| 项目编号: | 1561755
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| 项目名称: | Leaf-level to Canopy NOx and Ozone Exchanges at University of Michigan Biological Station (UMBS) during PHotochemistry, Emissions, and Transport (PROPHET) 2016 |
| 作者: | Detlev Helmig
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| 承担单位: | University of Colorado at Boulder
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| 批准年: | 2016
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| 开始日期: | 2016-05-01
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| 结束日期: | 2018-04-30
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| 资助金额: | 370630
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Atmospheric and Geospace Sciences
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| 英文关键词: | leaf-level
; ozone
; emission
; leaf-level gas exchange
; atmosphere
; multi-layer canopy chemical exchange
; leaf-level nox exchange
; leaf exchange
; daytime below-canopy turbulent transport representation
; ambient nox
; michigan biological station
; umbs forest oxidation
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| 英文摘要: | This project is part of a summer field study to gain a better understanding of reactive chemistry in the atmosphere of a forested environment. In this project, the exchange of nitrogen compounds at the leaf-level will be investigated to better predict the production of ozone, secondary organic aerosols and the cycling of nitrogen between the atmosphere and the biosphere. Improving the understanding of reactive chemistry in forest environments will improve projections of how future changes in forest succession and climate might affect the future composition of the atmosphere.
The specific objectives of this study are to: (1) determine leaf exchanges of NO, NO2, NOy, and ozone for the dominant tree species at the University of Michigan Biological Station's (UMBS) Program for Research on Oxidants: PHotochemistry, Emissions, and Transport (PROPHET) site; (2) determine the dependency of the leaf-level gas exchanges on the physiological and environmental factors including photosynthesis, stomatal conductance, light, temperature, and humidity; (3) determine the dependency of the leaf-level gas exchanges on the ambient NOx and ozone mixing ratio; (4) Investigate potential connections between leaf-level NOx exchanges and emission of biogenic volatile organic carbon; (5) re-examine nocturnal and daytime below-canopy turbulent transport representation in the Multi-layer Canopy Chemical Exchange (MLC-CHEM) model using high resolution temperature gradient measurements; and (6) incorporate, revisit, and further improve the modeling of the UMBS forest oxidation. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/92467
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Detlev Helmig. Leaf-level to Canopy NOx and Ozone Exchanges at University of Michigan Biological Station (UMBS) during PHotochemistry, Emissions, and Transport (PROPHET) 2016. 2016-01-01.
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