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@comment{{This file has been generated by bib2bib 1.95}}
@comment{{Command line: /usr/bin/bib2bib --quiet -c 'not journal:"Discussions"' -c 'not journal:"Polymer Science"' -c '  author:"Cheruy"  ' -c year=2013 -c $type="ARTICLE" -oc lmd_Cheruy2013.txt -ob lmd_Cheruy2013.bib /home/WWW/LMD/public/}}
  author = {{Dufresne}, J.-L. and {Foujols}, M.-A. and {Denvil}, S. and 
	{Caubel}, A. and {Marti}, O. and {Aumont}, O. and {Balkanski}, Y. and 
	{Bekki}, S. and {Bellenger}, H. and {Benshila}, R. and {Bony}, S. and 
	{Bopp}, L. and {Braconnot}, P. and {Brockmann}, P. and {Cadule}, P. and 
	{Cheruy}, F. and {Codron}, F. and {Cozic}, A. and {Cugnet}, D. and 
	{de Noblet}, N. and {Duvel}, J.-P. and {Ethé}, C. and {Fairhead}, L. and 
	{Fichefet}, T. and {Flavoni}, S. and {Friedlingstein}, P. and 
	{Grandpeix}, J.-Y. and {Guez}, L. and {Guilyardi}, E. and {Hauglustaine}, D. and 
	{Hourdin}, F. and {Idelkadi}, A. and {Ghattas}, J. and {Joussaume}, S. and 
	{Kageyama}, M. and {Krinner}, G. and {Labetoulle}, S. and {Lahellec}, A. and 
	{Lefebvre}, M.-P. and {Lefevre}, F. and {Levy}, C. and {Li}, Z.~X. and 
	{Lloyd}, J. and {Lott}, F. and {Madec}, G. and {Mancip}, M. and 
	{Marchand}, M. and {Masson}, S. and {Meurdesoif}, Y. and {Mignot}, J. and 
	{Musat}, I. and {Parouty}, S. and {Polcher}, J. and {Rio}, C. and 
	{Schulz}, M. and {Swingedouw}, D. and {Szopa}, S. and {Talandier}, C. and 
	{Terray}, P. and {Viovy}, N. and {Vuichard}, N.},
  title = {{Climate change projections using the IPSL-CM5 Earth System Model: from CMIP3 to CMIP5}},
  journal = {Climate Dynamics},
  keywords = {Climate, Climate change, Climate projections, Earth System Model, CMIP5, CMIP3, Greenhouse gases, Aerosols, Carbon cycle, Allowable emissions, RCP scenarios, Land use changes},
  year = 2013,
  month = may,
  volume = 40,
  pages = {2123-2165},
  abstract = {{We present the global general circulation model IPSL-CM5 developed to
study the long-term response of the climate system to natural and
anthropogenic forcings as part of the 5th Phase of the Coupled Model
Intercomparison Project (CMIP5). This model includes an interactive
carbon cycle, a representation of tropospheric and stratospheric
chemistry, and a comprehensive representation of aerosols. As it
represents the principal dynamical, physical, and bio-geochemical
processes relevant to the climate system, it may be referred to as an
Earth System Model. However, the IPSL-CM5 model may be used in a
multitude of configurations associated with different boundary
conditions and with a range of complexities in terms of processes and
interactions. This paper presents an overview of the different model
components and explains how they were coupled and used to simulate
historical climate changes over the past 150 years and different
scenarios of future climate change. A single version of the IPSL-CM5
model (IPSL-CM5A-LR) was used to provide climate projections associated
with different socio-economic scenarios, including the different
Representative Concentration Pathways considered by CMIP5 and several
scenarios from the Special Report on Emission Scenarios considered by
CMIP3. Results suggest that the magnitude of global warming projections
primarily depends on the socio-economic scenario considered, that there
is potential for an aggressive mitigation policy to limit global warming
to about two degrees, and that the behavior of some components of the
climate system such as the Arctic sea ice and the Atlantic Meridional
Overturning Circulation may change drastically by the end of the
twenty-first century in the case of a no climate policy scenario.
