Thomas Fauchez, Associate Scientist, Planetary Sciences

Thomas Fauchez

Contact Info

NASA GSFC, Planetary Environments Laboratory
8800 Greenbelt Rd., Bldg. 34, Rm. S117
Greenbelt, MD 20771
Phone: (301) 614-6230

Research Interests

Thomas Fauchez is a space research scientist employed by GESTAR/USRA at NASA GSFC in the Planetary Environments Laboratory (code 699). His research interests involve the modeling of exoplanetary atmospheres, climate and circulation using general circulation models (GCMs) with a particular emphasis on clouds. He also employs radiative transfer tools such as the Planetary Spectrum generator (PSG, to simulate atmospheric characterization of rocky exoplanets and biosignature detection with future space-based observatories. Finally Dr. Fauchez is interesting in the climate and forecast simulation of Mars to develop a global forecast system that would help future NASA Mars missions.

Before his position in planetary science, Thomas Fauchez was a NASA Postdoctoral Program (NPP) fellow at NASA GSFC, in the Climate and Radiation Laboratory (code 613) under the supervision of Steven Platnick. He worked on cirrus cloud heterogeneity impacts for MODIS cloud property retrievals, in the visible and thermal infrared.

He received his PhD in atmospheric physics at Lille University in the Laboratoire d'Optique Atmospherique (LOA) under the supervision of Pr. Philippe Dubuisson, Dr Celine Cornet and Dr Frederic Szczap (LaMP). He studied cirrus cloud heterogeneities and their impacts on the thermal infrared radiative transfer and cloud property retrievals.

Thomas Fauchez also received a master's degree in space sciences, speciality astrophysics. His master's thesis involved the study of massive star binary systems with colliding winds using XMM Newton X-rays data with the GAPHE group at Liege University, Belgium.


Dr. Thomas Fauchez is a research scientist in the Planetary Environments Laboratory at NASA Goddard Space Flight Center. His research interests concern exoplanet characterization and climate and cloud modeling, as well as Earth cloud remote sensing and 3D radiative transfer.

Ph.D. in atmospheric physics, University of Lille 1, France (Oct. 2010 - Sep. 2013)
M.S. in spatial sciences, Liège University, Belgium (Sep. 2008 – Jul. 2010)
B.S. in physic, ULCO University, France (Sep. 2005 –Jul. 2008)

GESTAR-USRA Research Scientist II (Nov. 2017- present)
Planetary Environments Laboratory, NASA GSFC, Greenbelt, USA

NASA Postdoctoral Program fellow (Nov. 2014- Oct. 2017)
Laboratory for Climate and Radiation, NASA GSFC, Greenbelt, USA
Engineer in scientific computation (Oct. 2013 – Dec. 2013)
Laboratoire d’Optique Atmosphérique (LOA), University Lille 1, France.

PhD student in atmospheric physics (Oct. 2010 – Sep. 2013)
Laboratoire d’Optique Atmosphérique (LOA), University Lille 1, France.

Academic Internship in stellar physics (Sep. 2009 – Jul. 2010)
GAPHE, Liège Space Research Institute (LisRI) , Belgium. and (May 2008 - July 2008)

- Teaching of practical classes in optics, fluid mechanics, and solid mechanics for undergraduate students (2010-2013).
- Teaching online classes for students preparing a distance learning diploma in astrophysics at the Observatoire de Paris (2015-2017).
- Scientific mediator in astrophysics at « PaLais de l’Univers et des Sciences », Capelle La Grande, France (2010 – present)

- Main convener of the session “3D Cloud Modeling as a Tool for 3D Radiative Transfer, and Conversely” of the American and Japanese Geophysical joint union AGU/JpGU 2017, Japan.
- Member of the Sellers Exoplanet Environment Collaboration (August 2017 –present)
- Member of LUVOIR study office science support analysis team (October 2017 – present)
- Associate editor in AIMS geoscience for (exo)planetary sciences. (January 2017 – present)
- Reviewer for JGR, JQSRT, RSL (2014 – present)

-Member of the American Geophysical Union
-Member of the “Societé Francaise d’Astronomie et d’astrophysique” (French astronomy and astrophysics society)
-Member of the “Societé Francaise d’Astrobiologie” (French astrobiology society)

