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
Aggregate breakdown and surface seal development influenced by rain intensity, slope gradient and soil particle size
Summary: This paper studies the effect of slope gradient, rain intensity and soil particle size distribution on aggregate breakdown. Infiltration rate was found to increase under unsteady state conditions because of less development of surface seal. Under steady state conditions, no significant relationship was found between slope and infiltration rate.
Solid Earth, 6, 311-321, doi:10.5194/se-6-311-2015, 2015
Effects of rodent-induced land degradation on ecosystem carbon fluxes in an alpine meadow in the Qinghai–Tibet Plateau, China
Solid Earth, 6, 303-310, doi:10.5194/se-6-303-2015, 2015
Polyphase evolution of Pelagonia (northern Greece) revealed by geological and fission-track data
Summary: The eastern Mediterranean is a long-lived seismically active region where the interaction of compressive and extensive tectonics is responsible for complex crustal deformation. The Pelagonian zone in the Hellenides has witnessed such deformational processes since the Mesozoic. This study combines fission-track analysis (recording temperatures <240°C), structural and stratigraphic data that were essential to constrain the polyphase evolution of the Hellenic orogen over 100 Ma.
Solid Earth, 6, 285-302, doi:10.5194/se-6-285-2015, 2015
A 3-D shear velocity model of the southern North American and Caribbean plates from ambient noise and earthquake tomography
Summary: We compute a velocity model of the crust and uppermost mantle of southern North America, Mexico and the Caribbean. We use a recent technique based on "ambient noise" (or continuous seismic records) and a traditional one using earthquakes. Both techniques, together with the increased number of seismic stations in the region, allow us to obtain greater resolution than previous works. Some of its applications are to localize regional earthquakes and simulate ground motions.
Solid Earth, 6, 271-284, doi:10.5194/se-6-271-2015, 2015
The rheological behaviour of fracture-filling cherts: example of Barite Valley dikes, Barberton Greenstone Belt, South Africa
Summary: We investigate the composition, physical and rheological properties of fluids at the origin of Palaeoarchean chert dikes in South Africa. The dikes formed by repetitive hydraulic fracturing as overpressured oceanic fluids were released at low temperatures as a siliceous slurry. The gelation capacity of silica conferred the chert precursor a viscoelastic, probably thixotrope behaviour. It is an additional step to understand fluid circulations towards the ocean floor, the habitat of early life.
Solid Earth, 6, 253-269, doi:10.5194/se-6-253-2015, 2015
Soil microbiological properties and enzymatic activities of long-term post-fire recovery in dry and semiarid Aleppo pine (Pinus halepensis M.) forest stands
Summary: Soil properties, as well as biochemical, microbiological, and physicochemical properties of an burned Aleppo pine stand had the ability to recover 17 years after fire, showing similar values than a not-burned mature Aleppo pine stand. These properties had also recovered after 12 years of carrying out silvicultural management as thinning.
Solid Earth, 6, 243-252, doi:10.5194/se-6-243-2015, 2015
Volcanological aspects of the northwest region of Paraná continental flood basalts (Brazil)
Summary: This study describes for the first time morphological aspects of lava flows and structural characteristics caused by lava-sediment interaction in the northwestern Paraná continental flood basalts in the southeast of the South American Plate (Brazil). Early Cretaceous (134 to 132Ma) tholeiitic rocks were emplaced on a large intracratonic Paleozoic sedimentary basin (Paraná Basin), mainly covering dry eolian sandstones (Botucatu Formation).
Solid Earth, 6, 227-241, doi:10.5194/se-6-227-2015, 2015
Kinetics of potassium release in sweet potato cropped soils: a case study in the highlands of Papua New Guinea
Solid Earth, 6, 217-225, doi:10.5194/se-6-217-2015, 2015
Variations of the crustal thickness in Nepal Himalayas based on tomographic inversion of regional earthquake data
Summary: We estimate variations of the crustal thickness beneath the Nepal Himalayas based on tomographic inversion of regional earthquake data. The obtained variations of crustal thickness match fairly well with the free-air gravity anomalies and correlate with magnetic field. We propose that elevated magnetic values can be associated with more rigid segments of the incoming Indian crust which cause more compression in the thrust zone and lead to stronger crustal thickening.
Solid Earth, 6, 207-216, doi:10.5194/se-6-207-2015, 2015
Impact of the addition of different plant residues on nitrogen mineralization–immobilization turnover and carbon content of a soil incubated under laboratory conditions
Solid Earth, 6, 197-205, doi:10.5194/se-6-197-2015, 2015
Fault evolution in the Potiguar rift termination, equatorial margin of Brazil
Solid Earth, 6, 185-196, doi:10.5194/se-6-185-2015, 2015
High-precision relocation of seismic sequences above a dipping Moho: the case of the January–February 2014 seismic sequence on Cephalonia island (Greece)
Solid Earth, 6, 173-184, doi:10.5194/se-6-173-2015, 2015