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1500 questions
8
votes
1 answer
What is this strange formation near Râmnicu Vâlcea?
So I was browsing Google Earth the other day and I found this strange formation near Râmnicu Vâlcea, at about 45°07'N 24°16'E
It's an almost circular region, about 40 km in diameter which to my eyes looks like a multi ringed impact crater, but…
memory of a dream
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8
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2 answers
What are some options for online and offline particle tracking in ocean models?
I am looking for a few options of particle tracking for ocean modeling to try to do a comparison of different codes.
arkaia
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8
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3 answers
What do you call boulders of non sedimentary rock that were lithified into sandstone?
I'm convinced there is a word for this. I was in the Hoodoos at Writing on Stone this weekend and kept noticing what looked like reddish quartzite boulders laying around in the sand, or sometimes sticking partially out of the hoodoos.
When a…
ShemSeger
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8
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1 answer
Regarding velocity of P/S-waves
I feel like I am missing something blindingly simple, but I am curious about something.
We are given the velocity of a P-wave as $v_{p} = \sqrt{(K+\frac{4}{3}μ)/ρ}$. So I am to understand conceptually that as density increases, the velocity of the…
Thomas
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8
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4 answers
Why do we say Earth rotates from west to east?
It is said that Earth rotates from west to east. I take this as
Earth's western hemisphere moves towards the Eastern hemisphere when seen from the frame of reference of pole star.
Now I can also say that,
Earth's Eastern hemisphere moves…
user31782
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8
votes
2 answers
The significance of peak period in surface wave models
The peak period or peak frequency is considered to be an important quantity in characterizing ocean surface waves, including wave models [e.g., 1]. But practically, why are we interested in modelling the peak period accurately?
I'm thinking the…
user4624937
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8
votes
1 answer
How to cite LandSat 8?
I'm wondering how to quote a Landsat mission product. I have seen many ways, but I can't decide which one is the best. Thus, I would like to know if there is a standard for the minimum information that should be quoted such as mission, data, sensor,…
Jean
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8
votes
5 answers
Round structure in southern United States
Assuming here might be someone who knows something about this, I wanted to ask what is behind this round structure I have spotted today on Google Earth:
There seems to be a large (~200 km), nearly perfect half-circle covering the states of Alabama,…
adjan
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8
votes
2 answers
Earthquakes in Oklahoma influenced by Humans?
I'm currently living in Oklahoma, and there has been an abnormal amount of earthquakes lately, by abnormal I mean more then 5 in a day(not sure if that's normal or not)..
I've also been told that in OK earthquakes are a relatively new thing, now…
Bam
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8
votes
3 answers
What exactly is a model grid?
I have just begun reading some notes about modelling and can't seem to understand what a 1°x1° grid or a 2.5° grid or 1/4° grid is. I know it is something related to the resolution of the area over which the model is run. But when a line goes like…
Darkgod
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8
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0 answers
Worldwide weather maps database
I am searching for a database (a free one would be great) that would give me, for any chosen rectangular area on earth, historic data about pressure, sea water temperature, wind (including both speed and direction) and in general as much…
Pop Flamingo
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8
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4 answers
First to Sail the Jet Stream Around the World
My questions are related to a scenario discussed on Earth Science: A huge (heavier-than-air) kite sailing in and out of the jet streams.
The kite:
The scenario:
The assumptions:
Such an airship exists and there is a person aboard, with an…
Muze
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8
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2 answers
Cross-line fold of a towed-streamer survey
On page 29 of the book 3D Seismic Survey Design by Gijs O. Vermeer, Vermeer says that the equation for a maximum fold in a 3D survey is the following:
$M = M_i \times M_c$
where $M_i$ is the inline fold and $M_c$ is the crossline fold. For a towed…
geofisica
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8
votes
1 answer
Unrealistic solution for advection-diffusion-reaction PDE with heterogeneous porous media
About the code: I have a code which simulates concentration from advection-diffusion-reaction PDE in 2D space (X,Y) with time. The solution is obtained using fully implicit finite-difference method and includes the capability to simulate a media…
user3153
8
votes
2 answers
What does global weirding mean regarding temperature extremes?
Global weirding is a term used to describe how, with global warming, we will see more extreme weather events:
Avoid the term “global warming.” I prefer the term “global weirding,” because that is what actually happens as global temperatures rise…
mart
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