New determination of period and quality factor of Chandler wobble, considering geophysical excitations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00473879" target="_blank" >RIV/67985815:_____/17:00473879 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.asr.2016.12.001" target="_blank" >http://dx.doi.org/10.1016/j.asr.2016.12.001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.asr.2016.12.001" target="_blank" >10.1016/j.asr.2016.12.001</a>

Jazyk výsledku

angličtina

Název v původním jazyce

New determination of period and quality factor of Chandler wobble, considering geophysical excitations

Popis výsledku v původním jazyce

Polar motion consists of both free (Chandler wobble, with approximately 14-month period) and forced components. The latter are caused by different excitations of geophysical origin. Very long-periodic (or secular) part is most probably due to post-glacial rebound, shorter periodic part (with dominant annual period) are caused mainly by motions of the atmosphere and oceans. Recently it was also proposed that impulse-like excitations due to geomagnetic jerks might be responsible for rapid changes of the amplitude and phase of Chandler wobble. In order to precisely determine the parameters of the free part, it is necessary to consider all these influences. We use the IERS combined solution C04 together with ERA atmospheric/oceanic excitations in the interval 1974.0-2014.0, and also additional excitations due to nine geomagnetic jerks, registered during this interval, to determine the period and quality factor of Chandler wobble, free from these geophysical effects.

Název v anglickém jazyce

New determination of period and quality factor of Chandler wobble, considering geophysical excitations

Popis výsledku anglicky

Polar motion consists of both free (Chandler wobble, with approximately 14-month period) and forced components. The latter are caused by different excitations of geophysical origin. Very long-periodic (or secular) part is most probably due to post-glacial rebound, shorter periodic part (with dominant annual period) are caused mainly by motions of the atmosphere and oceans. Recently it was also proposed that impulse-like excitations due to geomagnetic jerks might be responsible for rapid changes of the amplitude and phase of Chandler wobble. In order to precisely determine the parameters of the free part, it is necessary to consider all these influences. We use the IERS combined solution C04 together with ERA atmospheric/oceanic excitations in the interval 1974.0-2014.0, and also additional excitations due to nine geomagnetic jerks, registered during this interval, to determine the period and quality factor of Chandler wobble, free from these geophysical effects.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA13-15943S" target="_blank" >GA13-15943S: Geofyzikální excitace v pohybu rotační osy Země</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

Název periodika

Advances in Space Research

ISSN

0273-1177

e-ISSN

—

Svazek periodika

59

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

1395-1407

Kód UT WoS článku

000394066000017

EID výsledku v databázi Scopus

2-s2.0-85008352531