric oxidant control by anthropogenic emissions.ATMOSPHERIC ENVIRONMENT.
MLA	Williams, Jonathan,et al."Opposite OH reactivity and ozone cycles in the Amazon rainforest and megacity Beijing: Subversion of biospheric oxidant control by anthropogenic emissions".ATMOSPHERIC ENVIRONMENT (2016).