Questions tagged [atmospheric-science]

The study of the composition or dynamics of the gaseous layers around planets, often applied to questions on Earth's atmosphere but can be applicable to all planets & moons in the solar system.

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3answers
33 views

On the Coriolis effect and weather

I learned in classical mechanics that the Coriolis Effect curves everything with speed to the right in the northern hemisphere and to the left in the southern hemisphere, my question is then why ...
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1answer
21 views

Dielectric constant change in the atmosphere?

I'm curious about the refractive index changing in the atmosphere. As I understand it (and I may very well be wrong/naive) when a ray of light enters from one medium into another, the electric field ...
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1answer
35 views

Is there a Coandă effect outside the atmosphere?

For example, when air is blown through a spoon in the atmosphere, the air flow bends toward the spoon. People say it's the Coandă effect. So, outside the atmosphere, when we let air blow through the ...
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1answer
41 views

Is the passage of lightning on a transmission line? [closed]

If so, then shouldn't lightning be reflected back into the sky everytime it hits the earth, due to an impedance change?
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4answers
62 views

How does sound change high in atmosphere? [duplicate]

There is no sound in space because there are not enough particles to transmit the pressure wave. But what about really high in the atmosphere where there is just a little air? Would sound move faster, ...
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1answer
59 views

Is it possible to destroy a typhoon by bombs?

When a typhoon is still on the ocean, if a big bomb or several bombs are thrown to it, maybe at the eye, or at the part where the wind circles fastest, can the bomb destroy the typhoon?
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0answers
265 views

What is the most likely cause for this strange lighting at sunset?

Yesterday's sunset was a little bit weird in several countries (Saudi Arabia, Egypt, Kuwait). Here's a video & picture, in case it wasn't clear enough it felt as if everything was being lit by a ...
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1answer
59 views

Direct Air Capture (DAC) of $CO_2$: Would a DAC mechanism run out of local $CO_2$ to convert?

Per Carbon Engineering's Website: Direct Air Capture (DAC). They claim to be able to remove 1 million tons of CO$_2$ per year with a single plant. My question is whether they needed to account for ...
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1answer
83 views

Does the atmosphere rotate slightly slower than the earth surface?

I often hear the vague explanation that the Coriolis Effect is why air rotates into pressure systems. That doesn't explain it for me though. Is pressure gradient directly toward the center of the low?...
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1answer
61 views

What is the speed of air molecule?

Given the minimal temperature measured in the Earth's atmosphere is not $0\space K$, air molecules are moving. I see no reason for air molecule to move all at the same speed. The question is ...
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2answers
99 views

How does the Earth's magnetic field protect it from the solar wind?

Several sources (see linked questions at the end) say that earth's magnetic field shields us from the solar wind. The general consensus is that without earth's magnetic field, the atmosphere would be ...
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0answers
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Pressure variance with height of the atmosphere-conflict of answers

When we use the standard equations pertaining to the International Standard Atmosphere to calculate the pressure at 25km above sea level, the answer seems way off from the values that we get over the ...
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0answers
47 views

Escape Velocity and its effect on the atmosphere

I’ve been doing some world building and wound up with a bit of a physics puzzle that’s stumped me. So rather than a long winded explanation I’ll simply state the primary parameters. Under otherwise “...
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1answer
59 views

Why sky is blue? [closed]

The major factor of different scattering is the ratio of wavelength to the size of particles which are working as microscopic scattering mirrors. In a sparse particle medium like air, the longer the ...
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1answer
56 views

Decrease in temperature due to radiation

Can radiation cause the temperature to decrease? Because, in my Physics textbook, it is written that: ln winter nights, the atmospheric temperature goes down. The surfaces of windowpanes, flowers,...
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3answers
136 views

Could the end cap of the Pascal B (1) survive its trip through the atmosphere?

In 1957, the US had a nuclear test where a shaft was dug 152 meters into the ground. A 100 mm thick, 900 kg steel plug was installed and welded at the top of the shaft. Under it was 2 feet of ...
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0answers
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In Feynman lecture vol1,chapter12 friction between two wet glasses, is there any atmospheric pressure related during the process?

