Questions tagged [radiative-transfer]

Transfer of heat/energy through Electromagnetic waves Radiation (EMF)

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0answers
32 views

Amount of scattered vs. direct UV light from the Sun

I was wondering about the common saying that on a sunny, cloud-free day, depending on location, you can get a sunburn even when spending the whole day in the shadows. Already our blue sky provides ...
7
votes
1answer
88 views

Is there a formula that gives the temperature of an object or person exposed to the sun?

It is well known that temperature sensors are often shaded, partially to mitigate the variability due to varying cloud cover. However, most people experience temperature within the sunlight. Other ...
0
votes
1answer
157 views

Modified blackbody model of earth. What is wrong with it? [closed]

I have made a modified blackbody model that predict earth temperature distribution with high accuracy. It doesn´t include mass or gases. It is based on the initial thought that all energy above ...
3
votes
0answers
160 views

How to output slope parameter and shape parameter in WRF?

I'd like to ask if it's possible to output slope parameter and shape parameter of cloud hydrometeors in WRF? I'm calculating cloud effective radius and I'm using the formula found in Morrison scheme ...
3
votes
3answers
301 views

What are the major contributors to the amount of infra-red emitted by the earth?

From the answers from an earlier question, I learned that most of the solar radiation gained by the earth system (atmosphere, surface, and inner mass) is re-radiated back into space in the form of ...
2
votes
2answers
168 views

Why doesn't the earth become superheated?

One day I was sitting in an Atlanta traffic jam wondering about all the engine exhaust heat warming the localised environment. Later that night, things will have cooled down. Where did the heat go? ...
3
votes
1answer
970 views

shortwave and longwave radiation terminology, direct, beam, PAR, flux?

Some reanalysis data sets provide different components of shortwave radiation (near infrared and visible) and longwave. They are referred as radiation or flux. Also there is no mention of "direct" ...
15
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2answers
1k views

Why are clouds darker before it rains?

What causes the darker color of the clouds (nimbus) when it is about to rain? Non-precipitating clouds (e.g., cumulus, stratus) tend to be white, but rain clouds become gray and almost black before it ...
12
votes
1answer
746 views

Dry atmospheric temperature profile (dry adiabatic vs. isothermal)

I'm trying to understand why there are differing predictions of the atmospheric temperature profile. It is well established that the dry adiabatic lapse rate (DALR) is: $$ \frac{\mathrm{d}T}{\mathrm{...
23
votes
5answers
19k views

Is the color of the sky the same everywhere on earth?

Is the color of the sky at noon (local time) in, say, NY, Buenos Aires, London, Nairobi, Sydney, New Delhi and Tokyo the same? I choose the specific time of noon to exclude the twilight colors of the ...
32
votes
3answers
3k views

How does anthropogenic heating affect global warming?

Anthropogenic-sourced greenhouse gases are commonly cited as the main source for human-caused climate change. However, something that I never see discussed is the actual heat produced by human ...