Venus Evolution Through Time: Key Science Questions, Selected Mission Concepts and Future Investigations

Journal article

Collisional parameters of H2O with CO2 are currently missing from international spectroscopic databases, although they are essential for accurate modeling of water vapor in CO2-rich planetary atmospheres. In this study, high-resolution infrared spectra of H2O broadened by CO2 were recorded using a Fourier Transform Spectrometer in the 1.18 and 2.34 µm spectral regions. CO2-collisional parameters for selected H2O transitions were derived through a multispectrum fitting procedure employing both Voigt and quadratic speed-dependent Voigt profiles. Furthermore, calculations based on the semi-classical Complex Robert-Bonamy-Ma formalism were performed to estimate CO2-broadened half-widths, line shifts, and their temperature dependencies across various atmospheric transparency windows. It results in a strong agreement between theoretical predictions and experimental data. Finally, the shared calculated linelist, obtained for a wide range of transitions, can be directly applied to radiative transfer modeling of atmospheres primarily composed of carbon dioxide

Authors: Widemann, T; Smrekar, SE; Garvin, JB; Straume-Lindner, AG; Ocampo, AC

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer
• Journal: Space Science Reviews
• Volume: 219
• Issue: 7
• Pages: 56
• Article number: 56
• Publication date: 2023-10-03
• DOI: 10.1007/s11214-023-00992-w
• EISSN: 1572-9672
• ISSN: 0038-6308
• Language: English
• Keywords: Astronomy; Orbiter; Astrobiology; Systems engineering; Aerospace engineering; Aeronautics; Physics; Payload (computing); Computer science; Habitability; Engineering; Planet; Geology; Remote sensing; Venus; Space exploration