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56 votes

Global warming - why doesn´t mankind collect heat (thermal energy) and turn it into electricity or send it to space?

This is due to thermodynamics, the three laws of which can be summarized as 1) You can't win; 2) You can't even break even; 3) You can't leave the game. The crucial point here is that heat engines don'...
jamesqf's user avatar
  • 1,758
34 votes
Accepted

Do fossil fuels insulate the crust from the Earth's interior?

Quoting from John Russell's response to this article, "This is arrant nonsense!" Russell concludes with How did this paper get through the peer-review and editorial review processes? What ...
David Hammen's user avatar
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32 votes
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Global warming - why doesn´t mankind collect heat (thermal energy) and turn it into electricity or send it to space?

Collecting thermal energy is really hard. As others have said, things like heat pumps exist for moving heat around, but the laws of thermodynamics (which are fairly fundemantal in physics) require ...
Semidiurnal Simon's user avatar
15 votes

Do fossil fuels insulate the crust from the Earth's interior?

What neither the authors nor the response by John Russell takes into account is that all underground oil and gas is stored inside tiny pores of rocks. An oil reservoir is not a big underground cave, ...
semi-extrinsic's user avatar
15 votes
Accepted

Why does it rain more at night than during the day?

First off, your observation that Tamil Nadu gets more rainfall in the evening is partially backed by records. Sahany, Venugopal, and Nanjundiah, 2010 provide data on diurnal scale rainfall ...
kingledion's user avatar
  • 3,376
15 votes
Accepted

Is the global temperature of the earth a physical quantity at all?

There is no unique way to define a global average temperature of the Earth, but that does not mean that calculation of such a quantity is "pointless". If someone tells me that the average ...
David Bailey's user avatar
  • 1,018
14 votes

Sea Level Rise due to Climate Change

The first part of the association is that increasing levels of greenhouse gases in the atmosphere will cause rising temperatures on earth. Here is some information on why that is so, if you are ...
kingledion's user avatar
  • 3,376
11 votes

Global warming - why doesn´t mankind collect heat (thermal energy) and turn it into electricity or send it to space?

Like passive radiative cooling? The new materials reflect a broad spectrum of light, in much the same way as mirrors or white paint do. In the crucial 8–13-µm part of the infrared spectrum, however,...
Rupert Morrish's user avatar
7 votes
Accepted

Why doesn't subducted earth crust melt?

...the submerging plate is always drawn as deep (seemingly tens of km) into molten rock... It's actually hundreds of kilometres, not tens of them. But let me correct a common misconception: The ...
Gimelist's user avatar
  • 23.1k
7 votes

What is the average temperature of the whole planet Earth, not just the surface?

TL;DR: Approximately $2700\,\text K$ ($2400\text{°C}$, $4400\text{°F}$) Assuming that the weights are indeed the heat capacity per unit volume $C$ and that $C \approx \rho C_P$, where $\rho$ is the ...
Wood's user avatar
  • 241
6 votes

Why is the pond in my backyard not frozen when it is -15 °C (5 °F) outside?

The variable you need to consider to understand the problem is the pond's depth. I bet that in contrast to your pond, shallow puddles around did freeze. The water is denser at 4°C, so to freeze the ...
Camilo Rada's user avatar
  • 17.7k
6 votes

Sea Level Rise due to Climate Change

It's a harder direct relation to show that it appears. On the surface, warmer = less ice, file under "duh", but while it probably is that simple, showing a causal relation is a more difficult. The ...
userLTK's user avatar
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6 votes
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A balloon falling from space?

You cannot leave "temperature outside", as temperature is the key factor to know if the balloon would pop or not. Let's set up some assumptions about the problem so we can calculate something: The ...
Camilo Rada's user avatar
  • 17.7k
6 votes

Global warming - why doesn´t mankind collect heat (thermal energy) and turn it into electricity or send it to space?

As others have pointed out, if you use the energy, it turns right back into heat. Radiating it back to space is at least theoretically possible. But there is a problem with scale. The Earth ...
Stig Hemmer's user avatar
5 votes

Please help in understanding redox buffers

First let me start by saying that redox buffers are a made-up thing. All these QFM (actually FMQ) or NNO or other abbreviations don't exist in nature. They were developed as a way to "cheat" in ...
Gimelist's user avatar
  • 23.1k
5 votes
Accepted

Sensible and Latent Heat. how to separate them

First some definitions: Latent heat is the heat that leaves or enters a system during a process where the temperature of the system stays constant. Phase changes are prime examples where latent heat ...
Jeffrey J Weimer's user avatar
4 votes

Is global warming being moderated by latent heat of melting polar ice?

