pub2014.bib

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@article{2014JGRE..119..837G,
  author = {{Grassi}, D. and {Politi}, R. and {Ignatiev}, N.~I. and {Plainaki}, C. and 
	{Lebonnois}, S. and {Wolkenberg}, P. and {Montabone}, L. and 
	{Migliorini}, A. and {Piccioni}, G. and {Drossart}, P.},
  title = {{The Venus nighttime atmosphere as observed by the VIRTIS-M instrument. Average fields from the complete infrared data set}},
  journal = {Journal of Geophysical Research (Planets)},
  keywords = {Venus, Planetary atmospheres},
  year = 2014,
  volume = 119,
  pages = {837-849},
  abstract = {{We present and discuss here the average fields of the Venus atmosphere
derived from the nighttime observations in the 1960-2350 cm$^{-1}$
spectral range by the VIRTIS-M instrument on board the Venus Express
satellite. These fields include: (a) the air temperatures in the 1-100
mbar pressure range (\~{}85-65 km above the surface), (b) the altitude of
the clouds top, and (c) the average CO mixing ratio. A new retrieval
code based on the Bayesian formalism has been developed and validated on
simulated observations, to statistically assess the retrieval
capabilities of the scheme once applied to the VIRTIS data. The same
code has then been used to process the entire VIRTIS-M data set.
Resulting individual retrievals have been binned on the basis of local
time and latitude, to create average fields. Air temperature fields
confirm the general trends previously reported in Grassi et al. (2010),
using a simplified retrieval scheme and a more limited data set. At the
lowest altitudes probed by VIRTIS (\~{}65 km), air temperatures are
strongly asymmetric around midnight, with a pronounced minima at 3LT,
70{\deg}S. Moving to higher levels, the air temperatures first become
more uniform in local time (\~{}75 km), then display a colder region on the
evening side at the upper boundary of VIRTIS sensitivity range (\~{}80 km).
As already shown by Ignatiev et al. (2008) for the dayside, the cloud
effective altitude increases monotonically from the south pole to the
equator. However, the variations observed in night data are consistent
with an overall variation of just 1 km, much smaller than the 4 km
reported for the dayside. The cloud altitudes appear slightly higher on
the evening side. Both observations are consistent with a less vigorous
meridional circulation on the nightside of the planet. Carbon monoxide
is not strongly constrained by the VIRTIS-M data. However, average
fields present a clear maximum of 80 ppm around 60{\deg}S, well above the
retrieval uncertainty. Once the intrinsic low sensitivity of VIRTIS data
in the region of cold collar is kept in mind, this datum is consistent
with a [CO] enrichment toward the poles driven by meridional
circulation.
}},
  doi = {10.1002/2013JE004586},
  adsurl = {https://ui.adsabs.harvard.edu/abs/2014JGRE..119..837G},
  localpdf = {REF/2014JGRE..119..837G.pdf},
  adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

@article{JAME:JAME20069,
  author = {{Lauritzen}, P.~H. and {Bacmeister}, J.~T. and {Dubos}, T. and 
	{Lebonnois}, S. and {Taylor}, M.~A.},
  title = {{Held-Suarez simulations with the Community Atmosphere Model Spectral Element (CAM-SE) dynamical core: A global axial angular momentum analysis using Eulerian and floating Lagrangian vertical coordinates}},
  journal = {Journal of Advances in Modeling Earth Systems},
  keywords = {angular momentum, vertical discretization, spectral elements, Galerkin methods, hyperviscosity, dynamical core},
  year = 2014,
  volume = 6,
  pages = {129-140},
  abstract = {{In this paper, an analysis of the global AAM conservation properties of
NCAR's Community Atmosphere Model Spectral Element (CAM-SE) dynamical
core under Held-Suarez forcing is presented. It is shown that the
spurious sources/sinks of AAM in CAM-SE are 3 orders of magnitude
smaller than the parameterized (physical) sources/sinks. The effect on
AAM conservation by changing various numerical aspects of the dynamical
core (e.g., different vertical coordinates, reduced formal order of
accuracy, increased dissipation, and decreased divergence damping) is
investigated. In particular, it is noted that changing from Eulerian
(hybrid-sigma) to floating Lagrangian vertical coordinates does not
alter the global AAM conservation properties of CAM-SE.
}},
  doi = {10.1002/2013MS000268},
  url = {http://dx.doi.org/10.1002/2013MS000268},
  adsurl = {https://ui.adsabs.harvard.edu/abs/2014JAMES...6..129L},
  localpdf = {REF/2014JAMES.pdf},
  adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}