Anthropogenic Influence on Oxidative Capacity and BVOC Oxidation During GoAmazon 2014

GSTDTAP

项目编号	1628491
	Anthropogenic Influence on Oxidative Capacity and BVOC Oxidation During GoAmazon 2014
	Frank Keutsch
主持机构	Harvard University
项目开始年	2015
	2015-07-01
项目结束日期	2017-11-30
资助机构	US-NSF
项目类别	Standard Grant
项目经费	205116(USD)
国家	美国
语种	英语
英文摘要	This project is focused on improving the mechanistic understanding of processes controlling the oxidative capacity of the atmosphere in the Amazon, a region with high concentrations of biogenic volatile organic compounds (BVOC), and investigating the anthropogenic influences on these processes. These objectives will be pursued through a field study in the central Amazon downwind of the industrial city of Manaus (population 2 million), Brazil, during two intensive operating periods (IOPs) (Feb/Mar and Aug/Oct 2014). The Amazon is a good location for this work since the intense sunlight, high BVOC emissions dominated by isoprene, and sustained high OH concentrations result in rapid photochemical processing and formation of secondary organic aerosol (SOA). In-situ measurements of BVOC oxidation products, such as glyoxal, methylgloxal, and formaldehyde, that have different OH-dependent formation or loss pathways, will be used along oxidation product ratios and modeling efforts to determine the key chemical mechanisms of BVOC oxidation during both the wet and dry seasons. During the wet season, measurements at the site are expected to provide data related to "clean" conditions, while during the dry season the polluted plume from Manaus is expected to impact the site, providing information about the anthropogenic influence (especially that of NOx) on BVOC oxidation. A better understanding of these mechanisms will clarify the extent to which hydroxyl radicals are recycled following reactions with BVOC in tropical forests. This research will to contribute to improved global/regional prediction of greenhouse-gas lifetimes and aerosol effects from precursor emissions on climate, air quality, public health, and the environment. It is an important contribution to the larger GoAmazon-2014 campaign supported by the U.S. Department of Energy and the government of Brazil to look at the coupled atmosphere-cloud-terrestrial tropical systems.
来源学科分类	Geosciences - Atmospheric and Geospace Sciences
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/68161
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Frank Keutsch.Anthropogenic Influence on Oxidative Capacity and BVOC Oxidation During GoAmazon 2014.2015.