Research interests

My research activities focus on the past climate of Earth and the climate of exoplanets

My expertise spans atmospheric chemistry, from 1D and 3D atmospheric modeling to the interpretation of atmospheric observations (JWST and the future Ariel mission). I developed the photochemistry module for the Generic Planetary Climate Model, the French Global Climate Model hosted at LMD, and I am now leading the development of the upper-atmosphere component within the model through the EXOTOP project. I also work on the interpretation of JWST observations of mini-Neptunes, including the submission of JWST proposals, and I am involved in the Ariel mission through the chemistry working group and the organization of the Ariel School since 2021.

Publications

Possible favored great oxidation event scenario on exoplanets around M-stars with the example of TRAPPIST-1e
Jaziri A. Y., Carrasco N., Charnay B.
Scientific Reports, Accepted. https://arxiv.org/pdf/2601.18324

Article dans une revue

2026

Possible favored great oxidation event scenario on exoplanets around M-stars with the example of TRAPPIST-1e
Jaziri A. Y., Carrasco N., Charnay B.
Scientific Reports, 2026, 16, pp.6322. ⟨10.1038/s41598-026-37144-3⟩- hal-05503066

2025

Investigating aerosols as a way to reconcile K2-18 b JWST MIRI and NIRISS/NIRSpec observations
Jaziri A. Y., Drant T.
Astronomy & Astrophysics - A&A, 2025, 702 (L20), pp.10. ⟨10.1051/0004-6361/202556905⟩- hal-05331057

Unraveling the non-equilibrium chemistry of the temperate sub-Neptune K2-18 b
Jaziri A. Y., Sohier O., Venot O., Carrasco N.
Astronomy & Astrophysics - A&A, 2025, 701, pp.A33. ⟨10.1051/0004-6361/202555496⟩- hal-05257485

Modelling the effect of volcanic outgassing of sulphur on early Martian surface temperatures using a 3-D Global Climate Model
Braude A., Kerber L., Lefèvre F., Jaziri Y., Hamid S., Lefevre M., Maurice M., Millour E., Forget F.
Icarus, 2025, 436, pp.116568. ⟨10.1016/j.icarus.2025.116568⟩- hal-05086248

Transient oxidation of hazes a source of nutrients during the great oxidation event
Maratrat L., Jaziri Y., Millan M., Moulay V., Vettier L., Govekar T., Abello A., Carrasco N.
Scientific Reports, 2025, 15 (29284), pp.29284. ⟨10.1038/s41598-025-13441-1⟩- hal-05217709

2024

ARES VI. Viability of one-dimensional retrieval models for transmission spectroscopy characterization of exo-atmospheres in the era of JWST and Ariel
Jaziri Y., Pluriel W., Bocchieri A., Panek E., Teinturier L., Ivanova A., Rektsini N., Drossart P., Beaulieu J.-P., Falco A., Leconte J., et al.
Astronomy and Astrophysics - A&A, 2024, 684, pp.A25. ⟨10.1051/0004-6361/202347379⟩- insu-04392384

2022

Dynamics of the Great Oxidation Event from a 3D photochemical–climate model
Jaziri A. Y., Charnay B., Selsis F., Leconte J., Lefèvre F.
Climate of the Past, 2022, 18, pp.2421-2447. ⟨10.5194/cp-18-2421-2022⟩- insu-03452990

2021

ARES V: No evidence for molecular absorption in the HST WFC3 spectrum of GJ 1132 b
Mugnai L., Modirrousta-Galian D., Edwards B., Changeat Q., Bouwman J., Morello G., Al-Refaie A., Baeyens R., Bieger M. F., Blain D., Gressier A., et al.
The Astronomical Journal, 2021, 161 (6), pp.284. ⟨10.3847/1538-3881/abf3c3⟩- hal-03277507

ARES IV: Probing the atmospheres of the two warm small planets HD 106315 c and HD 3167 c with the HST/WFC3 camera
Guilluy G., Gressier A., Wright S., Santerne A., Jaziri A. Y., Edwards B., Changeat Q., Modirrousta-Galian D., Skaf N., Al-Refaie A., Baeyens R., et al.
The Astronomical Journal, 2021, 161 (1), pp.19. ⟨10.3847/1538-3881/abc3c8⟩- hal-03014031

2020

ARES. II. Characterizing the Hot Jupiters WASP-127 b, WASP-79 b, and WASP-62b with the Hubble Space Telescope
Skaf N., Bieger M. F., Edwards B., Changeat Q., Morvan M., Kiefer F., Blain D., Zingales T., Poveda M., Al-Refaie A., Baeyens R., et al.
The Astronomical Journal, 2020, 160 (3), pp.109. ⟨10.3847/1538-3881/ab94a3⟩- insu-02928912

