Combination of geo-magnetic jerks with updated ESMGFZ effective angular momentum functions for the modelling of polar motion excitation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F19%3A00521618" target="_blank" >RIV/67985815:_____/19:00521618 - isvavai.cz</a>

Výsledek na webu

<a href="http://hdl.handle.net/11104/0306222" target="_blank" >http://hdl.handle.net/11104/0306222</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.13168/AGG.2019.0030" target="_blank" >10.13168/AGG.2019.0030</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Combination of geo-magnetic jerks with updated ESMGFZ effective angular momentum functions for the modelling of polar motion excitation

Popis výsledku v původním jazyce

We use numerical integration of Brzezinski's broad-band Liouville equations with the new atmospheric/oceanic excitations provided by GFZ Potsdam to calculate their effect on polar motion. There exist several studies hinting that geomagnetic jerks, sudden changes of intensity of geomagnetic field, can also affect polar motion. We concentrate our efforts to study possible influence of geomagnetic jerks on temporal changes of polar motion. We demonstrate that the fit between integrated and polar motion observed by space geodesy improves substantially, if the influence of geomagnetic jerks is added to excitations by geophysical fluids. We also applied additional excitations due to the continental hydrosphere and barystatic sea-level variations. Although these effects complete the geophysical fluids system, their adding could not improve the agreement between integrated and observed polar motion.

Název v anglickém jazyce

Combination of geo-magnetic jerks with updated ESMGFZ effective angular momentum functions for the modelling of polar motion excitation

Popis výsledku anglicky

We use numerical integration of Brzezinski's broad-band Liouville equations with the new atmospheric/oceanic excitations provided by GFZ Potsdam to calculate their effect on polar motion. There exist several studies hinting that geomagnetic jerks, sudden changes of intensity of geomagnetic field, can also affect polar motion. We concentrate our efforts to study possible influence of geomagnetic jerks on temporal changes of polar motion. We demonstrate that the fit between integrated and polar motion observed by space geodesy improves substantially, if the influence of geomagnetic jerks is added to excitations by geophysical fluids. We also applied additional excitations due to the continental hydrosphere and barystatic sea-level variations. Although these effects complete the geophysical fluids system, their adding could not improve the agreement between integrated and observed polar motion.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Acta geodynamica et geomaterialia

ISSN

1214-9705

e-ISSN

—

Svazek periodika

16

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

5

Strana od-do

359-363

Kód UT WoS článku

000500942800003

EID výsledku v databázi Scopus

2-s2.0-85077902207