Search results for "semiarid environment"

showing 5 items of 5 documents

Are remote sensing evapotranspiration models reliable across South American ecoregions?

2021

Many remote sensing-based evapotranspiration (RSBET) algorithms have been proposed in the past decades and evaluated using flux tower data, mainly over North America and Europe. Model evaluation across South America has been done locally or using only a single algorithm at a time. Here, we provide the first evaluation of multiple RSBET models, at a daily scale, across a wide variety of biomes, climate zones, and land uses in South America. We used meteorological data from 25 flux towers to force four RSBET models: Priestley–Taylor Jet Propulsion Laboratory (PT-JPL), Global Land Evaporation Amsterdam Model (GLEAM), Penman–Monteith Mu model (PM-MOD), and Penman–Monteith Nagler model (PME-VI).…

ATMOSPHERE WATER FLUXVEGETATION INDEXCalibration (statistics)Penman-MonteithBiomeRIPARIAN EVAPOTRANSPIRATIONFluxLand coverSURFACE-TEMPERATUREtranspirationSEMIARID ENVIRONMENTCARBON-DIOXIDEENERGY-BALANCE CLOSUREEvapotranspirationPenman–Monteith equationWater Science and TechnologyRemote sensingRAINFALL INTERCEPTIONLand useWACMOS-ET PROJECTEDDY COVARIANCE MEASUREMENTSMODISEarth and Environmental SciencesEnvironmental sciencePriestley-TaylorScale (map)
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Agricultural land abandonment in Mediterranean environment provides ecosystem services via soil carbon sequestration

2016

Abandonment of agricultural land leads to several consequences for ecosystem functions. Agricultural abandonment may be a significant and low cost strategy for carbon sequestration and mitigation of anthropogenic CO2 emissions due to the vegetation recovery and increase in soil organic matter. The aim of this study was to: (i) estimate the influence of different Soil Regions (areas characterized by a typical climate and parent material association) and Bioclimates (zones with homogeneous climatic regions and thermotype indices) on soil organic carbon (SOC) dynamics after agricultural land abandonment; and (ii) to analyse the efficiency of the agri-environment policy (agri-environment measur…

Environmental EngineeringSettore AGR/05 - Assestamento Forestale E SelvicolturaClimate change010501 environmental sciencesCarbon sequestration01 natural sciencesEcosystem service payment; Land use change; Semiarid environment; Soil organic carbon; Environmental Engineering; Environmental Chemistry; Waste Management and Disposal; PollutionEcosystem servicesAgricultural landEnvironmental protectionSettore AGR/01 - Economia Ed Estimo RuraleEnvironmental ChemistryEcosystemSemiarid environmentLand use changeWaste Management and Disposal0105 earth and related environmental sciencesbusiness.industrySoil organic carbonSoil organic matterEnvironmental engineering04 agricultural and veterinary sciencesSoil carbonPollutionSettore AGR/02 - Agronomia E Coltivazioni ErbaceeSettore AGR/03 - Arboricoltura Generale E Coltivazioni ArboreeAgriculture040103 agronomy & agriculture0401 agriculture forestry and fisheriesEnvironmental scienceEcosystem service paymentbusiness
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Pedogenesis and Variability in Soil Properties in a Floodplain of a Semiarid Environment in Southwestern Sicily (Italy).

2010

We performed a pedological study of the variability in soils in a floodplain area of a semiarid region in southwestern Sicily. The objectives of our research were to (i) investigate the role of parent material, erosion, and distribution processes on soil pedogenesis and horizon differentiation; (ii) evaluate the statistical distribution of soil properties; and (iii) interpret these distributions in terms of pedogenic and other processes. Our results showed that not all soil properties examined followed a normal distribution and that even when logtransformed, the degree of normality of the soil salinity data did not improve. Furthermore, principal component analysis was performed to investig…

HydrologyTopsoilgeographygeography.geographical_feature_categorySoil salinityFloodplainSoil SciencePedogenesis semiarid environments Sicily organic matter hydromorphic conditions.PedogenesisSettore AGR/14 - PedologiaSoil waterErosionAlluviumPedologyGeology
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Grassland fire effect on soil organic carbon reservoirs in a semiarid environment

2013

Abstract. The aim of this work was to investigate the effect of an experimental fire used for grassland management on soil organic carbon (SOC) stocks. The study was carried out on Hyparrhenia hirta (L.) Stapf (Hh) grassland and Ampelodesmos mauritanicus (Desf.) T. Durand & Schinz (Am) grasslands located in the north of Sicily. Soil samples were collected at 0–5 cm before and after the experimental fire, and SOC was measured. During the grassland fire, soil surface temperature was monitored. Biomass of both grasses was analysed in order to determine dry weight and its chemical composition. The results showed that SOC varied significantly with vegetation type, while it is not affecte…

Settore AGR/05 - Assestamento Forestale E SelvicolturaSoil testStratigraphySoil ScienceAmpelodesmosSoil sciencecomplex mixturesGrasslandlcsh:StratigraphyGeochemistry and PetrologyVegetation typeotorhinolaryngologic diseasesGrassland managementnatural sciencesgrassland firesoil organic carbon mediterranean environmentlcsh:QE640-699Earth-Surface ProcessesgeographyBiomass (ecology)geography.geographical_feature_categorybiologylcsh:QE1-996.5food and beveragesPaleontologyGeologySoil carbonMineralization (soil science)biology.organism_classificationSettore AGR/02 - Agronomia E Coltivazioni Erbaceelcsh:Geologysoil organic carbonsemiarid environmentGeophysicsAgronomyLitterEnvironmental scienceSolid Earth
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Source of calcium for pedogenic CaCO3 formation in benchmark soils of a Mediterranean semiarid environment

2004

Calcic and petrocalcic horizons (Bk and Bkm, respectively) commonly occur in soils of arid and semiarid regions. Studies carried out to investigate the source of calcium in CaCO3 formation have shown that dust and parent materials represent the main sources. The aim of this study was to investigate if gypsum may be a source of calcium for calcium carbonate formation and, eventually, to quantify it. Five soil pedons, developing on “Serie Gessoso- Solfifera”, were selected in a very representative forest Mediterranean ecosystem in Sicily (I). Pedons were opened, described in field and sampled according to the sequence of genetic horizons. Soil samples were analyzed to investigate 87/86Sr rati…

Settore AGR/14 - PedologiaSettore AGR/13 - Chimica Agrariapedogenic carbonates Mediterranean semiarid environment forest soils gypsum
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