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.

Filter by
Sorted by
Tagged with
0
votes
1answer
24 views

Velocity vs. Time for ICBM [closed]

A velocity, altitude, and downrange distance vs. time profile for a typical ICBM would be helpful to me. Particularly velocity vs. time. General descriptions, basic principles, and design ...
2
votes
0answers
17 views

Why hot air cools off when it rises and expands? [closed]

I know that when air is heated it will have a high temperature that leads to high kinetic energy of particles,high pressure, low density. But, why when hot air rises and expand they get cold ? ...
0
votes
1answer
28 views

If you were to fire a laser or maser into space, how much of its energy would be lost to the atmosphere?

I'm very interested in knowing about how much energy would be lost to the atmosphere if you fired a laser or maser into space. I know the laser would probably diverge quite a bit over that distance, ...
-1
votes
2answers
41 views

Air Pressure & Atmospheric Pressure

I know that when air is heated it expand, and thus it makes density decrease, pressure increase, and temperature increase. But, why hot air cools off when it expands and rise ? Please answer with a ...
0
votes
0answers
22 views

Best Resources for Learning Mathematics Behind Weather Forecasting

Anyone know what the standard texts and papers are for understanding how modern ie numerical weather forecasting is done?
1
vote
2answers
45 views

By what mechanism does a solar flare overload electronics?

I apologize for my ignorance, but I lack the underlying knowledge to meaningfully research this myself. My knowledge of both Solar Flares and EMPs comes almost exclusively from pop-sci reading. I've ...
3
votes
1answer
42 views

where do the gases such as hydrogen and helium end up after leaving the earths atmosphere?

I've heard that gases like hydrogen and helium leak out of the earth's gravity a little by little. but where are they going? where do they end up after leaving earth's pull? would the sun pull them ...
0
votes
2answers
35 views

Fluid Dynamics and Pressure Difference

We all know that air is a fluid as it can blow and we say that the cause of this blow is pressure difference but my question is what creates this pressure difference? Is it related to Earth's motion ...
0
votes
0answers
6 views

Tropical Cyclone Boundary Layer

A tropical cyclone moves over the ocean before making a landfall. So, when we talk about the boundary layer of the tropical cyclone (TC) at a point, is it actually the marine atmospheric boundary ...
0
votes
0answers
74 views

If Earth were to be ejected from the solar system, would geologic functions slow, halt, or continue?

I tried asking this question of the Science Fiction and Fantasy stack exchange but they told me to come here. I just got done reading Philip Wylie's When Worlds Collide and was curious about some of ...
1
vote
1answer
90 views

Math behind helium balloons lifting objects to (almost) space

So I've seen those big helium balloons that are not even filled all the way up, but they still manage to reach heights of up to 30 km. I think they're mainly used for research and etc. Furthermore, I ...
3
votes
1answer
39 views

Why do all heavier gases in the atmosphere not settle down to the surface? [duplicate]

Some pollutants heavier than air that are released into the atmosphere include $\text{CO}_2,\text{SO}_2,\text{SO}_3,\text{NO}_2$ etc. Since these gases are heavier than air, Why do they not settle ...
0
votes
0answers
4 views

How to calculate thermobaric heating and decelleration when object go from space into atmosphere (2D)

I'm making 2D game where ship landing from space to planet. I want to add atmosphere to planets with gradient density depending on height. And I want to use this atmosphere for converting object speed ...
1
vote
1answer
33 views

Function of solar radiation spectrum

I want to calculate the area under a curve between 250nm to 300nm to find the irradiance in [W/m2], to do this I think must find the function of Spectral Irradiance (sunlight out the atmosphere, ...
0
votes
0answers
20 views

How to calculate air density at altitudes higher than 86km?

Barometric formula is fit up to 86km. Is there a sufficiently nice approximation for what happens above (e.g. thermosphere where molar mass isn't constant anymore)? I understand air is much thinner ...
0
votes
0answers
13 views

What would be a beginner's book on radiative transfer?

I want to learn the basics of radiative transfer for my reasearch, which is on planetary sciences. I am looking for a book that would give me the basics of radiative transfer (the mathematics involved)...
0
votes
1answer
23 views

Does night sky cooling need clear sky and why

I think I understand what radiative cooling is in general. Each body which is at a non absolute zero temperature would emit electromagnetic waves and loose energy. Now when it comes to night sky ...
0
votes
1answer
29 views

Why does a water bottle contract after I put it in the fridge, then expand when I open the lid?

