lmd_Hourdin2001.bib
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@article{2001JGR...10628113B,
author = {{Bonazzola}, M. and {Picon}, L. and {Laurent}, H. and {Hourdin}, F. and
{SèZe}, G. and {Pawlowska}, H. and {Sadourny}, R.},
title = {{Retrieval of large-scale wind divergences from infrared Meteosat-5 brightness temperatures over the Indian Ocean}},
journal = {\jgr},
keywords = {Meteorology and Atmospheric Dynamics: Convective processes, Meteorology and Atmospheric Dynamics: General circulation, Meteorology and Atmospheric Dynamics: Numerical modeling and data assimilation, Meteorology and Atmospheric Dynamics: Tropical meteorology},
year = 2001,
month = nov,
volume = 106,
pages = {28113},
abstract = {{Over the tropics the atmospheric general circulation models usually fail
in predicting horizontal wind divergence, which is closely related to
atmospheric heating and to the vertical exchanges associated with
convection. With the aim of forcing atmospheric models we present here a
reconstruction of wind divergences based on the links between infrared
brightness temperatures, convective activity, and large-scale
divergence. In practice, wind divergences are reconstructed from
brightness temperatures using correlations obtained from numerical
simulations performed with a general circulation model. When building
those correlations, a distinction must be made between the brightness
temperatures of opaque clouds and those of semitransparent clouds, only
the former being directly associated with convection. In order to filter
out semitransparent clouds we use radiative thresholds in the water
vapor channel in addition to the window channel. We apply our approach
to Meteosat-5 data over the Indian Ocean. Comparison with wind
divergences reconstructed independently from Meteosat water vapor winds
partially validates our retrieval. Comparison with European Center for
Medium-Range Weather Forecasts analyses indicates that much can be
gained by adding information on the wind divergence in the tropics to
force an atmospheric model.
}},
doi = {10.1029/2000JD900690},
adsurl = {http://adsabs.harvard.edu/abs/2001JGR...10628113B},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
@article{2001Icar..152..384L,
author = {{Lebonnois}, S. and {Toublanc}, D. and {Hourdin}, F. and {Rannou}, P.
},
title = {{Seasonal Variations of Titan's Atmospheric Composition}},
journal = {\icarus},
year = 2001,
month = aug,
volume = 152,
pages = {384-406},
abstract = {{In order to investigate seasonal variations of the composition of
Titan's low stratosphere, we developed a two-dimensional
(latitude-altitude) photochemical and transport model. Large-scale
advection, hidden in the vertical eddy diffusion for one-dimensional
models, is accounted for explicitly. Atmospheric dynamics is prescribed
using results of independent numerical simulations of the atmospheric
general circulation. Both the mean meridional transport and latitudinal
mixing by transient planetary waves are taken into account. Chemistry is
based on 284 reactions involving 40 hydrocarbons and nitriles.
Photodissociation rates are based on a three-dimensional description of
the ultraviolet flux. For most species, the model fits well the
latitudinal variations observed by Voyager I giving for the first time a
full and self-consistent interpretation of these observations. In
particular, the enrichment of the high northern latitudes is attributed
to subsidence during the winter preceeding the Voyager encounter.
Discrepancies are observed for C $_{2}$H $_{4}$, HC
$_{3}$N, and C $_{2}$N $_{2}$ and are attributed to
problems in the chemical scheme. Sensitivity to dynamical parameters is
investigated. The vertical eddy diffusion coefficient keeps an important
role for the upper atmosphere. The wind strength and horizontal eddy
diffusion strongly control the latitudinal behavior of the composition
in the low stratosphere, while mean concentrations appear to be
essentially controlled by chemistry.
}},
doi = {10.1006/icar.2001.6632},
adsurl = {http://adsabs.harvard.edu/abs/2001Icar..152..384L},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
@article{2001AdSpR..27.1851C,
author = {{Chassefière}, E. and {Forget}, F. and {Hourdin}, F. and
{Vial}, F. and {Rème}, H. and {Mazelle}, C. and {Vignes}, D. and
{Sauvaud}, J.-A. and {Blelly}, P.-L. and {Toublanc}, D. and
{Berthelier}, J.-J. and {Cerisier}, J.-C. and {Chanteur}, G. and
{Duvet}, L. and {Menvielle}, M. and {Lilensten}, J. and {Witasse}, O. and
{Touboul}, P. and {Quèmerais}, E. and {Bertaux}, J.-L. and
{Hulot}, G. and {Cohen}, Y. and {Lognonné}, P. and {Barriot}, J.~P. and
{Balmino}, G. and {Blanc}, M. and {Pinet}, P. and {Parrot}, M. and
{Trotignon}, J.-G. and {Moncuquet}, M. and {Bougeret}, J.-L. and
{Issautier}, K. and {Lellouch}, E. and {Meyer}, N. and {Sotin}, C. and
{Grasset}, O. and {Barlier}, F. and {Berger}, C. and {Tarits}, P. and
{Dyment}, J. and {Breuer}, D. and {Spohn}, T. and {P{\"a}tzold}, M. and
{Sperveslage}, K. and {Gough}, P. and {Buckley}, A. and {Szego}, K. and
{Sasaki}, S. and {Smrekar}, S. and {Lyons}, D. and {Acuna}, M. and
{Connerney}, J. and {Purucker}, M. and {Lin}, R. and {Luhmann}, J. and
{Mitchell}, D. and {Leblanc}, F. and {Johnson}, R. and {Clarke}, J. and
{Nagy}, A. and {Young}, D. and {Bougher}, S. and {Keating}, G. and
{Haberle}, R. and {Jakosky}, B. and {Hodges}, R. and {Parmentier}, M. and
{Waite}, H. and {Bass}, D.},
title = {{Scientific objectives of the DYNAMO mission}},
journal = {Advances in Space Research},
year = 2001,
volume = 27,
pages = {1851-1860},
abstract = {{DYNAMO is a small Mars orbiter planned to be launched in 2005 or 2007,
in the frame of the NASA/ CNES Mars exploration program. It is aimed at
improving gravity and magnetic field resolution, in order to better
understand the magnetic, geologic and thermal history of Mars, and at
characterizing current atmospheric escape, which is still poorly
constrained. These objectives are achieved by using a low periapsis
orbit, similar to the one used by the Mars Global Surveyor spacecraft
during its aerobraking phases. The proposed periapsis altitude for
DYNAMO of 120-130 km, coupled with the global distribution of periapses
to be obtained during one Martian year of operation, through about 5000
low passes, will produce a magnetic/gravity field data set with
approximately five times the spatial resolution of MGS. Additional data
on the internal structure will be obtained by mapping the electric
conductivity. Low periapsis provides a unique opportunity to investigate
the chemical and dynamical properties of the deep ionosphere,
thermosphere, and the interaction between the atmosphere and the solar
wind, therefore atmospheric escape, which may have played a crucial role
in removing atmosphere and water from the planet.
}},
doi = {10.1016/S0273-1177(01)00338-6},
adsurl = {http://adsabs.harvard.edu/abs/2001AdSpR..27.1851C},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
