Rapid revegetation by sowing seed mixtures of shrub and herbaceous species
Solid Earth, 6, 573-581, doi:10.5194/se-6-573-2015, 2015
Syn-eruptive, soft-sediment deformation of deposits from dilute pyroclastic density current: triggers from granular shear, dynamic pore pressure, ballistic impacts and shock waves
Summary: Sedimentary beds can exhibit signs of local deformation in pyroclastic strata. Patterns are reviewed and trigger mechanisms interpreted. During an eruption, basal granular flows can have a fluidized behavior, inducing over- or underpressure at the bed interface. Basal shear can overturn strata. Large blocks ejected ballistically deform the ground when landing. Explosions at the vent produce shock waves that can destabilize a bed. These syn-eruptive triggers are specific to explosive volcanism.
Solid Earth, 6, 553-572, doi:10.5194/se-6-553-2015, 2015
Stress field sensitivity analysis in a sedimentary sequence of the Alpine foreland, northern Switzerland
Summary: A numerical model integrating the structure and mechanical properties of a sedimentary sequence in the Alpine foreland is presented to show that topography, tectonic faults and, most of all, spatialy variable rock properties affect the state of stress at depth. The tectonic forces acting on the sequence are primarily taken up by the stiff rock units leaving the weaker units in a stress shadow.
Solid Earth, 6, 533-552, doi:10.5194/se-6-533-2015, 2015
Does Jatropha curcas L. show resistance to drought in the Sahelian zone of West Africa? A case study from Burkina Faso
Solid Earth, 6, 525-531, doi:10.5194/se-6-525-2015, 2015
Evaluation of soil fertility in the succession of karst rocky desertification using principal component analysis
Solid Earth, 6, 515-524, doi:10.5194/se-6-515-2015, 2015
Fracturing of ductile anisotropic multilayers: influence of material strength
Solid Earth, 6, 497-514, doi:10.5194/se-6-497-2015, 2015
An evaluation of different measures of dynamically recrystallized grain size for paleopiezometry or paleowattometry studies
Summary: This contribution tests the various measures of grain size used in the paleopiezometry and proposes the frequency peak of the apparent 2D grain size distribution as the most robust estimator. The novelty of the approach resides in the use of the Gaussian kernel density estimator as an alternative to the classical histograms, which improves reproducibility. A free and easy-to-handle script (http://bit.ly/grainSizeTools) was developed with the aim of facilitating the adoption of this measure.
Solid Earth, 6, 475-495, doi:10.5194/se-6-475-2015, 2015
Tectonic evolution and high-pressure rock exhumation in the Qiangtang terrane, central Tibet
Summary: The early Mesozoic tectonic history of the Qiangtang terrane in central Tibet is hotly debated. We argue that the north and south Qiangtang terranes were separated by an ocean (Paleo-Tethys) until the late Triassic. Subduction was mainly to the north, underneath the north Qiangtang terrane. The high-pressure rocks were exhumed in a lithospheric-scale core complex. Together with non-metamorphic sedimentary and ophiolitic mélange, these were finally thrust on top of the south Qiangtang.
Solid Earth, 6, 457-473, doi:10.5194/se-6-457-2015, 2015
Reducing sediment concentration and soil loss using organic and inorganic amendments at plot scale
Summary: Reducing soil erosion is necessary for ecological balance in watershed scale. There are many biological and mechanical ways to control soil erosion. We compared the effects of two important amendments on soil loss in plot scale. The study amendments behaved differently under different rainfall intensities.
Solid Earth, 6, 445-455, doi:10.5194/se-6-445-2015, 2015
Livestock redistribute runoff and sediments in semi-arid rangeland areas
Solid Earth, 6, 433-443, doi:10.5194/se-6-433-2015, 2015
Litter contribution to soil organic carbon in the processes of agriculture abandon
Solid Earth, 6, 425-432, doi:10.5194/se-6-425-2015, 2015
Elemental quantification, chemistry, and source apportionment in golf course facilities in a semi-arid urban landscape using a portable X-ray fluorescence spectrometer
Summary: This study extends the application of the portable X-ray fluorescence (PXRF) spectrometry to semiarid urban landscapes. PXRF findings indicated strong positive relationships among elements and between elements and soil constituents, particularly in the non-managed areas with less anthropogenic influences. As, Cr, Fe, Mn, and Ni could be of lithogenic origin, while Cu, Pb, and Zn are due to anthropogenic influences. PXRF proves to be valuable tool for the rapid examination of elemental chemistry.