ARES. III. Unveiling the Two Faces of KELT-7 b with HST WFC3
Pluriel W., Whiteford N., Edwards B., Changeat Q., Yip K. H., Baeyens R., Al-Refaie A., Bieger M. F., Blain D., Gressier A., Guilluy G., et al.
The Astronomical Journal, 2020, 160 (3), pp.112. ⟨10.3847/1538-3881/aba000⟩- hal-02937302

ARES I: WASP-76 b, A Tale of Two HST Spectra
Edwards B., Changeat Q., Baeyens R., Tsiaras A., Al-Refaie A., Taylor J., Yip K. H., Bieger M. F., Blain D., Gressier A., Guilluy G., et al.
The Astronomical Journal, 2020, 160 (1), pp.8. ⟨10.3847/1538-3881/ab9225⟩- insu-02867199

Communication dans un congrès

2025

Deciphering the origin of organo-sulphur hazes: an exploration of the actual limits of sulphur chemistry with potential implications for prebiotic chemistry, the Early-Earth, and habitability of sulphur exoplanets
Maratrat L., Carrasco N., Jaziri Y. A., Vettier L., Millan M.
EPSC-DPS Joint Meeting 2025, Sep 2025, Helsinki, Finland. ⟨10.5194/epsc-dps2025-326⟩- hal-05281546

Poster de conférence

2024

Investigating the possibility of H2O2-induced warming on early Mars with a 3D GCM
Maurice M., François F., Luo Y., Lefèvre F., Jaziri Y., Millour E., Turbet M., Braude A.
Europlanet Science Congress 2024, Sep 2024, Berlin, Germany. EPSC Avstracts, 17, pp.EPSC2024-1051, ⟨10.5194/epsc2024-1051⟩- insu-04677236

Communication dans un congrès

Modelling the Effect of the Sulphur Cycle on Episodic Climactic Changes on Early Mars
Braude A., Kerber L., Lefèvre F., Jaziri Y., Hamid S., Maurice M., Lefevre M., Millour E., Forget F.
Europlanet Science Congress 2024, Sep 2024, Berlin, Germany. pp.EPSC2024-135, ⟨10.5194/epsc2024-135⟩- insu-04676754

Sulphur organic aerosols and their contribution to prebiotic chemistry
Maratrat L., Carrasco N., Chatain A., Buch A., Vettier L., Drant T., Jaziri Y., Sohier O., Millan M.
Europlanet Science Congress 2024, Sep 2024, Berlin, Germany. pp.EPSC2024-945, ⟨10.5194/epsc2024-945⟩- insu-04682971

Understanding the chemistry of temperate exoplanets atmospheres: A study of oxidized organic compounds as precursors of photochemical condensates
Sohier O., Jaziri Y., Vettier L., Carrasco N., Chatain A., Maratrat L.
Europlanet Science Congress 2024, Sep 2024, Berlin, Germany. pp.EPSC2024-218, ⟨10.5194/epsc2024-218⟩- insu-04687572

Modelling the sulphur cycle on early Mars
Braude A., Kerber L., Lefèvre F., Jaziri Y., Hamid S., Millour E., François F.
Tenth International Conference on Mars, Jul 2024, Pasadena, United States. pp.LPI Contribution No. 3007, 2024, id.3030- insu-04691189

Understanding the chemistry of temperate exoplanet atmospheres: A study of oxidized organic compounds as precursors of photochemical condensates
Sohier O., Jaziri Y., Vettier L., Chatain A., Maratrat L., Carrasco N.
SF2A-2024, Jun 2024, Marseille, France. pp.249-252- hal-04926933

Modeling the effect of volcanic outgassing of sulfur on early Martian climate and geology
Braude A., Kerber L., Lefèvre F., Jaziri Y., Hamid S., Millour E., Forget F.
Lunar and Planetary Science Conference 2024, Mar 2024, The Woodlands, United States- insu-04466214

2023

Modelling the sulphur cycle on early Mars
Braude A., Kerber L., Lefèvre F., Jaziri Y., Hamid S., Millour E., François F.
55th Annual Meeting of the Division for Planetary Sciences, Oct 2023, San Antonio (TX), United States- insu-04392417

2021

Photochemistry of planetary atmospheres with 3D Global Climate Model
Jaziri Y., Charnay B., Selsis F., Leconte J., Lefèvre F.
AASTCS8, Habitable Worlds 2021, Mar 2021, Virtual Meeting, Unknown Region. pp.id. 1045- insu-04548367