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
4 answers
103 views

What am I doing wrong in this estimation of the mass of the atmosphere?

I'm trying to approximate the mass of the atmosphere. I'm treating it as an ideal gas and therefore its density follows: $$\rho(z) = \rho(0)e^{(\frac{-mgz}{k_BT})}$$ Where I'm using $m=4.2122\cdot10^{-...
agaminon's user avatar
  • 1,637
6 votes
1 answer
401 views

Does gravity slow down sound (does sound travel faster downwards than upwards)?

I have read this question: So assuming the heavier planet has the same atmosphere as Earth, and that we can treat the atmosphere as an ideal gas, the speed of sound on the heavier planet would be the ...
Árpád Szendrei's user avatar
0 votes
1 answer
57 views

Refraction of light from the earths atmosphere

If a beam of light is propagating through the earths atmosphere is heading towards space, and is moving from a medium with a refractive index of n1 =1.000293 to a medium with a refractive index of n2 =...
Tlotliso's user avatar
1 vote
1 answer
122 views

Aurora Borealis

As we know that during a solar flare, a large number of electrons and protons are ejected from the sun. Some of them get trapped in the earth’s magnetic field and move in helical paths along the field ...
unabdriged's user avatar
0 votes
5 answers
1k views

Does Atmospheric Pressure Affect Weight Of Objects

The atmospheric pressure is around 100KPa which is 100,000 N/m2. If the gravitational acceleration is g = 10 m/s2, then it would be around 10 tons of weight of air per square metre! Let's say that we ...
Yitian Chen's user avatar
0 votes
0 answers
51 views

How are these expressions for blackbody spectral energy density established?

My first question regarding the following is: given that it is very close to 1 in the atmosphere, do we really need to consider the index of refraction in this context? In the article Radiation and ...
Steven Thomas Hatton's user avatar
0 votes
0 answers
40 views

Production of Nitrogen Vacancy Centers

A Nitrogen Vacancy Center is a diamond defect in which a carbon atom is replaced by a Nitrogen and the adjacent carbon atom is replaced by a "vacancy", hence the term Nitrogen Vacancy (NV). ...
rb3652's user avatar
  • 165
1 vote
2 answers
79 views

What is the maximum flux of 1 GeV stably-trapped protons in Jupiter radiation belts?

And in which L-shell? This graph shows a flux of around 50 stably-trapped protons per m2 per sec on Earth, and I have read it's higher in Jupiter but I can't find the value. A source would be ...
user avatar
1 vote
0 answers
33 views

Can aurora (the geostorm) cause increased static electricity on the ground?

There was a G-1 storm last night and I had major static while taking off clothes, far more than usual. It was a clear night here not foggy like most places.
Alison B. Lowndes's user avatar
0 votes
2 answers
72 views

Can we witness Optical illusion in which sun appears to set in mid sea than at horizon?

I was searching for optical illusions and came across a video on youtube where sun seems to set in the mid of sea instead of setting at the horizon? Can anyone please explain how this illusion takes ...
Shinnaaan's user avatar
  • 1,219
20 votes
3 answers
2k views

Why is it so dark during a solar eclipse?

At a total solar eclipse the sun is barely covered, like right after sunset. So why is it much darker than right after sunset (which allows us to see the corona)?
George Lee's user avatar
2 votes
1 answer
171 views

Does the global oxygen levels drop during winter months? [closed]

I had a thought while I was trail walking the other day and no one could provide a clear answer. In the winter months, most of the plants are in hibernation mode. Having lost their leaves they are ...
BirdMan's user avatar
  • 29
1 vote
1 answer
65 views

Mechanism of structure of atmospheric lightning

Lightning is a natural atmospheric phenomenon.From early childhood years we all are familiar with the concept of lightning.But recently,from a website named Z T RESEARCH,i came across the fact that ...
Sohini Roy's user avatar
3 votes
2 answers
261 views

At what speed would a wind affect a bullet? [closed]

Firing a gun loaded with the fastest bullet (.220 Swift 1,422m/s or any bullet that is super fast and excellent aero dynamics) in a close range (2cm) from the tip of an air blower. What would be the ...
Hither Joe's user avatar
20 votes
4 answers
9k views

Does the amount of oxygen in air, actually get lower as you go to higher altitudes?

I have heard that there is less oxygen as you go higher (that's what my teacher told me). A reason that supports that is, as you go to higher altitudes, it becomes more and more difficult to breathe. ...
Ishaan Manish's user avatar
0 votes
0 answers
29 views

Temperature-Humidity-Wind (THW) index for hot and cold weather [duplicate]

Does anyone know the formula (or the algorithm, even a fortran code) to calculate the Temperature-Humidity-Wind (THW) index not from the heat index but in general? (someone published a (too simple?) ...
ifffam's user avatar
  • 1
1 vote
1 answer
102 views

Why ozone is found so high up in atomosphere?

