Written by Christos I. Vournas,
M.sc. mechanical engineer
We do planets and moons surface temperatures comparison.
The presence of atmosphere doesn't warm Earth's surface.
It is the other reasons, not the presence of atmosphere, that make Earth warmer than the Moon by +68°C.
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Key words:
Specular Reflection
Φ - Solar Irradiation Accepting Factor (spherical shape and surface roughness coefficient), for smooth bodies Φ = 0,47 and for rough / porous Φ = 1
Immediate IR Emission
Rotational Warming Phenomenon ( N*cp )1/16
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The Planet Surface Rotational Warming Phenomenon
The method we use in this research is the "Planet Surface Temperatures Comparison Method".
The data available are from observatories and satellite measurements.
The data:
1). The solar flux's intensity upon the planet surface "S".
2). The planet surface average Albedo "a".
3). Planet surface temperatures "T" K.
4). Planet rotational spin value "N" rotations/day.
5). Planet surface composition (planet average surface specific heat "cp" cal/gr.oC).
6). Planet surface Φ-factor - the planet surface Solar Irradiation Accepting Factor (the planet surface shape and roughness coefficient).
We have resulted to an important discovery:
The planet mean surface temperatures relate (everything else equals) according to their (N*cp) products’ sixteenth root.
The consequence of this discovery is the realization that a planet with a higher (N*cp) product (everything else equals) appears to be a warmer planet.
We call it the Planet Surface Rotational Warming Phenomenon.
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We are able to Theoretically calculate for the planet without-atmosphere the mean surface temperature.
For every planet without atmosphere there is the theoretical uniform surface effective temperature Te.
Te = [ Φ (1-a) S /4σ ]¹∕ ⁴
And for every planet without atmosphere there is the average surface temperature (the mean surface temperature) Tmean.
Thus we can write
Tmean = Te * X
where X is a coefficient which calculates the planet Tmean from the planet known Te.
The X is a different and very distinguished for every different planet number.
Notice:
The planet Te is theoretically calculated by the Stefan-Boltzmann emission law, when the planet average surface Albedo, and the solar flux upon the planet surface are known.
Te = [ Φ (1-a) S /4σ ]¹∕ ⁴
Now, we can accept that for every planet (ι) there is a Te.ι and there is a Tmean.ι
We can accept that for every planet (ι) there is a Xι, there is a Te.ι and there is a
Tmean.ι = Te.ι* Xι
So we have here
Tmean.ι = Te.ι * Χ.ι
or
Tmean.ι = [ Φ.ι (1 - a.ι) S.ι (X.ι)⁴ /4σ ]¹∕ ⁴
Conclusion:
We have admitted that for every planet (ι) there is a different for each planet (ι) a factor [(X.ι)⁴ ], which relates for the purpose to theoretically calculate for the planet (ι) the average (mean) surface temperature Tmean.ι
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by simply multiplying the X.ι with planet (ι) theoretical uniform surface effective temperature Te.ι
Also for every planet (ι) without atmosphere we have the planet (N.ι*cp.ι) product.
I have demonstrated in my website that planet mean surface temperatures relate (everything else equals) according to their (N*cp) products’ sixteenth root.
Thus we can in the equation
Tmean.ι = [ Φ (1-a) S (X.ι)⁴ /4σ ]¹∕ ⁴
the (X.ι)⁴ term to replace with the (β *N.ι *cp.ι) ¹∕ ⁴ term
where
a.ι – is the planet (ι) the average surface Albedo
Φ.ι – is the solar irradiation accepting factor (for smooth surface planets Φ = 0,47 and for rough surface planets Φ = 1)
N.ι – is planet (ι) rotational spin (rot/day)
cp.ι – is the planet average surface specific heat (cal/gr.oC)
β = 150 days*gr*oC/rotation*cal is a Rotating Planet Surface Solar Irradiation INTERACTING-Emitting Universal Law constant
Consequently, for every without-atmosphere planet (ι) we have:
Tmean.ι = [ Φ.ι (1 - a.ι) S.ι (β *N.ι *cp.ι)¹∕ ⁴ /4σ ]¹∕ ⁴
Conclusion:
The above formula theoretically calculates the planets without atmosphere mean surface temperatures with very closely matching to the satellite measured temperatures results.
