Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

0
votes
0answers
31 views

How fast would the Earth have to spin to lose the atmosphere?

I have read these questions: How fast would the Earth need to spin for us to feel weightless? Why can't we feel the Earth (or being in any non-inertial frame) rotating? And it made me curious....
0
votes
2answers
59 views

Why does purple appear in a rainbow?

It is said that people and digital cameras have color sense only for red, green and blue. So when we see violet/purple in a rainbow, whether with our eyes or in a photo, we should be seeing a color ...
0
votes
3answers
48 views

Atmospheric Density

As I was reading my textbook, I noted that it stated that the atmosphere becomes less dense as height increases. I am unable to understand this. I understand that pressure decreases as height ...
0
votes
2answers
31 views

Simple computation of the spectrum of the blue sky

Given an approximation of the spectrum of extraterrestrial sunlight by blackboby radiation at 5800K, between 360 and 800nm, is there a simple formula or algorithm that can be used to make an ...
1
vote
0answers
35 views

how is temperature related to quantum vibrational states of molecules

When a molecule of greenhouse gas absorbs a photon of long wave infrared radiation it is boosted to the next allowed vibrational state. The vibrational state, as I understand it, involves deformations ...
1
vote
1answer
29 views

Electron distribution in Low Earth Orbit

I have been searching online for some kind of pdf function that describes the charged electron distribution in Low Earth Orbit in regards to their energies. Any ideas on whether something like that ...
0
votes
2answers
94 views

Why does the Sun appear more round while distant stars can appear more pointed?

In a minute physics video about the shapes of stars, it mentions that stars in the night sky appear star-shaped due to imperfections in our eyes known as suture lines which cause diffraction. Then ...
1
vote
1answer
30 views

Why is it that the wind over land in day(low pressure) move to the sea(high pressure)?

According to my understanding, wind moves from its region of higher pressure to its region of lower pressure. So during sea breeze, cold wind over the sea(high pressure) blows to the land(low pressure)...
2
votes
1answer
720 views

Earth-like Atmosphere Breaks Second Law of Thermodynamics due to Conduction?

Consider a neutral gas around an Earth-like atmosphere with density, pressure and temperature given by $\rho,\ p$ and $T$ respectively. To keep the system a closed system assume that the atmosphere is ...
2
votes
2answers
37 views

Colors of the Aurora

I've seen several web pages that attempt to explain the colours of the aurora but they seem to gloss over or leave out certain details, so I'm still confused. For example, this page explains it in ...
2
votes
2answers
44 views

Why do cyclones have translational motion?

This answer provides a good explanation why cyclones (e.g. hurricanes, typhoons, and tornadoes) have rotary motion. However, cyclones usually also have translational motion -- they move from place to ...
8
votes
0answers
119 views

Why do random slabs stay dry in the rain?

The image below shows the slabbed area I can see from my work window Whenever it rains some of the slabs stay dry however, it is never consistent which ones. Can anyone explain why this happens to ...
6
votes
2answers
63 views

Blocking of infrared radiation from the sun by $\rm CO_2$ [duplicate]

Why is the infrared heat from the sun not prevented from entering the earth's atmosphere by $\rm CO_2$ to the same extent that it is prevented from leaving the Earth's atmosphere?
0
votes
1answer
64 views

What type of mirage is this?

I am very new to the world of mirages and would like some information as to the type of mirage in this picture which I took this morning. It is the cargo ship African Kalmia which passed my location ...
0
votes
2answers
65 views

Why is sunscreen more important in the middle of the day?

I suppose that if the Earth had no atmosphere and no magnetosphere, then when standing up on the surface of the Earth -- say, on the equator -- my body would catch more radiation from the sun in the ...
1
vote
1answer
39 views

Evaporation amount of water for a Storm [closed]

How much water from the ocean is evaporated for a storm over water? I am trying to figure out what conditions will cause the most evaporation or how to calculate the amount of water evaporated for a ...
-3
votes
1answer
73 views

For a lay person, what if there was no atmosphere? [closed]

What if there was no atmosphere (or little like on the moon)? Could I then hover above and watch the Earth below turn? Originally I queried, "why couldn't a person just float up in a balloon, hover ...
31
votes
1answer
3k views

Does more light from Andromeda get scattered in the atmosphere than in the entire trip to Earth?

