TY  - STD
AU  - Leduc-Leballeur Marion, Picard Ghislain
PY  - 2015//
TI  - Modeling L-Band Brightness Temperature at Dome C in Antarctica and Comparison With SMOS Observations
BT  - IEEE Transactions on Geoscience and Remote Sensing
SP  - 4022
EP  - 4032
VL  - 53
IS  - 7
KW  - Antarctica
KW  - Brightness temperature
KW  - Dome C
KW  - Ice
KW  - L-band
KW  - L-band brightness temperature
KW  - L-band characteristics
KW  - Microwave
KW  - SMOS observations
KW  - Scattering
KW  - Snow
KW  - Temperature measurement
KW  - brightness suggest snowpack
KW  - emission e-folding depth
KW  - hydrological techniques
KW  - incidence angles
KW  - ocean waves
KW  - radiative transfer
KW  - radiative transfer (RT) theory
KW  - radiative transfer theory
KW  - remote sensing
KW  - seasonal variations
KW  - snow emission stability
KW  - snow properties
KW  - snowpack variability density
KW  - soil
KW  - soil moisture ocean salinity satellite observation
KW  - wave approach
KW  - wave theory
KW  -
N2  - Two electromagnetic models were used to simulate snow emission at L-band from in situ measurements of snow properties collected at Dome C in Antarctica. Two different approaches were used: one based on the radiative transfer theory and the other on the wave approach. The soil moisture ocean salinity (SMOS) satellite observations performed at 1.4 GHz (21 cm) were used to check the validity of these models. Model results based on the wave approach were in good agreement with SMOS observations, particularly for incidence angles lower than 55°. Comparisons suggest that the wave approach is more suitable to simulate brightness temperature at L-band than the transfer radiative theory, because interference between the layers of the snowpack is better taken into account. The model based on the wave approach was then used to investigate several L-band characteristics at Dome C. The emission e-folding depth, i.e., 67% of the signal, was estimated at 250 m, and 99% of the signal emanated from the top 900 m. L-band brightness temperature is only slightly affected by seasonal variations in surface temperature, confirming the high temporal stability of snow emission at low frequency. Sensitivity tests showed that good knowledge of density variability in the snowpack is essential for accurate simulations in L-band.
SN  - 0196-2892
UR  - http://dx.doi.org/10.1109/TGRS.2015.2388790
N1  - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=6127), last updated on Tue, 30 Nov 1999 00:00:00 +0100
ID  - Leduc-LeballeurMarion2015
ER  -