J. Space Weather Space Clim.
Volume 4, 2014
|Number of page(s)||6|
|Published online||04 August 2014|
GPS scintillation effects associated with polar cap patches and substorm auroral activity: direct comparison
Department of Physics, University of Oslo, PO Box 1048 Blindern, NO-0316
2 Arctic Geophysics, University Centre in Svalbard, N-9171 Longyearbyen, Norway
* Corresponding author: email@example.com
Accepted: 2 July 2014
We directly compare the relative GPS scintillation levels associated with regions of enhanced plasma irregularities called auroral arcs, polar cap patches, and auroral blobs that frequently occur in the polar ionosphere. On January 13, 2013 from Ny-Ålesund, several polar cap patches were observed to exit the polar cap into the auroral oval, and were then termed auroral blobs. This gave us an unprecedented opportunity to compare the relative scintillation levels associated with these three phenomena. The blobs were associated with the strongest phase scintillation (σϕ), followed by patches and arcs, with σϕ up to 0.6, 0.5, and 0.1 rad, respectively. Our observations indicate that most patches in the nightside polar cap have produced significant scintillations, but not all of them. Since the blobs are formed after patches merged into auroral regions, in space weather predictions of GPS scintillations, it will be important to enable predictions of patches exiting the polar cap.
Key words: Irregularities / Blobs / Aurora / Ionosphere (polar) / Polar cap
© Y. Jin et al., Published by EDP Sciences 2014
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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