rugged compass
It seems that the bug of planets with too cold of atmospheres has returned in the beta branch.
The first image was with the beta at and shows the temp at 255k while the main branch has it at 287k which is more accurate based on it's insolation, albedo and greenhouse effect.
On a side note, I am unable te replicate the issue with custom planets. It seems to only affect procedural planets now.
strong ice
Passed it along internally; thank you for your diligent testing!
strong ice
Thanks for taking the time to report this! The team have looked in to it, and the climate model is functioning as intended here. There was a bug back before Christmas where indeed terrestrial planets were too cold (thanks again for letting us know about that one!), and that was resolved a few months ago.
However a bug related to how windspeeds affect temperatures was not fixed until this recent beta version. The particular planet you have pointed out has a high-ish windspeed and the new bug fix correctly calculates this planet to be cooler overall than without the bug fix.
If you turn down the windspeed to 0 or closer to 0 in the planet editor (shift+F2) you will see that the temperatures adjust back to the values in your "before" image. The basic steps happening here are that an underlying base temperature is calculated and then effects like the windspeed and greenhouse effect are applied on top of that, but prior to this update the windspeed component was not correctly accounted for.
rugged compass
How would windspeed affect the average temperature? That should only affect the temp range on a planet since the energy in/out should remain the same.
The base temperature for the planet should be roughly 265k as that is it's black body temp without an atmosphere.
strong ice
From the team:
Internally, temperature calculations are looking consistent with the number you provided. The temperatures still being too low is a sign that our global circulation model (basically our equator-to-pole variance) is too simple, and we acknowledged in our blog post and technical article that this is the case. When we update it in the future, we will be sure to prioritize that part of the model. Thanks again for the input, though. it's very helpful and we do take it into consideration!
rugged compass
From the team:
Internally, temperature calculations are looking consistent with...
That would make sense. It's probably also the cause of the rotation bug I reported awhile ago.
rugged compass
The only odd thing is that the ratio of the min temp to max temp is the same between both the public and beta versions of SE. Max/Min being 1.29 for both versions on this particular planet
Huh, it's almost like windspeed is affecting the wrong paramiter?
Yeah, it's leading to some pretty big errors. It's easier to see on Earth-likes lol.
Undedited:
And edited to have no windspeed (nominal planet temp):
rugged compass
Hmmm I haven't been able to fully confirm yet but it seems planets with 1.00 atm or less seem to be unaffected by the issue.
rugged compass
Arighty I have managed to confirm it @strong ice and the issue gets worse as pressure increases. I made a test with the windspeed clamped to 5m/s (marginally more than Earth). I will also note that generally higher pressure would lead to lower windspeed irl but this makes the issue more apparent.
rugged compass
Seems the secondary factor is the scale height of the atmosphere as lower massed planets also get too cold. It only becomes very apparent on low massed terras though. (which do generate in SE)
rugged compass
Seems the secondary factor is the scale height of the atmosphere as lower massed...
Huh, it's actually just the radius of a planet that affects this.