Collaborative Research: Forest-Atmosphere Volatile Organic Compound (VOC) Exchange for a Coniferous Ecosystem - Closing the Flux Budget

GSTDTAP

项目编号	1932849
	Collaborative Research: Forest-Atmosphere Volatile Organic Compound (VOC) Exchange for a Coniferous Ecosystem - Closing the Flux Budget
	Delphine Farmer (Principal Investigator)
主持机构	Colorado State University
项目开始年	2019
	2019-11-01
项目结束日期	2022-10-31
资助机构	US-NSF
项目类别	Continuing grant
项目经费	160987(USD)
国家	美国
语种	英语
英文摘要	This project is focused on the two-way exchange of biogenic volatile organic compounds (BVOCs) between coniferous forests and the atmosphere. Recent observations include ecosystem-atmosphere fluxes for many hundreds of organic species, vastly more than are included in current chemical transport models. The impacts of these "missing" organic species is unknown, resulting in models that are fundamentally limited in their ability to simulate forest-atmosphere volatile organic carbon exchange. This research will better define the ecosystem-atmosphere fluxes that take place in coniferous forests, enabling models to better predict the carbon exchange that is taking place. Carbon is an essential element for all life, so understanding how it moves helps us to understand biological processes and factors that influence them. This research will address the following scientific questions: (1) What is the reactive carbon flux budget across the mass spectrum for a coniferous forest? What is the importance of these two-way fluxes for atmospheric OH reactivity? Is there a significant role for previously unidentified or unmodeled compounds? (2) How do the emissions and deposition of individual organic molecules, classes of BVOCs (by O:C ratio, OH rate constant, degree of unsaturation, etc.), and the overall reactive ensemble, vary temporally and as a function of environmental drivers? To what extent do current models capture these dependencies? (3) How do individual ecosystem components (e.g., overstory, understory, soils), in-canopy chemistry, and deposition combine to drive the overall net forest-atmosphere flux budget? Can we close the ecosystem-level BVOC flux budget by reconciling these different terms? And (4) What are the broader implications of this full suite of BVOC fluxes for atmospheric composition, near-surface ozone, and HOx chemistry? The research plan combines two high-resolution TOF-CIMS to measure canopy-level BVOC fluxes across the entire mass range over a coniferous forest to assess the importance of those fluxes for OH reactivity. This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/214211
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Delphine Farmer .Collaborative Research: Forest-Atmosphere Volatile Organic Compound (VOC) Exchange for a Coniferous Ecosystem - Closing the Flux Budget.2019.