| DOI: | 10.2172/1038676
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| 报告号: | DOE/SC0006325-1
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| 报告题名: | Cirrus Microphysical Properties from Stellar Aureole Measurements, Phase I |
| 作者: | DeVore, J. G.; Kristl, J. A.; Rappaport, S. A.
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| 出版年: | 2012
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| 发表日期: | 2012-04-20
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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: | Aerosols
; Cirrus Ice Crystal Size Distributions
; Climate Change
; Stellar Aureole Measurement
; Solar Aureole Measurement
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| 中文主题词: | 大气科学
; 气溶胶
; 云
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| 主题词: | ATMOSPHERE
; AEROSOLS
; CLOUDS
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| 英文摘要: | While knowledge of the impact of aerosols on climate change has improved significantly due to the routine, ground-based, sun photometer measurements of aerosols made at AERONET sites world-wide, the impact of cirrus clouds remains much less certain because they occur high in the atmosphere and are more difficult to measure. This report documents work performed on a Phase I SBIR project to retrieve microphysical properties of cirrus ice crystals from stellar aureole imagery. The Phase I work demonstrates that (1) we have clearly measured stellar aureole profiles; (2) we can follow the aureole profiles out to ~1/4 degree from stars (~1/2 degree from Jupiter); (3) the stellar aureoles from cirrus have very distinctive profiles, being flat out to a critical angle, followed by a steep power-law decline with a slope of ~-3; (4) the profiles are well modeled using exponential size distributions; and (5) the critical angle in the profiles is ~0.12 degrees, (6) indicating that the corresponding critical size ranges from ~150 to ~200 microns. The stage has been set for a Phase II project (1) to proceed to validating the use of stellar aureole measurements for retrieving cirrus particle size distributions using comparisons with optical property retrievals from other, ground-based instruments and (2) to develop an instrument for the routine, automatic measurement of thin cirrus microphysical properties. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1038676
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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/40683
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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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| 1038676.pdf（10778KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
DeVore, J. G.,Kristl, J. A.,Rappaport, S. A.. Cirrus Microphysical Properties from Stellar Aureole Measurements, Phase I. 2012-01-01.
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