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Ionospheric response to solar EUV variations: Preliminary results

Vaishnav, Rajesh and Jacobi, Christoph and Berdermann, Jens and Schmölter, Erik and Codrescu, M. V. (2018) Ionospheric response to solar EUV variations: Preliminary results. Advances in Radio Science, 16, pp. 157-165. Copernicus Publications. DOI: 10.5194/ars-16-157-2018 ISSN 1684-9965

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Official URL: https://www.adv-radio-sci.net/16/157/2018/

Abstract

We investigate the ionospheric response to solar Extreme Ultraviolet (EUV) variations using different proxies, based on solar EUV spectra observed from the Solar Extreme Ultraviolet Experiment (SEE) onboard the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite, the F10.7 index (solar irradiance at 10.7cm), and the Bremen composite Mg-II index during January 2003 to December 2016. The daily mean solar proxies are compared with global mean Total Electron Content (GTEC) values calculated from global IGS TEC maps. The preliminary analysis shows a significant correlation between GTEC and both the integrated flux from SEE and the Mg II index, while F10.7 correlates less strongly with GTEC. The correlations of EUV proxies and GTEC at different time periods are presented. An ionospheric delay in GTEC is observed at the 27 days solar rotation period with the time scale of about  ∼ 1–2 days. An experiment with the physics based global 3-D Coupled Thermosphere/Ionosphere Plasmasphere electrodynamics (CTIPe) numerical model was performed to reproduce the ionospheric delay. Model simulations were performed for different values of the F10.7 index while keeping all the other model inputs constant. Preliminary results qualitatively reproduce the observed  ∼ 1–2 days delay in GTEC, which is might be due to vertical transport processes.

Item URL in elib:https://elib.dlr.de/121767/
Document Type:Article
Title:Ionospheric response to solar EUV variations: Preliminary results
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Vaishnav, RajeshLeipzig Institute for Meteorology, Universität LeipzigUNSPECIFIED
Jacobi, ChristophInstitute for Meteorology, University of LeipzigUNSPECIFIED
Berdermann, JensJens.Berdermann (at) dlr.dehttps://orcid.org/0000-0002-3308-4584
Schmölter, ErikErik.Schmoelter (at) dlr.deUNSPECIFIED
Codrescu, M. V.SWPC, NOAA, BoulderUNSPECIFIED
Date:4 September 2018
Journal or Publication Title:Advances in Radio Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:No
Volume:16
DOI :10.5194/ars-16-157-2018
Page Range:pp. 157-165
Publisher:Copernicus Publications
ISSN:1684-9965
Status:Published
Keywords:Ionosphere, EUV, F10.7, CTIPe, TEC
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Vorhaben Ionosphäre
Location: Neustrelitz
Institutes and Institutions:Institute of Communication and Navigation
Institute of Communication and Navigation > Navigation
Deposited By: Berdermann, Dr Jens
Deposited On:20 Sep 2018 12:04
Last Modified:10 Jul 2019 11:27

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