Top 10 Eartharxiv Papers Today in Physical Sciences And Mathematics


1.997 Mikeys
#1. Source rupture process of the 2017 Mw 6.5 Jiuzhaigou, China, earthquake derived from a modified-strategy joint inversion of seismological and geodetic data
Ao Zheng, Xiangwei Yu, Wenbin Xu, Wenbo Zhang
With the development of science and technology, the observational means of earthquakes have become increasingly diverse. Combining multiple types of data to derive the source rupture process has been a developing trend of the kinematic inversion. Seismological and geodetic data are two types of data sources that have been widely used in the source inversion. The seismic waveform data provide precise timing and good temporal resolution to resolve the source rupture. The geodetic data, such as interferometric synthetic aperture radar (InSAR), have a high spatial resolution covering the epicenter. In order to utilize resolution capabilities of different data types simultaneously, we propose a modified-strategy joint inversion method based on seismological and geodetic data, and develop a revised form of differential smoothing constraint. With the combination of strong motion, teleseismic bady-wave and InSAR data, we resolve the source rupture process of the 2017 Mw 6.5 Jiuzhaigou earthquake. The inversion results reveal a bilateral...
more | pdf
Figures
None.
Tweets
Github
None.
Youtube
None.
Other stats
Sample Sizes : None.
Authors: 4
Total Words: 0
Unqiue Words: 0

1.996 Mikeys
#2. A comprehensive climate history of the last 800 thousand years
Mario Krapp, Robert Beyer, Stephen L. Edmundson, Paul J Valdes, Andrea Manica
A detailed and accurate reconstruction of past climate is essential in understanding the drivers that have shaped species, including our own, and their habitats. However, spatially-detailed climate reconstructions that continuously cover the Quaternary do not yet exist, mainly because no paleoclimate model can reconstruct regional-scale dynamics over geological time scales. Here we develop a new approach, the Global Climate Model Emulator (GCMET), which reconstructs the climate of the last 800 thousand years with unprecedented spatial detail. GCMET captures the temporal dynamics of glacial-interglacial climates as an Earth System Model of Intermediate Complexity would whilst resolving the local dynamics with the accuracy of a Global Climate Model. It provides a new, unique resource to explore the climate of the Quaternary, which we use to investigate the long-term stability of major habitat types. We identify a number of stable pockets of habitat that have remained unchanged over the last 800 thousand years, acting as potential...
more | pdf
Figures
Tweets
Github
None.
Youtube
None.
Other stats
Sample Sizes : [72, 10000, 50, 50, 72, 9]
Authors: 5
Total Words: 9229
Unqiue Words: 3395

0.0 Mikeys
#3. Interactions between glacier dynamics, ice structure, and climate at Fjallsjökul, south-east Iceland
Rebecca Dell, Rachel Carr, Professor Emrys Phillips, Professor Andrew Russell
Over recent decades, the number of lake-terminating outlet glaciers in Iceland has increased in line with climate warming. The mass balance changes of these lake-terminating outlet glaciers are sensitive to rising air temperatures, due to altered glacier dynamics and increased surface melt. This study aims to better understand the relationship between proglacial lake development, climate, glacier dynamics, and glacier structure at Fjallsjökull, a large, lake-terminating outlet glacier in south-east Iceland. We used satellite imagery to map glacier terminus position and lake extent between 1973 and 2016, and a combination of aerial and satellite imagery to map the structural architecture of the glacier’s terminus in 1982, 1994, and 2011. The temporal evolution of ice surface velocities between 1990 and 2017 was calculated using feature tracking. Statistically significant increases in the rate of terminus retreat and lake expansion were identified in 2001, 2009, and 2011. Our surface velocity and structural data sets revealed the...
more | pdf
Figures
Tweets
Github
None.
Youtube
None.
Other stats
Sample Sizes : None.
Authors: 4
Total Words: 13768
Unqiue Words: 3929

0.0 Mikeys
#4. Evolving flexure recorded in continental rift uplifting landscapes - Corinth Rift, Greece
David Fernández-Blanco, Gino de Gelder, Sean Gallen, Robin Lacassin, Rolando Armijo
Elastic flexure of the lithosphere is commonly used to model crustal mechanics, rheology and dynamics. However, accurate characterizations of flexure in nature at the spatiotemporal scale of active continental rifting (tens of km; 10^4-10^6 yr) are scant. We use exceptionally preserved geomorphic evidence in the asymmetric, young and fast-extending Corinth Rift, central Greece, to document the combined effect of progressive uplift and footwall flexure throughout its uplifting margin. Across the rift margin, footwall longitudinal river profiles and topography define uplift increasing exponentially towards the bounding fault. Along the rift margin, geomorphic proxies for fault’s footwall relief, slip rate and uplift rate show parabolic distributions decaying along strike away from the fault center. Conspicuous drainage reversals where the topographic expression of elastic flexure is most prominent similarly suggest that maximum slip rates occur at the rift center. Overall, the geomorphic evidence for flexure implies disruptive...
more | pdf
Figures
Tweets
Github
None.
Youtube
None.
Other stats
Sample Sizes : None.
Authors: 5
Total Words: 6667
Unqiue Words: 2181