I don't know if this is right place to ask this question but its bugging me for a while. Quick Google search gives me values of density ($kg/m^3$) of some normal gases: $O_2 (1.429), N_2(1.1651), CO_2(...
Kshitij Kumar's user avatar
0 votes
1 answer
73 views

Why it doesn't rain in winter much like summer(central asia)? [closed]

Why doesn't it rain in winter much like summer ( in Central Asia)? Although during winter water vapor in atmosphere should condense more to get precipitation?
Suresh Chandra Pal's user avatar
0 votes
1 answer
31 views

What actually happening in land breeze?

From childhood we are taught about land breeze and sea breeze , but I always had a doubt. Look at diagram Book just say " air above ocean become warm so it rise up creating a low pressure zone ...
Suresh Chandra Pal's user avatar
1 vote
1 answer
193 views

Criteria for Kelvin-Helmholtz Instability

I am presently engaged on a project to model elements of the behavior of Jupiter's atmosphere. I have been given by my authority some readings on fluid dynamics to raise awareness for the code. ...
Dosuw's user avatar
  • 13
2 votes
1 answer
399 views

Blue sky and Red sunset, Why? [duplicate]

I tried several resources for understanding this phenomena, but none of them were satisfying. I'll citate one from wikipedia (others were also similar): Blue light from the sun is scattered more than ...
Lasha Bukhnikashvili's user avatar
3 votes
1 answer
126 views

Falcon 9 exhaust color

We've seen quite a few Falcon 9 launches over the last years, but couple of days ago (at the NASA DART / Falcon 9 launch from Vandenberg SFB at 10:21pm local time, on Nov 23) we noticed something that ...
Alexander Avtanski's user avatar
0 votes
0 answers
76 views

Any lecture notes or easy explanation of Holton's Meteorology?

I am struggling with understanding Holton's Dynamic Meteorology. Any lecture notes based on the book with easy explanations will help.
1 vote
0 answers
24 views

What determines the Earth's atmospheric transmission window?

That is, the opacity/transparency spectrum for electromagnetic radiation.The ionosphere plays a big part but is that due to the composition of ionospheric plasma(not to mention the plasma frequency)? ...
Mr X's user avatar
  • 427
1 vote
1 answer
81 views

Predicting drag or drag coefficient?

Would it be possible to mathematically predict what the drag on free-falling object will be in 10 seconds (for example), if you know the current altitude, velocity and pressure? I know you can ...
Apollo's user avatar
  • 11
3 votes
1 answer
586 views

Does our blue sky also scatter UV or just visible blue?

I'm wondering if I should wear sunscreen or UV sunglasses when exposed to only blue sky, such as working in a room with large windows that let in a substantial area of blue sky. Then, I wondered if ...
Doug Null's user avatar
  • 193
0 votes
1 answer
213 views

What will happen when a gas cylinder is taken to space (vacuum)?

Inside the atmosphere, I guess the atmospheric pressure negates the pressure exerted by the gas that's inside a gas cylinder. However, when taken to a vacuum (space), Will the gas cylinder burst due ...
tryingtobeastoic's user avatar
65 votes
3 answers
9k views

Do sunrises and sunsets look the same in a still image?

A question that popped into my head: if I see a picture of the sun close to the horizon, in an unknown place, can I know if it was taken at sunset or sunrise? Do sunrises and sunsets look the same in ...
AlonMln's user avatar
  • 633
0 votes
0 answers
29 views

How do I set up surface pressure as function of time due to atmospheric erosion by Solar wind?

It is known that highly energetic particles from the sun when striking a planet ionize the atmospheric particles and the ions may escape the planet by being guided by the solar magnetic flux that ...
SolidMark's user avatar
  • 263
3 votes
2 answers
280 views

Why is air considered to rise adiabatically?

Do air parcels not push against other air and do work on them? When air molecules within an air parcel bump into air molecules outside the air parcel do they not transfer energy to them?
mudpuppy's user avatar
-6 votes
2 answers
129 views

Are air particles massless? [closed]

so as the question suggests, I wanna know whether an air particle has mass or no. Thank you!
Beatrixx's user avatar
1 vote
0 answers
65 views

How does this effect happen? [duplicate]

I searched about this and I did find that it's like the effect you have on train tracks or roads (that they appear to be going to converge at a point), but doesn't that only happen when the object ...
danilo's user avatar
  • 11
0 votes
1 answer
495 views

Why does water in the glass enter the straw?

