Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.2172/1038676 |
报告编号 | DOE/SC0006325-1 |
来源ID | OSTI ID: 1038676 |
Cirrus Microphysical Properties from Stellar Aureole Measurements, Phase I | |
DeVore, J. G.; Kristl, J. A.; Rappaport, S. A. | |
2012-04-20 | |
出版年 | 2012 |
语种 | 英语 |
国家 | 美国 |
领域 | 地球科学 |
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. |
英文关键词 | Aerosols Cirrus Ice Crystal Size Distributions Climate Change Stellar Aureole Measurement Solar Aureole Measurement |
URL | 查看原文 |
来源平台 | US Department of Energy (DOE) |
引用统计 | |
文献类型 | 科技报告 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/5588 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | DeVore, J. G.,Kristl, J. A.,Rappaport, S. A.. Cirrus Microphysical Properties from Stellar Aureole Measurements, Phase I,2012. |
条目包含的文件 | 条目无相关文件。 |
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