Global Structure and Seasonal Variations of the Tidal Amplitude in Sporadic-E Layer

Qiong Tang, Chen Zhou, Huixin Liu, Zhitao Du, Yi Liu, Jiaqi Zhao, Zhibin Yu, Zhengyu Zhao, Xueshang Feng

研究成果: ジャーナルへの寄稿学術誌査読

3 被引用数 (Scopus)

抄録

The Constellation Observing System for Meteorology, Ionosphere, and Climate radio occultation S4 indices measurements are used to investigate the global structure and seasonal variations of tidal components in the sporadic-E (Es) layer. The diurnal tidal amplitude in the Es layer intensity and occurrence rate shows a wave-4 longitudinal structure, which is due to the diurnal tidal components of zonal wave numbers s = −3 (eastward, DE3). The wave-4 longitudinal pattern is also observed in the semidiurnal tide during spring and winter, which mostly results from the combination of semidiurnal components of zonal wave numbers s = −2 (eastward, SE2), s = 2 (westward, SW2). In addition, the semidiurnal tidal amplitude in Es layers presents obvious seasonal variability, and it dominates in the northern hemisphere during spring and summer and in the southern hemisphere during autumn and winter. Furthermore, the total semidiurnal tidal amplitude in Es layers in the northern hemisphere is greater than that in the southern hemisphere. Another important finding is that the diurnal tidal pattern at the lower altitude (below 102 km) Es layer is different from that of the higher altitude (above 102 km) Es layer and is also different from that of wind, which supports that the wind shear theory is inapplicable for the Es layer formation at low altitude proposed by many researchers.

本文言語英語
論文番号e2022JA030711
ジャーナルJournal of Geophysical Research: Space Physics
127
10
DOI
出版ステータス出版済み - 10月 2022

!!!All Science Journal Classification (ASJC) codes

  • 地球物理学
  • 宇宙惑星科学

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