Papers by Pierre Guillevic
Global Land Product Validation Protocols: An Initiative of the CEOS Working Group on Calibration and Validation to Evaluate Satellite-derived Essential Climate Variables
AGUFM, Dec 1, 2016
NPP VIIRS Land Surface Temperature EDR validation using NOAA's observation networks
93rd American Meteorological Society Annual Meeting, Jan 10, 2013
Eco-hydrological modeling using field-based and Earth Observations to assess water use efficiency and support agricultural water resources management
Japan Geoscience Union, Mar 14, 2019
HAL (Le Centre pour la Communication Scientifique Directe), May 13, 2019
HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
Irrigation Science, Feb 8, 2019
Multiple radiation transfer models with unique clumping indices (a total of five approaches) were... more Multiple radiation transfer models with unique clumping indices (a total of five approaches) were evaluated on two Pinot Noir vineyards in Central California over 3 years. In the first approach, a basic clumping index meant for heterogeneous randomly placed clumped canopies was combined with the Campbell and Norman transfer model (C&N-H). The other four approaches, namely, the Campbell and Norman with rectangular hedgerow clumping index (C&N-R), Campbell and Norman with a geometric elliptical hedgerow model (C&N-E), the 4-stream scattering by arbitrary inclined leaves model (4SAIL) with row-crop clumping index, and the discrete anisotropic radiative transfer (DART) models, account for the unique canopy coverage distribution of the vineyard row-structured canopies. Each modeling approach varied in its complexity to predict transmitted solar radiation at ground level and the outputs were compared to solar radiation observed at the surface with an array of pyranometers. All five modeling approaches showed good agreement with the observed values [correlation coefficients (r) ranged from 0.95 to 0.97]. Model performance varied throughout the season due to their sensitivity to canopy growth. Although r values showed good agreement among all approaches, the C&N-E and DART models showed a better "goodness of fit" with lower root mean squared and bias values. Communicated by S. Ortega-Farias.
Journal of Hydrometeorology, Dec 1, 2002
The degree to which the interannual variability of vegetation phenology affects hydrological flux... more The degree to which the interannual variability of vegetation phenology affects hydrological fluxes over land is investigated through a series of simulations with the Mosaic land surface model, run both offline and coupled to the NASA Seasonal-to-Interannual Prediction Project (NSIPP) atmospheric general circulation model (GCM). Over a 9-yr period, from 1982 to 1990, interannual variations of global biophysical land surface parameters (i.e., vegetation density and greenness fraction) are derived from Normalized Difference Vegetation Index (NDVI) data collected by the Advanced Very High Resolution Radiometers (AVHRRs). First the sensitivity of evapotranspiration to interannual variations in vegetation properties is evaluated through offline simulations that ignore feedbacks between the land surface and the atmospheric models, and interannual precipitation variations. Evapotranspiration is shown to be highly sensitive to variations in vegetation over wet continental surfaces that are not densely vegetated. The sensitivity is reduced by a saturation effect over dense vegetation covers and physiological control due to environmental stress over arid and semiarid regions. Correlations between evapotranspiration and vegetation anomalies are reduced markedly in offline runs that impose interannual variations in both vegetation and precipitation. They are also strongly reduced in the coupled simulations. Although interannual variations in vegetation properties still influence transpiration and interception loss at the global scale in these runs, their impact on large-scale regional climate is much weaker, apparently because the impact is drowned out by atmospheric variability.
Inter-Comparison of In-Situ Sensors for Land Surface Temperature Measurements
AGU Fall Meeting Abstracts, Dec 19, 2014
Programmes ROSURE et HYDROVILLE
HAL (Le Centre pour la Communication Scientifique Directe), 2005
Development of an improved active fire global data set using S-NPP/VIIRS 375 and 750 m data
AGUFM, Dec 1, 2016
Development of a methodology to utilize land surface temperature satellite data for climate studies
Eco-hydrological modeling using field-based and Earth Observations to assess water use efficiency and support agricultural water resources management
AGU Fall Meeting Abstracts, Dec 1, 2018
Earth observations and models to support agricultural water resources management
AGU Fall Meeting Abstracts, Dec 1, 2019
Getting closer to Landsat: Advances from the GRAPEX Project in the Application of UAVs for High-Resolution Evapotranspiration
AGU Fall Meeting Abstracts, Dec 1, 2019
Land surface temperture and emissivit is a critical ESDR for a wide variety of studies in particu... more Land surface temperture and emissivit is a critical ESDR for a wide variety of studies in particular ecosystem and climate modeling. This poster introduces the land surface e m i s s i v i t y p r o d u c t o f t h e N A S A MEASUREs project called A Unified and Coherent Land Surface Temperature and Emissivity (LST&E) Earth System Data Record (ESDR). To develop a unified high spectral resolution emissivity database, the MODIS baseline-fit emissivity database (MODBF) produced at the University of Wisconsin-Madison and the ASTER Global Emissivity Database (ASTER GED) produced at JPL have been merged. The unified Emissivity ESDR is produced globally at 5km in mean monthly time-steps and for 13 bands from 3.6-14.3 micron and extended to 417 bands using a PC regression approach. The poster introduces this data product.
A Unified and Coherent Land Surface Temperature and Emissivity (LST&E) Earth System Data Record (ESDR) for Earth Science Research
Validation of Satellite-Derived Land Surface Temperature Products - Methods and Good Practice
Detection and Spatial Mapping of Anthropogenic Methane Plumes with the Hyperspectral Thermal Emission Spectrometer (HyTES)
Ce que je pense, Ce que je veux dire, Ce que je crois dire, Ce que je dis, Ce que vous avez envie... more Ce que je pense, Ce que je veux dire, Ce que je crois dire, Ce que je dis, Ce que vous avez envie d'entendre, Ce que vous croyez entendre, Ce que vous entendez, Ce que vous avez envie de comprendre, Ce que vous comprenez, Il y a dix possibilités qu'on ait des difficultés à communiquer. Mais essayons quand même … " Encyclopédie du savoir relatif et absolu Edmond Wells CONCLUSION RÉFÉRENCES BIBLIOGRAPHIQUES
Comparison of in-situ, aircraft, and satellite based land surface temperature measurements over a mixed agricultural region
Comparison of land surface temperature measurements at NOAA CRN sites with airborne and satellite observations
Abstract Land surface temperature (LST) is a key variable for studying global or regional land su... more Abstract Land surface temperature (LST) is a key variable for studying global or regional land surface processes and the energy and water vapor exchange at the biosphere-atmosphere interface. In an effort to better quantify the spatial variability and overall representativeness of single-point surface temperature measurement being recorded at NOAA's Climate Reference Network (CRN) sites and to improve the accuracy of satellite land surface temperature measurements, airborne flight campaigns were conducted over ...
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Papers by Pierre Guillevic