lmd_Dufresne2014.bib
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@article{2014GeoRL..41.6493C,
author = {{Cheruy}, F. and {Dufresne}, J.~L. and {Hourdin}, F. and {Ducharne}, A.
},
title = {{Role of clouds and land-atmosphere coupling in midlatitude continental summer warm biases and climate change amplification in CMIP5 simulations}},
journal = {\grl},
keywords = {model biases, land-atmosphere coupling, CMIP5, climate change},
year = 2014,
month = sep,
volume = 41,
pages = {6493-6500},
abstract = {{Over land, most state-of-the-art climate models contributing to Coupled
Model Intercomparison Project Phase 5 (CMIP5) share a strong summertime
warm bias in midlatitude areas, especially in regions where the coupling
between soil moisture and atmosphere is effective. The most biased
models overestimate solar incoming radiation, because of cloud deficit
and have difficulty to sustain evaporation. These deficiencies are also
involved in the spread of the summer temperature projections among
models in the midlatitude; the models which simulate a
higher-than-average warming overestimate the present climate net
shortwave radiation which increases more-than-average in the future, in
link with a decrease of cloudiness. They also show a higher-than-average
reduction of evaporative fraction in areas with soil moisture-limited
evaporation regimes. Over these areas, the most biased models in the
present climate simulate a larger warming in response to climate change
which is likely to be overestimated.
}},
doi = {10.1002/2014GL061145},
adsurl = {http://adsabs.harvard.edu/abs/2014GeoRL..41.6493C},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
@article{2014JCli...27.6960R,
author = {{Rotstayn}, L.~D. and {Plymin}, E.~L. and {Collier}, M.~A. and
{Boucher}, O. and {Dufresne}, J.-L. and {Luo}, J.-J. and {von Salzen}, K. and
{Jeffrey}, S.~J. and {Foujols}, M.-A. and {Ming}, Y. and {Horowitz}, L.~W.
},
title = {{Declining Aerosols in CMIP5 Projections: Effects on Atmospheric Temperature Structure and Midlatitude Jets}},
journal = {Journal of Climate},
year = 2014,
month = sep,
volume = 27,
pages = {6960-6977},
doi = {10.1175/JCLI-D-14-00258.1},
adsurl = {http://adsabs.harvard.edu/abs/2014JCli...27.6960R},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
@article{2014GeoRL..41.4308V,
author = {{Voigt}, A. and {Bony}, S. and {Dufresne}, J.-L. and {Stevens}, B.
},
title = {{The radiative impact of clouds on the shift of the Intertropical Convergence Zone}},
journal = {\grl},
keywords = {clouds, radiation, ITCZ, circulation changes},
year = 2014,
month = jun,
volume = 41,
pages = {4308-4315},
abstract = {{Whereas it is well established that clouds are important to changes in
Earth's surface temperature, their impact on changes of the large-scale
atmospheric circulation is less well understood. Here we study the
radiative impact of clouds on the shift of the Intertropical Convergence
Zone (ITCZ) in response to hemispheric surface albedo forcings. The
problem is approached using aquaplanet simulations with four
comprehensive atmosphere models. The radiative impact of clouds on the
ITCZ shift differs in sign and magnitude across models and is
responsible for half of the model spread in the ITCZ shift. The model
spread is dominated by tropical clouds whose radiative impact is linked
to the dependence of their cloud radiative properties on the
circulation. The simulations not only demonstrate the importance of
clouds for circulation changes but also propose a way to reduce the
model uncertainty in ITCZ shifts.
}},
doi = {10.1002/2014GL060354},
adsurl = {http://adsabs.harvard.edu/abs/2014GeoRL..41.4308V},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
@article{2014Natur.505...37S,
author = {{Sherwood}, S.~C. and {Bony}, S. and {Dufresne}, J.-L.},
title = {{Spread in model climate sensitivity traced to atmospheric convective mixing}},
journal = {\nat},
year = 2014,
month = jan,
volume = 505,
pages = {37-42},
abstract = {{Equilibrium climate sensitivity refers to the ultimate change in global
mean temperature in response to a change in external forcing. Despite
decades of research attempting to narrow uncertainties, equilibrium
climate sensitivity estimates from climate models still span roughly 1.5
to 5 degrees Celsius for a doubling of atmospheric carbon dioxide
concentration, precluding accurate projections of future climate. The
spread arises largely from differences in the feedback from low clouds,
for reasons not yet understood. Here we show that differences in the
simulated strength of convective mixing between the lower and middle
tropical troposphere explain about half of the variance in climate
sensitivity estimated by 43 climate models. The apparent mechanism is
that such mixing dehydrates the low-cloud layer at a rate that increases
as the climate warms, and this rate of increase depends on the initial
mixing strength, linking the mixing to cloud feedback. The mixing
inferred from observations appears to be sufficiently strong to imply a
climate sensitivity of more than 3 degrees for a doubling of carbon
dioxide. This is significantly higher than the currently accepted lower
bound of 1.5 degrees, thereby constraining model projections towards
relatively severe future warming.
}},
doi = {10.1038/nature12829},
adsurl = {http://adsabs.harvard.edu/abs/2014Natur.505...37S},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
@article{2014JAtS...71.3350L,
author = {{Lahellec}, A. and {Dufresne}, J.-L.},
title = {{A Formal Analysis of the Feedback Concept in Climate Models. Part II: Tangent Linear Systems in GCMs}},
journal = {Journal of Atmospheric Sciences},
year = 2014,
month = sep,
volume = 71,
pages = {3350-3375},
doi = {10.1175/JAS-D-13-0334.1},
adsurl = {http://adsabs.harvard.edu/abs/2014JAtS...71.3350L},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
@article{2014JCli...27...41B,
author = {{Bodas-Salcedo}, A. and {Williams}, K.~D. and {Ringer}, M.~A. and
{Beau}, I. and {Cole}, J.~N.~S. and {Dufresne}, J.-L. and {Koshiro}, T. and
{Stevens}, B. and {Wang}, Z. and {Yokohata}, T.},
title = {{Origins of the Solar Radiation Biases over the Southern Ocean in CFMIP2 Models*}},
journal = {Journal of Climate},
year = 2014,
month = jan,
volume = 27,
pages = {41-56},
doi = {10.1175/JCLI-D-13-00169.1},
adsurl = {http://adsabs.harvard.edu/abs/2014JCli...27...41B},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
