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@ARTICLE{Han:872729,
author = {Han, Cunbo and Brdar, Slavko and Kollet, Stefan},
title = {{R}esponse of {C}onvective {B}oundary {L}ayer and {S}hallow
{C}umulus to {S}oil {M}oisture {H}eterogeneity: {A}
{L}arge‐{E}ddy {S}imulation {S}tudy},
journal = {Journal of advances in modeling earth systems},
volume = {11},
number = {12},
issn = {1942-2466},
address = {Fort Collins, Colo.},
reportid = {FZJ-2020-00207},
pages = {4305-4322},
year = {2019},
abstract = {In this study, the impact of varying soil moisture
heterogeneity (spatial variance and structure) on the
development of the convective boundary layer and shallow
cumulus clouds was investigated. Applying soil moisture
heterogeneity generated via spatially correlated Gaussian
random fields based on a power law model and idealized
atmospheric vertical profiles as initial conditions, three
sets of large‐eddy simulations provide insight in the
influence of soil moisture heterogeneity on the ensuing
growth of the convective boundary layer and development of
shallow cumulus clouds. A sensitivity on the strong, weak,
and unstructured soil moisture heterogeneity is
investigated. The simulation results show that
domain‐averaged land surface sensible heat and latent heat
flux change strongly with changing soil moisture variance
because of the interactions between surface heterogeneity
and induced circulations, while domain means of soil
moisture are identical. Vertical profiles of boundary layer
characteristics are strongly influenced by the surface
energy partitioning and induced circulations, especially the
profiles of liquid water and liquid water flux. The amount
of liquid water and liquid water flux increases with
increasing structure. In addition, the liquid water path is
higher in case of strongly‐structured heterogeneity
because more available energy is partitioned into latent
heat and more intensive updrafts exist. Interestingly, the
increase of liquid water path with increasing soil moisture
variance only occurs in the strongly structured cases, which
suggests that soil moisture variance and structure work
conjunctively in the surface energy partitioning and the
cloud formation.},
cin = {IBG-3},
ddc = {550},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {255 - Terrestrial Systems: From Observation to Prediction
(POF3-255)},
pid = {G:(DE-HGF)POF3-255},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000502179000001},
doi = {10.1029/2019MS001772},
url = {https://juser.fz-juelich.de/record/872729},
}