Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Johannes Wicht"'
Publikováno v:
Earth, Planets and Space, Vol 72, Iss 1, Pp 1-20 (2020)
Abstract The IGRF offers an important incentive for testing algorithms predicting the Earth’s magnetic field changes, known as secular variation (SV), in a 5-year range. Here, we present a SV candidate model for the 13th IGRF that stems from a sequ
Externí odkaz:
https://doaj.org/article/8bb6257947504b9595955bd3c22a5faf
Publikováno v:
Earth, Planets and Space, Vol 72, Iss 1, Pp 1-13 (2020)
Abstract We present a new model of the geomagnetic field spanning the last 20 years and called Kalmag. Deriving from the assimilation of CHAMP and Swarm vector field measurements, it separates the different contributions to the observable field throu
Externí odkaz:
https://doaj.org/article/e35dcb764ca243998eadb8a75ee93157
Autor:
Johannes Wicht, Thomas Gastine
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-4 (2020)
Since its arrival at Jupiter in 2016, NASA’s Juno spacecraft has been performing high-precision measurement of the gravity and magnetic fields. When combined with numerical simulations, they provide a unique window to the dynamics in the planet’s
Externí odkaz:
https://doaj.org/article/f80a3b68eb5b4e0aa3cc86a7615091c1
Publikováno v:
Frontiers in Earth Science, Vol 7 (2019)
Convection in the Earth's outer core is driven by buoyancy sources of both thermal and compositional origin. The thermal and compositional molecular diffusivities differ by several orders of magnitude, which can affect the dynamics in various ways. S
Externí odkaz:
https://doaj.org/article/cbb6c86770674d939d6d47b90648099e
Autor:
Wieland Dietrich, Johannes Wicht
Publikováno v:
Frontiers in Earth Science, Vol 6 (2018)
Many celestial objects are thought to host interfaces between convective and stable stratified interior regions. The interaction between both, e.g., the transfer of heat, mass, or angular momentum depends on whether and how flows penetrate into the s
Externí odkaz:
https://doaj.org/article/d8f6f21667b743b8a26f02ebf741c4af
Publikováno v:
Monthly Notices of the Royal Astronomical Society
The analysis of the recent gravity measurements of Jupiter and Saturn reveal that the zonal winds observed on their surfaces reach several thousand kilometres deep into their atmospheres. However, it remains unclear which mechanism prevents them from
Mercury possesses an internally generated global magnetic field which significantly differs from Earth’s magnetic field in geometry and strength. While being much weaker (1% of Earth’s surface field strength), Mercury’s magnetic field is strong
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::551a41bf19a8701a4446c8039a2fee57
https://doi.org/10.5194/egusphere-egu23-15588
https://doi.org/10.5194/egusphere-egu23-15588
The outer regions of both Gas Giants in our Solar System, Jupiter and Saturn, feature strong, alternately Eastward and Westward moving zonal winds. Cloud tracking has yielded latitudinal profiles of these winds, which are longitudinally invariant and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33f60801b00216168c25df5f466e4684
https://doi.org/10.5194/egusphere-egu23-15308
https://doi.org/10.5194/egusphere-egu23-15308
Publikováno v:
Geoscientific Model Development, Vol 14, Pp 7477-7495 (2021)
We discuss two parallelization schemes for MagIC, an open-source, high-performance, pseudo-spectral code for the numerical solution of the magnetohydrodynamics equations in a rotating spherical shell. MagIC calculates the non-linear terms on a numeri
Autor:
Andrew J. Biggin, Domenico G. Meduri, Courtney J. Sprain, Johannes Wicht, Richard K. Bono, Christopher J. Davies
Numerical geodynamo simulations capture several features of the spatial and temporal geomagnetic field variability on historical and Holocene timescales. However, a recent analysis questioned the a...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::38dc0118d14bbd816d46ccbf2236cf55