All Questions
Tagged with earth thermodynamics
51
questions
2
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1
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256
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How has the Earth's air pressure varied over geological time scales?
It is estimated that the Earth is losing about $5 \times 10^7 kg$ per year. Most of it due to hydrogen loss. I suppose this has an impact on the pressure of the atmosphere in general.
Thus, I am ...
CommunityBot
- 1
2
votes
1
answer
83
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How does the excess GPE of a mountain cause its base to melt?
Weisskopf suggested that the Gravitational Potential Energy (GPE) of a vertical column of mountain rock of mass $m$ must be less than the latent heat of fusion $L_f$ of the rock, i.e. $$mgh<η L_fm ...
- 26.4k
-5
votes
1
answer
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Can the four Seasons of planet Earth be defined in terms of Energy? [closed]
Can the four Seasons of planet Earth be defined in terms of Energy?
The definition of Energy gotten from Google is:
ability to do work, which is the ability to exert a force causing displacement of ...
- 11
1
vote
0
answers
30
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How do surface temperatures drop in response to optical depth?
I'm trying to come up with a super simple estimate for how atmospheric surface temperatures would be affected by a substance overhead with some optical depth $\tau$. I'll assume that the sun is always ...
- 129
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3
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Doesn't Increase of Potential Temperature with Height contradict Adiabatic Nature of Processes within Troposphere?
According to my education as a sailplane pilot our troposphere is in good approximation subject to adiabatic processes.
Using adiabatic equations of (nearly ideal) ...
2
votes
1
answer
75
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Since water can evaporate at any temperature above absolute 0, would the water cycle still be possible even without the Sun?
Since water can evaporate at any temperature (or even sublimate at less than 0°C, although at a very low rate: Why does water not evaporate in below 0 degrees?), could there be a water cycle if there ...
- 1,843
1
vote
3
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423
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Earth, re-radiation
So Earth receives radiation from the Sun, which heats it up, but then reradiation occurs and Earth loses energy into space. Lets assume the processes are perfectly balanced, this is not about the ...
CommunityBot
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2
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2
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Does radiating heat to outer space through the atmospheric transparency window have any impact on heat loss?
I was reading this article: Passive radiative cooling below ambient air temperature under direct sunlight
The authors are improving upon the age-old idea of reflecting incoming sunlight while ...
- 3,022
0
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2
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84
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What is the connection between Oort clouds and dark matter and dark energy? [closed]
I have a research assignment that I can't seem to find much info about, because it's not a very discussed or well theorized topic which is what is the connection between Oort clouds and dark matter ...
1
vote
1
answer
146
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Why do Greenhouse Gases absorb heavily in certain wavelengths? [closed]
What molecular properties make greenhouse gases absorb and reemit primarily IR radiation? That is, why are CO2, H2O and NO2 all greenhouse gases (GHGs), but others (such as helium and neon) aren't? ...
- 1,803
6
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1
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Measuring temperature at a distance
http://www.youtube.com/watch?v=gKYrXHZwtPw
In this video it is explained that Land Skin Temperature (LST) are measured by NASA's Aqua and Terra satellites.
It seems it works by collecting the ...
- 1,424
1
vote
1
answer
541
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Earth's core must be producing light, where is that light energy going?
Earth core is about 5000°C hot. It must be producing light but no one can see it. So where is that light energy going? It isn't escaping to space for sure.
- 56.4k
2
votes
1
answer
315
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Could metal rods conduct geothermal energy to the surface?
Currently geothermal heat pumps circulate a working fluid through a loop running in either a deep well or a long series of more shallow trenches. Boring a well is expensive and digging trenches chews ...
- 26.4k
2
votes
2
answers
389
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Why doesn't the Earth's temperature increase in the perihelion?
I know that what causes seasons in earth is the tilt of the earth and the fact that sun rays reach the earth from different angles during winter and summer, but why doesn't the temperature of the ...
- 207k
45
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10
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Why can't the Earth's core melt the whole planet?
Earth core temperature is range between 4,400° Celsius (7,952°
Fahrenheit) to about 6,000° Celsius (10,800° Fahrenheit).
Source
Why can't the Earth's core melt the whole planet? In other words, what ...
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