Suppose you have a glass filled with water. Now you insert a straw in that glass. Is the air pressure inside the straw greater than the atmospheric pressure on the water outside it?(I think it is ...
ACRafi's user avatar
  • 801
1 vote
2 answers
491 views

Rain drop equations

Motivated by this question, I am thinking about describing a rain drop beyond the elementary physics. The principal improvement, it seems, would be accounting for the drag force dependence on the size ...
Roger V.'s user avatar
  • 58.4k
-1 votes
1 answer
51 views

Modelling sky type as an area light source [closed]

I have a trouble understanding the mapping going on here. The author asserts that sky types can be modelled as follow : The first one appears to represent a clear sky view, the second is more of an ...
SPARSE's user avatar
  • 113
0 votes
0 answers
146 views

How does air pressure affect the ability to create a frequency and which frequency is least attenuated

From $I=ξ^2ω^2cρ$ where ξ is the particle displacement, ω the frequency, c the speed of sound and ρ the density of the medium (1, 2), I understand that for the same frequency and amplitude the sound ...
David M's user avatar
0 votes
1 answer
59 views

What would happen to atmospheric vapour if the amount of condensation cores decreased?

Some rain is said to form from atmospheric vapour around dust particles from sand storms, smoke etc. What would happen with the vapour if condensation cores decreased in amount?
David Jonsson's user avatar
2 votes
2 answers
55 views

What determines handedness of wind circulation around pressure extrema in the atmosphere?

I'm reading a textbook (Atmospheric Science - An Introductory Survey 2nd ed, John M. Wallace • Peter V. Hobbs) which states (p14): The winds observed in the Earth’s atmosphere closely parallel the ...
jeremy_rutman's user avatar
0 votes
1 answer
858 views

What is air pressure and is it the same as atmospheric pressure?

What is air pressure and in particular is it the same as atmospheric pressure? Can the terms be used interchangeably, and why are there different instruments to measure the two properties?
Koket Fikru's user avatar
0 votes
1 answer
314 views

Scattering of light by gas molecules in Atmosphere, responsible for sky's blue color? [duplicate]

What do we mean when we say gas molecules in air scatter sun light (more blue)? Do they reflect sunlight? Is beam of sunlight falling on one molecule and each rays got reflected into different random ...
user avatar
0 votes
1 answer
42 views

Possible to communicate visual messages over long distances using telescopes and mirrors? [closed]

A thought experiment question: From both a theoretical and engineering standpoint, would it be possible to transmit visual messages over long distances on the surface of the Earth via a series of ...
RobertF's user avatar
  • 179
13 votes
2 answers
587 views

Why does sunset spread over the horizon?

Why does sunset light spread horizontally over the horizon, instead of being radially spread around the solar disk? I understand physics about refraction, and wavelength, and gradient difference ...
Dmytro Brazhnyk's user avatar
30 votes
3 answers
4k views

Is a westward flying plane heavier than an eastward one?

I understand that you weigh less at the equator due to the increased centrifugal force. From my understanding, the faster you circle the Earth, the less your effective normal force you would feel, up ...
Max's user avatar
  • 545
22 votes
5 answers
3k views

Why do X-ray telescopes have to be in space?

I have read this question: For x-rays the (HUP limit) Δx becomes smaller than the distances between the lattice distances of atoms and molecules, and the photon will interact only if it meets them on ...
Árpád Szendrei's user avatar
13 votes
3 answers
4k views

What is different in the morning sunlight so it doesn't produce as much electricity as at noon?

Consider I have a solar panel setup as in the above picture. The top sketch is sketching sun rays in the early morning around 6 AM in a clear bright sky. The bottom sketch is sketching the sun ray ...
AirCraft Lover's user avatar
0 votes
0 answers
53 views

Atmospheric scale height

In researching atmospheric scale heights I have found that Earth’s atmospheric scale height quoted as both 8.5km and 0.000139m-1. I understand the significance of 8.5km and the natural log but I am ...
Adam Crickmore's user avatar
1 vote
1 answer
133 views

Understanding Convectional Rainfall

Consider the following explanation of convectional rainfall given in a VII grade textbook. When air comes in contact with the hot surface of the earth, it gets heated, becomes light and rises in the ...
Lost's user avatar
  • 1,421
0 votes
0 answers
192 views

How fast does methane rise in atmosphere?

Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially, is equal to the weight of the fluid that the body displaces. If ...
SamFisher83's user avatar
0 votes
1 answer
588 views

Conversion of Mass mixing ratio (MMR) to Volume mixing ratio (VMR) and Dobson Unit?

I am trying to convert MMR to VMR and then convert VMR to Dobson Unit (DU). I used three different methods but I get bizarre values. I used the following method to convert to Dobson Conversion ...
Dipu's user avatar
  • 103
1 vote
3 answers
55 views

Space pump hydroelectric [duplicate]

I'm in the need of some help here. I'm an artist and I want to paint digitally something that can have an use for the future of humanity. I would like to create an illustration about a futuristic ...
Alenz's user avatar
  • 11

1 2 3
4
5
24