Although the magnitude of regional temperature and precipitation changes
depends fairly linearly on the magnitude of the projected global warming
(and thus on the scenario considered), the geographical pattern of these
changes is strikingly similar for the different scenarios. The
representation of atmospheric physical processes in the model is shown
to strongly influence the simulated climate variability and both the
magnitude and pattern of the projected climate changes.
  doi = {10.1007/s00382-012-1636-1},
  adsurl = {},
  adsnote = {Provided by the SAO/NASA Astrophysics Data System}
  author = {{Hourdin}, F. and {Grandpeix}, J.-Y. and {Rio}, C. and {Bony}, S. and 
	{Jam}, A. and {Cheruy}, F. and {Rochetin}, N. and {Fairhead}, L. and 
	{Idelkadi}, A. and {Musat}, I. and {Dufresne}, J.-L. and {Lahellec}, A. and 
	{Lefebvre}, M.-P. and {Roehrig}, R.},
  title = {{LMDZ5B: the atmospheric component of the IPSL climate model with revisited parameterizations for clouds and convection}},
  journal = {Climate Dynamics},
  keywords = {Climate modeling, Physical parameterizations, Shallow convection, Deep convection, Climate change projections},
  year = 2013,
  month = may,
  volume = 40,
  pages = {2193-2222},
  abstract = {{Based on a decade of research on cloud processes, a new version of the
LMDZ atmospheric general circulation model has been developed that
corresponds to a complete recasting of the parameterization of
turbulence, convection and clouds. This LMDZ5B version includes a
mass-flux representation of the thermal plumes or rolls of the
convective boundary layer, coupled to a bi-Gaussian statistical cloud
scheme, as well as a parameterization of the cold pools generated below
cumulonimbus by re-evaporation of convective precipitation. The
triggering and closure of deep convection are now controlled by lifting
processes in the sub-cloud layer. An available lifting energy and
lifting power are provided both by the thermal plumes and by the spread
of cold pools. The individual parameterizations were carefully validated
against the results of explicit high resolution simulations. Here we
present the work done to go from those new concepts and developments to
a full 3D atmospheric model, used in particular for climate change
projections with the IPSL-CM5B coupled model. Based on a series of
sensitivity experiments, we document the differences with the previous
LMDZ5A version distinguishing the role of parameterization changes from
that of model tuning. Improvements found previously in single-column
simulations of case studies are confirmed in the 3D model: (1) the
convective boundary layer and cumulus clouds are better represented and
(2) the diurnal cycle of convective rainfall over continents is delayed
by several hours, solving a longstanding problem in climate modeling.
The variability of tropical rainfall is also larger in LMDZ5B at
intraseasonal time-scales. Significant biases of the LMDZ5A model
however remain, or are even sometimes amplified. The paper emphasizes
the importance of parameterization improvements and model tuning in the
frame of climate change studies as well as the new paradigm that
represents the improvement of 3D climate models under the control of
single-column case studies simulations.
  doi = {10.1007/s00382-012-1343-y},
  adsurl = {},
  adsnote = {Provided by the SAO/NASA Astrophysics Data System}
  author = {{Campoy}, A. and {Ducharne}, A. and {Cheruy}, F. and {Hourdin}, F. and 
	{Polcher}, J. and {Dupont}, J.~C.},
  title = {{Response of land surface fluxes and precipitation to different soil bottom hydrological conditions in a general circulation model}},
  journal = {Journal of Geophysical Research (Atmospheres)},
  keywords = {land surface model, climate model, groundwater, soil-precipitation feedback Europe},
  year = 2013,
  month = oct,
  volume = 118,
  number = d17,
  pages = {10725},
  abstract = {{Very different approaches exist in land surface models (LSMs) to
describe the water fluxes at the soil bottom, from free drainage to zero
flux, and even upward fluxes if the soil is coupled to a water table. To
explore the influence of these conditions on the water cycle in a
unified framework, we introduce new boundary conditions in the ORCHIDEE
LSM, which is coupled to the atmospheric general circulation model LMDZ.
We use a zoomed and nudged configuration centered over France to
reproduce the observed regional weather. Soil moisture and
evapotranspiration increase ranging from free drainage to impermeable
bottom, then by prescribing saturation closer and closer to the surface.
The corresponding response patterns can be related to both climate
regimes and soil texture. When confronted to observations from the SIRTA
observatory 25 km south of Paris, which exhibits a shallow water table,
the best simulations are the ones with prescribed saturation. The local
precipitation, however, is only increased if the new bottom boundary
conditions are applied globally. The magnitude of this increase depends
on the evaporation and on the relative weight of local versus remote
sources of moisture for precipitation between Western and Eastern
Europe. This suggests that the summer warm/dry bias of many climate
models in this region might be alleviated by including a sufficiently
realistic ground water description.
