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comparison of Earth's surface and the ISS's surface


comparison of Earth's surface and the ISS's surface26-09-2016 01:36
Tai Hai Chen
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(1041)
The ISS at geosynchronous orbit in LEO is at the same distance from the Sun and has the same 24 hours day. If we compare Earth's surface to the surface of the ISS, we can determine the effect of the atmosphere. AFAIK, and correct me if I'm wrong, the surface of the ISS is very hot at day, over 200 C, and very cold at night, less than -200 C, which demonstrates the atmosphere cools very slowly at night by conduction between air molecules and transfers heat to the ground via conduction, therefore having a strong moderating effect.

The moon, however, is not a good comparison because, while it has no atmosphere and is practically at the same distance from the Sun, it has much longer day and much longer night compared to Earth.
Edited on 26-09-2016 02:34
26-09-2016 03:33
Tai Hai Chen
★★★★☆
(1041)
Without the atmosphere, it is evident the ground would be much hotter at day than it is. This must be due to the air taking a lot of the heat from the ground via conduction.
Edited on 26-09-2016 03:45
26-09-2016 03:52
jwoodward48
★★★★☆
(1537)
Any heat that the atmosphere takes at day is lost during the night. It doesn't change the average temperature at all, only the standard deviation.
26-09-2016 04:36
Tai Hai Chen
★★★★☆
(1041)
jwoodward48 wrote:
Any heat that the atmosphere takes at day is lost during the night. It doesn't change the average temperature at all, only the standard deviation.


The air transfers heat back to the ground at night via conduction and radiation. Without the air, the ground would radiate heat into space unimpeded and cool off much faster. With air, air molecules transfer heat among themselves and between themselves and ground molecules via conduction and radiation. It's like a maze. Heat bounces around and around and difficult to leave into space. This is why day night temperature difference on Earth is only a few C rather than a few hundred C as in the case on the surface of the ISS.
Edited on 26-09-2016 04:56
26-09-2016 05:31
IBdaMann
★★★★★
(4230)
jwoodward48 wrote:
Any heat that the atmosphere takes at day is lost during the night. It doesn't change the average temperature at all, only the standard deviation.

Much of the thermal emission lost to space occurs on the daytime side.

The greater the temperature, the greater the power of the emission.

Energy from the sun is only absorbed on the daytime side but the entire body is constantly radiating away what it is receiving.


.


Global Warming: The preferred religion of the scientifically illiterate.

Ceist - I couldn't agree with you more. But when money and religion are involved, and there are people who value them above all else, then the lies begin. - trafn

You are completely misunderstanding their use of the word "accumulation"! - Climate Scientist.

The Stefan-Boltzman equation doesn't come up with the correct temperature if greenhouse gases are not considered - Hank

:*sigh* Not the "raw data" crap. - Leafsdude

IB STILL hasn't explained what Planck's Law means. Just more hand waving that it applies to everything and more asserting that the greenhouse effect 'violates' it.- Ceist
26-09-2016 06:27
jwoodward48
★★★★☆
(1537)
Well, yes, but we're referring to the air's dampening effect.
26-09-2016 16:03
IBdaMann
★★★★★
(4230)
jwoodward48 wrote:Well, yes, but we're referring to the air's dampening effect.

What about the air's convection?


.


Global Warming: The preferred religion of the scientifically illiterate.

Ceist - I couldn't agree with you more. But when money and religion are involved, and there are people who value them above all else, then the lies begin. - trafn

You are completely misunderstanding their use of the word "accumulation"! - Climate Scientist.

The Stefan-Boltzman equation doesn't come up with the correct temperature if greenhouse gases are not considered - Hank

:*sigh* Not the "raw data" crap. - Leafsdude

IB STILL hasn't explained what Planck's Law means. Just more hand waving that it applies to everything and more asserting that the greenhouse effect 'violates' it.- Ceist
26-09-2016 20:41
jwoodward48
★★★★☆
(1537)
It's like the "boat in a river" math problem. If during the day the air loses 5 and gets 10 energy, and then at night loses 5, there's no net change.

Convection is separate, and is another way the surface is cooled. I was responding to:

"Without the atmosphere, it is evident the ground would be much hotter at day than it is. This must be due to the air taking a lot of the heat from the ground via conduction."
17-11-2016 05:11
litesong
★★★★★
(2297)
Tai Hai Chen wrote:
The ISS at geosynchronous orbit in LEO is at the same distance from the Sun and has the same 24 hours day.


While in Low Earth Orbit (which it always is), ISS can never be in geosynchronous orbit.
21-11-2016 17:32
IBdaMann
★★★★★
(4230)
litesong wrote:While in Low Earth Orbit (which it always is), ISS can never be in geosynchronous orbit.


AGW-powered "Climate" berserkers rain down from a low earth orbit.




.


Global Warming: The preferred religion of the scientifically illiterate.

Ceist - I couldn't agree with you more. But when money and religion are involved, and there are people who value them above all else, then the lies begin. - trafn

You are completely misunderstanding their use of the word "accumulation"! - Climate Scientist.

The Stefan-Boltzman equation doesn't come up with the correct temperature if greenhouse gases are not considered - Hank

:*sigh* Not the "raw data" crap. - Leafsdude

IB STILL hasn't explained what Planck's Law means. Just more hand waving that it applies to everything and more asserting that the greenhouse effect 'violates' it.- Ceist




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