Paper Info
Title
Estimation of evapotranspiration over heterogeneous surface based on HJ-1B satellite
Abstract
Evapotranspiration plays an important role in the surface-atmosphere interaction. Remote sensing has long been identified as a technology capable of monitoring ET. But spatial scale problem has a great effect on the accuracy of the ET retrieval by satellite. The objective of this paper is to reduce the uncertainty produced by spatial scale problem based on the spatial characteristic of HJ-1B data. Firstly, the temperature is sharpened to 30m spatial resolutions associated with visible-near-infrared bands. Then net radiation, soil heat flux and sensible heat flux of sub pixel are calculated at 30m resolution using one-source energy balance model. Finally, the fluxes are averaged to 300m resolution and latent heat flux is computed as residual of surface energy balance. The result shows that Temperature sharpening and flux aggregation (TSFA) method reduces the uncertainty produced by spatial scale problem, and it can capture the land surface heterogeneities and associated uncertainties in a way.
Year
DOI
Venue
2014
10.1109/IGARSS.2014.6946871
IGARSS
Keywords
Field
DocType
sensible heat flux,remote sensing,one-source energy balance model,transpiration,spatial scale problem,surface energy balance,spatial scale,evapotranspiration,spatial resolutions,surface-atmosphere interaction,soil heat flux,evaporation,associated uncertainties,heterogeneous surface,net radiation,et retrieval,hj-1b satellite,temperature sharpening-and-flux aggregation method,visible-near-infrared bands,evapotranspiration estimation,land surface heterogeneities,spatial resolution,satellites,heating
Residual,Heat flux,Latent heat,Computer science,Remote sensing,Sensible heat,Energy balance,Flux,Spatial ecology,Evapotranspiration
Conference
ISSN
Citations 
PageRank 
2153-6996
0
0.34
References 
Authors
0
6
Name
Order
Citations
PageRank
Jingjun Jiao120.75
Xiaozhou Xin200.34
Jing Zhao300.68
Li Li400.68
Ti Zhou500.34
Zhiqing Peng631.10