# Questions tagged [thermodynamics]

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### Ice on rocks at bottom of flowing river

I live near a river in the Pacific NW (USA) and it has been cold (low teens °F, around -10°C) for over a week. The river is about 5-6 feet (1.5–1.8 metre) deep and moving fast enough so the river at ...
1 vote
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### Thermal conductivity and diffusivity of diatomite (also known as diatomaceous earth or kieselguhr)

Cross-posted on MMSE and on Chemistry. Does anyone know where can I find measured thermal conductivity and thermal diffusivity of diatomite for different temperatures? I'm looking for the temperature ...
184 views

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

In discussions with physically educated among the deniers of the greenhouse effect, it is repeatedly claimed that it is completely pointless to state a quantity such as a global average temperature of ...
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### Does air in the atmosphere get friction due to the planet's rotation?

Does air in the atmosphere suffer friction in some way due solely to the planet's rotation?
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### Is equivalent potential temperature constant also for dry adiabatic processes?

Equivalent Potential Temperature, defined as $$\theta_e = \theta \cdot e^{qL/c_pT}$$ with $\theta$ denoting potential temperature and q the specific moisture of water remains constant for wet ...
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### Why is latent heat of water vapor included in specific enthalpy of moist air?

In a lecture book we read about latent heat of moist air. I would have guessed, that the total specific enthalpy of moist air, comprised of $m_d$ kg of dry air and $m_v$ kg of water vapor is (we have ...
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### What is the average temperature of the whole planet Earth, not just the surface?

What is the average temperature of the Earth when you take into account all of the layers, not just the surface? Everything I've found so far concern only the surface or each layer individually. But ...
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1 vote
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### Forecasted temperature in the shade vs. theoretical "feels-like" temperature in the sun

I understand that different objects absorb different amounts of light (blackbody absorption). I wonder how feasible it would be to calculate the approximate temperature in the sun based upon the ...
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### A balloon falling from space?

How long would it take for a store bought rubber balloon filled in space with air to fall from space just outside the atmosphere and touch ground? Would it Pop? Added after comments: Ideally you ...
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### Is there a table available for the maximum potential intensity of hurricanes?

The maximum potential intensity (MPI) is a computed quantity that often sets a maximum bound for maximum hurricane wind speed, though rarely, the wind speeds observed can exceed it. MPI is based off ...
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### Is the ocean guaranteed to warm in a warming climate, regardless of whether it absorbs LW radiation?

More specifically, I've seen some discussion of this article: http://www.realclimate.org/index.php/archives/2006/09/why-greenhouse-gases-heat-the-ocean/ which claims that the observed ocean warming ...
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### Phase conversion of snow and ice due to irradiation versus melting

A few years ago another question touched on the relative rates of sublimation versus melting in terms of snow and snow pack disappearance. What was unusual about the answer is the huge range of ...
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### Is this a valid semi-diagnostic equation for Omega?

Beginning with the Primitive equations governing atmospheric motion for a dry gas, primarily the ideal gas law, and the conservation of mass and energy, neglecting diffusivity. $$P=\rho R T$$ \...
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### Why do buoyantly rising mantle minerals melt, yet buoyantly rising atmospheric waters condense?

In the mantle, minerals contained in buoyant plumes of rock undergo phase changes from solid to liquid (decompression melting). In the atmosphere, waters contained in buoyant plumes of air undergo ...
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### Sea Level Rise due to Climate Change

I've been trying to make sense of the argument surrounding sea level rise and not getting very far. Those who claim that Sea Level Rise is insignificant generally assert that we have been unable to ...
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### Elevation of Atmosphere differ?

Does the atmosphere depth (or how high the air molecules from the ground) of Earth or Mars differ gradually or can there be plumes of atmosphere that reaches into space? If I were able to travel a ...
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### Doesn't the sublimation rate on glaciers depend on the (specific) latent heat of sublimation of water ice?

On p. 6 of this article: Bliss, A.K., Cuffey, K.M., Kavanaugh, J.L., 2011. Sublimation and surface energy budget of Taylor Glacier, Antarctica. Journal of Glaciology 57, 684–696. There is an ...
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### Why is the pond in my backyard not frozen when it is -15 °C (5 °F) outside?

I am in O'Fallon, Missouri and today it is -15 °C (5 °F) outside. I was taught water freezes at 0 °C (32 °F). I could understand if it was exactly 0 °C (32 °F) that the water might not be turning to ...
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### First to Sail the Jet Stream Around the World

My questions are related to a scenario discussed on Earth Science: A huge (heavier-than-air) kite sailing in and out of the jet streams. The kite: The scenario: The assumptions: Such an airship ...
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### Is global warming being moderated by latent heat of melting polar ice?

I've only had a secondary education in physics, so bear with me, but with the greenhouse effect and all, wouldn't we be much hotter already if the ice melt-rate wasn't increasing, since more (heat) ...
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### Why does it rain more at night than during the day?

I'm living near a sea, and it rains mostly and heavily at night from 11 PM to 3 AM. The weather is mostly clear during daytime. Air is generally cooler at night, and cool air holds less moisture ...
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### The Role of the Antarctic Circumpolar Vortex & Ocean Current in Keeping Antarctica Frozen

An offshoot from the question how does Antarctica stay frozen? Do the Anatarctic circumpolar vortex and circumpolar ocean current play a role in keeping Antarctica frozen?
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### How does Antarctica stay frozen?

Antarctica receives heat from the Sun every day, so how does it stay frozen? I have some thoughts about the answer but I'm unsure of whether it is correct; I hope people here can clarify. My idea: ...
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