A5101795469- Plant Water Relations and Carbon Dynamics
- Urban Heat Island Mitigation
- Climate variability and models
- Hydrology and Watershed Management Studies
- Remote Sensing in Agriculture
- Climate change and permafrost
- Cryospheric studies and observations
- Remote Sensing and Land Use
- Solar Radiation and Photovoltaics
- Soil and Unsaturated Flow
- Building Energy and Comfort Optimization
- Calibration and Measurement Techniques
- Atmospheric and Environmental Gas Dynamics
- Hydrology and Drought Analysis
- Water resources management and optimization
- Soil Moisture and Remote Sensing
- Meteorological Phenomena and Simulations
- Land Use and Ecosystem Services
- Urban Green Space and Health
- Leaf Properties and Growth Measurement
- Horticultural and Viticultural Research
- Greenhouse Technology and Climate Control
- Methane Hydrates and Related Phenomena
- Remote Sensing and LiDAR Applications
- Irrigation Practices and Water Management
Centre National de la Recherche Scientifique
2008-2025
Institute of Geographic Sciences and Natural Resources Research
2007-2025
Chinese Academy of Sciences
2007-2025
Université de Strasbourg
2015-2025
Chinese Academy of Agricultural Sciences
2013-2023
Institute of Agricultural Resources and Regional Planning
2013-2023
University of Chinese Academy of Sciences
2013-2023
Ministry of Agriculture and Rural Affairs
2019-2022
Laboratoire des Sciences de l'Ingénieur, de l'Informatique et de l'Imagerie
2008-2020
Ministère de l'Agriculture et de la Souveraineté alimentaire
2018
Abstract In order to determine surface heat flux at large scale from space measurement, it is necessary introduce a bulk temperature for the whole pixel area heterogeneous and non isothermal surfaces. This should be measurable related corresponding fluxes. A possible definition of such discussed its relationship with radiation sensible fluxes given in first part this paper. temperature, referred as radiometric 〈Tsr〉, depends not only on distributions emissivity within but also channel used...
Abstract Land surface temperature (LST) is a crucial parameter that reflects land–atmosphere interaction and has thus attracted wide interest from geoscientists. Owing to the rapid development of Earth observation technologies, remotely sensed LST playing an increasingly essential role in various fields. This review aims summarize progress estimation algorithms accelerate its further applications. Thus, we briefly most‐used thermal infrared (TIR) algorithms. More importantly, this provides...
Land surface temperature (LST) retrievals obtained from NOAA Advanced Very High Resolution Radiometer (AVHRR) are of considerable importance for climatic research. However, the accurate evaluation LST space has been severely limited because difficulty in separating atmospheric effects as cannot be modeled a black-body radiator. With this goal mind, novel extension split-window technique is presented which contribution to radiance measured by satellite investigated ratioing covariance and...
Abstract Atmospheric water vapor ( wv ) is required for the accurate retrieval of land surface temperature from remote sensing data and other applications. This work aims to estimate Landsat 8 Thermal InfraRed Sensor (TIRS) images using a new modified split‐window covariance‐variance ratio (MSWCVR) method on basis brightness temperatures two thermal infrared bands. Results show that MSWCVR can theoretically retrieve with an accuracy better than 0.3 g/cm 2 dry atmosphere <2 conditions 0.5...
This study provides a comprehensive assessment of the HYDRUS-1D model for predicting root-zone soil moisture (RZSM) and evapotranspiration (ET). It evaluates different hydrodynamic parameter (SHP) schemes—soil type-based, texture-based, inverse solution—under varying cropping systems (Zea mays–Glycine max rotation continuous Zea mays) conditions (irrigated rainfed), aiming to understand water transport across cultivation patterns. Using field measurements from 2002, SHPs were optimized each...
Advanced Very High Resolution Radiometer (AVHRR) sensors provide a valuable data source for generating long-term global land surface temperature (LST). However, changes in the observation time that are caused by satellite orbit drift restrict their wide application. Here, generalized split-window (GSW) algorithm was implemented to retrieve LST from series AVHRR data. Afterwards, novel correction (ODC) algorithm, which based on diurnal cycle (DTC) model and Bayesian optimization also proposed...
Abstract Evapotranspiration (ET) is a primary mechanism for water and heat transfer between land the atmosphere. One approach to estimate ET from instantaneous remotely sensed data. The constant evaporative fraction (EF) method then usually used integrated daily fluxes, which are typically underestimated values. Here we present theoretical improvement conventional EF. improved EF shown be robust superior approach, it significantly reduces underestimation bias.
This paper aimed at the case of nonisothermal pixels and proposed a daytime temperature-independent spectral indices (TISI) method to retrieve directional emissivity effective temperature from multiangular observed images in both middle thermal infrared (MIR TIR) channels by combining kernel-driven bidirectional reflectance distribution function (BRDF) model TISI method. Four groups angular observations two MIR TIR with narrow broad bandwidths were used investigate influence bandwidth on...
Abstract As the highest mountain in southeastern Tibetan Plateau, Gongga Mountain is highly sensitive to climate change which hardly assessed with limited meteorological stations this region. To analyze warming trend of Mountain, mean annual surface temperature (MAT) was extracted based on an cycle model MODIS/Terra daily land (LST) product and used identify MAT trends from 2000 2018 using Mann‐Kendall test. The results indicate that almost all pixels passing a significance test confidence...
