# Questions tagged [meteorology]

Meteorology is the interdisciplinary scientific study of the atmosphere.

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### Expanding the barotropic nondivergent potential vorticity equation: Which vector calculus property/identity to apply for dot product and del operator?

I am trying to expand the barotropic nondivergent potential vorticity (PV) equation [link] $$\frac{\partial \zeta}{\partial t} = -\vec{V} \cdot \nabla(\zeta + f)$$ where $\zeta$ is the relative ...
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### Formulation of the Moist Adiabatic Lapse Rate Equation

In the relationship r = ϵe/p−e: mixing ratio of the mass of water vapour to the mass of dry air. Question: What is ϵe For clarification see question Moist adiabatic lapse rate I know that the ratio ...
128 views

### What happens to the "curvature term" in the equations of motion for a rotating fluid near Earth's poles?

For a rotating fluid in spherical geometry, one of the terms of the equations of motion is the "curvature term". For example, for the zonal component of velocity (corresponding to eastward ...
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1 vote
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### Why does warm, moist air generate a low-pressure area? [closed]

In school, I learned the mechanism of high and low pressure areas, which roughly goes like this: In the tropics, the sun warms up the air during the day. Water evaporates, so that the air gets warm ...
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### How to explain "Vacuum Cleaner Effect" for upper level PV anomaly?

Recently I asked a question regarding PV Anomalies in Earth Science Stack Exchange: https://earthscience.stackexchange.com/questions/25478/how-to-explain-vacuum-cleaner-effect-for-upper-level-pv-...
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### Is angular momentum conserved on a spinning sphere, specifically Earth [closed]

Specifically in relation to meteorology. I was wondering if the angular momentum an object, lets say a parcel of air has due to the roation about the earths axis. Is it conserved if moved to a ...
1 vote
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### Forecasted temperature in the shade vs. theoretical 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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1 vote
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### Katabatic Wind: if the ground "radiates" it's heat during the night, why doesn't the air above it warm?

In this picture (from EasyPPL mock exam) and in a few other sources (e.g. https://www.britannica.com/science/katabatic-wind) it is stated that at night, the ground radiates heat and the air passing ...
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### How can flow along a stream line with constant pressure spatially change its velocity?

I'm going crazy: In meteorology there is a term "geostrophic wind". It is wind moving along surfaces of constant pressure. https://en.wikipedia.org/wiki/Geostrophic_wind How is the step from ...
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### How to calculate energy released by formation of frost on window during winter?

When the T ambient is low, we can see frost formation when the surface of window or surface is less than 0 degree C. But how to calculate the energy released during that frost formation at the window ...
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### Is there a molecular diffusion component to wind?

I'm thinking of vapor pressure from terrestrial water: A highly evaporating area in the ocean creates a volume of high relative humidity, the vapor tends to move to less humid air and by molecular ...
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### Does elevation change the temperature at which snow falls?

I have read that snow falls at 32 degrees F. While at an altitude of nearly 8,000 feet above sea level, I found it snowing, but the temperature was more than 40 degrees F. Perhaps the indicator is ...
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1 vote
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### What is the hygropause?

I've been reading on planetary atmospheres and I've encountered this term which I can't find defined anywhere on the web. What is the definition of Hygropause?
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### Size of a raindrop

Thinking about the fact that raindrops come with a typical size I was wondering how this can be determined. I am pretty sure that the friction with air and the quantity of water in the clouds are ...
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### Why does high pressure cause clear skies?

In high-pressure areas, air falls, but why does high pressure leads to clear, sunny skies?
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