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1500 questions
11
votes
1 answer
How to statistically downscale wind speeds?
Background
I am trying to estimate wind speeds at a proposed wind farm site using the method described in this paper: Modeling of Ethiopian Wind Power Production Using ERA5 Reanalysis Data. The approach is summarized in figure 2 of the paper.
Short…
Bobby Heyer
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11
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2 answers
What is the Calcite Compensation Depth and what is its significance for carbonate deposits?
What is the Calcite Compensation Depth (CCD) and what is its significance for carbonate deposits?
hugovdberg
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11
votes
2 answers
Do satellites decrease the amount of solar radiation reaching Earth?
According to this website, there were 3,372 active satellites in orbit at the beginning of 2021. Furthermore, SpaceX is planning to launch 12,000 satellites to provide cheap internet for everybody, among other functions.
Does this huge collective…
user20559
11
votes
3 answers
Impact of Sugar on the environment
i hope this question fits here.
In my local nature reserve there is an "art" project... but the local population has it's concerns.
Seeing most things seem to be random trash thrown in (like the engine of an old oil tanker).
One of those art…
A.bakker
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11
votes
1 answer
The river or the hills; which came first?
On the upper Mississippi in Illinois and southern Wisconsin, the river is bounded by hills and bluffs which define the outer edges of the flood plain. There are similar configurations for some of its tributaries, specifically the Illinois, the…
piquet
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11
votes
1 answer
Relation between fault rupture aspect ratio and slip rate?
I am modeling a fault surface (which I consider to be a plane rectangle). I got the area of the surface, but the orientation is unknown, which can be found out if the aspect ratio of the rectangle is known. Is there a way to find this using the…
user590
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11
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7 answers
While desalinating ocean water, would it be bad if we didn't pump the brine back into the ocean?
Desalinating ocean water takes seawater, separates the fresh water from the brine, and usually pumps the brine back into the ocean. But what if we didn't pump the brine back into the ocean? (For example, if we left it out to dry in the sun and then…
snips-n-snails
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11
votes
1 answer
Is it possible to see Auroras from the equatorial region?
I thought Auroras are only visible in the North Pole and South Pole, but recently, I found out that Auroras can be seen in areas of the world closer to the equator.
An example is that in the year 1909, a great storm of Auroras were seen in Japan and…
Hari-pacific
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11
votes
1 answer
What generates the microseism?
Looking at seismic noise around the Earth there is commonly a peak in the seismic noise around a frequency of 200 mHz. This peak is typically referred to as the microseism (an example is shown below). What is the source of these low frequency…
Chris Mueller
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11
votes
2 answers
Propagation of sound after lightning
In an area of frequent thunderstorms, I notice a 'crack or whoosh' sound if a strike is nearby but little or no thunder. Yet I can hear for 30 seconds or so after a distant flash when the thunder first is heard, the sound starts at a high frequency…
ScottyAustin
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11
votes
1 answer
Determining a rock age using volcanic ash layer
I wanted to know if volcanic ash deposits found in the geologic record are most useful in correlating the age of rock layers if the volcanic ash was distributed over a large area during a short period of time or large area during a long period of…
charlston
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11
votes
1 answer
Winds in a northern hemisphere hurricane
In the Northern Hemisphere, do surface winds around the center of a hurricane move counterclockwise and inward or counterclockwise and outward?
I'm guessing they move inward.
charlston
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11
votes
1 answer
Are the elements of an averaging kernel matrix always centered on the diagonal, or can they be exclusively off-diagonal in rare cases?
According to Rodgers (2000) equation 2.80
$$
d_s = \mathrm{tr}(\mathbf{A})
$$
where $d_s$ is the number of degrees of freedom for the signal, tr denotes the trace, and $A$ is the averaging kernel matrix.
I'm trying to properly understand this. For…
gerrit
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11
votes
2 answers
How do I derive the formula for lithostatic (overburden) pressure?
The title pretty much says it. I have the formula: $P = \rho g h$ where $\rho$ is the density, $h$ is how deep the pressure is in the Earth and $g$ is the gravitational acceleration(?).
I don't get the units either. If I substitute the units for…
Tamás
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11
votes
3 answers
Is it right practice to validate temperature data with reanalysis data?
For a project I am working on I received raw data from many meteorology stationes.
Is it right practice to test this data against air temperature from noaa's ncep/ncar data?
eliavs
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