| Title | Evidence for lunar tide effects in Earth's plasmasphere |
| Authors | Xiao, Chao He, Fei Shi, Quanqi Liu, Wenlong Tian, Anmin Guo, Ruilong Yue, Chao Zhou, Xuzhi Wei, Yong Rae, I. Jonathan Degeling, Alexander W. Angelopoulos, Vassilis Masongsong, Emmanuel V. Liu, Ji Zong, Qiugang Fu, Suiyan Pu, Zuyin Zhang, Xiaoxin Wang, Tieyan Wang, Huizi Zhang, Zhao |
| Affiliation | Shandong Univ, Inst Space Sci, Sch Space Sci & Phys, Chinese Minist Educ,Key Lab Particle Phys & Partic, Weihai, Peoples R China Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China Beihang Univ, Sch Space & Environm, Beijing, Peoples R China Beihang Univ, Key Lab Space Environm Monitoring & Informat Proc, Beijing, Peoples R China Peking Univ, Inst Space Phys & Appl Technol, Beijing, Peoples R China Northumbria Univ, Dept Maths Phys & Elect Engn, Newcastle, England Univ Calif Los Angeles, Inst Geophys & Space Phys, Dept Earth Planetary & Space Sci, Los Angeles, CA USA Univ Alberta, Dept Phys, Edmonton, AB, Canada China Meteorol Adm, Natl Ctr Space Weather, Key Lab Space Weather, Beijing, Peoples R China Yunnan Univ, Sch Earth Sci, Chenggong Campus, Kunming, Peoples R China |
| Keywords | ELECTRIC-FIELDS ZEBRA STRIPES MODEL OCEAN MAGNETOSPHERE DISSIPATION SATELLITE DISCOVERY MOTION |
| Issue Date | Jan-2023 |
| Publisher | NATURE PHYSICS |
| Abstract | Lunar tides affect Earth's oceans and its geomagnetic field. Multisatellite observations demonstrate that they also impact the plasmasphere. Tides are universal and affect spatially distributed systems, ranging from planetary to galactic scales. In the Earth-Moon system, effects caused by lunar tides were reported in the Earth's crust, oceans, neutral gas-dominated atmosphere (including the ionosphere) and near-ground geomagnetic field. However, whether a lunar tide effect exists in the plasma-dominated regions has not been explored yet. Here we show evidence of a lunar tide-induced signal in the plasmasphere, the inner region of the magnetosphere, which is filled with cold plasma. We obtain these results by analysing variations in the plasmasphere's boundary location over the past four decades from multisatellite observations. The signal possesses distinct diurnal (and monthly) periodicities, which are different from the semidiurnal (and semimonthly) variations dominant in the previously observed lunar tide effects in other regions. These results demonstrate the importance of lunar tidal effects in plasma-dominated regions, influencing understanding of the coupling between the Moon, atmosphere and magnetosphere system through gravity and electromagnetic forces. Furthermore, these findings may have implications for tidal interactions in other two-body celestial systems. |
| URI | http://hdl.handle.net/20.500.11897/670967 |
| ISSN | 1745-2473 |
| DOI | 10.1038/s41567-022-01882-8 |
| Indexed | SCI(E) |
| Appears in Collections: | 地球与空间科学学院 |
