Articles | Volume 38, issue 2
Regular paper
24 Apr 2020
Regular paper |  | 24 Apr 2020

Plasma density gradients at the edge of polar ionospheric holes: the absence of phase scintillation

Luke A. Jenner, Alan G. Wood, Gareth D. Dorrian, Kjellmar Oksavik, Timothy K. Yeoman, Alexandra R. Fogg, and Anthea J. Coster

Related authors

A case study of the large-scale traveling ionospheric disturbances in the eastern Asian sector during the 2015 St. Patrick's Day geomagnetic storm
Jing Liu, Dong-He Zhang, Anthea J. Coster, Shun-Rong Zhang, Guan-Yi Ma, Yong-Qiang Hao, and Zuo Xiao
Ann. Geophys., 37, 673–687,,, 2019
Statistical framework for estimating GNSS bias
Juha Vierinen, Anthea J. Coster, William C. Rideout, Philip J. Erickson, and Johannes Norberg
Atmos. Meas. Tech., 9, 1303–1312,,, 2016
Short summary

Related subject area

Subject: Earth's ionosphere & aeronomy | Keywords: Polar ionosphere
Fine-scale dynamics of fragmented aurora-like emissions
Daniel K. Whiter, Hanna Sundberg, Betty S. Lanchester, Joshua Dreyer, Noora Partamies, Nickolay Ivchenko, Marco Zaccaria Di Fraia, Rosie Oliver, Amanda Serpell-Stevens, Tiffany Shaw-Diaz, and Thomas Braunersreuther
Ann. Geophys., 39, 975–989,,, 2021
Short summary
Polar tongue of ionisation during geomagnetic superstorm
Dimitry Pokhotelov, Isabel Fernandez-Gomez, and Claudia Borries
Ann. Geophys., 39, 833–847,,, 2021
Short summary
Characteristics of fragmented aurora-like emissions (FAEs) observed on Svalbard
Joshua Dreyer, Noora Partamies, Daniel Whiter, Pål G. Ellingsen, Lisa Baddeley, and Stephan C. Buchert
Ann. Geophys., 39, 277–288,,, 2021
Short summary
AMPERE polar cap boundaries
Angeline G. Burrell, Gareth Chisham, Stephen E. Milan, Liam Kilcommons, Yun-Ju Chen, Evan G. Thomas, and Brian Anderson
Ann. Geophys., 38, 481–490,,, 2020
Short summary
Characteristics of the layered polar mesosphere summer echoes occurrence ratio observed by EISCAT VHF 224 MHz radar
Shucan Ge, Hailong Li, Tong Xu, Mengyan Zhu, Maoyan Wang, Lin Meng, Safi Ullah, and Abdur Rauf
Ann. Geophys., 37, 417–427,,, 2019
Short summary

Cited articles

Aarons, J.: Global Morphology of Ionospheric Scintillations, Proc. IEEE, 70, 4, 360–378,, 1982. 
Alfonsi, L., Spogli, L., De Franceschi, G., Romano, V., Aquino, M., Dodson, A., and Mitchell, C. N.: Bipolar climatology of GPS ionospheric scintillation at solar minimum, Radio Sci., 46, RS0D05,, 2011. 
Anderson, D. N., Buchau, J., and Heelis, R. A.: Origin of density enhancements in the winter polar cap ionosphere, Radio Sci., 23, 513–519,, 1988. 
Benson, R. and Grebowsky, J.: Extremely low ionospheric peak altitudes In the polar hole region, Radio Sci., 36, 277–285,, 2001. 
Briggs, B. H. and Parkin, I. A.: On the variation of radio star and satellite scintillation with zenith angle, J. Amos. Terr. Phys., 25, 339–365,, 1963. 
Short summary
The boundary of regions with a plasma density much lower than background was investigated in the northern polar cap using observations of ionospheric plasma density. Similar regions with an above-background density have been linked to fluctuations in phase and amplitude in radio waves traversing the density gradient at their boundary. These fluctuations were absent through the gradient in the below-background regions; thus, a minimum of both density and gradient are required for scintillation.