On the Observability of the Time-Variable Lithospheric Signal in Satellite Magnetic Data

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F19%3A00511932" target="_blank" >RIV/67985815:_____/19:00511932 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/s10712-019-09546-8" target="_blank" >https://doi.org/10.1007/s10712-019-09546-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10712-019-09546-8" target="_blank" >10.1007/s10712-019-09546-8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On the Observability of the Time-Variable Lithospheric Signal in Satellite Magnetic Data

Popis výsledku v původním jazyce

We first inverted the magnetic field vector from CHAOS-6 over degrees 21-120, after subtraction of a remanent model, to a vertically integrated susceptibility map. Using this susceptibility distribution and taking into account the evolving core fields from the CHAOS-6 model, the time-varying lithospheric signal is computed. The results depend on the time span and the altitude considered, e.g., an altitude of 400 km and a span of 17 years can produce more than 0.5 nT variations resulting in a peak-to-peak value of nearly 1 nT. The vertically integrated quantities appear to be a useful choice for parameterising lithospheric time variations, also for providing data corrections at the satellite altitude. The effect of the choice of the core field, which enters the inversion, on the lithospheric time variation is also studied-this effect is found less important even for core fields 20 years apart.

Název v anglickém jazyce

On the Observability of the Time-Variable Lithospheric Signal in Satellite Magnetic Data

Popis výsledku anglicky

We first inverted the magnetic field vector from CHAOS-6 over degrees 21-120, after subtraction of a remanent model, to a vertically integrated susceptibility map. Using this susceptibility distribution and taking into account the evolving core fields from the CHAOS-6 model, the time-varying lithospheric signal is computed. The results depend on the time span and the altitude considered, e.g., an altitude of 400 km and a span of 17 years can produce more than 0.5 nT variations resulting in a peak-to-peak value of nearly 1 nT. The vertically integrated quantities appear to be a useful choice for parameterising lithospheric time variations, also for providing data corrections at the satellite altitude. The effect of the choice of the core field, which enters the inversion, on the lithospheric time variation is also studied-this effect is found less important even for core fields 20 years apart.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10508 - Physical geography

Projekt

<a href="/cs/project/LG15003" target="_blank" >LG15003: Kalibrace akcelerometrù kosmické mise SWARM na základì kinematické dráhy a modelù gravitaèního pole</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Surveys in Geophysics

ISSN

1573-0956

e-ISSN

—

Svazek periodika

40

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

15

Strana od-do

1229-1243

Kód UT WoS článku

000484978000008

EID výsledku v databázi Scopus

2-s2.0-85071607567