Paleoclimate Evolution on Titan After Episodic Massive Methane Outgassing Simulated by a Global Climate Model

Tokano, Tetsuya; Lorenz, Ralph D.

doi:10.1029/2021je007081

Cited by 2 publications

(1 citation statement)

References 66 publications

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“…The greenhouse effect on Titan is provided by methane and N 2 -N 2 CIA. Since the lifetime of methane is short on geological timescales, it is possible that Titan has undergone a lapse rate transition after a methane outburst event (Tokano & Lorenz, 2021).…”

Section: Discussion and Summarymentioning

confidence: 99%

Why Are Mountaintops Cold? The Transition of Surface Lapse Rate on Dry Planets

Fan,

Jansen,

Mischna

et al. 2023

Geophysical Research Letters

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Understanding surface temperature is important for habitability. Recent work on Mars has found that the dependence of surface temperature on elevation (surface lapse rate) converges to zero in the limit of a thin CO2 atmosphere. However, the mechanisms that control the surface lapse rate are still not fully understood. It remains unclear how the surface lapse rate depends on both greenhouse effect and surface pressure. Here, we use climate models to study when and why “mountaintops are cold.” We find the tropical surface lapse rate increases with the greenhouse effect and with surface pressure. The greenhouse effect dominates the surface lapse rate transition and is robust across latitudes. The pressure effect is important at low latitudes in moderately opaque (τ ∼ 0.1) atmospheres. A simple model provides insights into the mechanisms of the transition. Our results suggest that topographic cold‐trapping may be important for the climate of arid planets.

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Section: Discussion and Summarymentioning

confidence: 99%