Solid Earth, 6, 415-424, doi:10.5194/se-6-415-2015, 2015
Soil aggregation, erodibility, and erosion rates in mountain soils (NW Alps, Italy)
Solid Earth, 6, 403-414, doi:10.5194/se-6-403-2015, 2015
Evaluating management-induced soil salinization in golf courses in semi-arid landscapes
Summary: Potential management-induced soil salinization in golf courses in semi-arid landscape was evaluated and salinity further examined using the portable x-ray fluorescence (PXRF) spectrometer. Soil electrical conductivity, exchangeable sodium percentage, and sodium adsorption ratio were for the most part significantly higher in the managed areas of the golf facilities. PXRF findings predicted salinity and suggested possible differences in chemical species and sources that contribute to soil salinity
Solid Earth, 6, 393-402, doi:10.5194/se-6-393-2015, 2015
Spatial variability of soil properties and soil erodibility in the Alqueva reservoir watershed
Summary: This study is on the spatial variability of soil properties and soil erodibility in the Alqueva reservoir, specifically regarding montado grassland land-use changes to more intensive and irrigated agriculture. Facing an intensification of land-use conversion will have an effect on soil erodibility and consequently increase the sedimentation into the reservoir and decrease its lifetime. Sustainable management is needed to introduce protective measures to control soil erosion.
Solid Earth, 6, 383-392, doi:10.5194/se-6-383-2015, 2015
Cr(VI) sorption/desorption on untreated and mussel-shell-treated soil materials: fractionation and effects of pH and chromium concentration
Summary: The pyritic material studied here had the highest Cr(VI) retention, whereas the lowest corresponded to granitic material. The highest Cr retention was achieved at very acid pH. The amendment with 12 t ha-1 mussel shell did not cause marked changes in Cr(VI) retention. Regarding Cr(VI) fractionation, the soluble fraction was dominant in mussel shell and in the unamended and amended granitic material, whereas more stable fractions dominated in the pyritic material and in the forest soil.
Solid Earth, 6, 373-382, doi:10.5194/se-6-373-2015, 2015
Soil physical quality changes under different management systems after 10 years in the Argentine humid pampa
Summary: Several experiments have confirmed the improvements in soil aggregation and infiltration achieved by no-tillage (NT) management associated with increases of bulk density. An increase in bulk density implies a reduction of the porosity that is in contradiction with the increased infiltration that occurs in macro and mesopores. We found that the reduction in total porosity under NT is mainly a product of a reduction of the mesopores. The results indicate NT did not affect the crop yields.
Solid Earth, 6, 361-371, doi:10.5194/se-6-361-2015, 2015
Identifying areas susceptible to desertification in the Brazilian northeast
Summary: This study is the first effort to produce a comprehensive diagnosis of the desertification processes for the entire semiarid of Brazil region and combines the existent experience from previous studies in the region with a consolidated methodology.
Solid Earth, 6, 347-360, doi:10.5194/se-6-347-2015, 2015
Adsorption, desorption and fractionation of As(V) on untreated and mussel shell-treated granitic material
Summary: The granitic material presented lower As(V) adsorption capacity than the mussel shell studied. Fine shell showed moderate As(V) retention (higher than coarse shell). The amendment of 12 and 24 t ha-1 fine shell on the granitic material increased As(V) retention. Most of the adsorbed As(V) did not desorb in a wide range of pH. The adsorbed As(V) was retained mainly on the soluble fraction, with weak bindings, also facilitating release and transfer to water, plants and the food chain.
Solid Earth, 6, 337-346, doi:10.5194/se-6-337-2015, 2015
Cobalt, chromium and nickel contents in soils and plants from a serpentinite quarry
Solid Earth, 6, 323-335, doi:10.5194/se-6-323-2015, 2015