This section will be for planets with atmosphere. The wonderful thing is that when calculating, for planet Venus we obtain the Venus' mean surface temperature T.atmo.mean.venus = 733,66 K
This section will be for planets with atmosphere.
As we can see, planets with thin atmosphere have a very small addition to the surface mean temperature caused by their traces greenhouse gases.
But when it comes to the Venus, or to the gases giants - they have very strong greenhouse effects.
Consequently, when interracting with the emitted back to surface from the greenhouse gases IR emission energy the surface gets additionally warmed in the same exactly way as it gets warmed from the solar flux without atmosphere.
So what we have here is the surface getting warmed from two different sources, the solar flux and the greenhouse gases IR emission energy.
And the wonderful thing is that when calculating, for planet Venus we obtain the Venus' mean surface temperature
T.atmo.mean.venus = 733,66 K.
Venus' Without-Atmosphere Mean Surface Temperature calculation
R = 0,723 AU, is the Venus’ distance from the sun in astronomical units
1/R² = 1,9130
Venus’ albedo: avenus = 0,76 Bond
Venus is a gases planet, Venus’ surface solar irradiation accepting factor Φvenus = 1
β = 150 days*gr*oC/rotation*cal – is the Rotating Planet Surface Solar Irradiation Absorbing-Emitting Universal Law constant
1/243 rotations /per day, is the planet's Venus sidereal rotation spin.
On the Venus atmosphere winds are 60 times faster than the planet's Venus sidereal rotation spin. Since Venus has very thick atmosphere and being considered a gases planet, the Venus' surface rotation spin will be calculated as
N = 60* 1/243 = 60/243 = 0,24691 rotations per day
cp.venus = 0,19 cal/gr*oC, it is because the surface is regolith – dry soil
σ = 5,67*10⁻⁸ W/m²K⁴, the Stefan-Boltzmann constant So = 1.362 W/m² (So is the Solar constant)
Venus’ Without-Atmosphere Mean Surface Temperature Equation Tmean.venus is:
Tmean.venus = [ Φ (1-a) So (1/R²) (β*N*cp)¹∕ ⁴ /4σ ]¹∕ ⁴
Τmean.venus = [ 1(1-0,76)1.362 W/m² 1,9130*(150 days*gr*oC/rotation*cal *0,24691rotations/day*0,19 cal/gr*oC)¹∕ ⁴ /4*5,67*10⁻⁸ W/m²K⁴ ]¹∕ ⁴ =
Τmean.venus = [ 0,24*1.362 W/m²1,9130*(150*0,24691*0,19)¹∕ ⁴ /4*5,67*10⁻⁸ W/m²K⁴ ]¹∕ ⁴ =
= [ 0,24*1.362 W/m²1,9130*(1,6287) /4*5,67*10⁻⁸ W/m²K⁴ ]¹∕ ⁴ =
Τmean.venus = ( 4.490.620.150,82 )¹∕ ⁴ =
Tmean.venus = 258,87 K
And we compare it with the
Tsat.mean.venus = 735 K, measured by satellites.
What we see here is that planet Venus having a strong greenhouse warming effect due to the greenhouse gas CO2 96,5 % high content in the Venus' atmosphere.