| Measurements of the Vorticity in the Bursty Bulk Flows | |
| Zhang, L.Q.1; Baumjohann, W.2; Dai, L.1; Khotyaintsev, Yu V.3; Wang, C.1 | |
| Department | 空间科学部 |
| Source Publication | GEOPHYSICAL RESEARCH LETTERS
 |
| 2019 | |
| Volume | 46Issue:17-18Pages:10322-10329 |
| DOI | 10.1029/2019GL084597 |
| ISSN | 0094-8276 |
| Language | 英语 |
| Keyword | vorticity flow eddy bursty bulk flows Curlometer analysis kinetic Alfvenic wave |
| Abstract | Curlometer analysis from 4-point Magnetospheric Multiscale spacecraft measurements is applied to obtain the vorticity (omega) in the bursty bulk flow (BBF) from tail reconnection. Increases of the vorticity is associated with enhancements of the high-energy ion flux (above 10 keV) and the flow speed during the BBF. Finger-like structure, consisting of the lower-energy ions below 10 keV, occurs mainly during intervals of small vorticity. The vorticity during BBF consistently shows a dominant -Z Geocentric solar magnetospheric (GSM) component, indicating clockwise vortexes in the flows. Combined with bipolar signals of Vy-geocentric solar magnetic, the Magnetospheric Multiscale observations provide evidence for flow eddies in the BBF. Power spectral analysis suggests existence of kinetic Alfvenic wave emissions, in addition to the flow eddy, in the high-frequency regime in the BBF turbulence. |
| Indexed By | SCI ; EI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.nssc.ac.cn/handle/122/7183 |
| Collection | 空间科学部 |
| Affiliation | 1.State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing, China; 2.Space Research Institute, Austrian Academy of Sciences, Graz, Austria; 3.Swedish Institute of Space Physics, Uppsala, Sweden |
| Recommended Citation GB/T 7714 | Zhang, L.Q.,Baumjohann, W.,Dai, L.,et al. Measurements of the Vorticity in the Bursty Bulk Flows[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(17-18):10322-10329. |
| APA | Zhang, L.Q.,Baumjohann, W.,Dai, L.,Khotyaintsev, Yu V.,&Wang, C..(2019).Measurements of the Vorticity in the Bursty Bulk Flows.GEOPHYSICAL RESEARCH LETTERS,46(17-18),10322-10329. |
| MLA | Zhang, L.Q.,et al."Measurements of the Vorticity in the Bursty Bulk Flows".GEOPHYSICAL RESEARCH LETTERS 46.17-18(2019):10322-10329. |
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| 2019GL084597.pdf（2212KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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