Whenever I finish a drink of water bottle, I screw the cap back on the plastic bottle and put it in the fridge. The next time I unscrew the cap, even just a little bit, the bottle expands as if the ...
0
votes
3answers
56 views

Why does the increase in atmospheric pressure crush this empty bottle?

I'm trying to understand how atmospheric pressure works. Please have a look at this picture taken from Wikipedia. Because this empty bottle was sealed at a higher altitude, the pressure crushes it ...
3
votes
1answer
40 views

Electricity in the atmosphere: effect on human body and on electric components

there are many topics on the web (for instance this, or this famous lecture) about this topic, but I do not understand some basic concepts. The statement from which I want to start is this (taken ...
0
votes
1answer
25 views

Assumptions when proving that two saturated air masses mix to form supersaturated conditions using Clausius-Clapeyron

Problem from an assignment: Prove that two saturated air masses of temperature $T$ and $T+{\Delta}T$ mix to form supersaturated conditions using the Clausius-Clapeyron relation: $\Large\frac{...
0
votes
0answers
40 views

What is a simple explanation for how to solve this simplified raindrop fall problem?

This is a problem for an atmospheric science class, but my question is physical in nature: A raindrop with an initial radius $r_i$ evaporates while falling through the atmosphere. Its ...
2
votes
1answer
57 views

Why can atmospheric re-entry heat up the air into plasma?

The adiabatic processes of re-entering earth from a spaceship, creates intense heat. Heat in the range of 1700-2000 degrees Celsius. I've read the the temperature in the air molecules generate a ...
0
votes
0answers
27 views

Why particles stay suspended in the air and seems separated from the other layers of the atmosphere?

Example: in the following image: you can see that particles are suspended at a certain height, but they don't keep floating beyond - like, a ballon (best comparassion I can make). I wonder what are ...
0
votes
0answers
24 views

Create cloud lightning in laboratory

Has ever been attempted (or is it at least possible) to recreate lightning phenomena in laboratory? To be clear, I do not mean to simply create a large current which mimics the currents observed in ...
1
vote
1answer
31 views

Hydrostatic balance in light of temperature changes

By the principle of hydrostatic balance, the atmospheric pressure $P$ at surface level is such that a column of air with cross-sectional area $A$ and mass $m$ satisfies $$PA=mg$$ If the temperature ...
1
vote
0answers
34 views

Why do sun light rays that come through clouds not look parallel, despite it being so far? [duplicate]

I was at the airport last friday and there were some nice sun light rays, although not much of a good spot to take a picture. What weirds me out every time I see them is that they look as if coming ...
4
votes
2answers
792 views

Why doesn't Rayleigh scattering happen at low altitude in air?

An answer I found online was: At high altitude where molecules are far apart, scattered photons can travel without interfering with each other, thus they fill the sky with blue light. But at low ...
0
votes
1answer
41 views

Calculating the Mass of Earth's Atmosphere

I am trying to solve the problem below: Calculate the mass of the Earth's atmosphere given a mean pressure at the surface of $1.013\times 10^5$ Pa and $g=9.81$ m/s/s. I have been provided a hint ...
0
votes
0answers
28 views

Are impacts in outer space more powerful than on Earth? [duplicate]

Is an impact less destructive on Earth than on other planets with no atmosphere, given that the momenta, factors like the line of impact are identical in both cases? If yes, then is it because there ...
0
votes
0answers
56 views

Why doesn't the atmosphere separate according to density? [duplicate]

Why don't dense gas elements sink to the ground and dense gas elements drift to the sky? Why don't we have layers of oxygen, nitrogen, carbon dioxide, etc.
-5
votes
1answer
88 views

How to acquire Dark Matter? [closed]

I want to acquire some Dark Matter as is mentioned in this paper and I have two questions: Is it possible to use helium balloon to reach to the Dark-Matter-sphere? What type of ceramic or other ...
0
votes
0answers
20 views

Generating power with a “straw” to space… Is it possible? [duplicate]

Imagine you have a straw in a glass of water. If you put a turbine inside it somehow and move the glass, pour water in and out of it etc, you would see the water level rise and fall, and the turbine ...
4
votes
0answers
57 views

Why is the sky lighter than the ground in this infrared image?

