Search results for "geostationary satellite"

showing 3 items of 3 documents

A simple method to directly retrieve reference evapotranspiration from geostationary satellite images

2013

Abstract Application of FAO-56 methodology for the assessment of reference evapotranspiration, ET 0 , is challenging in areas of the world with sparse meteorological network stations. For this reason alternative procedures using remotely observed data have been proposed in the literature. In this work, a simplified version of the Makkink approach [J. Inst. Wat. Eng. 11: 277–288, 1957] was tested in a typical Mediterranean environment (Sicily, Italy). The implemented Makkink approach (MAK) uses remotely estimated solar radiation derived from Meteosat Second Generation (MSG) satellite data and in situ observations of air temperature to assess ET 0 at daily time scale. Alternatively, taking ad…

Global and Planetary ChangeMeteorologySettore ICAR/02 - Costruzioni Idrauliche E Marittime E IdrologiaElevationOrographyReference evapotranspiration MSG geostationary satellite Mediterranean environmentManagement Monitoring Policy and LawSeasonalitymedicine.diseaseRegressionGeographyApproximation errorEvapotranspirationGeostationary orbitmedicineSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliComputers in Earth SciencesScale (map)Reference evapotranspiration MSG geostationary satellite Mediterranean environmentEarth-Surface Processes
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Mapping daily evapotranspiration at field to global scales using geostationary and polar orbiting satellite imagery

2010

Abstract. Thermal infrared (TIR) remote sensing of land-surface temperature (LST) provides valuable information about the sub-surface moisture status required for estimating evapotranspiration (ET) and detecting the onset and severity of drought. While empirical indices measuring anomalies in LST and vegetation amount (e.g., as quantified by the Normalized Difference Vegetation Index; NDVI) have demonstrated utility in monitoring ET and drought conditions over large areas, they may provide ambiguous results when other factors (soil moisture, advection, air temperature) are affecting plant stress. A more physically based interpretation of LST and NDVI and their relationship to sub-surface mo…

daily evapotranspirationglobal scalegeostationary satelliteSettore ICAR/02 - Costruzioni Idrauliche E Marittime E IdrologiaSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-Forestali
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Analysis of energy fluxes estimations over Italy using time-differencing models based on thermal remote sensing data

2012

Large area estimations of land surface fluxes can be a useful operational tool for up-scaling local measurements and can serve as an upper-boundary condition for higher spatial resolution applications. Given hourly measurements of radiometric surface temperature from a geostationary satellite, it is possible to derive the partitioning of energy fluxes based on the influence of the evapotranspiration process on morning surface temperature rise. In this work, the Atmosphere-Land Exchange Inverse (ALEXI) model and the Dual Temperature Difference (DTD) approach were applied in order to relate the sensible heat flux to time-differential remote observations of surface temperature obtained from Me…

Actual evapotranspirationSettore ICAR/02 - Costruzioni Idrauliche E Marittime E IdrologiaSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliGeostationary satelliteTime-differential surface energy balanceEarth and Planetary Sciences (all)
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