37 votes

What is the pressure at the center of the Earth?

It is the pressure gradient that is proportional to the local gravitational force. When that force is integrated over a distance, the pressure gradient is integrated to accumulate a total pressure. ...
Oscar Lanzi's user avatar
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14 votes
Accepted

What is the explanation of using pressure units (hPa) to express height when dealing with wind speeds?

There are several reasons. From the theoretical point of view it is beneficial to use isobaric coordinates, due to the vanishing density in the equations of motion. While in cartesian coordinates the ...
Joscha Fregin's user avatar
13 votes

What is the pressure at the center of the Earth?

The previous answers do a fine job already. But I'll try to add a simple thought experiment. Imagine three objects floating in space, clumping together by gravity: ...
stippi's user avatar
  • 231
9 votes

What is the pressure at the center of the Earth?

Pressure at the center of the earth is non-zero. You're correct that there's no gravitational force at the center of the earth, but that doesn't mean pressure is zero - the pressure comes from the ...
Nuclear Hoagie's user avatar
4 votes

When diamonds "migrate" from deep underground to the surface, do they maintain pressure inside when there is no more pressure outside? If so, how?

The question is in regard to pressure confining a rare, deep-mantle formed mineral visible within a diamond inclusion. The pressure on the inclusion within the diamond crystal is really the pressure ...
Thomas Perry's user avatar
4 votes
Accepted

Why should there not be water deep (e.g. below 6 kms) in the Earth's crust?

There are two reasons for this surprising finding: Compaction. Once you have high pressures at depth, the less dense material goes up. Take a bucket of water, put sand in it, and squeeze the sand ...
Gimelist's user avatar
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3 votes

ERA5 Single Level - Calculate relative humidity

Dew point temperature is the temperature where saturation water vapor pressure $e_s$ is reached. If we use an empirical formula for the saturation water vapor pressure, like the Magnus formula given ...
Joscha Fregin's user avatar
3 votes
Accepted

Do I understand pressure coordinates in the right way?

In pressure coordinates it is common to use $\omega$ as the vertical velocity component instead of $w$ as in cartesian coordinates. Obtaining the velocity components in the pressure coordinate system:...
Joscha Fregin's user avatar
3 votes

What is the pressure at the center of the Earth?

Imagine the whole ball being separated into a handful of concentric shells, with the outermost shell being the crust with the surface, and the lower shells ever deeper, hotter, and ghastly regions of ...
AnoE's user avatar
  • 131
3 votes

Why should there not be water deep (e.g. below 6 kms) in the Earth's crust?

Nothing really prevents water from existing deep inside Earth. We have direct evidence that it does, even in the mantle. Evidence for such water may be found in Ice VII inclusions in diamonds[1]. ...
Oscar Lanzi's user avatar
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3 votes
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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
Accepted

When diamonds "migrate" from deep underground to the surface, do they maintain pressure inside when there is no more pressure outside? If so, how?

One of the more interesting examples of diamond maintaining high pressure in its lattice is discussed in this answer from Space Exploration SE. Put briefly, Ice VII inclusions have been found in ...
Oscar Lanzi's user avatar
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2 votes
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Extent of desert area influence in local climate

The mediterranian do in a way create its own climate and is partly protected from the north saharan desert by the dominating wind direction in the area. The dominating wind direction is from west and ...
trond hansen's user avatar
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2 votes
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How much does the weight of urban structures (buildings) affect the compaction (permeability, porosity, density) of alluvial sediments below a city?

This question might be more appropriate for the SE Engineering site. The thing about soils is that they vary from place to place. Some are sandy, some contain more clay than others and the ...
Fred's user avatar
  • 24.7k
2 votes

Could someone please validate the Holmes equation

There is no such thing as the 'Holmes' equation. Comment: Holmes is the person that formulated this equation I has every right to name it as I please. Could someone please validate the Holmes ...
AtmosphericPrisonEscape's user avatar
2 votes
Accepted

What is the relationship between air pressure and temperature?

Or if the math of the other answers is a bit complex, in a broad sense, the balancing relationship is: $$\frac{\mathrm{density} \cdot \mathrm{temperature}}{\mathrm{pressure}} = \mathrm{constant}$$ For ...
JeopardyTempest's user avatar
2 votes

Air pressure, fronts and temperature

Well, to start with, air does not strictly go from high pressure to low pressure. For example, in geostrophic balance winds will move perpendicular to the pressure gradient. Fronts form in a process ...
BarocliniCplusplus's user avatar
2 votes
Accepted

Is there superionic ice in the earth? and how did it get there?

Probably not. While the interior of Earth easily exceeds the 40 GPa pressure required to make superionic ice and we know now that tectonic processes can cycle water deep into the mantle, the ...
Oscar Lanzi's user avatar
  • 3,826
1 vote

Atmospheric pressure: intra-day time series

Perhaps you would want to point your attention towards crowdsourced data, e.g. data from vehicles, smartphones and private weather stations etc. Unless you can get direct access to raw output from a ...
Whir's user avatar
  • 451
1 vote

Why does warmer maritime air create low pressure systems while continental land masses create high pressure systems?

I ended up asking him directly: It's a bit of a simplification of what happens. You can picture a large column of air stretching into the sky. To a first approximation, we live an equal pressure ...
Andrew Andrade's user avatar
1 vote

What is the relationship between air pressure and temperature?

Compression and expansion of an ideal gas is an adiabatic process, i.e. the entropy $\rm (P\rho^{-\gamma}) = const$, where $\gamma$ is the adiabatic constant. You can rearrange this using the ideal ...
AtmosphericPrisonEscape's user avatar
1 vote
Accepted

Why should wellbores be supported by pressure, but not mine tunnels?

Drilling mud is only used when drilling for fluids that are pressurized such as oil, gas and sometimes water. It is not used when drilling for minerals such as gold, iron ore, copper. Exploratory ...
Fred's user avatar
  • 24.7k
1 vote

How to calculate rate of change of temperature with pressure in Earth's troposhere?

Wow, @John came with a simple answer. Our goal is to find $$\frac{dT}{dP}=\frac{dT}{dz}\cdot\frac{dz}{dP}$$ By the equation for pressure lapse: $$P=P_0\cdot e^{-\frac{z}{H}}$$ where $H=8 km=8000 m$ (...
User123's user avatar
  • 638
1 vote

Is surface temperature relevant for the creation of high- and low pressures areas?

Your logic is wrong. Do not think of the atmosphere as a closed system. Your analogy of heating a bottle is not appropriate. In uncomplicated terms, the Sun heats the ground, the ground radiates ...
Fred's user avatar
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1 vote
Accepted

What would happen if the inner core bulged and moved a tiny bit?

The following paragraphs are reproduced from https://www.nationalgeographic.org/encyclopedia/core/ "Growth in the Inner Core As the entire Earth slowly cools, the inner core grows by about a ...
essential555's user avatar
1 vote
Accepted

How to predict when the pressure will change

Predictability of weather and climate is currently an active and lively research topic. I will try to giove some (very) brief information on how it is normally done. The best idea would be to use a ...
ouranos's user avatar
  • 617

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