-Award of the best PhD student talk for the IREPSE (2013)
-NASA Post-doctoral Program Fellowship Grant ~$300k (2014-2017)

Fauchez, T., S. Platnick, K. Meyer, C. Cornet, F. Szczap, and T. Varnai, Scale dependence of cirrus heterogeneity effects. Part I: MODIS thermal infrared channels, Atmos. Chem. Phys., 17, 8489-8508, 2017.
Kahn, Brian H., G. Matheou, Q. Yue, T. Fauchez, E. J. Fetzer, M. Lebsock, J. Martins, M. M. Schreier, K. Suzuki, and J. Teixeira, A satellite and reanalysis view of cloud organization, thermodynamic, and dynamic variability within the subtropical marine boundary layer, Atmos. Chem. Phys., 17, 9451-9468, 2017.
Fauchez, T., S. Platnick, O. Sourdeval, K. Meyer, C. Cornet, Z. Zhang and F. Szczap: Cirrus Heterogeneity Effects on Cloud Optical Properties Retrieved with an Optimal Estimation Method from MODIS VIS to TIR Channels., AIP Conf. Proc. 1810, 2017.
Fauchez, T., L. Rossi, D.M. Stam, The O2 A-band in fluxes and polarization of starlight reflected by Earth-Like exoplanets, The Astrophysical Journal, 842:41, 18pp, 2017.
Fauchez, T., A. B. Davis, C. Cornet, F. Szczap, S. Platnick, P. Dubuisson, and F. Thieuleux (2016), A fast hybrid (3-D/1-D) model for thermal radiative transfer in cirrus via successive orders of scattering, J. Geophys. Res. Atmos., 121, doi:10.1002/2016JD025607.
Fauchez, T., P. Dubuisson, C. Cornet, F. Szczap, A. Garnier, J. Pelon, Impacts of cloud heterogeneities on the cirrus optical properties retrieved from spatial thermal infrared radiometry, Vol 8, Issue 2, p. 633-647, AMT, DOI: 10.5194/amt-8-633-2015, 2015
Fauchez, T., C. Cornet, P. Dubuisson, F. Szczap and T. Rosambert: Impacts of cirrus cloud heterogeneities on TOA thermal infrared radiation., Atmos. Chem. Phys., 14, 5599–5615, 2014.
Szczap, F., Y. Gour, T. Fauchez, C. Cornet, T. Faure, O. Jourdan and P. Dubuisson, 3DCloud, a fast and flexible 3D cloud optical depth generator based on drastically simplified basic atmospheric equations and Fourier transform framework. Applications to stratocumulus, cumulus and cirrus cloud fields., Geosci. Model Dev., 7, p. 1779-1801, 2014.
Fauchez, T., C. Cornet, F. Szczap and P. Dubuisson, “Assessment of Cloud Heterogeneities Effects on Brightness Temperatures Simulated with a 3D Monte-Carlo Code in the Thermal Infrared”, AIP Conf. Proc. Vol. 1531, p. 75-78, 2013, DOI: 10.1063/1.4804711; International Radiation Symposium (IRS) 2012, Berlin, Germany.
Cornet, C., F.Szczap, L. C. Labonnote, T. Fauchez, F. Parol, Fr. Thieuleux, J. Riedi, P. Dubuisson, N. Ferlay, “Evaluation of cloud heterogeneities effects on total and polarized visible radiances as measured by POLDER/PARASOL and consequences on retrieved cloud properties”, AIP Conf. Proc. Vol. 1531, p. 99-102, 2013, DOI: 10.1063/1.4804717; International Radiation Symposium (IRS) 2012, Berlin, Germany.
Fauchez, T, Mi. De Becker and Y.Nazé, “The X-ray emission of the colliding wind binary V444 Cyg”. Bulletin de la Société Royale des Sciences de Liège, V. 80, pp 673-677, 2011. (, 39th Liège International Astrophysical Colloquium, LIAC 39).
Mahy, L., E. Gosset, H. Sana, G. Rauw, T. Fauchez and C. Nitschelm, “HD 150136: towards one of the most massive systems?”, Proceedings of the International Astronomical Union, Volume 6, Symposium S272, pp 521-522, July 2010. DOI: 10.1017/S1743921311011276.