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Now showing items 12661-12680 of 39124
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(2004)Highly oxidized titanomaghemite in oceanic basalts often carries remanent magnetization of high coercivity (stability), helping preserve the oceanic magnetic anomaly pattern. We study the source of this high coercivity in ...
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(1996)Several studies of relative paleointensity data derived from marine sediments spanning the last 4 Myr display an asymmetrical ''saw-toothed'' pattern. Polarity reversals of the geomagnetic field are associated with low ...
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SAW-TOOTHED PATTERN OF SEDIMENTARY PALEOINTENSITY RECORDS EXPLAINED BY CUMULATIVE VISCOUS REMANENCE (1996)The relative paleointensity of the earth's magnetic field from ODP Site 851 has been characterized by progressive decay towards polarity reversals, followed by sharp recovery of pre-reversal values [1]. We resampled the ...
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(1996)Recent records of normalised intensity of natural remanent magnetization (NRM) obtained from deep-sea sediments document an asymmetrical saw-tooth pattern, associated with geomagnetic reversals. This observation may reflect ...
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(2004)This study investigates spatial patterns of Ks and tests the hypothesis of whether structural variance emerges from noise with increasing sampling precision. We analyzed point measurements of Ks along independent transects ...
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(2001)This paper presents an overview and synthesis of an extensive research effort to characterize and quantify scale invariances in the morphology and evolution of braided rivers. Braided rivers were shown to exhibit anisotropic ...
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(2001)This paper presents a new statistical method for assimilating precipitation data from different sensors operating over a range of scales. The technique is based on a scale-recursive estimation algorithm which is computationally ...
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(PANGAEA, 2019-06-21)The current assessments of the carbon turnover in the Arctic tundra are subject to large uncertainties. One of the reasons is the general shortage of flux data from the vast and sparsely inhabited Arctic region. Addressing ...
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SCALING EFFECTS ON MODELED SURFACE ENERGY-BALANCE COMPONENTS USING THE NOAH-OSU LAND SURFACE MODEL (2003)As surface exchange processes are highly non-linear and heterogeneous in space and time, it is important to know the appropriate scale for the reasonable prediction of these exchange processes. For example, the explicit ...
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(1995)We propose a general approach for interpreting geochemical histograms, dividing the distributions into two classes and four subclasses (normal and multimodal distributions, and fractal and multifractal distributions). The ...
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(2002)Propagation of electromagnetic (EM) waves from an earthquake focus in the conductive Earth has been investigated using 1/1,000,000 scaling models taking earth-ionosphere and ocean-Moho plane parallel-plate waveguides into ...
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(2001)The fast Fourier transform, maximum entropy method, Lomb's method of spectral analysis and rescaled range analysis are applied to the study of extinction patterns. Using a database of marine families from mid-Permian to ...
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(2002)Soil moisture is spatially and temporally highly variable, and it influ-ences a range of environmental processes in a nonlinear manner. This leads to scale effects that need to be understood for improved prediction of ...
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(2001)The volumes and enthalpies of mixing, ΔV Mixd ΔHMixf binary solid-solution aluminosilicate garnets have been studied by computer simulation. The use of "average atoms" to simulate solid solution was found to give results ...
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(2002)A previous method proposed to measure the fractal dimension of pore spaces is adapted and modified for 2-D fracture networks. The method relies on scanning a 2-D fracture network through successive straight lines from top ...
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(1995)The results of scanning calorimetric measurements on crystalline albite, diopside, diopside-anorthite, and diopside-wollastonite-enstatite are reported in the temperature range of 1300 K to 1775 K. The results for albite ...
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(2004)Scanning electron microscopy (SEM) was used to investigate grain texture and pore structure development within various compositions of pure sI and sII gas hydrates synthesized in the laboratory, as well as in natural samples ...
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(1997)Chemical exchange between coexisting scapolite and plagioclase was studied for both a set of natural pairs from a regionally metamorphosed terrain (450-670°C, 3.5-6 kbar) in northern Idaho and for eight synthetic pairs ...
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(PANGAEA, 2011-12-02)Aim: Concepts about patterns and rates of post-glacial tree population migration are changing as a result of the increasing amount of palaeobotanical information being provided by macroscopic plant remains. Here we combine ...
Now showing items 12661-12680 of 39124