Fires have been burning here in Northern California. Today there was just a slight haze of smoke. The sun had a slight red hue to it. As expected the lower it got the redder it became. The blue light ...
0
votes
0answers
20 views

Good books on Venus?

I'm looking for good books on Venus. I need some more general and some specifically about the atmosphere and atmospheric waves. Any detailed, complete and well structured book references are welcome.
0
votes
1answer
41 views

Why do our eyes perceive changes in apparent position of stars as twinkling?

Okay, so we all know that the changes in refractive index leads to continuous changes in star's apparent position but then why don't we see them moving up and down rather than brighten and dim in ...
10
votes
2answers
202 views

Only sea water appears blue in color, why this is not happening in river water?

Is the salt in the water the reason for scattering sunlight into blue?
0
votes
1answer
33 views

Does dew point change with change of ambient temperature?

I know dew point is the temperature at which air becomes saturated with vapor that was already in the air. So if I take some unsaturated air in a container and lower it's temperature, eventually at ...
0
votes
0answers
30 views

Computation of refractive index of the upper atmospheric air using pressure, temperature and humidity measurements

Upper Air Sounding Systems (UASS) measure the properties of the atmosphere typically till a vertical height of 30 km from Mean Sea Level (MSL). The balloon-suspended sensors used over here measure ...
1
vote
1answer
27 views

Some Rayleigh Scattering questions

Last week I've heard about Rayleigh scattering for the first time, when the classic 'why is the sky blue?' question has crossed my mind and I must admit that it is fascinating! However, I do have a ...
2
votes
1answer
82 views

Superior Mirage

I've been fascinated about mirages and never thought I'd get to see a superior mirage. I live on the south coast of England and enjoy a distant view of the English channel. Last Friday 3 August 2018 ...
0
votes
0answers
19 views

The link between two definitions of “potential density”

In Kundu's book , 4ed, P21, they define the potential density $\rho_\theta$ like this: However, later in P22, they define the potential density gradient as It seems to me that the potential density ...
-3
votes
2answers
50 views

What if the luminosity of Sunlight increased by 10% [closed]

If the luminosity of sunlight increased by 10%, would people be able to survive outside? Would such brightness of light be very harmful to them, for exemple as much as the Mercury Vapour Lamp without ...
0
votes
0answers
12 views

Does the speed of a light wave decrease in Earth's atmosphere? [duplicate]

Light wave is made up of photons, which exchange energy with the atmospheric molecules.
1
vote
2answers
23 views

what is the refraction index in the upper atmosphere(e.g Theromosphere)?

I've been searching for the refraction index in the upper atmosphere such as Stratosphere and Thermosphere but I can't find it, all that I've seen is all equation without any number that I can use it. ...
-2
votes
3answers
65 views

Max. air temperature on Earth [duplicate]

Is there any max. temperature that air on Earth could reach, assuming that solar radiation is standard and the average temperature on Earth is 14.6 like today? I mean, is there any chance that the ...
2
votes
3answers
78 views

Ocean density vs atmosphere density

I understand that the density of the oceans on Earth in on average constant regardless of the depth. It is 1020 kg/m^3 at the surface and 1050 kg/m^3 at deep waters. I understand too that this is not ...
1
vote
2answers
76 views

Global warming and air temperature

The layman's question. Is there a maximum temperature that can be reached by air on Earth due to global warming? For example, one that would prevent living organisms from functioning? I read somewhere ...
0
votes
1answer
19 views

Earth-like atmosphere on Mars, possible?

I recently watched a TED talk by a journalist, Stephen Petranek, in which he talks about colonization of Mars. Reaching the end of the presentation he talks about terraforming the planet, making it "...
0
votes
0answers
33 views

How can austronaut survive in the Thermosphere? [duplicate]

In my college class on space.. it says that: Thermosphere's temperatureis about 2000C approaching 500 miles into space? This would basically melts everything we are using in our space crafts, the ...
0
votes
1answer
66 views

Can Rayleigh scattering explain the orange color of the Titan sky?

