Q: Is atmosphere more likely to be retained if the gravity it is subject to is high and the temperature of the atmosphere is low? ¶
Q: Are atmospheres not uniform in temperature? ¶
A: Yes, so the exact determination of the atmospheric pressure at any particular altitude is more complex.
Q: Is atmosphere an evolutionary agent essential to the shaping of a planet? ¶
Q: Is atmosphere ionised by incoming solar radiation? ¶
Q: Is atmosphere heated to temperatures over 1,000 K? ¶
A: Yes, and is steadily escaping into space.