Stringent upper limits of minor species at the cloud top of Venus: PH3, HCN, and NH3

Open Access

Fig. 2

Disk-integrated TEXES spectrum of Venus (black points) recorded on July 16, 2023, between 955.21 and 955.35 cm⁻¹, corrected from the terrestrial atmospheric absorption. Models: Synthetic spectra including CO₂ (green curve), PH₃ (3 ppbv, blue curve), and PH₃ (10 ppbv, red curve).

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