| DOI: | 10.2172/1253999
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| 报告号: | DOE/SC--ARM-15-033
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| 报告题名: | Harvard Bounce Apparatus GoAmazon 2014/15 Field Campaign Report |
| 作者: | Bateman, Adam; Martin, Scott T.
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| 出版年: | 2016
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| 发表日期: | 2016-05-01
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| 总页数: | 14
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| 国家: | 美国
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| 语种: | 英语
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| 英文关键词: | Hydrophobic particulates
; cloud condensation nuclei
; particle phase transition
; transport of pollutants
; isoprenes
; Manacapuru
; particle rebound
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| 中文主题词: | 云凝结核
; 颗粒物质
; 颗粒物
; 冷凝
; 潮湿
; 生物量
; 生物质燃烧
; 凝结
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| 主题词: | CLOUD CONDENSATION NUCLEI
; PARTICULATE MATTER
; PARTICULATES
; CONDENSATION
; HUMIDITY
; BIOMASS
; BIOMASS BURNING
|
| 英文摘要: | The effect of relative humidity (RH) on the physical state of particulate matter during the GoAmazon 2014/15 campaign was investigated through the use of particle rebound (or lack thereof) during impaction. The physics governing particle rebound have been previously modeled and can be attributed to the surface and material properties. The physical state of secondary organic material is regulated by several factors, including the local RH, the recent RH history in the case of hysteresis, and chemical composition. Across the range of atmospheric RH, hygroscopic water uptake can occur and transitions from higher to lower viscosity phases are possible. By varying the particulate matter water content and observing particle rebound as a function of RH, the phase state of the organic material under investigation can be determined. Custom-made impactors were employed to study the effects of RH (up to 95%) on the particle physical state. Results inferred from the particle rebound measurements indicate that, under ambient conditions (RH >80%), particulate matter in Amazonia can be considered in a liquid phase state. However, during certain time periods, a fraction (10 to 30%) of particulate matter is found to rebound during the highest RH conditions, which indicates the presence of hydrophobic particles. The source of the hydrophobic particulates appears to be anthropogenic, from either biomass burning or the Manaus plume. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1253999
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/42130
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 1253999.pdf（2000KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Bateman, Adam,Martin, Scott T.. Harvard Bounce Apparatus GoAmazon 2014/15 Field Campaign Report. 2016-01-01.
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