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Questions tagged [air-currents]

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1answer
135 views

When it is said that air moves from warm object to a cold object, how is it possible that air moves from high pressure area to low pressure area?

By air moving from high pressure area to low pressure area means that it's moving from colder area to a warmer area, are they both not contradictory? I might have understood something in a wrong way, ...
5
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0answers
84 views

What level of heat creates a dust devil?

My understanding is that a dust devil is created when heated air rises rapidly displacing the cooler air above up. My question is, how relatively hot does the patch of air on the ground have to get in ...
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0answers
65 views

Theorist speculate about dozens of loud atmospheric booms across globe

Theorist speculate on the dozens of loud atmospheric booms across globe. Has any recognized institutions offered a plausible explanation as of now?
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0answers
58 views

Is the Hadley cell a problem for the air mass?

I was lately studying how air masses are generally formed. I came to know that as the warm air rises up and then cools down as it moves above, after some time, a whole cold mass of air is accrued near ...
3
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2answers
150 views

Land's effect on winds and currents?

If we did a thought experiment and imagined the Earth to be covered in a global ocean (ie. no land to slow winds or direct ocean currents) would winds and waves be perpetually enormous or would they ...
4
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1answer
104 views

Can we extrapolate wind speed data to higher altitudes?

I have some data (GRIB layers) about wind components u and v, which I would like to use to estimate wind magnitude and direction. But the model says it is for 10 m altitude. Is there a way to ...
2
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1answer
5k views

How to identify low or high pressure area

If rain is due to the flow of humid air from a high pressure area to a low pressure area, without the use of devices, technology or mass media is it possible to detect regions of high or low ...
3
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2answers
157 views

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 ...
2
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2answers
3k views

How long does it take air to circle the world?

I live in New York and I am investing in a carbon offset program in Korea to decommission a coal electricity generation plant. Will I ever breathe the cleaner air as a result of that project? And how ...
5
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2answers
415 views

About an alternative type of wind energy facility

Many people seem to complain about large wind farms. Instead of all that, there are many cities with all their tall buildings that actually 'magnify' the wind or augment it. Even corridors through a ...
1
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0answers
101 views

Sailing Around the World on a Jet Stream

An ultra light plane can stay in flight up to 2400 km (the World Record) with out an engine using thermal lift. Can a huge kite like airship (not a blimp) be built to indefinitely sail in and out of ...
9
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3answers
753 views

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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2answers
281 views

Appearance of Tornado

Does the appearance of a tornado come from the dust or is there some characteristic of swirling wind? Additionally many experiments shows a tornado-like phenomena in a jar of water, is this possible ...
13
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3answers
2k views

Intuitive definition of the Monin-Obukhov length?

The Monin-Obukhov length (L) is defined as: $$L = - \frac{\rho C_p T_v u^3_*}{kgH}$$ where $\rho$=moist air density; $C_p$=air specific heat capacity; $T_v$=virtual temperature; $u^3_*$=wind ...
19
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1answer
5k views

Where does wind come from?

Wind is (according to Wikipedia) the flow of gases on a large scale.On the surface of the Earth, wind consists of the bulk movement of air. What forces would cause such a mass movement of air?
23
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2answers
1k views

What is the cause of the jet streams?

Jet streams are fast-flowing currents of air in our earth's atmosphere. An enormous amount of energy is necessary to keep a jet stream going. Where does this come from and why?