0.0 Mikeys
#5. Structure and elasticity of phlogopite under compression: Geophysical implications
Tanvi Chheda
We investigated the response of the crystal structure, lattice parameters, and unit-cell volume of hydrous layered silicate phlogopite at conditions relevant to subduction zone settings. We have used first principles simulation based on density functional theory to calculate the equation of state and full elastic constant tensor. Based on the generalized gradient approximation, the full single crystal elastic constant tensor with monoclinic symmetry shows significant anisotropy with the compressional elastic constants: c11 = 181 GPa, c22 = 185 GPa, c33 = 62 GPa, the shear elastic constants c44 = 14 GPa, c55 = 20 GPa, c66 = 68 Ga, and c46 = -6 GPa; the off diagonal elastic constants c12 = 48 GPa, c13 = 12 GPa, c23 = 12 GPa, c15 = -16 GPa, c25 = -5 GPa and c35 = -1 GPa at zero pressure. The elastic anisotropy of phlogopite is lar- ger than most of the layered hydrous phases relevant in the subduction zone conditions. The shear anisotropy, AVS for phlogopite is ~77% at zero pressure condition and although it decreases upon...
more | pdf
Figures
Tweets
Github
None.
Youtube
None.
Other stats
Sample Sizes : None.
Authors: 1
Total Words: 7054
Unqiue Words: 2422

0.0 Mikeys
#6. Slow-slip events in semi-brittle serpentinite fault zones
Arjun Goswami, Sylvain Barbot
Slow-slip events are earthquake-like events only with much lower slip rates. While peak coseismic velocities can reach tens of meters per second, slow-slip is on the order of 1E-7 m/s and may last for days to weeks. Under the rate-and-state model of fault friction, slow-slip is produced only when the asperity size is commensurate with the critical nucleation size, a function of frictional properties. However, it is unlikely that all subduction zones embody the same frictional properties. In addition to friction, plastic flow of antigorite-rich serpentinite may significantly influence the dynamics of fault slip near the mantle wedge corner. Here, we show that the range of frictional parameters that generate slow slip is widened in the presence of a serpentinized layer along the subduction plate interface. We observe increased stability and damping of fast ruptures in a semi-brittle fault zone governed by both brittle and viscoelastic constitutive response. The rate of viscous serpentinite flow, governed by dislocation creep, is...
more | pdf
Figures
Tweets
Github
None.
Youtube
None.
Other stats
Sample Sizes : None.
Authors: 2
Total Words: 8493
Unqiue Words: 2607

0.0 Mikeys
#7. Neoproterozoic glacial origin of the Great Unconformity
C. Brenhin Keller, Jon M. Husson, Ross N Mitchell, William F Bottke, Thomas M Gernon, Patrick Boehnke, Elizabeth A Bell, Nicholas Swanson-Hysell, Shanan E Peters
The Great Unconformity, a profound gap in Earth's stratigraphic record often evident below the base of the Cambrian system, has remained among the most enigmatic field observations in Earth science for over a century. While long associated directly or indirectly with the occurrence of the earliest complex animal fossils, a conclusive explanation for the formation and global extent of the Great Unconformity has remained elusive. Here we show that the Great Unconformity is associated with a set of large global oxygen and hafnium isotope excursions in magmatic zircon that suggest a late Neoproterozoic crustal erosion and sediment subduction event of unprecedented scale. These excursions, the Great Unconformity, preservational irregularities in the terrestrial bolide impact record, and the first-order pattern of Phanerozoic sedimentation can together be explained by spatially heterogeneous Neoproterozoic glacial erosion totaling a global average of three to five vertical kilometers, along with the subsequent thermal and isostatic...
more | pdf
Figures
Tweets
EarthArXiv: 👊👊 More #preprint awesomeness uploaded today!! 👊👊 C. Brenhin Keller, Jon M Husson, Ross N Mitchell, William F Bottke, Thomas M Gernon, Patrick Boehnke, Elizabeth A Bell, Nicholas Swanson-Hysell & @shananpeters! U guys rooooock! Thank you! https://t.co/UREFwY09hL https://t.co/zuN4s8jy9S
Github
Repository: GreatUnconformity
User: brenhinkeller
Language: MATLAB
Stargazers: 0
Subscribers: 1
Forks: 0
Open Issues: 0
Youtube
None.
Other stats
Sample Sizes : None.
Authors: 9
Total Words: 14299
Unqiue Words: 4338

