Results 111 to 120 of about 3,197,364 (211)

Turbulence in Earth’s core generates large topographic torques on the mantle

Communications Earth & Environment
e Seismic and geodynamic studies indicate that the boundary between the Earth’s liquid outer core and solid mantle is not spherical, but is likely characterized by topography in the form of inverted mountains and valleys that have typical amplitudes of ...
Tobias G. Oliver, Eric G. Blackman, John A. Tarduno, Michael A. Calkins   +3 more
doaj   +1 more source

Transboundary Spanning in Social Movements: Organizational Structure and Antiracism in the US Extinction Rebellion Movement

Sociological Forum, EarlyView.
ABSTRACT This paper introduces transboundary spanning as a novel concept for social movement analysis. Using Extinction Rebellion (XR) in the United States as a case study, we examine the relational dynamics of social movement boundary spanning: processes wherein actors and organizations engage across symbolic boundaries.
Tobias Müller, Peter Gardner
wiley   +1 more source

How P‐Wave Scattering Throughout the Entire Mantle Mimics the High‐Frequency Pdiff and Its Coda

Geophysical Research Letters
We document the arrival of seismic energy in the core shadow zone up to large distances beyond 150° more than 100 s prior to the core phases. Numerical simulations of the energy transport in an established heterogeneity model show that scattering ...
Tuo Zhang, Christoph Sens‐Schönfelder, Marcelo Bianchi, Klaus Bataille   +3 more
doaj   +1 more source

What is a Multi‐Ethnic Party and How to Spot a Fake One?

Swiss Political Science Review, EarlyView.
Abstract Multi‐ethnic parties have been variously defined: as those which do not champion the interests of, or mobilize against, any specific ethnic group; as those with a recognisably cross‐communal leadership or membership; and as those which acquire some distribution of support across groups.
Jon Fraenkel
wiley   +1 more source

Strong seismic scatterers near the core-mantle boundary north of the Pacific Anomaly

, 2016
Tomographic images have shown that there are clear high-velocity heterogeneities to the north of the Pacific Anomaly near the core–mantle boundary (CMB), but the detailed structure and origin of these heterogeneities are poorly known.
Huerta, Audrey D., Audrey Huerta, Lianxing Wen, Rick Aster, Terry Wilson, Nyblade, Andrew, Wen, Lianxing, Sun, Xinlei, Xiaolong Ma, Ma, Xiaolong, Sridhar Anandakrishnan, Wiens, Douglas A., Aster, Rick, Anandakrishnan, Sridhar, Douglas A. Wiens, Huerta, Audrey, Andrew Nyblade, Wilson, Terry, Xinlei Sun, Weins, Douglas A.   +19 more
core   +1 more source

The earth’s core: an approach from first principles [PDF]

, 2004
The Earth’s core is largely composed of iron (Fe), alloyed with less dense elements such as sulphur, silicon and/or oxygen. The phase relations and physical properties of both solid and liquid Fe-alloys are therefore of great geophysical importance. As
Gillan, M.J., Vočadlo, L., L. Vočadlo, M. J. Gillan, G. David Price, G. D. Price, D. Alfè, Price, G.D., Alfè, D.   +8 more
core  

A model for the geomagnetic field reversal rate and constraints on the heat flux variations at the core-mantle boundary. [PDF]

Sci Rep, 2020
Carbone V, Alberti T, Lepreti F, Vecchio A.   +3 more
europepmc   +1 more source

Seeing the unseen: hyperspectral imaging opens a new window into the root economics space

New Phytologist, EarlyView.
Boris Rewald
wiley   +1 more source

Reflection and transmission from a plane layered core-mantle boundary [PDF]

, 1967
A class of transfer functions in terms of layer matrices is derived, giving the transmission and reflection of plane harmonic P or S waves incident from either side of a plane layered core-mantle boundary.
Teng, Ta-Liang
core  

On the core-mantle thermal and chemical coupling: Review and perspectives

, 2019
Introduction: On the core-mantle thermal and chemical coupling in terms of the long-term evolution of Earth’s mantle and core, there are mainly two approaches for explaining the magnetic evolution provided from paleomagnetic data [1] and heat budget ...
Nakagawa, T
core