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8 votes
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The fertility of the soil

From this paper from 1958 (page 2), ... gaseous nitrogen of the atmosphere represents a vast store of potential fertility. It is not directly available to plants. Nitrogen-fixing bacteria, how- ...
Fred's user avatar
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8 votes
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Making clouds for science project

To form a cloud, generally speaking, pressure does not play a significant factor (with the exception of the effect on temperature). If you want to prove that to yourself, go outside when it is foggy ...
BarocliniCplusplus's user avatar
7 votes

Number of tectonic plates

This is primarily an exercise in interpreting a minimalist diagram. Believe me, you will have to learn to read even sketchier diagrams. That said, the test had the correct answer to the question. ...
Spencer's user avatar
  • 3,638
6 votes

Take all the CO2 in the atmosphere and put it into a layer on the surface of earth, how thick would the layer be?

Ok, based on the comments above, this is where I am at... earth's radius is $6371 \text{ km}$ earth is a sphere There is approximately $3 \cdot 10^{15}$ kg of CO2 in earth's atmosphere The density ...
Nick H's user avatar
  • 221
6 votes

Why is there a seasonal cycle to the amount of CO2 in the atmosphere?

The magnitude of these seasonal variations differ from location to location. The graph below portrays variations in CO2 levels at Point Barrow Alaska (PTB), La Jolla California (LJO), Mauna Loa ...
David Hammen's user avatar
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6 votes

Where are the oldest igneous rocks found?

Zircons from Australia at 4.4Ga, and perhaps basalts from a Canadian island at 4.5Ga. It would interest you to know the quest of Boston University geochemist Matthew Jackson, who is searching for the ...
bandybabboon's user avatar
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5 votes
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How to graph gravity as a function of depth, given radius and density?

As long as we deal with a spherically symmetric planet, the mass of the shell above you does not influence the observed gravity; the little mass close by exactly cancels the large amounts of mass far ...
Erik's user avatar
  • 1,999
5 votes

The fertility of the soil

What does 'nitrogen' mean? Nitrogen might mean gaseous $N_2$. It might also mean compounds, which contain nitrogen, such as nitrate, ammonia and ammonium. $N_2$ $N_2$ cannot be metabolized by most ...
daniel.heydebreck's user avatar
5 votes
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A sedimentary rock with only minerals

This is a really bad question, because all three can lack fossils, or all three can have fossils. The definition of "minerals" is also a bit unclear, because fossils are also made out of minerals. I'...
Gimelist's user avatar
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5 votes
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How to calculate hydrostatic equilibrium?

I am assuming you are asking for the case of sea level being 200m higher and in isostatic equilibrium. In that case we can make use of Airy's isostasy model: https://en.wikipedia.org/wiki/Isostasy#...
ye-ti-800's user avatar
  • 413
5 votes

Number of tectonic plates

There are three plates, because there are two plate boundaries (marked in blue): a convergent margin to the left, and a divergent margin to the right. Lithospheric plate #2 contains only oceanic ...
Gimelist's user avatar
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4 votes
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Relative dating of intrusion

It does seem like it's impossible to know unless you have additional information. However, I think there is a hint in there. See this white halo around the intrusion? My guess (and I could be wrong ...
Gimelist's user avatar
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4 votes
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To find hardness in Mohrs scale

Although this is a somewhat poorly researched question, I think there is an opportunity to make a nice point here. First of all, let's look at the Mohs scale: Talc Gypsum Calcite Fluorite (fluor)...
Gimelist's user avatar
  • 23.2k
4 votes

Where can I find a shallow-water solver in MATLAB?

You aren't supposed to do link only answers, but that is really all this questions deserves. Did you look on Google? I did. https://people.sc.fsu.edu/~jburkardt/m_src/shallow_water_1d/...
kingledion's user avatar
  • 3,376
4 votes
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How to calculate residence time for an element in a reservoir?

Steady state is when the size of the reservoirs doesn't change with time (because inflow=outflow). The size of each reservoir is the number inside the boxes and the flow rates are the numbers beside ...
Camilo Rada's user avatar
  • 17.7k
4 votes

How do I find the horizontal pressure level that divides the atmosphere into 2 layers of equal mass?

