Results 91 to 100 of about 733 (165)

Investigating geomagnetic jerks using spatial gradient tensor secular variation data.

, 2023
The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)
Madsen, F., Whaler, K., Hammer, M., Holme, R., Brown, W., Beggan, C.   +5 more
openaire   +2 more sources

A core-surface flow model derived from magnetic data of Macau Science Satellite-1

Earth and Planetary Physics
The core-surface flow is crucial for understanding the dynamics of the Earth’s outer core and geomagnetic secular variations. Conventional core flow models often use a single set of spherical harmonic coefficients to represent the flow both inside and ...
JinFeng Li, YuFeng Lin, HongBo Yao, JuYuan Xu, Keke Zhang   +4 more
doaj   +1 more source

Dynamic Mode Decomposition of the Core Surface Flow Inverted From Geomagnetic Field Models

Geophysical Research Letters
Continuous satellite measurements of the Earth's magnetic field have advanced the characterization of spatial‐temporal variations of the main field over the past two decades.
Jinfeng Li, Yufeng Lin, Keke Zhang
doaj   +1 more source

Identification of the magnetic external component in annual and monthly means of magnetic observatory data series [PDF]

, 2012
Tese de mestrado em Ciências Geofísicas (Geofísica Interna), apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2012O campo geomagnético medido nos observatórios magnéticos à superfície da Terra contém contribuições de fontes ...
Saturnino, Diana Filipa Lourenço
core  

Core-mantle boundary deformations and J2 variations resulting from the 2004 Sumatra earthquake

, 2007
The deformation at the core-mantle boundary produced by the 2004 Sumatra earthquake is investigated by means of a semi-analytic theoretical model of global coseismic and postseismic deformation, predicting a millimetric coseismic perturbation over a ...
A. Piersanti, Alfonsi, Banerjee, Bloxham, Boschi, Boschi, Chao, Chao, Cheng, Cox, D. Melini, Dumberry, Dumberry, Dziewonski, Dziewonski, F. Florindo, Florindo, Florindo, Gross, Lambeck, Marquart, Mitrovica, Nostro, P. De Michelis, Park, Piersanti, Piersanti, Pollitz, Sabadini, Tsai, V. Cannelli   +30 more
core   +1 more source

Geomagnetic jerks [PDF]

, 2007
Macmillan, Susan, British Geological Survey   +1 more
openaire   +3 more sources

New Model Shines Spotlight on Geomagnetic Jerks

Eos, 2019
Scientists get one step closer to being able to predict jerks—notoriously capricious changes to Earth’s geomagnetic field detectable by satellites.
openaire   +1 more source

GEOMAGNETIC JERK AS CHAOTIC FLUCTUATION

, 2013
[1] The geomagnetic field is chaotic and can be characterized by a mean exponential time scale   after which it is no longer predictable. It is also ergodic, so time analyses can substitute the more difficult phase space analyses. Taking advantage of these two properties of the Earth's magnetic field, a scheme of processing global geomagnetic models in
Mioara Mandea, Anahit Simonyan, A. De Santis, Anca Isac, Bejo Duka, E. Qamili, E. Qamili   +6 more
openaire   +1 more source

A radiocarbon spike at 14 300 cal yr BP in subfossil trees provides the impulse response function of the global carbon cycle during the Late Glacial. [PDF]

Philos Trans A Math Phys Eng Sci, 2023
Bard E, Miramont C, Capano M, Guibal F, Marschal C, Rostek F, Tuna T, Fagault Y, Heaton TJ.   +8 more
europepmc   +1 more source

The scientific case for magnetic field satellites [PDF]

To make full use of modern magnetic data and the paleomagnetic record, we must greatly improve our understanding of how the geodynamo system works. It is clearly nonlinear, probably chaotic, and its dimensionless parameters cannot yet be reproduced on a ...
Backus, George E., Benton, Edward R., Harrison, Christopher G. A., Heirtzler, James R.   +3 more
core   +1 more source