[ES_JOBS_NET] Postdoctoral Research Fellow in Modeling Exoplanetary Atmospheres

[Nathan Steiger]

Postdoctoral Research Fellow in Modeling Exoplanetary Atmospheres

We invite applications for a postdoctoral research fellow to work on
exoplanetary atmospheres, with a particular emphasis on hydrogen-rich and
other low-mean molecular-weight (low-μ) atmospheres. We welcome candidates
interested in theoretical, numerical, and observational aspects of
atmospheres that differ substantially from modern Earth, e.g., sub-Neptunes
or Gas Giants.

Potential research topics include, but are not limited to:


   - The climate and convective regimes of hydrogen-dominated atmospheres
   and other low-μ compositions.
   - Moist and runaway greenhouse processes in hydrogen-rich environments
   like Hycean worlds.
   - Coupling between convection and large-scale circulation in low-μ
   atmospheres.
   - Radiative transfer, spectra, and observational diagnostics for
   hydrogen-rich exoplanets.

The position will involve running and analyzing numerical experiments using
a suite of models, including 1-D atmospheric column models, 3-D global
climate models (GCMs), and convection-resolving models.

*Preferred Qualifications:*


   - A PhD in planetary science, astrophysics, atmospheric science, climate
   science, earth science, or a closely related discipline.
   - Experience with one or more of the following: GCMs, cloud-resolving
   models, 1-D column models, radiative transfer modeling for exoplanets.
   - Demonstrated familiarity with atmospheric physics relevant to
   hydrogen-rich or non-Earth-like compositions (e.g., different
   thermodynamics, opacities, condensation physics).
   - Strong quantitative skills and experience analyzing large datasets
   using Python, Matlab, Julia, R, or similar tools.
   - Good programming ability and experience with high-performance
   computing.

The postdoctoral fellow will be based in the research groups of Prof. Guy
Dagan and Dr. Nathan Steiger at the Hebrew University of Jerusalem. The
initial start date is flexible, beginning anytime from January 2026 onward.
The appointment is for one year with the possibility of renewal for
additional years depending on performance. We support and encourage
flexible working hours and remote work.

We value diversity of background and thought; applicants from
underrepresented groups, non-traditional career paths, and those with a
wide range of experiences are encouraged to apply.

To apply, please email Nathan Steiger (nathan.steiger at mail.huji.ac.il) a
single PDF containing: a cover letter describing your research interests
and relevant experience, a CV, and the names and contact details of at
least three references. Review of applications will begin on December 31,
2025 and continue until the position is filled. For questions about the
position, contact Nathan Steiger (nathan.steiger at mail.huji.ac.il) or Guy
Dagan (guy.dagan at mail.huji.ac.il).

Further information about our research groups:
https://njsteiger.github.io
https://guydagan.huji.ac.il

The Hebrew University of Jerusalem is Israel’s leading research university.
The Institute of Earth Sciences is located on the Safra Campus in central
Jerusalem, a city with a pleasant Mediterranean climate, extensive
historical sites, and a thriving scientific and technology community.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.ucar.edu/pipermail/es_jobs_net/attachments/20251202/ee137ac0/attachment.htm>