An integrated algorithm for estimating regional latent heat flux and daily evapotranspiration
نویسندگان
چکیده
Y. ZHANG*{{, C. LIU{, Y. LEI{, Y. TANG{, Q. YU§, Y. SHEN{ and H. SUN{ {Shijiazhuang Institute of Agricultural Modernization, CAS, 286 Huaizhong Rd, Shijiazhuang, 050021, P.R. China {Environmental Biology Division, National Institute for Environmental Studies, Onogawa 16-2, Tsukuba 305-8506, Japan §Luancheng Agro-ecosystem Station, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, No Jia 11, Datun Road, Anwai, Beijing 100101, P.R. China
منابع مشابه
On the Use of the Eddy Covariance Latent Heat Flux and Sap Flow Transpiration for the Validation of a Surface Energy Balance Model
Actual evapotranspiration is assessed via surface energy balance at an hourly rate. However, a robust estimation of daily evapotranspiration from hourly values is required. Outcomes of surface energy balance are frequently determined via measures of eddy covariance latent heat flux. Surface energy balance can be applied on images acquired at different times and spatial resolutions. In addition,...
متن کاملA MODIS-Based Energy Balance to Estimate Evapotranspiration for Clear-Sky Days in Brazilian Tropical Savannas
Evapotranspiration (ET) plays an important role in global climate dynamics and in primary production of terrestrial ecosystems; it represents the mass and energy transfer from the land to atmosphere. Limitations to measuring ET at large scales using ground-based methods have motivated the development of satellite remote sensing techniques. The purpose of this work is to evaluate the accuracy of...
متن کاملThe Sensitivity of Latent Heat Flux to Changes in the Radiative Forcing: A Framework for Comparing Models and Observations
A climate model must include an accurate surface physics scheme in order to examine the interactions between the land and atmosphere. Given an increase in the surface radiative forcing, the sensitivity of latent heat flux to available energy plays an important role in determining the energy budget and has a significant impact on the response of surface temperature. The Penman–Monteith equation ...
متن کاملProposal of the Regional Complementary Model for Estimating Actual Evapotranspiration Using Remotely Sensed Data
Brutsaert (1979, 1982) suggested a method for the complementary model taking atmospheric stability into account on the basis of the Monin-Obukhov similarity theory. Katul and Parlange (1992a, 1992b) and the authors (1993) independent ly published the papers on the estimation of latent and sensible heat fluxes including the effects of the atmospheric stabil ity. Parlange and Katul (1992c) actual...
متن کاملA comparison of operational remote sensing-based models for estimating crop evapotranspiration
The integration of remotely sensed data intomodels of evapotranspiration (ET) facilitates the estimation of water consumption across agricultural regions. To estimate regional ET, two basic types of remote sensing approaches have been successfully applied. The first approach computes a surface energy balance using the radiometric surface temperature for estimating the sensible heat flux (H), an...
متن کامل