In Feynman lecture vol1,chapter12 friction between two wet glasses, is there any atmospheric pressure related during the process? Does the water between two glasses make use of atmosphere pressure? Or ...
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1answer
45 views

Wind speed limit

According to Wikipedia, the highest wind speed not related to tornadoes ever recorded was 408 km/h. But I am wondering, what is the maximum theoretical wind speed possible here on Earth? It clearly ...
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1answer
56 views

How thick would the atmosphere have to be to block all the sunlight?

this is a question I haven't been able to find an answer to anywhere. How thick would our atmosphere have to be for the surface of the planet to be completely dark? Is that even possible? Thank you!
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4answers
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If the pressure inside and outside a balloon balance, then why does air leave when it pops?

Sorry for the primitive question but when we inflate a rubber balloon and tie the end, its volume increases until its inner pressure equals atmospheric pressure. But after that equality is obtained ...
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1answer
38 views

How would music sound in different atmospheres?

How different would a musical piece sound in different atmospheres? I assume that sound travels differently in other planets depending on what their atmosphere is made of, affecting the frequencies. ...
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1answer
40 views

What units are represented by pr - micrometer?

In studying column abundances, I often encounter the units $pr-\mu m$. What does this stand for? Part per micrometer? how can this be an abundance unit? Incredibility I cannot figure out what it ...
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1answer
34 views

Formation of Red and blue bands in the sky

Today at the time of sunset I saw this The sky is divided into two parts one In red and one in blue which are very distinctive Can anyone tell how? The upper part of the image points towards the ...
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1answer
36 views

Can a syringe be used as a hanging scale if needed?

FYI: This is not a homework q; I am just curious... You can assume that... the syringe tip cap creates a "perfect" seal, i.e., keeps air from flowing in/out! the syringe is completely depressed ...
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1answer
47 views

How is sound affected by gravity?

How would sound be different on a planet with a stronger gravitational field? My reasoning leads to sounds of the same wavelength having higher frequencies - is this correct?
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0answers
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How does the Torricelli barometer create a vacuum at the top of the tube? [closed]

Hi everyone! Can someone explain to me how does the Torricelli barometer creates a vacuum at the top of the tube? And how does it work?
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0answers
22 views

How many scattering events happen in the atmosphere over 1 km?

In Vector Monte Carlo Atmospheric Radiative Transfer Simulations, they take a Stokes vector, let's say [1,1,0,0] and multiply it with a matrix, with elements close to 1. But if there are much ...
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1answer
76 views

(Why) does wet air contain more oxygen?

I've heard the fact wet air contains more oxygen is the reason experts recommend to humidify the air. Intuitively, I'd say wet air should contain water of a greater density and thus, make less space ...
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2answers
44 views

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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2answers
69 views

What will happen to atmospheres of very large planets?

Our earth can hold our atmosphere whereas Mars cannot. So the atmosphere retention mass must be between the masses of Mars and Earth, but if mass is to be considered then can an iron ball having the ...
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4answers
93 views

Would a helium ballon pop or freeze in space?

I have read these questions: Why doesn't Helium freeze at 0K? Do objects in space freeze immediately? Now I do understand that a helium balloon cannot float up to space. But let's assume this ...
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0answers
15 views

What would earth's wind look like without differential heating?

If the earth were not subject to differential (solar) heating, but otherwise had the same atmospheric and surface temperatures, and same rate of rotation: What would its wind look like? E.g.: Would ...
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0answers
23 views

Whether below figure on atmospheric pressure is correct?

How conservation of energy is explained in the below figure? It seems atmospheric pressure in multiplication of Area(PA) is balanced by mg. If this is correct then if we take bigger diameter pot, the ...
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1answer
23 views

Is it possible to calculate the refractive index of a gas mixture given the pressure, temperature and wavelength?

