That year I was accepted as a student in the Group of Planetary
Atmospheres (the now called Solar
System Department) of the Instituto de
Astrofisica de Andalucia, (IAA), under the supervision of Manuel
Lopez-Puertas, who guided the work on radiative transfer in conditions out
of local thermodynamic equilibrium (LTE) that lead to my thesis work.
I got my D. Phil. degree in Physical Sciences by the same University in
1990, with a dissertation titled "Infrared Emissions in the Atmosphere of
In 1993 I got a permanent position as Researcher of the CSIC (Spanish Council of Scientific Research),
and I am based at the IAA, where I continue
learning in all those directions and trying to apply my experience through
my envolvement in several on-going
Non-LTE Modelling of IR Emissions in Mars' Atmosphere
Several publications describe the
theoretical model developed for the
study of the IR emissions of the upper atmosphere of Mars, a study
performed for my Ph.Degree and for the project PMIRR, in colaboration
University and the JPL. Unfortunately the instrument was on board
the two malograted NASA missions to Mars: the Mars Observer and
the Mars Climate Orbiter ... so ... the predictions are still to be
A very important application of our time-consuming and elaborated
non-LTE models is the possibility to apply them to large Global
Circulation Models (GCM). The models are being used to create fast
schemes or parameterizations to allow for non-LTE effects to be
incorporated into the GCMs. I did some work at NASA-Ames for the
solar heating term, and now I am devoted to the thermal cooling term,
within an ongoing ESA project for a Mars Climate Database.
Retrieval of Middle Atmosphere CO in Polar Regions
I have been working for several years in the difficult validation of
the retrievals of CO from the ISAMS measurements at 4.7 um, affected
by non-LTE and with not a large SNR in the mesosphere. The effort was
well worthy and the best dataset of CO in the middle atmosphere is
now available from the ISAMS archive. The data show very interesting
information about dynamics of the middle atmosphere, and will possibly
keep many modellers busy for a long time trying to understand all that.
At last we could complete some analysis of the wideband radiances
measured by the instrument ISAMS in 1991-1992. The data taken in its
channel 00W was not designed for this purpose but we have applied our
non-LTE models and detailed line-by-line calculations in order to
extract all the information we can about the interesting problem of
the CO2 abundances in the MLT region (upper mesosphere and the lower
thermosphere). In particular we wanted to study the possible time and
spatial variability, and the difficult comparison with theoretical
predictions so far ... We are still working on this topic!
A similar exercise to the non-LTE studies for the Martian atmosphere
but now for Venus. This is a recent work carried out for the Ph. Degree
of Cristina Roldan, here at the I.A.A., which tries to apply our
experience and models to Venus, more than a decade after the last studies
of this kind were done in that planet by Stephen Bougher and his
coworkers, at the University of Arizona.
More information ... available soon
Radiative properties of CO2 Atmospheres
Our insight into the non-LTE behaviour of the CO2 emissions
in Mars and Venus, the thermal cooling and solar heating by the
vibrationa-rotational CO2 transitions in the upper atmosphere,
and their radiative lifetimes and damping rates, allow us to
compare between those two planetary atmospheres and try to understand
their similarities and differences.
More information ... available soon
Implementation of non-LTE on line-by-line radiation codes
Our long collaboration with David Edwards improved from his sabbatical
in Granada in 1993, in the A.I.R.E. group, where we all worked on
incorporating non-LTE proceses in the line-by-line code GENLN2.
This work has permitted a number of interesting analysis of satellite
data, as presented in some of our publications.