Planet….Te……Tmean….Tsat.mean
Mercury..439,6 K..325,83 K…340 K
Earth…..255 K….287,74 K….288 K
Moon…..270,4 Κ…223,35 Κ…220 Κ
Mars….209,91 K…213,21 K….210 K
Notice:
The planet mean surface temperatures Tmean are very much precisely being measured by satellites.
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A Simple Theorem, but a very important Theorem.
From the above...
for every without-atmosphere planet (ι) we have:
Tmean.ι = [ Φ.ι (1 - a.ι) S.ι (β *N.ι *cp.ι)¹∕ ⁴ /4σ ]¹∕ ⁴
or
Tmean = [ Φ (1 - a) S (β*N*cp.)¹∕ ⁴ /4σ ]¹∕ ⁴
or it can be re-written as
Tmean = Te * [(β*N*cp.)¹∕ ⁴]¹∕ ⁴
The Theorem:
The planet mean surface temperature Tmean numerical value will be equal to the planet effective temperature Te numerical value Tmean = Te only when the term
(β*N*cp) = 1
and, since the
β = 150 days*gr*oC/rotation*cal
the planet N*cp product should be then
N*cp = 1 /β
or the numerical value of the product
N*cp = 1 /150
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The Theorem leads to the following very important conclusions:
1). In general, the planet effective temperature numerical value Te is not numerically equal to the planet without-atmosphere mean surface temperature Tmean.
2). For the planet without-atmosphere mean surface temperature numerical value Tmean to be equal to the planet effective temperature numerical value Te the condition from the above Theorem the (N*cp = 1 /150) should be necessarily met.
3). For the Planet Earth without-atmosphere the (N*cp) product is (N*cp = 1) and it is 150 times higher than the necessary condition of (N*cp = 1/150) .
Consequently, Earth's effective temperature Te the numerical value cannot be equal to Earth's without-atmosphere mean surface temperature... not even close.
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Table of contents - Links
0). Explain Rotational Warming Model.
Demonstrate the Initial PREMISE, Links: (1) and (2)
3).The Planetary Temperatures Comparison Criteria.
4). "The total amount of the specularly reflected portion of solar flux"
5). How A Planet Retains The Solar Energy - the role of the Immediate IR emission.
6). Φ -Factor is an analogue of the well known Drag Coefficient Cd=0,47
7). “What ‘portion’ of ‘sunlight’ reaches surface of Earth?”
8). The satellites do not measure Bond Albedo.
9). Stefan-Boltzmann formula J = σ T4 W/m² doesn't apply to terrestrial temperatures.
10). The Theoretical Equation.
12). The actual reason of the observed Global Warming.
13). The Axial Precession's role in Global Warming.
14). The Original Milankovitch cycle.
15). The Reversed Milankovitch cycle.
16). The higher CO2 content in ice core samples relates to colder periods.
17). Sensible Heat /Latent Heat ratio.
18). The conventional greenhouses, and the role of immediate IR emission.
19). NASA Technical Memorandum An Earth Albedo Model
20). The yearly total Immediate IR Emitted solar energy - in our times - is lower.
21). The yearly total reflected solar energy - in our times - is lower.
Appendix - Links
1). Earth's Corrected Effective Temperature (210 K ) calculation.
2). Earth's Average Surface Temperature (288 K ) calculation.
3). Moon's Corrected Effective Temperature (224 K ) calculation.
4). Moon's Average Surface Temperature (220 K ) calculation.
5). Mars' Corrected Effective Temperature (174 K ) calculation.
6). Mars' Average Surface Temperature (210 K ) calculation.
7). Mercury's Corrected Effective Temperature (364 K ) calculation.
8). Mercury's Average Surface Temperature (340 K ) calculation.
9). Titan's Average Surface Temperature (93,7 K ) calculation.
10). Earth / Mars satellite measured mean surface temperatures 288 K and 210 K comparison.
11). Earth's /Moon's temps 288K /220K comparison.
13). Blog.
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The table of contents will be completed some time soon. For more pages view the menu at the top.
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