0.0 Mikeys
#8. Geomorphology and Climate Interact to Control Organic Carbon Stock and Age in Mountain River Valley Bottoms
Daniel N. Scott, Ellen Wohl
Carbon stored on the land has the potential to be released to the atmosphere and act as a greenhouse gas, influencing global climate. To predict future climate, it is imperative to understand where and how much carbon is stored across the landscape to understand how much carbon might be released to and/or sequestered from the atmosphere in the future. We quantify carbon storage in downed wood and soil in mountain river valley bottoms, finding that mountain river valley bottoms are high magnitude carbon storage zones on the landscape, and that the legacy of past glaciation, climate, and modern erosional and depositional processes regulate the age and quantity of stored OC. Our results imply that human actions can change how much carbon is stored in mountain river valley bottoms, and how it is stored there. Understanding the distribution of carbon across the landscape, especially in carbon-rich zones such as valley bottoms, requires an understanding of both the historic and modern processes shaping the landscape and vegetation.
more | pdf
Figures
Tweets
Github
None.
Youtube
None.
Other stats
Sample Sizes : None.
Authors: 2
Total Words: 7334
Unqiue Words: 2791

0.0 Mikeys
#9. A stochastic sampling approach to zircon eruption age interpretation
C. Brenhin Keller, Blair Schoene, Kyle M. Samperton
The accessory mineral zircon is widely used to constrain the timing of igneous processes such as magma crystallization or eruption. However, zircon U-Pb ages record zircon crystallization, which is not an instantaneous process. Zircon saturation calculations link zircon crystallization, temperature, and melt fraction, allowing for the estimation of zircon crystallization distributions as a function of time or temperature. Such distributions provide valuable prior information, enabling Bayesian estimates of magma eruption time and allowing for comparison of the relative accuracy of common weighted-mean and youngest-zircon age interpretations with synthetic datasets. We find that both traditional interpretations carry a risk of underestimating the uncertainty in eruption age; a low mean square of weighted deviates (MSWD) does not guarantee the accuracy of weighted mean interpretations. In the absence of independent confirmation that crystallization timescale is short relative to analytical uncertainties, a Bayesian approach...
more | pdf
Figures
Tweets
Github
None.
Youtube
None.
Other stats
Sample Sizes : None.
Authors: 3
Total Words: 7912
Unqiue Words: 2189

0.0 Mikeys
#10. Wildlife Crime: The application of forensic geoscience to assist with criminal investigations
Kris D Wisniewski, Jamie K Pringle, Daniel Allen, Gary Wilson
Wildlife crime is a growing problem in many rural areas. However, it can often be difficult to determine exactly what had happened and provide evidential Court material, especially where evidence is ephemeral. This paper presents a case study where a badger sett had been illegally filled and evidence was rapidly required to support a prosecution. A topographic surface survey was undertaken, quantifying the number and spatial position of sett entrances, as well as which had been filled by a slurry material. A ground penetrating radar survey was also undertaken to quantify how much tunnels were filled. Study results evidenced five sett tunnels were filled out of twelve observed. The slurry fill material was not being observed elsewhere on the surface. GPR survey data evidenced ~1m -5 m of slurry fill in tunnels. A subsequent report was forwarded to the CPS as evidential material. Study implications suggest the importance of rapid geoscience surveys to assist Police Forces to both gain scientific evidence for prosecutions and to...
more | pdf
Figures
Tweets
Github
None.
Youtube
None.
Other stats
Sample Sizes : None.
Authors: 4
Total Words: 4227
Unqiue Words: 1829

About

Assert is a website where the best academic papers on arXiv (computer science, math, physics), bioRxiv (biology), BITSS (reproducibility), EarthArXiv (earth science), engrXiv (engineering), LawArXiv (law), PsyArXiv (psychology), SocArXiv (social science), and SportRxiv (sport research) bubble to the top each day.

Papers are scored (in real-time) based on how verifiable they are (as determined by their Github repos) and how interesting they are (based on Twitter).

To see top papers, follow us on twitter @assertpub_ (arXiv), @assert_pub (bioRxiv), and @assertpub_dev (everything else).

To see beautiful figures extracted from papers, follow us on Instagram.

Tracking 72,893 papers.

Search
Sort results based on if they are interesting or reproducible.
Interesting
Reproducible
Feedback
Online
Stats
Tracking 72,893 papers.