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Stress-strain data of dry sample s04 under uniaxial compression from the Three Gorges Reservoir, China
No full textP-wave velocities of dry sample s07 during uniaxial compression from the Three Gorges Reservoir, China
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Towards the lava flow physical modelling using Olson's dynamical analogies, similarity criteria and dimensional analysis implemented for the melting polymers in SEM or ESEM sub-chambers
No full textThe "lava flow modeling" is known to be a very extensible term covering different processes from the analog experiments of the lava flow emplacement and direct digital simulations (such as 3D modeling of lava flows using smoothed particle hydrodynamics and FEM-based modeling including finite-difference numerical approximations) to SCIARA- and MAGFLOW-based cellular automata lava flow modeling and its applications for hazard predictions. Despite this fact the physical basis of all the above models includes the rheology of the underlying substance. Consequently, it is possible to simulate the effects/phenomena of lava distribution, including bifurcation-determined ones, using the unified principles, explicated from the physical chemistry and rheology of viscous polymers, including reaction-diffusion mechanisms and nonlinear wave's physics. Our study was focused on reconsideration of the analog modeling based on physical similarity conditions and criteria, which made it possible to simulate such phenomena using uniform or similar equations, which can be explicated not only for linear scales, but also for nonlinear systems and non-stationary boundary conditions. The aim of our work is physical modeling of the lava flow based on chemically different media using hydrodynamical and hydraulical similarity criteria and principles of the unified interpretation of the wave phenomena in the framework of nonlinear physics. Also we apply the scaling principles for microscopic simulation of the effects, observed on either mesoscopic or macroscopic levels, for direct observation of them at the microscopic level using complex electron microscopy instrumentation
Concentrations of sulfur compounds in section A6 of the Yangtze River Estuary in early spring (2018.3)
No full textResults of palynological analysis from 2020 of the varved MO-05 core from Lake Mondsee (Austria) section (249-526 cm)
No full textThis study reports a precisely dated pollen record with a 20-year resolution from the varved sediments of Lake Mondsee in the north-eastern European Alps (47°49′N, 13°24′E, 481 m above sea level). The analysed part of core spans the interval between 1500 BCE and 500 CE and allows changes in vegetation composition in relation to climatic changes and human activities in the catchment to be inferred. Intervals of distinct but modest human impact are identified at ca. 1450-1220, 740-490 and 340-190 BCE and from 80 BCE to 180 CE. While the first two intervals are synchronous with prominent salt mining phases during the Bronze Age and Early Iron Age at the nearby UNESCO World Heritage Site of Hallstatt, the last two intervals fall within the Late Iron Age and Roman Imperial Era, respectively. Comparison with published records of extreme runoff events obtained from the same sediment core shows that human activities (including agriculture and logging) around Lake Mondsee were low during intervals of high flood frequency as indicated by a higher number of intercalated detrital event layers, but intensified during hydrologically stable intervals. Comparison of the pollen percentages of arboreal taxa with the stable oxygen isotope and potassium ion records of the NGRIP and GISP2 ice cores from Greenland reveals significant positive correlations for Fagus and negative correlations for Betula and Alnus. This underlines the sensitivity of vegetation around Lake Mondsee to temperature fluctuations in the North Atlantic as well as to moisture fluctuations controlled by changes in the intensity of the Siberian High and the North Atlantic Oscillation (NAO) regime
Pinus edulis z-scores stack from the southern Rocky Mountains
No full textThese data are several climate sensitive piñon pine (Pinus edulis) pollen records from the Southern Rockies, USA, that aim to produce a detailed continuous record of effective precipitation and ENSO variability for the last 11,000 years. Present-day population dynamics of P. edulis woodlands in the western USA is controlled by winter minimum precipitation. A combination of La Niña-related drought and high temperatures - 'global-change-type drought' - is lethal for trees such as P. edulis. Insolation and solar output changes are suggested as the main triggers for ENSO climate and vegetation changes
