Exoclimes Simulation Platform (ESP)

Exoclimes Simulation Platform (ESP)

ESP Computer Codes

The Exoclimes Simulation Platform (ESP) is a vision to provide the scientific community with publicly-available computer codes designed to simulate the climates of exoplanets, including radiative transfer, chemistry and fluid dynamics.  It is based on the belief that a healthy exoplanetary atmospheres community should compete to publish the best ideas, rather than be constrained by proprietary software.  It is also based on the belief that science should be reproducible and accessible to everyone who is interested.  The ESP family of codes include THOR (a non-hydrostatic general circulation model), HELIOS (an improved two-stream radiative transfer code), VULCAN (a chemical kinetics code), HELIOS-K (an opacity calculator), HELIOS-R2 (an atmospheric retrieval code), HELA (a machine-learning retrieval code), LX-MIE (a Mie scattering code), etc.

Exo-Atmospheres Summer School

The Exo-Atmospheres Summer School (EASS) is a week-long immersion in the theory and simulation of the atmospheres of exoplanets. It consists of four events combined into one: introductory lectures, a conference, a beginner’s hackathon and an expert’s hackathon. The introductory lectures will cover the basics of exoplanetary atmospheres as a one-day “crash course”: radiative transfer, chemistry, fluid dynamics. The two-day conference is focused on speakers who are practitioners in the theory and simulation of exoplanetary atmospheres. In particular, we will prioritise giving talk time to junior researchers who actively work on research problems in this field. The beginner’s hackathon introduces students and postdocs to the open-source codes of the Exoclimes Simulation Platform (ESP; The expert’s hackathon is a forum for experts in the field to compare and discuss different computational tools. For 2020, we have invited Prof. Ray Pierrehumbert (Oxford) and Prof. Nathan Mayne (Exeter) for the expert’s hackathon.


The EASS is primarily aimed at students and postdocs who are interested in the theory and simulation of exoplanetary atmospheres.  To apply, please send a one-page letter (use a maximum of two pages only if you must) with the following information:

1. Indicate your email address somewhere in the letter.
2. Describe your path of education so far: degrees earned and universities/institutions attended.
3. List your Ph.D and/or postdoc advisors.
4. Describe your research interests briefly.
5. Describe very briefly why you are interested in the summer school.
6. If you are interested in giving a talk, please provide a title and brief abstract.

This letter should be in PDF format and sent to Kevin Heng ( by 30th April 2020.  Early applications are allowed and encouraged.  You will be invited by Danielle Zemp ( to pay the registration fee of 500 Swiss francs (CHF).