SOLAR SIGNATURES WITHIN ATMOSPHERIC AND IONOSPHERIC PARAMETERS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F17%3A00477413" target="_blank" >RIV/68378289:_____/17:00477413 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

SOLAR SIGNATURES WITHIN ATMOSPHERIC AND IONOSPHERIC PARAMETERS

Popis výsledku v původním jazyce

We have analyzed time series of solar data together with the atmospheric and ionosphericnmeasurements for last four solar cycles according to their availability. Within data of 1-daynsampling rate, we have searched for common spectral domains. As a convenient mathematicalntool we used Continuous Wavelet Transform (CWT) that is favorable for detection of wave-likenoscillations with limited duration and variable period. Then we looked for common oscillationndomains in the datasets using Wavelet Transform Coherence (WTC), which is a measure of thenintensity of the covariance of the two series in time-period space with stable phase difference.nDespite wide oscillation ranges detected by mean of CWT we found only limited domains bynmean of WTC, particularly significant high power domains (with stable phase difference) fornperiods 1 month, 2 months, 6 months, 1 year and 2 years between pairs of solar data, andnatmospheric or ionospheric data. The detected domains vary during particular solar cycle andnfrom cycle to the following one. These results indicate the changing solar forcing of thenatmosphere and/or its sensitivity with time.

Název v anglickém jazyce

SOLAR SIGNATURES WITHIN ATMOSPHERIC AND IONOSPHERIC PARAMETERS

Popis výsledku anglicky

We have analyzed time series of solar data together with the atmospheric and ionosphericnmeasurements for last four solar cycles according to their availability. Within data of 1-daynsampling rate, we have searched for common spectral domains. As a convenient mathematicalntool we used Continuous Wavelet Transform (CWT) that is favorable for detection of wave-likenoscillations with limited duration and variable period. Then we looked for common oscillationndomains in the datasets using Wavelet Transform Coherence (WTC), which is a measure of thenintensity of the covariance of the two series in time-period space with stable phase difference.nDespite wide oscillation ranges detected by mean of CWT we found only limited domains bynmean of WTC, particularly significant high power domains (with stable phase difference) fornperiods 1 month, 2 months, 6 months, 1 year and 2 years between pairs of solar data, andnatmospheric or ionospheric data. The detected domains vary during particular solar cycle andnfrom cycle to the following one. These results indicate the changing solar forcing of thenatmosphere and/or its sensitivity with time.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

<a href="/cs/project/GA15-24688S" target="_blank" >GA15-24688S: Proměnlivost ionosféry a neutrální atmosféry ve středních šířkách</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

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