# Tag Info

### 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. ...
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### 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 ...
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### 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: ...
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### 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 ...
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 ...
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### 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 ...

### 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 ...
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### How come the pressure/shock waves of an explosive volcanic eruption almost always fail to cause any damage?

Volcanoes are not bombs, they don't explode through a high explosive reactions, it more about dissolved gases being released from pressure. More like shaking up a coke can and popping it, spraying ...
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### 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:...
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### 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 ...
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### 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 ...
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### 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]. ...
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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 ...
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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 ...
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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 ...
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### 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 ...

### 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 ...
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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 ...
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### 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 ...
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### 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 ...
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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 ...
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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 ...
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 ...
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 ...
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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 $H=8 km=8000 m$ (...
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1 vote
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### 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 ...
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 ...
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