Analytics of planetary rotation: Improved physics with implications for the shape and super-rotation of Earth's core
Sign Up to like & getrecommendations! Published in 2019 at "Earth-Science Reviews"
DOI: 10.1016/j.earscirev.2019.01.024
Abstract: Abstract The basis of the famous equation attributed to Maclaurin (1742), which relates the ellipticity of homogeneous spheroids to their rotation rate, is reviewed and Todhunter's (1873) neglected but important contribution is recognized. The relationship… read more here.
Keywords: earth core; physics; earth; super rotation ... See more keywords
Melting experiments on the Fe–C binary system up to 255 GPa: Constraints on the carbon content in the Earth's core
Sign Up to like & getrecommendations! Published in 2019 at "Earth and Planetary Science Letters"
DOI: 10.1016/j.epsl.2019.03.020
Abstract: Abstract Phase relations, including the eutectic liquid composition in the Fe–C binary system, remain unclear under the core pressure range, which makes estimating the carbon budget in the Earth's core difficult. To explore this issue,… read more here.
Keywords: binary system; 255 gpa; earth core; core ... See more keywords
Uranium and thorium partitioning in the bulk silicate Earth and the oxygen content of Earth’s core
Sign Up to like & getrecommendations! Published in 2020 at "Geochimica et Cosmochimica Acta"
DOI: 10.1016/j.gca.2020.02.010
Abstract: Abstract This study investigates the partitioning of U and Th between molten metal and silicate liquid (DU and DTh) during Earth’s core-mantle differentiation. We report new Th partition coefficients between chondritic silicate melt and various… read more here.
Keywords: earth core; silicate; earth; oxygen content ... See more keywords
Stress-based velocity correction for evaluating the shear-wave velocity of the earth core of a rockfill dam
Sign Up to like & getrecommendations! Published in 2019 at "Soil Dynamics and Earthquake Engineering"
DOI: 10.1016/j.soildyn.2019.105785
Abstract: Abstract Shear-wave velocity of an earth core of a rockfill dam is an important input parameter for earthquake site response. The shear-wave velocity should be measured in situ by a non-destructive method. However, this is… read more here.
Keywords: shear wave; velocity; earth core; wave velocity ... See more keywords
Melting Curve and Phase Relations of Fe‐Ni Alloys: Implications for the Earth's Core Composition
Sign Up to like & getrecommendations! Published in 2020 at "Geophysical Research Letters"
DOI: 10.1029/2020gl088169
Abstract: Nickel is the second most abundant element in the Earth's core. However, the properties of Fe‐Ni alloys are still poorly constrained under planetary cores conditions, in particular concerning the effect of Ni on the melting… read more here.
Keywords: melting curve; earth core; curve; curve phase ... See more keywords
Thermal conductivity of Fe-Si alloys and thermal stratification in Earth’s core
Sign Up to like & getrecommendations! Published in 2021 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.2119001119
Abstract: Significance Earth’s liquid outer core is mainly composed of iron alloyed with ∼8 to 10% of light elements (e.g., silicon). Convection of the liquid core generates Earth’s magnetic field, which is controlled by the thermal… read more here.
Keywords: conductivity; thermal conductivity; temperature; earth core ... See more keywords
Prediction of crystal structures and motifs in the Fe–Mg–O system at Earth’s core pressures
Sign Up to like & getrecommendations! Published in 2021 at "New Journal of Physics"
DOI: 10.1088/1367-2630/ac0287
Abstract: Fe, Mg, and O are among the most abundant elements in terrestrial planets. While the behavior of the Fe–O, Mg–O, and Fe–Mg binary systems under pressure have been investigated, there are still very few studies… read more here.
Keywords: system; earth core; core pressures; earth ... See more keywords
Equatorially trapped waves in Earth’s core
Sign Up to like & getrecommendations! Published in 2019 at "Geophysical Journal International"
DOI: 10.1093/gji/ggz233
Abstract: Author(s): Buffett, B; Matsui, H | Abstract: © The Author(s) 2019. Published by Oxford University Press on behalf of The Royal Astronomical Society. Short-period fluctuations in geomagnetic acceleration are detected in recent satellite observations. A… read more here.
Keywords: earth core; mac waves; waves earth; trapped waves ... See more keywords
Synthesis of Xenon and Iron-Nickel Intermetallic Compounds at Earth's Core Thermodynamic Conditions.
Sign Up to like & getrecommendations! Published in 2018 at "Physical review letters"
DOI: 10.1103/physrevlett.120.096001
Abstract: Using in situ synchrotron x-ray diffraction and Raman spectroscopy in concert with first principles calculations we demonstrate the synthesis of stable Xe(Fe,Fe/Ni)_{3} and XeNi_{3} compounds at thermodynamic conditions representative of Earth's core. Surprisingly, in the case… read more here.
Keywords: synthesis xenon; nickel intermetallic; earth core; iron nickel ... See more keywords
Applications for CryoSat-2 satellite magnetic data in studies of Earth’s core field variations
Sign Up to like & getrecommendations! Published in 2021 at "Earth, Planets and Space"
DOI: 10.1186/s40623-021-01365-9
Abstract: We use 20 years of continuous magnetic field measurements from the Ørsted, CHAMP and Swarm satellite missions, supplemented by calibrated platform magnetometer data from the CryoSat-2 satellite, to study time variations of the Earth’s core… read more here.
Keywords: core field; field; earth core; cmb ... See more keywords