A5054048909- Plant Water Relations and Carbon Dynamics
- Hydrology and Watershed Management Studies
- Tree-ring climate responses
- Soil and Unsaturated Flow
- Soil erosion and sediment transport
- Urban Heat Island Mitigation
- Irrigation Practices and Water Management
- Atmospheric and Environmental Gas Dynamics
- Mediterranean and Iberian flora and fauna
- Climate variability and models
- Forest ecology and management
- Horticultural and Viticultural Research
- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Biocrusts and Microbial Ecology
- Meteorological Phenomena and Simulations
- Peatlands and Wetlands Ecology
- Greenhouse Technology and Climate Control
- Environmental and Ecological Studies
- Groundwater flow and contamination studies
- Hydrology and Drought Analysis
- Plant responses to elevated CO2
- Karst Systems and Hydrogeology
- Chemical and Environmental Engineering Research
- Remote Sensing in Agriculture
Universidad Pablo de Olavide
2007-2023
Consejo Superior de Investigaciones Científicas
1999-2001
Estacion Experimental de Zonas Aridas
1999-2001
Abstract Dewfall is widely recognized as an important source of water for many ecosystems, especially in arid and semiarid areas, contributing to improve daily annual balances leading increased interest its study recent years. In this study, occurrence, frequency amount dewfall were measured from January 2007 December 2010 (4 years study) find out contribution the local balance a Mediterranean steppe ecosystem dominated by scattered tussocks Stipa tenacissima (Balsa Blanca, Almería, SE...
[1] An adaptation of a simple model for evapotranspiration (E) estimations in drylands based on remotely sensed leaf area index and the Penman-Monteith equation (PML model) (Leuning et al., 2008) is presented. Three methods improving consideration soil evaporation influence total estimates these ecosystems are proposed. The original PML considered as constant fraction (f) equilibrium evaporation. We propose an that considers f variable primarily related to water availability. In order...
This study presents the interannual CO 2 exchange of a semiarid shrubland overlying carbonaceous substrate where abiotic processes may interact with biological in ecosystem carbon cycle. Estimated by eddy covariance technique and two different gap‐filling models (RBF neural network MDS “Marginal Distribution Sampling”), mean annual net (NEE) varied from −63 to 29 g C m −2 , averaging ± 23 May 2004 December 2007. In addition, was divided into periods likely dominated clear signals activity...
Abstract Data for water vapor adsorption and evaporation are presented a bare soil (sandy loam, clay content 15%) in southern Spanish olive grove. Water losses gains were measured using eight high-precision minilysimeters, placed around an tree, which had been irrigated until the reached field capacity (∼0.22 m3 m−3). They subsequently left to dry 10 days. A pair of lysimeters was situated at each main points compass (N, E, S, W), distance 1 m (the inner set lysimeters; ILS) 2 outer OLS),...
ABSTRACT The accurate quantification of the energy available for sensible and latent heat transfer from plant canopies is essential prediction impacts climate on vegetation water use growth. Unlike agricultural fields extensive forests more humid zones, growing in semi‐arid climates usually sparse creating a heterogeneous surface shrubs, annuals bare soil. Under these conditions many assumptions basic equations used microclimatology, which assume uniform vegetated surface, may be violated....
Carbon and water fluxes in a semiarid shrubland ecosystem located the southeast of Spain (province Almería) were measured continuously over one year using eddy covariance technique. We examined influence environmental variables on daytime (photosynthetically active photons, F P >10 µmol m-2 s-1) gas exchange tested ability an empirical eco-physiological model based to estimate carbon whole year. The showed strong seasonality. During two solstitial periods, summer with warm temperatures (>15...
Abstract The need for a better understanding of factors controlling the variability soil water content (θ) in space and time to adequately predict movement interphase soil-atmosphere is widely recognised. In this paper, we analyse how properties, surface cover topography influence moisture over karstic lithology sub-humid Mediterranean mountain environment. For analysis have used 17 months θ measurements with high temporal resolution from different positions on hillslope at main recharge...
Three operative models with minimum input data requirements for estimatingthe partition of available surface energy into sensible and latent heat flux using ASTERdata have been evaluated in a semiarid area SE Spain. The non-evaporative fraction(NEF) is proposed as an indicator the water deficit. best results wereachieved NEF estimated “Simplified relationship” unstable conditions(NEFSeguin) S-SEBI (Simplified Surface Energy Balance Index) modelcorrected atmospheric conditions (NEFS-SEBIt,)...
Abstract This paper analyses the temporal dynamics of soil water balance components in a representative recharge area Sierra de Gádor (Almeria, southeastern Spain) two hydrological years. Two approaches are used to estimate daily potential (PR): Approach 1 based on deriving PR from as difference between measurements rainfall (P) and actual evapotranspiration (E) obtained by eddy covariance; 2 with dynamic pattern moisture (θ) recorded at depths site's thin (average 0.35 m thickess). For year...
Abstract. Measurements of CO2 fluxes with Eddy Covariance (EC) systems are ongoing over different ecosystems around the world, through measuring networks, in order to assess carbon balance these ecosystems. In carbonate ecosystems, characterized by presence subterranean pores and cavities, ventilation accumulated cavities can act as an extra source exchange between ecosystem atmosphere. this work we analyse effect heterogeneity a on measurements comparing from two EC distinct footprints....