I am searching for a formula to calculate the refractive index at a specific point in a planetary atmosphere. Given are pressure, temperature, wavelength and the molecular composition of the ...
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1answer
45 views

What is the pressure of water after entering atmosphere? [closed]

I was wondering if water exits from the pump and reach the ground, is the pressure of the water at the point of the ground be 0?
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0answers
30 views

Was torricelli right on atmosphere as energy to push mercury level up in barometer?

How below image can be explained in regard to Torricelli's logic on atmospheric pressure. Also, If we close the pot from the top and pressurize it to 1 kg/cm2 g, what happens with mercury level in the ...
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2answers
131 views

Does a helicopter that simply hovers remain in the same spot on earth? [duplicate]

Ignoring statistical variation in wind, will a helicopter that only applies force perpendicular to a perfectly sphere earth remain in the exact same spot relative to the earth? I am arguing with ...
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0answers
31 views

How much must the Sun's radiation be reduced to offset global warming?

About 70 % of earth is covered with clouds and the rate of atmospheric water vapor is increasing. Also the warming of the oceans will most probably cause more and deeper low pressures and increased ...
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0answers
13 views

Is it possible to detect the amount of CO2 in the atmosphere by observing Northern Lights?

From my limited understanding, the different colours observed from the Northern Lights is due to the presence of different gases in the atmosphere. Is it possible to observe the amount of CO2 in the ...
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1answer
80 views

What would happen to the water bodies if gravity ceased to exist on Earth?

If water stopped flowing (it would stop flowing downwards from mountains and all) then, would it start rising upwards? If it floats on the space ( I say space because there'd not be any atmosphere) ...
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2answers
49 views

Is the Earth Atmosphere Model at this NASA site wrong?

I've been trying to get a decent numerical approximation (curve fit) of Earth's Atmosphere Model, and found what I was looking for at this NASA's web site. However, when checking some basic ...
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2answers
91 views

What causes the color difference of lightning flashes?

Some flashes of lightning are seen in a blue shade while some have a yellowish/orange appearance .What is the possible cause of colour difference?
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4answers
3k views

What causes the direction of lightning flashes?

During a lightning strike, the flashes appear as cloud to ground or cloud to cloud. Why is this the only manner of propagation? Why do the flashes not go upwards from the clouds into the sky?
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1answer
58 views

Red colour of the Great Red Spot

In Wikipedia it is mentioned: "It is not known exactly what causes the Great Red Spot's reddish color. Hypotheses supported by laboratory experiments suppose that the color may be caused by ...
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1answer
58 views

Why the source function is equal to Planck function when we have a local thermodynamic equilibrium?

I understand that the source function $ S_λ $ for the special case of blackbody radiation is equal to the Planck function $B_λ $. However, in the broader case of a local thermodynamic equilibrium (...
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5answers
245 views

If atmospheric pressure is 76 cm of $\text{Hg}$ , why won't 76 cm of mercury stay in an open tube when suspended in air?

If we keep an hold a tube in air with the closed end up and open end downwards, containing mercury upto a length of 76 cm, why does the mercury not stay in place? Shouldn't atmospheric pressure exert ...
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1answer
67 views

quantum mechanical treatment of rayleigh scatterring

Is there a quantum mechanical explanation of light scattering by atmospheric gases? Classically, treating the atmospheric particles as excited dipole antennas, we know that the amount of scattering is ...
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2answers
57 views

How big would the moon appear with no atmosphere? [duplicate]

I know that atmospheric lensing is what causes the moon to look bigger on the horizon, but I assume this effect is still taking place when the moon is overhead too, albeit to a smaller effect. However,...
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0answers
17 views

Proper atmospheric laser propagation including reflections

I'm attempting to model the propagation of a laser beam (specifically, its beam radius) through the atmosphere, bouncing off a (curved) surface. This is fairly simple up to the surface itself, but I'm ...
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2answers
56 views

Can Mars have an oxygen atmosphere?

It is my understanding that, in its gaseous state, oxygen molecules move fast enough to achieve escape velocity. On Earth, we see this more clearly with helium. Regardless of what's happening on ...