Polar Ionospheric Large‐Scale Structures and Dynamics Revealed by TEC Keogram Extracted From TEC Maps
Name
JGR Space Physics - 2020 - Wang - Polar Ionospheric Large‐Scale Structures and Dynamics Revealed by TEC Keogram Extracted.pdf
Description
Published version
Size
6.04 MB
Format
Adobe PDF
Checksum (MD5)
1e734b3f632004ac5374af6a63a2ff5a
Author(s)
Wang, Y
Zhang, Q‐H
Ma, Y‐Z
Jayachandran, PT
Xing, Z‐Y
Balan, N
Zhang, S‐R
Date Issued
December 30, 2019
Journal
Journal of Geophysical Research: Space Physics
Publisher
American Geophysical Union
Citation
Wang, Y., Zhang, Q.-H., Ma, Y.-Z., Jayachandran, P. T., Xing, Z.-Y., Balan, N., & Zhang, S.-R. (2020). Polar ionospheric large-scale structures and dynamics revealed by TEC keogram extracted from TEC maps. Journal of Geophysical Research: Space Physics, 125, e2019JA027020.
Version
Final published version
Abstract
A method named total electron content (TEC) keogram is introduced for surveying the large‐scale irregularities continuously in the polar ionosphere. The TEC keogram is developed from a movie of TEC maps along various meridian lines from the dayside to the nightside across the magnetic pole, trying to identify and track several types of ionospheric structures. Through two examples, a clear train of polar cap patches are identified from TEC keogram and confirmed by SuperDARN radar observations. The motion speed of these patches estimated from this tool agrees with SuperDARN radar measurements. Then, the motions of patches relative to the background convection through the whole polar cap are statistically studied for the first time. Moreover, the occurrence dependence of fully tracked patches on months, UT hours, and interplanetary magnetic field conditions is generally consistent with previous reports. These results suggest that the TEC keogram offers a power tool for continuous monitoring and studying of large‐scale plasma irregularities in the polar ionosphere.
MIT Department
Haystack Observatory
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1029/2019ja027020
