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DOI | 10.1029/2018GL077381 |
Topside Ionospheric Electron Temperature Observations of the 21 August 2017 Eclipse by DMSP Spacecraft | |
Hairston, Marc R.1; Mrak, Sebastijan2,3; Coley, W. R.1; Burrell, Angeline1; Holt, Ben1; Perdue, Michael1; Depew, Matthew1; Power, Robert1 | |
2018-08-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:15页码:7242-7247 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | During the 21 August 2017 eclipse two separate DMSP spacecraft passed through the lunar penumbra at local afternoon (F16) and near local sunset (F17) in the topside ionosphere at an altitude of similar to 850 km. Measurements of the in situ electron temperature by the Langmuir probe on each spacecraft showed regions where the temperature decreased on the order of 500 to 1,000K in the shadow. The patterns of these decreases were sporadic inside the shadow but generally showed the same overall shape in both passes. Comparing these patterns of temperature reductions with the projection of the gradient of the solar EUV radiation in the ionosphere suggests that these complex patterns are a result of the nonuniform distribution of the solar EUV radiation on the Sun at the time of the eclipse. Plain Language Summary As the shadow of the Moon moves across the Earth's upper atmosphere, the decrease in ultraviolet light from the Sun causes a cooling of the electrons in the ionosphere. Measurements during the 21 August 2017 eclipse from the DMSP spacecraft showed a complex and puzzling pattern of this temperature drop. The uneven distribution of the ultraviolet light sources from active regions on the Sun's surface is suggested as a possible explanation. |
英文关键词 | eclipse DMSP electron temperature solar EUV gradient topside ionosphere |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000443129500001 |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27932 |
专题 | 气候变化 |
作者单位 | 1.Univ Texas Dallas, Ctr Space Sci, Richardson, TX 75083 USA; 2.Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA; 3.Boston Univ, Ctr Space Phys, Boston, MA 02215 USA |
推荐引用方式 GB/T 7714 | Hairston, Marc R.,Mrak, Sebastijan,Coley, W. R.,et al. Topside Ionospheric Electron Temperature Observations of the 21 August 2017 Eclipse by DMSP Spacecraft[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(15):7242-7247. |
APA | Hairston, Marc R..,Mrak, Sebastijan.,Coley, W. R..,Burrell, Angeline.,Holt, Ben.,...&Power, Robert.(2018).Topside Ionospheric Electron Temperature Observations of the 21 August 2017 Eclipse by DMSP Spacecraft.GEOPHYSICAL RESEARCH LETTERS,45(15),7242-7247. |
MLA | Hairston, Marc R.,et al."Topside Ionospheric Electron Temperature Observations of the 21 August 2017 Eclipse by DMSP Spacecraft".GEOPHYSICAL RESEARCH LETTERS 45.15(2018):7242-7247. |
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