This IPCC graph (discussed here) shows the amounts of heat going into oceans, atmosphere, land and ice melting. Plot of energy accumulation in zettajoules within distinct components of Earth’s ...
Keith McClary's user avatar
4 votes

what is the best way to actually make the Earth lose heat?

What is the best way to actually make the Earth lose heat? TL;DR: Stop pumping so much carbon dioxide into the atmosphere. The easiest approach in terms of human effort would be to let the Earth ...
David Hammen's user avatar
  • 23.7k
4 votes

what is the best way to actually make the Earth lose heat?

On earth, heat can leave an object through conduction, convection or radiation. In space, conduction and convection do not work because there is insufficient matter. So the only way for heat to leave ...
Semidiurnal Simon's user avatar
4 votes

Global warming - why doesn´t mankind collect heat (thermal energy) and turn it into electricity or send it to space?

Just to hammer it down: the amount of energy transferred to Earth by the sun every single day is colossal. In comparison, the heat generated by all human activities is negligible. For instance, ...
kuroi neko's user avatar
3 votes

Do fossil fuels insulate the crust from the Earth's interior?

I honestly wish I could come up with a better answer for this question but the original article is so horrible I'm not sure where to even begin responding to it. For starters, it's published in a ...
Braeden Orchard's user avatar
3 votes

Sea Level Rise due to Climate Change

The argument and science behind this idea is well summarized on the Union of Concerned Scientist web page on global warming as it causes sea levels to rise. There is a link to a white paper which ...
Tyler Durden's user avatar
  • 1,804
3 votes

Why is the pond in my backyard not frozen when it is -15 °C (5 °F) outside?

The question doesn't say if the pond is stream fed. If it is groundwater fed - it will take much longer to freeze, due to the fact that the groundwater is moving through an insulated body (ground) and ...
paul leclerc's user avatar
3 votes

Why is the pond in my backyard not frozen when it is -15 °C (5 °F) outside?

The air temperature is 5 degrees. The water temperature is not. Same reason a bowl of soup or cup of coffee stays hotter than room temperature for some time before it cools down to room temperature. ...
Tim's user avatar
  • 31
3 votes

What is the relationship between the derivatives of specific volume and potential temperature with height?

$$\theta=T\left(\frac{P_0}{P}\right)^\frac{R_d}{c_p} \tag{1}$$ $$\alpha=R_d T P^{-1} \tag{2}$$ $$\frac{\partial P}{\partial z}=-\rho g \tag{3}$$ It can be shown that $$\frac{\partial \theta}{\partial ...
BarocliniCplusplus's user avatar
3 votes
Accepted

How do I find the temperature of the air mass, and how do I use a t-skew chart?

I don't want to answer your question explicitly because it will ruin your education. Instead, I will guide you by asking three questions: Where on the Skew-T are you? Where on the Skew-T do you want ...
BarocliniCplusplus's user avatar
3 votes

Does air in the atmosphere get friction due to the planet's rotation?

The short answer is yes. Whenever a fluid moves against something else it will experience friction, it's a function of fluid dynamics. The atmosphere is a weakly viscous fluid, but friction is ...
Fred's user avatar
  • 24.7k
3 votes

Does air in the atmosphere get friction due to the planet's rotation?

Since you say "due solely to the planet's rotation", the best answer might be "No." The atmosphere rotates as a body with the planet. The interplanetary medium is so diffuse there ...
Mark Foskey's user avatar
2 votes

Is global warming being moderated by latent heat of melting polar ice?

The assumption that 15,000 km3 is melted in one year is not correct. This is approximately the amount that will melt in the melt-season. In the winter it will grow back again. Check PIOMAS website for ...
Frank's user avatar
  • 21
2 votes

How do we measure (or empirically calculate) the amount of entropy in the atmosphere and oceans?

It is possible to compute the relevant moist air entropy by using the Third law values. This has been done first by Hauf and Höller (1987). A moist-air potential temperature has been defined by ...
Pascal Marquet's user avatar

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