  doi = {10.1002/jgrd.50627},
  adsurl = {},
  adsnote = {Provided by the SAO/NASA Astrophysics Data System}
  author = {{Seneviratne}, S.~I. and {Wilhelm}, M. and {Stanelle}, T. and 
	{Hurk}, B. and {Hagemann}, S. and {Berg}, A. and {Cheruy}, F. and 
	{Higgins}, M.~E. and {Meier}, A. and {Brovkin}, V. and {Claussen}, M. and 
	{Ducharne}, A. and {Dufresne}, J.-L. and {Findell}, K.~L. and 
	{Ghattas}, J. and {Lawrence}, D.~M. and {Malyshev}, S. and {Rummukainen}, M. and 
	{Smith}, B.},
  title = {{Impact of soil moisture-climate feedbacks on CMIP5 projections: First results from the GLACE-CMIP5 experiment}},
  journal = {\grl},
  keywords = {CMIP5, soil moisture, feedbacks, climate extremes, land-atmosphere interactions, projections},
  year = 2013,
  month = oct,
  volume = 40,
  pages = {5212-5217},
  abstract = {{Global Land-Atmosphere Climate Experiment-Coupled Model Intercomparison
Project phase 5 (GLACE-CMIP5) is a multimodel experiment investigating
the impact of soil moisture-climate feedbacks in CMIP5 projections. We
present here first GLACE-CMIP5 results based on five Earth System
Models, focusing on impacts of projected changes in regional soil
moisture dryness (mostly increases) on late 21st century climate.
Projected soil moisture changes substantially impact climate in several
regions in both boreal and austral summer. Strong and consistent effects
are found on temperature, especially for extremes (about 1-1.5 K for
mean temperature and 2-2.5 K for extreme daytime temperature). In the
Northern Hemisphere, effects on mean and heavy precipitation are also
found in most models, but the results are less consistent than for
temperature. A direct scaling between soil moisture-induced changes in
evaporative cooling and resulting changes in temperature mean and
extremes is found in the simulations. In the Mediterranean region, the
projected soil moisture changes affect about 25\% of the projected
changes in extreme temperature.
  doi = {10.1002/grl.50956},
  adsurl = {},
  adsnote = {Provided by the SAO/NASA Astrophysics Data System}
  author = {{Cheruy}, F. and {Campoy}, A. and {Dupont}, J.-C. and {Ducharne}, A. and 
	{Hourdin}, F. and {Haeffelin}, M. and {Chiriaco}, M. and {Idelkadi}, A.
  title = {{Combined influence of atmospheric physics and soil hydrology on the simulated meteorology at the SIRTA atmospheric observatory}},
  journal = {Climate Dynamics},
  keywords = {Climate model, Boundary layer parametrization, Evaluation, Land surface, Instrumented site, Land-atmosphere interactions},
  year = 2013,
  month = may,
  volume = 40,
  pages = {2251-2269},
  abstract = {{The identification of the land-atmosphere interactions as one of the key
source of uncertainty in climate models calls for process-level
assessment of the coupled atmosphere/land continental surface system in
numerical climate models. To this end, we propose a novel approach and
apply it to evaluate the standard and new parametrizations of boundary
layer/convection/clouds in the Earth System Model (ESM) of Institut
Pierre Simon Laplace (IPSL), which differentiate the IPSL-CM5A and
IPSL-CM5B climate change simulations produced for the Coupled Model
Inter-comparison Project phase 5 exercise. Two different land surface
hydrology parametrizations are also considered to analyze different
land-atmosphere interactions. Ten-year simulations of the coupled land
surface/atmospheric ESM modules are confronted to observations collected
at the SIRTA (Site Instrumental de Recherche par
Télédection Atmosphérique), located near Paris
(France). For sounder evaluation of the physical parametrizations, the
grid of the model is stretched and refined in the vicinity of the SIRTA,
and the large scale component of the modeled circulation is adjusted
toward ERA-Interim reanalysis outside of the zoomed area. This allows us
to detect situations where the parametrizations do not perform
satisfactorily and can affect climate simulations at the
regional/continental scale, including in full 3D coupled runs. In
particular, we show how the biases in near surface state variables
simulated by the ESM are explained by (1) the sensible/latent heat
partitionning at the surface, (2) the low level cloudiness and its
radiative impact at the surface, (3) the parametrization of turbulent
transport in the surface layer, (4) the complex interplay between these
processes. We also show how the new set of parametrizations can improve
these biases.
  doi = {10.1007/s00382-012-1469-y},
  adsurl = {},
  adsnote = {Provided by the SAO/NASA Astrophysics Data System}
Contact information

EMC3 group

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Tour 45-55, 3ème étage
4 Place Jussieu
75252 Paris Cedex 05
Tel: 33 + 1 44 27 27 99
      33 + 6 16 27 34 18 (Dr F. Cheruy)
Tel: 33 + 1 44 27 35 25 (Secretary)
Fax: 33 + 1 44 27 62 72
email: emc3 at

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