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@ARTICLE{Uebel:834182,
author = {Uebel, M. and Herbst, M. and Bott, A.},
title = {{M}esoscale simulations of atmospheric {CO}2 variations
using a high-resolution model system with process-based
{CO}2 fluxes},
journal = {Quarterly journal of the Royal Meteorological Society},
volume = {143},
number = {705},
issn = {0035-9009},
address = {Weinheim [u.a.]},
publisher = {Wiley},
reportid = {FZJ-2017-04172},
pages = {1860 - 1876},
year = {2017},
abstract = {A new coupled high-resolution biosphere–atmospheremodel
(TerrSysMP-CO2) is appliedto simulate mesoscale and diurnal
variations of atmospheric CO2 mixing ratios. The modelis
characterized by process-based parametrization calculating
atmospheric dynamics andbiogenic processes considering the
prognostically varying CO2 content at the surface.
Anadvanced parametrization of soil respiration is used
distinguishing between heterotrophicand autotrophic
respiration and explicitly considering the effect of varying
soil moisture.In addition to biogenic CO2 fluxes,
high-resolution anthropogenic emissions are includedin the
simulations.The model performance is verified with
eddy-covariance fluxes and meteorologicaland CO2
concentration measurements at various heights of a tower. It
is found that acorrect representation of turbulent mixing is
most critical for a precise prediction of nearsurfaceCO2
mixing ratios and respective vertical gradients.
High-resolution simulationswere performed for a region with
complex terrain, heterogeneous land use and denselypopulated
areas. The relative influence of diverse land use, orography
as well as of synopticand mesoscale transport on the
spatio-temporal CO2 distribution is analyzed. The
resultsindicate that, in regions with hilly terrain at night
and in the morning, the CO2 patterns arestrongly influenced
by terrain-induced local circulations. Moreover, in densely
populatedregions, fossil fuel emissions are an important
source of atmospheric CO2 . Finally, thesimulated canopy
fluxes and atmospheric conditions, calculated using two
different cropphysiological parameter sets, are compared.},
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:000403437900011},
doi = {10.1002/qj.3047},
url = {https://juser.fz-juelich.de/record/834182},
}