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Questions tagged [mathematics]

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-1
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1answer
33 views

How to determine (lost) surface (km²) of a country when both population and population density have changed? [closed]

I am not sure if the question suits in this stack board, but I give it a try. Let's assume there is a country with a population of 327 million people and a surface of 9.6 million km², resulting in 34 ...
2
votes
0answers
58 views

Optical Thickness of the Atmosphere

Homework question: Show that the absorption optical thickness of the atmosphere at pressure $p$ (i.e., between $p$ and the top of the atmosphere) as a function of the mixing ratio of the ...
5
votes
0answers
63 views

regression map vs correlation map

What is the exact difference between regression and correlation maps? I know that they are often used in climate science but which is the difference in the information they provide? Here an example I ...
2
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2answers
396 views

How do I convert kg·kg⁻¹ to ppbV (parts per billion volume)?

I am using the CAMS model output data to figure out the ground level ozone at a particular place. It is given in mass mixing ratio, and I want to convert to parts per billion volume mixing ratio (...
1
vote
1answer
91 views

how much entropy is there in the shape of a rock?

If I dig up a given rock, make a 3d model of it, and compare that model with those of a large number of other rocks from the same area, what fraction of other rocks would have the same 3d model? Let'...
3
votes
1answer
240 views

Applications of differential/integral calculus in crystallography (teaching undergraduates)?

I'm a mathematics professor who is seeking to find interesting, application-driven ways of teaching freshmen college students differential/integral calculus. I am in no way versed in crystallography ...
0
votes
3answers
120 views

What makes up a gradient [closed]

My question is a two part question. First I currently know of two different gradients.I think there is more; however, I don't completely understand what makes a gradient. So, here is my questions. ...
5
votes
1answer
91 views

Growth of polar vortices vs projective geometry; what does this figure mean?

I was reading the Wikipedia article about a mathematical subject called projective geometry, and I noticed that the second image in the body of the article referred to the "growth of polar vortices". ...
8
votes
1answer
718 views

Math needed for Hydrology, specifically surface water hydrology

I wanted to know what math is needed for hydrology, in particular surface water hydrology. In my research online, of Master's programs (either in Hydrology or Environmental Science with a ...