Mars and Moon satellite measured mean temperatures comparison: 210 K and 220 K
Mars and Moon satellite measured mean temperatures comparison:
210 K and 220 K
Let's see what we have here:
Planet or Tsat.mean
Mercury 340 K
Earth 288 K
Moon 220 Κ
Mars 210 K
Let’s compare then:
Tsat.moon = 220K
Moon’s albedo is amoon = 0,136
What is left to absorb is (1 – amoon) = (1- 0,136) = 0,864
Tsat.mars = 210 K
Mars’ albedo is amars = 0,25
What is left to absorb is (1 – amars) = (1 – 0,25) = 0,75
Mars /Moon satellite measured temperatures comparison:
Tsat.mars /Tsat.moon = 210 K /220 K = 0,9545
Mars /Moon what is left to absorb (which relates in ¼ powers) comparison, or in other words the Mars /Moon albedo determined solar irradiation absorption ability:
( 0,75 /0,864 )¹∕ ⁴ = ( 0,8681 )¹∕ ⁴ = 0,9652
1. Mars /Moon satellite measured temperatures comparison
( 0,9545 ) is almost identical with the
Mars /Moon albedo determined solar irradiation absorption ability
( 0,9652 )
2. If Mars and Moon had the same exactly albedo, their satellites measured temperatures would have been exactly the same.
3. Mars and Moon have two major differences which eliminate each other:
The first major difference is the distance from the sun both Mars and Moon have.
Moon is at R = 1 AU distance from the sun and the solar flux on the top is So = 1.362 W/m² ( it is called the Solar constant).
Mars is at 1,524 AU distance from the sun and the solar flux on the top is
S = So*(1/R²) = So*(1/1,524²) = So*1/2,32 .
(1/R²) = (1/1,524²) = 1/2,32
Mars has 2,32 times less solar irradiation intensity than Earth and Moon have.
Consequently the solar flux on the Mar’s top is 2,32 times weaker than that on the Moon.
The second major difference is the sidereal rotation period both Mars and Moon have.
Moon performs 1 rotation every 29,5 earth days.
Mars performs 1 rotation every ( 24,25hours / 24hours/day ) = 1,0104 day.
Consequently Mars rotates 29,5 /1,0104 = 29,1964 times faster than Moon does.
So Mars is irradiated 2,32 times weaker, but Mars rotates 29,1964 times faster.
And… for the same albedo, Mars and Moon have the same satellite measured mean temperatures.
Let’s take out the calculator and make simple calculations:
The rotation difference's fourth root
(29,1964)¹∕ ⁴ = 2,3245
The rotation /irradiation comparison
(29,1964)¹∕ ⁴ /2,32 = 2,3245 /2,32 = 1,00195
It is only 0,195 % difference
When rounded the difference is 0,20 %
It is obvious now, the Mars’ 29,1964 times faster rotation equals the Moon’s 2,32 times higher solar irradiation.
That is why the 29,1964 times faster rotating Mars has almost the same average satellites measured temperature as the 2,32 times stronger solar irradiated Moon.
Thus we are coming here again to the same conclusion: The Faster a Planet Rotates, the Higher is the Planet's Average Temperature.
The faster a planet rotates (n2>n1) the higher is the planet’s average (mean) temperature T↑mean:
Tmin↑→ T↑mean ← T↓max