Laboratoire de météorologie dynamique | LMD

• Article dans une revue

Revisiting the CO₂ stability problem of the Martian atmosphere with a three-dimensional climate-photochemistry model

Yangcheng Luo, François Forget, Franck Lefèvre

The stability of Mars's CO₂-dominated atmosphere remains incompletely understood because traditional one-dimensional photochemical models underestimate atmospheric CO mixing ratios by up to a factor of seven. Here we present the first long-term three-dimensional…

• Article dans une revue

Semi-analytical photovoltaic model estimating temperature and energy yield based on one year of outdoor measurements

Candice Banes, Olivier Quéméner, Vincent Bourdin, Benjamin Gaume, Jordi Badosa, Johan Parra

To ensure the reliability and stability of electricity grid incorporating photovoltaic (PV) generation, accurate forecasting of PV module performance is essential, which requires precise estimation of panel temperature. In this work, we developed a thermal model for PV panels, called the Semi-…

Solar Energy, 2026, 314, pp.114671. ⟨10.1016/j.solener.2026.114671⟩. ⟨hal-05640576⟩

• Article dans une revue

Pressure-induced variations of the intensity in the core regions of molecular absorption lines. A review

Jean-Michel Hartmann, Christian Boulet

About fifteen experimental studies, carried out in the last fifty years, have evidenced that the absorber-density-normalized integrated line intensities deduced from measured absorptions in the central regions of isolated transitions of molecular gases vary with the sample pressure. Quantifying and…

Journal of Quantitative Spectroscopy and Radiative Transfer, 2026, 359, pp.109941. ⟨10.1016/j.jqsrt.2026.109941⟩. ⟨hal-05698043⟩

• Article dans une revue

Helium on Mars

Jean-Yves Chaufray, Francisco Gonzalez-Galindo, Ronan Modolo, François Leblanc, François Forget, Jiandong Liu, Ehouarn Millour, Miguel Angel Lopez-Valverde, Valentin Steichen, Gérard Chanteur

In this study, we simulate the helium concentration in the Martian upper atmosphere, the capture of solar wind α particles and the escape rate of helium from different processes including: thermal escape, collision with hot oxygen and ions loss. Our simulated helium density near the exobase (~200…

Icarus, 2026, 453, pp.117058. ⟨10.1016/j.icarus.2026.117058⟩. ⟨hal-05572933⟩