Titre :
|
Seasonal dynamics of C-band backscatter of boreal forests with applications to biomass and soil moisture estimation
|
Auteurs :
|
J. Pulliainen ;
P. Mikkelä ;
M. Hallikainen ;
J. Ikonen
|
Type de document :
|
article/chapitre/communication
|
Année de publication :
|
1996
|
Format :
|
p.758-769
|
Langues:
|
= Anglais
|
Catégories :
|
SOL GEOLOGIE
TELEDETECTION
|
Mots-clés:
|
FINLANDE
;
FORET
;
BIOMASSE FORESTIERE
;
HUMIDITE DU SOL
;
COUVERT VEGETAL
;
ERS1
|
Résumé :
|
The seasonal changes of the C-band backscattering properties of boreal forests are investigated by applying 1) a semiempirical forest backscattering model and 2) multitemporal ERS-1 SAR data from two test areas in Finland. The results show that the correlation between the backscattering coefficient and forest stem volume (biomass) varies from positive to negative depending on canopy and soil moisture. A novel method for the estimation of forest stem volume (biomass) is introduced. This technique is based on the use of : 1) multitemporal ERS-1 SAR data ; 2) reference sample plot information ; 3) the semiempirical backscattering model. The results indicate that the semiempirical model can be used for predicting the soil and canopy moisture variations in ERS-1 images.
|
Source :
|
IEEE transactions on geoscience and remote sensing, vol. 34, n° 3
|