Daily actual evapotranspiration over the upper Chao river basin in North China on 23 June 2005 was estimated based Surface Energy Balance Algorithm for Land (SEBAL), which parameterization schemes calculating instantaneous solar radiation and daily integrated were improved by accounting variations slope azimuth of land surface terrain shadow mountainous areas. The (ET) from satellite data this study whole watershed ranges 0 mm to 7.3 day−1 with a mean 3.4 day−1, validated Penman–Monteith...
Abstract Surface evapotranspiration (ET) is one of the key components in global hydrological cycle and energy budget on Earth. This paper designs a theoretical relationship between daily instantaneous ETs with multiplication multiple fractions through mathematical derivation physics‐based Penman‐Monteith equation further develops five methods for converting remotely sensed ET to values, which equivalent conventional constant evaporative fraction (EF) method. The are then evaluated...
In this letter, the performance of newly developed drought indices, perpendicular index (PDI) and modified (MPDI), are further explored for regional surface dryness monitoring to provide clear guidance on appropriate implementation these indices over different eco‐systems through in‐depth analysis their advantages constraints. Spatio‐temporal patterns derived by MODerate Resolution Imaging Spectroradiometer (MODIS)‐based PDI MPDI compared against field‐measured soil moisture (SM), rainfall,...
Abstract Land surface soil moisture (SSM) is an important variable for hydrological, ecological, and meteorological applications. A multi‐linear model has recently been proposed to determine the SSM content from combined diurnal evolution of both land temperature (LST) net shortwave radiation (NSSR) with parameters TN (the LST mid‐morning rising rate divided by NSSR during same period) t d time daily maximum temperature). However, in addition problem that all coefficients depend on...
Abstract Evapotranspiration (ET) is an important component of the water and energy cycle. The present study develops a practical approach for generating all‐sky ET with synergistic use satellite images meteorological data. In this approach, over clear‐sky pixels estimated from two‐stage land surface temperature (LST)/fractional vegetation cover feature space method where dry/wet edges are determined theoretical calculations. For cloudy pixels, Penman‐Monteith equation used to calculate no...
Three radiative transfer equations are built for MODIS bands 29, 31, and 32, which involve six unknown parameters (average atmospheric temperature, land surface temperature (LST), three band emissivities, water vapor content). The relationships between geophysical have been analyzed in detail, indicates that neural network is one of the best methods to resolve these ill‐posed problems (LST emissivity). Retrieval analysis combined model (RM) with (NN) algorithm can be used simultaneously...
Abstract With the complex nature of land surfaces, more attention should be paid to performance remotely sensed models estimate evapotranspiration from moderate and low spatial resolution data. Taking into account characteristic a stable evaporative fraction (EF) in daytime, this paper uses surface energy balance system (SEBS) EF MODIS data for subtropical evergreen coniferous plantation southern China evaluates stability SEBS model estimating under conditions. The results show that...
Abstract Surface evapotranspiration (ET) is an important component of water and energy in land atmospheric systems. This paper investigated whether using variable surface resistances the reference ET estimates from full‐form Penman‐Monteith (PM) equation could improve upscaled daily constant evaporative fraction (EFr, ratio actual to grass/alfalfa ET) method on clear‐sky days ground‐based measurements. Half‐hourly near‐surface meteorological variables eddy covariance (EC) system‐measured...
Abstract Soil evaporation ( ET s ) and vegetation transpiration v are essential in evaporative demand analyses agricultural applications. This study estimated using two trapezoidal models, that is, the conventional model end‐member‐based soil energy partitioning (ESVEP) model, at three AmeriFlux tower sites. First, land surface temperature of a Moderate Resolution Imaging Spectroradiometer (MODIS) pixel was decomposed into temperatures T , respectively) which involve important information...
Quantification of land-surface evapotranspiration (ET) is highly significant in water resources management, climate change studies, and numerical weather prediction. The constant reference evaporative fraction method (EFr, the ratio actual to ET), which assumes that daily EFr equal at satellite overpass time, a scheme has been widely applied upscale remotely sensed instantaneous ET ET. To overcome difficulties encountered acquisition tower-based meteorological variables, this study...
Studying the effect of cloud cover on temporal upscaling instantaneous evapotranspiration (ET) is significant in effort toward a more accurate and widely applied method to obtain exact ET daily or longer time scale, thereby benefiting practical applications. In this article, authors concentrated effects different amounts for varying durations, with three commonly used approaches including constant evaporative fraction (EF) method, reference (EFr) global solar radiation (Rg) method. Transient...
Upscaling instantaneous evapotranspiration (ET), retrieved at a specific satellite overpass time, to daily scale is key issue in drought monitoring, water resource management, and climate change study. The constant global shortwave radiation ratio method, which maintains of incoming ET during the diurnal cycle, reported be robust when temporally upscaling ET. However, this temporal method typically used on clear-sky days. This study aims evaluate cloud effects for extrapolating from Moderate...
Daily evapotranspiration (ET) is of great significance among various practical applications including water management, drought monitoring, and climate change study. The ET estimations from remotely sensed models are usually instantaneous values. Various upscaling methods have been developed to extrapolate the daily scale. In these methods, accuracy estimation relies on both calculation methods. This paper used decoupling model estimate directly, according constancy coefficient (Ω) in a...