I asked a question on biology SE as to the weird appearance of hippos in thermal imaging and in a comment @uhoh pointed out that in the image from this video that shows an example, the sky and trees ...
2
votes
2answers
560 views

Difference between primary and secondary rainbow

A secondary rainbow is dimmer than a primary rainbow. A primary rainbow is seen as a result of two refractions and one total internal reflection. A secondary rainbow is seen as a result of two ...
3
votes
1answer
32 views

How does water vapour replace air molecules?

I know that density of moist air is less than density of dry air becuase water molecules replace air molecules, and hence as the average molecular mass of water is less than that of air, the density ...
4
votes
3answers
433 views

Can anyone explain the REAL reason why CO$_2$ increases global temperatures (not the simplistic greenhouse analogy provided for public consumption)?

The greenhouse effect analogy of global warming is that atmospheric carbon dioxide CO$_2$ absorbs some of the infrared radiation emitted by the Earth, and redirects a portion of that radiation back ...
1
vote
0answers
53 views

How much is Germany blocking wind with its 60GW of windfarms? [closed]

Just curious question. Is Germany blocking wind with its 60GW of windfarms? Does it have any influence? Germany has total 60GW (installed electrice power) of windfarms. Including efficiency, its like ...
1
vote
0answers
36 views

Bottom orbital velocity during a typical typhoon

What is the wave orbital velocity generated during a typhoon? I cannot find direct measurements, so hoping to find a way to calculate this. In other words: How do I get from wind speeds of 12 on the ...
0
votes
0answers
29 views

What is responsible for colour of sky seen from ground vs space?

If short wavelength of light such as blue and violet scatters more by air molecules in our atmosphere at noon time along the equator but our eyes can only see the blue sky due to biology, then what ...
2
votes
2answers
77 views

Why don't we see the violet in the rainbow as blue?

I understand that we perceive the sky as blue and not violet because (1) sunlight has more blue than violet in it (see here), and (2) our eyes are more sensitive to blue than to violet. However, I ...
0
votes
2answers
66 views

Does atmospheric pressure determine gravity

If all the air were removed from a room creating a vacuum, would an object be weightless?
2
votes
0answers
104 views

Why do rain clouds form in the first place?

Thought process leading to the question It's cold over here in India and I noticed that while breathing out some cloudy thing comes out of my mouth (I found it is called EBC (Exhaled Breathe ...
-2
votes
1answer
64 views

An interesting query about gravitation [duplicate]

If a helicopter flies linearly in the upward direction from a point A on the earth stays in the air at the same position for a long time and then linearly comes down , will it land at the same point A ...
-1
votes
1answer
56 views

Why is Methane a more effective greenhouse gas compared to Carbon dioxide? [duplicate]

Over 100 years, Methane has a Global warming potential 34 times bigger than Carbon dioxide. Over 20 years, it's even 86 times bigger. How does one arrive at these numbers? Looking at the following ...
6
votes
3answers
291 views

Why is there a “blue hour” after the “golden hour”?

There's a great story about why the sky is blue during the day, and turns golden during sunsets: Rayleigh scattering affects blue light more. During the day, blue light from the Sun is scattered ...
0
votes
0answers
62 views

What will limit Santa's top speed in traveling between two major cities on opposite sides of the planet?

My school is hosting a family night, and the math department has charged me with setting up a booth where visitors can grab a yard stick and a world map and, given Santa’s top speed, calculate how ...
2
votes
0answers
45 views

Is our atmosphere declining?

While studying about Maxwell-Boltzmann distribution (through a chemistry textbook) I came across the fact that molecules can posses any speed (lower than $c$). This makes it obvious that there are ...
2
votes
2answers
157 views

Follow up question of “Why does atmospheric pressure acts on us?”

This question is a follow up question of this one. . I saw the answer by user Thomas Fritsch and he says Actually your head only feels those air molecules which are directly hitting the surface of ...
17
votes
9answers
4k views

Why does atmospheric pressure act on us?

I have a bit of misconception about weight which I want to clarify. The air pressure is explained as the weight of the air column above our head acting per unit area. But since air is not continuous ...

1
2 3 4 5
18