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Comparing the Trend of F2-layer PlanetaryWave Type Oscillations with Stratospheric PlanetaryWaves Activity in Midlatitudes during 2002 to 2008

Borries, Claudia and Jakowski, Norbert and Jacobi, Christoph and Hoffmann, Peter (2010) Comparing the Trend of F2-layer PlanetaryWave Type Oscillations with Stratospheric PlanetaryWaves Activity in Midlatitudes during 2002 to 2008. EGU General Assembly 2010, 03.-07. Mai 2010, Wien, Österreich.

Full text not available from this repository.

Abstract

Regional maps of Total Electron Content, covering the Northern Hemisphere from 50°N to the North Pole, are used to derive a first trend of the F2-layer ionosphere oscillations with periods between 2 to 30 days (so called planetary wave type oscillations, PWTO). Oscillations forced by quasi-periodic variations of solar signals (e.g. EUV irradiation and solar wind) are identified and separated using wavelet transformation. It is found that up to 45% of the PWTO in the F2-layer ionosphere occur due to solar variability. The signals which are not obviously related to solar variability are spectrally decomposed to characterize oscillations by their period and wavenumber. Trend analyses of the occurring oscillations reveal similarities to stratospheric planetary waves (PW). The dominant oscillations have typical periods of PW, the strongest wave activity is during winter and the wave activity maximizes at similar latitudes. But there are also major differences to stratospheric PW. In the ionosphere zonal mean oscillations are dominant, stationary waves are quite weak and the dominant periods are shorter. The results agree with recent numerical modelling results which showed no stationary wave penetration into the F2-region ionosphere and only fast short period waves propagating up to the lower thermosphere.

Item URL in elib:https://elib.dlr.de/64113/
Document Type:Conference or Workshop Item (Poster)
Title:Comparing the Trend of F2-layer PlanetaryWave Type Oscillations with Stratospheric PlanetaryWaves Activity in Midlatitudes during 2002 to 2008
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Borries, Claudiaclaudia.borries (at) dlr.deUNSPECIFIED
Jakowski, NorbertUNSPECIFIEDUNSPECIFIED
Jacobi, ChristophInstitute for Meteorology, University of Leipzig, GermanyUNSPECIFIED
Hoffmann, PeterInstitute for Meteorology, University of Leipzig, GermanyUNSPECIFIED
Date:5 May 2010
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Ionosphere, TEC, planetary waves, solar forcing
Event Title:EGU General Assembly 2010
Event Location:Wien, Österreich
Event Type:international Conference
Event Dates:03.-07. Mai 2010
Organizer:EGU
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Ionosphärenerkundung (old)
Location: Neustrelitz
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Borries, Dr. Claudia
Deposited On:08 Jun 2010 11:39
Last Modified:08 Jun 2010 11:39

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