edu.ucar.opensky::articles:26809 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T19:01:01.521262 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7028w86 Observations on the variations of the field-aligned irregularities in the plasma bubbles at low-latitudes of China 2023-11-23T00:00:00Z publication https://n2t.org/ark:/85065/d7028w86 https://doi.org/10.1029/2023JA031890 Jia, W. author Chen, G. author Xu, J. author Yan, C. author Wu, Kun author Zhang, S. author Zhang, M. author Yuan, W. author Li, Y. author Gong, W. author Hu, P. author UCAR/NCAR - Library publisher The concurrent observation of the Hainan COherent Scatter Phased Array Radar (HCOPAR) and the 630 nm all-sky airglow imager was carried out on the night of 13 April 2015 in low-latitudes of China. The plasma bubble recorded by the airglow imager and the Field-Aligned Irregularities (FAIs) observed by the HCOPAR kept a good consistency. At the beginning, the FAIs were found to fill the entire plasma bubble, and they were drifting eastward together. During the dissipation process, the plasma bubble became wider and wider in zonal direction, while the airglow gray gradient on the eastern and western walls of the bubble had no much changes. Simultaneously, the echo Signal-to-Noise Ratio (SNR) of the irregularities in the bubble became lower and lower. The SNR at the depletion center decreased fastest, and the SNR of the FAIs on the western wall of the bubble fell more slowly than those in other parts. Polarization electric field in the bubble is suggested to have influence on the distribution of the FAIs. Gradient drift instability on the western wall supported the FAIs to live longer, and the FAIs on the eastern wall, namely on the front edge of the bubble, dissipated more rapidly. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2023 American Geophysical Union (AGU). None eng geoscientificInformation