| 项目编号: | 1702106
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| 项目名称: | Collaborative Research: P2C2--Drivers for Past Variability in Tropospheric Reactive Halogens: Implications for Climate and Evaluation of Ice Core Proxies |
| 作者: | Lee Murray
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| 承担单位: | University of Rochester
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| 批准年: | 2017
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| 开始日期: | 2017-09-01
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| 结束日期: | 2020-08-31
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| 资助金额: | 201549
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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: | reactive halogen
; climate
; researcher
; global climate system model
; ice-core observation
; short-lived climate
; research result
; several paleoclimate proxy
; research question
; potential implication
; ice core
; climate-induced change
; climate change
; tropospheric o3
|
| 英文摘要: | This project aims to examine reactive halogens and their impacts on the chemistry of the troposphere and stratosphere especially with regards to climate. Reactive halogens impact the oxidative capacity of the atmosphere thereby influencing reduced concentrations of trace gases such as methane CH4 and the abundance of short lived climate forcing agents such as ozone (O3) and aerosols in the atmosphere.
Ice-core observations of the precursors and/or sinks of reactive halogens in the troposphere suggest both anthropogenic- and climate-induced changes in the abundance of reactive halogens in the troposphere. This has an, as of yet, unquantified impact on several paleoclimate proxies in ice cores.
The researchers plan to investigate the sensitivity of reactive halogen abundance to anthropogenic emissions and to climate change in a global model and examine its potential feedbacks on climate. As such, the project will focus on the following two research questions: (1) What are the biggest drivers for changes in the abundance of reactive halogens over the preindustrial-industrial and glacial-interglacial timescales; and (2) What are the potential implications for the oxidizing capacity of the atmosphere and short-lived climate forcing agents CH4, tropospheric O3, and aerosols.
The potential broader impacts include the potential to advance knowledge and understanding within atmospheric chemistry and climate and paleoclimatology, via potential improvement of the representation of reactive chemistry in global climate system models with interactive carbon simulation. The project supports the training graduate students in numerical modeling of atmospheric chemistry, outreach and education. It also provides for the wider community dissemination of research results of GEOS-CHEM model development through workshops and meeting sessions and public and K12 outreach and education efforts by the researchers. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/88973
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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: | |
Lee Murray. Collaborative Research: P2C2--Drivers for Past Variability in Tropospheric Reactive Halogens: Implications for Climate and Evaluation of Ice Core Proxies. 2017-01-01.
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