It is my understanding that Rayleigh scattering depends on both the length of the particle as well as the wavelength. Due to the similar lengths of molecular nitrogen and oxygen it is blue light that ...
3
votes
1answer
166 views

Why can't hot air balloons fly higher then helium balloons?

I have read these questions: Hot air balloon trajectory predictions Do atmospheric physics prevent hot air balloons from ascending over 60,000ft? What is precisely the reason that a helium balloon ...
1
vote
1answer
26 views

What are the benefits of direct sun viewing spectrometer over a backscatter measuring spectrometer to quantify trace gases in the atmosphere?

I am using a Pandora spectrometer and a MAX-DOAS spectrometer to quantify the amount of formaldehyde (HCHO) present in the troposphere and stratosphere in Fairbanks, Alaska. Both the spectrometers use ...
0
votes
0answers
14 views

Making, nucleation and classification of clouds

I have to write an elaborate about : making and nucleation of clouds and their classification. I was wondering if anyone has some paper or article about it to recommend, or any university lecture.
0
votes
0answers
44 views

How to know atmospheric pressure on surface of another planet?

While reading this Wikipedia, the article says that, “The air pressure at Venus' surface is about 92 times that of the Earth.” I’m familiar with the barometric equation and it’s derivation, however I ...
-1
votes
1answer
59 views

How do we not feel the speed of rotation of Earth?

Many people say, we don't feel the speed because everything around us including the air moves with the same speed, but I am not satisfied with the explanation. If it was so, shouldn't we feel a huge ...
0
votes
1answer
41 views

Night Louder Than The Day [duplicate]

Have you guys ever felt that it is quiet at night than in comparison to day?I'm known with the fact that reduction in people's activity makes night quiet...but is there something else which in a way ...
1
vote
0answers
51 views

What are the average wavelengths and brightnesses of sunlight across the stages of twilight?

I understand that before sunrise, twilight shows several colors, so I'm looking for the average color (wavelength) and brightness (lux) of light that is being projected from the sky before the sun ...
1
vote
0answers
19 views

Slowing the late descent of an atmospheric probe in a gas/ice giant exploration [closed]

I remember the 1995 descent of the Galileo atmospheric module in Jupiter atmosphere. The robust casing made it withstand several dozens of bars of pressure before going out. What measures could be ...
2
votes
0answers
25 views

Why is the color of aurora borealis the way it is?

Why is aurora borealis mostly green, instead of pink, even though green light is emitted by excited oxygen atoms and pink light by excited nitrogen atoms? As nitrogen is present almost more than ...
0
votes
1answer
39 views

What makes an object mirror? [duplicate]

All objects reflect some of the colours and then our eyes are able to see object of different colours. But when we see mirage in a desert then it seems that the sand of the desert is acting as a ...
1
vote
1answer
55 views

Is it possible for a planet or a moon to exist with absolutely zero atmosphere?

Mercury has an atmosphere, no matter how thin that might be. Scientists say that the space is not completely empty because we can always find a few hydrogen atoms per kilometer all over the outer ...
20
votes
2answers
5k views

What is the scientific explanation for radio waves bending around the Earth?

The experiment This experiment is documented in a documentary called Convex Earth. The exact location the following information is taken from starts at 14:25. High frequency directional antennas are ...
0
votes
1answer
13 views

Molecular basis for increased water uptake by warm air

Whats the molecular basis why warm air can uptake more water than cooler air?
0
votes
1answer
34 views

Energy of UV Light

How much energy does UV light, in the atmosphere, exert? For example, I know that CFCs were outlawed because the UV light was providing sufficient energy (BDE) to break the chlorine bonds and ...
4
votes
1answer
173 views

Why microwaves used in satellite communications?

I've been reading recently that:- EM waves with a shorter wavelength have shorter range in air/other medium Microwaves are used in satellite communications over radio waves. This doesn't make sense ...