Ionosphere fluctuations and global indices: A scale dependent wavelet-based cross-correlation analysis

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F12%3A00482664" target="_blank" >RIV/68378289:_____/12:00482664 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.jastp.2012.03.014" target="_blank" >http://dx.doi.org/10.1016/j.jastp.2012.03.014</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jastp.2012.03.014" target="_blank" >10.1016/j.jastp.2012.03.014</a>

Result language

angličtina

Original language name

Ionosphere fluctuations and global indices: A scale dependent wavelet-based cross-correlation analysis

Original language description

Ionosphere corresponds to the ionized upper part of atmosphere. Characterizing Ionosphere variations is of major importance to address both practical (radio-communications and navigation systems) and theoretical (Space-Earth coupling, climatological global change, and human activity impact) issues. Therefore, establishing a statistical description of Ionosphere variations and relating them to potential driving sources such as global solar and geomagnetic activities constitute important stakes. often, Ionosphere variations are described in terms of long-term trends versus short-term fluctuations. To better ground such a separation, instead of performing a classical and arbitrary low-pass versus high-pass filtering operation, it is here, instead, propose to recourse to a scale dependent analysis. It is based on a (continuous) wavelet transform and the wavelet coherence function. Applied to F2-region critical frequency data, locally measured at 11 mid-latitude European stations, as well as to five global solar and geomagnetic indices, these tools show that Ionospheric variations are well described by the superimposition of well-defined long-term cycles with highly correlated fractional Gaussian noise fluctuations. Also, they show that mid-latitude European stations display highly correlated variations even for short-term fluctuations and that, while solar activity mostly drives long-term cycles, short-term fluctuations and scaling properties are essentially controlled by geomagnetic activity.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10509 - Meteorology and atmospheric sciences

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2012

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Atmospheric and Solar-Terrestrial Physics

ISSN

1364-6826

e-ISSN

—

Volume of the periodical

90-91

Issue of the periodical within the volume

Special Issue

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

186-197

UT code for WoS article

000311594900022

EID of the result in the Scopus database

2-s2.0-84878716599