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@ARTICLE{Kandala:1022129,
author = {Kandala, Rajsekhar and Hendricks-Franssen, Harrie-Jan and
Chaudhuri, Abhijit and Sekhar, M.},
title = {{T}he value of soil temperature data versus soil moisture
data for state, parameter, and flux estimation in
unsaturated flow model},
journal = {Vadose zone journal},
volume = {23},
number = {1},
issn = {1539-1663},
address = {Hoboken, NJ},
publisher = {Wiley},
reportid = {FZJ-2024-01250},
pages = {e20298},
year = {2024},
abstract = {This synthetic study explores the value of near-surface
soil moisture and soil temperature measurements for the
estimation of soil moisture and soil temperature profiles,
soil hydraulic and thermal parameters, and latent heat and
sensible heat fluxes using data assimilation (ensemble
Kalman filter) in combination with unsaturated zone flow
modeling (HYDRUS-1D), for 12 United States Department of
Agriculture soil textures in a homogeneous and bare soil
scenario. The soil moisture profile is estimated with a root
mean square error (RMSE) of 0.04 cm3/cm3 for univariate soil
temperature assimilation and 0.01 cm3/cm3 for univariate
soil moisture assimilation. Soil temperature assimilation
performs better for soils with higher clay content compared
to soils with higher sand content. The latent and sensible
heat fluxes are estimated with smaller RMSE for univariate
soil temperature assimilation compared to univariate soil
moisture assimilation for 8 out of 12 soil types. As the
climate condition changes from hot semi-arid to sub-humid
climate, the soil moisture assimilation performs better for
high permeable soil but worse for low permeable soil. In
summary, the findings suggest that for most soil texture
classes, assimilating soil temperature in vadose zone models
is skillful to improve latent heat flux, soil moisture
profile, and soil hydraulic parameters. Joint assimilation
with soil moisture can further enhance the accuracy of the
model outputs for all range of soil texture and climate
conditions.},
cin = {IBG-3},
ddc = {550},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {2173 - Agro-biogeosystems: controls, feedbacks and impact
(POF4-217)},
pid = {G:(DE-HGF)POF4-2173},
typ = {PUB:(DE-HGF)16},
UT = {WOS:001121398100001},
doi = {10.1002/vzj2.20298},
url = {https://juser.fz-juelich.de/record/1022129},
}