I always found this style question interesting as a meteorology graduate teaching assistant, as there often seemed to be a variety of ways to attempt to answer it. It's also often one of the earlier ...
JeopardyTempest's user avatar
4 votes

How do I find the horizontal pressure level that divides the atmosphere into 2 layers of equal mass?

Simple? Only assumption: hydrostatic relation $dp = -g \rho dz$ Expanding the RHS yields $dp = -g \frac{dM}{dV} dz \frac{dA}{dA} = -\frac{g}{dA} dM$ ($dA dz \equiv dV$) So any $\Delta p = c \...
Lukas's user avatar
  • 438
4 votes

How do I find the horizontal pressure level that divides the atmosphere into 2 layers of equal mass?

I'll answer my own question. If there is hydrostatic equilibrium, then we have So, assuming that the surface pressure is p (in this case 1000hPa) and that the atmosphere's top has zero (0) pressure ...
n.mont's user avatar
  • 129
4 votes
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Relation between Magnitude of Greenhouse Effect and the Concentration of GHGs like $CO_2$

Δ𝐸=133.26+0.044[𝐶𝑂2] It’s just a numerical coincidence that the 0.044 looks like the molar mass of CO2. That equation gives 0.044 * 380 = 16 W/m2, which is the reduction in surface downwelling IR ...
Deditos's user avatar
  • 3,960
3 votes

How do I find the horizontal pressure level that divides the atmosphere into 2 layers of equal mass?

Pressure in a fluid is, literally, the weight of the fluid above the point of measure, per unit area, so if you have half the amount of air (or water, for the matter) above you, then you will measure ...
DrGC's user avatar
  • 1,773
3 votes

How to graph gravity as a function of depth, given radius and density?

For each point as you descend into your planet you have a balance between gravity due to a solid sphere below you and "counterbalanced" by the gravity due to a hollow sphere of the planet above you. ...
verisimilidude's user avatar
3 votes

How do I convert between different east longitude coordinates?

In Matlab if you have the mapping toolbox you can simply do: lon2=wrapTo180(lon2); And your approach is totally right, but if you have to do it more often or with ...
Camilo Rada's user avatar
  • 17.7k
3 votes
Accepted

When and where is the atmospheric greenhouse effect strongest?

It is strongest in the arctics,most radiation from this area will be long wave infra red and long wave infra red is absorbed and reflected by the climate gases in the atmosphere. A large part of the ...
trond hansen's user avatar
  • 1,888
3 votes
Accepted

How do I find the temperature of the air mass, and how do I use a t-skew chart?

I don't want to answer your question explicitly because it will ruin your education. Instead, I will guide you by asking three questions: Where on the Skew-T are you? Where on the Skew-T do you want ...
BarocliniCplusplus's user avatar
3 votes

Complete missing outcrop problem

First step - draw a strike line where line A intersects the 400 m line. Second step - you know that the sandstone layer is of equal thickness and dip, so you can draw a parallel line at the place with ...
Gimelist's user avatar
  • 23.2k
2 votes
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Dynamic meteorology - calculating air temperature based off falling air

\begin{equation} \frac{w}{kg} = \frac{J}{kgs} = \frac{Nm}{kgs} = \frac{kgm}{s^2}\frac{m}{kgs} = \frac{m^2}{s^3} \end{equation} So, $J$ and $wg$ have same unit, and also your final answer has correct ...
Jaemin Hong's user avatar
2 votes
Accepted

Easy homework questions about seasons and daytime

The figure depicts the Northern hemisphere summer solstice, given that, there is no information missing: At which width circle does the sun shines perpendicularly? The one labeled "13 1/2 uur" that ...
Camilo Rada's user avatar
  • 17.7k
2 votes

How do you calculate the elevation at which clouds will form (lifting condensation level)?

ANSWER: $h={\Delta}t/{\Delta}l$ $h=$ height of LCL (unit depends on unit height of lapse rates) ${\Delta}t=T-T_d$ ${\Delta}l=l_t-l_d$ $T$ is surface temp (deg) $T_d$ is surface dewpoint temp (deg) ${\...
Ted MacKechnie's user avatar
1 vote

How do you calculate the elevation at which clouds will form (lifting condensation level)?

Well, I think if it starts at T=30, and the dew point is T=15, then once it has dropped 15 degrees clouds will start to form. The DALR is about 10 degrees/km. SO, first, I think you need to solve ...
eSurfsnake's user avatar

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