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DOI | 10.1029/2018GL079383 |
Ionospheric Density Irregularities, Turbulence, and Wave Disturbances During the Total Solar Eclipse Over North America on 21 August 2017 | |
Pradipta, Rezy; Yizengaw, Endawoke; Doherty, Patricia | |
2018-08-28 | |
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:16页码:7909-7917 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Data from ionosonde and global positioning system (GPS) total electron content (TEC) observations reveal a number of ionospheric phenomena during the total solar eclipse on 21 August 2017 over North America. The eclipse started over the West Coast at similar to 16:00 UTC (similar to 07:53 LT) and ended over the East Coast at similar to 20:00 UTC (similar to 14:46 LT). We identify a growth of plasma density irregularities and turbulence on the bottomside ionosphere during the eclipse totality (at similar to 10:03 LT over Idaho Falls), signified by the distinct appearance of spread-F echoes in the ionosonde data. In addition, data from the ionosonde observations also show some characteristic signatures of traveling ionospheric disturbances at similar to 300-km altitude during the eclipse. Finally, large reductions in TEC and ionospheric plasma densities (by 33-45%) due to the eclipse were observed in both the GPS TEC and ionosonde data. Plain Language Summary We studied the effects of the 21 August 2017 total solar eclipse on the ionosphere over North America using ionosonde and GPS observations. The ionosphere experienced some degree of plasma density and total electron content reductions during the eclipse, and some of these reductions happened with certain time delay relative to the moment of maximum eclipse. Furthermore, the ionosonde observations indicate that ionospheric plasma over Idaho became turbulent around the moment of eclipse totality and some wave disturbances were also seen in the data shortly after the totality. This type of ionospheric turbulence, referred to in the ionospheric science community by the name spread-F, is more commonly observed during the evening hours. Spread-F is typically much stronger in intensity over the equatorial regions, when compared to spread-F cases over midlatitude regions. The experimental data thus suggest that the solar eclipse can create a favorable condition for spread-F turbulence to appear over a midlatitude location. |
英文关键词 | ionosphere solar eclipse TID GPS TEC midlatitude spread-F |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445612500003 |
WOS关键词 | MIDLATITUDE SPREAD F ; SCATTER RADAR OBSERVATIONS ; EQUATORIAL IONOSPHERE ; ELECTRIC-FIELDS ; LOW-LATITUDE ; ELECTRODYNAMICS ; INSTABILITY ; REGION ; IONOSONDE ; ARECIBO |
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/26435 |
专题 | 气候变化 |
作者单位 | Boston Coll, Inst Sci Res, Chestnut Hill, MA 02167 USA |
推荐引用方式 GB/T 7714 | Pradipta, Rezy,Yizengaw, Endawoke,Doherty, Patricia. Ionospheric Density Irregularities, Turbulence, and Wave Disturbances During the Total Solar Eclipse Over North America on 21 August 2017[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(16):7909-7917. |
APA | Pradipta, Rezy,Yizengaw, Endawoke,&Doherty, Patricia.(2018).Ionospheric Density Irregularities, Turbulence, and Wave Disturbances During the Total Solar Eclipse Over North America on 21 August 2017.GEOPHYSICAL RESEARCH LETTERS,45(16),7909-7917. |
MLA | Pradipta, Rezy,et al."Ionospheric Density Irregularities, Turbulence, and Wave Disturbances During the Total Solar Eclipse Over North America on 21 August 2017".GEOPHYSICAL RESEARCH LETTERS 45.16(2018):7909-7917. |
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