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1500 questions
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What geological events could cause a Volcanic Explosivity Index (VEI) level 9 eruption?
The Volcanic Explosivity Index (VEI) is a way of measuring the relative explosiveness of volcanic eruptions, allowing for comparisons between volcanoes. According to the USGS Volcanic Hazards page,
The VEI uses several factors to assign a…
user889
10
votes
7 answers
How can one know the correct direction on a cloudy day?
On a sunny day, one can find the direction (NESW) by observing the Sun's movement across the sky.
In the northern hemisphere, during a clear night, one can find the direction by looking at Polaris or other stars and constellations.
However, how can…
YYY
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How do I calculate Per capita $\ce{CO2}$ emissions?
I need to find the per capita $\ce{CO2}$ emissions for Canada in 2010 (expressed in kg/day). I know that Canada had $\ce{CO2}$ emissions of 0.55 (Gt) and a population of 34 million in 2010.
I am just having trouble on how to calculate it per capita…
Sofia June
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2 answers
How has the total area of continents changed during the Earth history?
Earth's total land area has increased throughout its history according to this video. What is the dependence of the total area of continents from time?
Imyaf
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Why is a layer of the subsoil so dark on this construction site?
I have this construction site right outside my house, which I would like to give you some geographical background about before asking my question. Have a picture first though
There used to be industrial buildings of red clay bricks like the piece…
Spraygun
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10
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1 answer
Formation of ice shape
Last night it dropped to around 25°F here in Wildwood, GA. I noticed what looked like patches of cotton on the ground that were not there the day before. At closer look they are patches of frost/ice. Some, like the image below, appear as if they…
relayman357
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Are there any high-resolution urban CO2 concentration data sets?
I gather that higher-than-ambient CO2 "domes" can form above urban areas, enhancing other local air pollution. Are there papers or datasets of average CO2 concentrations down at ground level (say 0-20 metres upwards from the ground), in the spaces…
410 gone
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Why is q used for specific humidity?
$q$ is the symbol used for specific humidity in many textbooks and papers (at least in meteorology and climatology, I'm not familiar with it in other disciplines). Where does this symbol come from, and what does it stand for?
naught101
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Is it inevitable that a mega tsunami will hit America?
According to a documentary, "Mega Tsunami - A wave of destruction", most mega tsunamis are caused by landslides creating tsunamis 10 times the size as those caused by earthquakes. It was said that there is a volcano in the Canary islands that holds…
Kenshin
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Does the long-term ice-core temperature record provide reasonable evidence that the current temperature trend is not anthropogenic?
When looking at the long term ice-core temperature record, it very clearly shows a ~100,000 year cyclical trend with warming spikes and gradual cooling. To the untrained eye, it seems that such a trend has not been significantly deviated from so far…
B T
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10
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9 answers
Are there any (land) hills/mountains with bases below sea level?
There are areas of land that are in fact, below sea level. Are there any hills or mountains that have bases that start in these below-sea-level areas of land?
blademan9999
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5 answers
Why had climate change not been proven beyond doubt for so long?
I just read the IPCC's Fourth Assessment Report and noticed that this is the first (or first very significant) report to state that climate change exists and can no longer be scientifically disproved. However, humankind has known since 1824, since…
Weiss
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3 answers
Is it safe to keep volcanic sulfur at home?
Took some sulfur stones while hiking on a volcano. Keeping them at home as a piece of decore. Is it safe to store it on a shelf? Can it ignite or somehow do harm to me or to my pets?
Boris Chumichev
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2 answers
Is "humidity" the quantifiable metric for mugginess?
I've always described somewhere as "humid" if the air feels very moist and muggy. So, in the US, I'm thinking of places like Texas (e.g., Houston) and Florida (e.g., Miami). I would consider places like California (e.g., LA) and Colorado (pretty…
student010101
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Why do rainbows appear to have a fixed structure?
Why do rainbows appear to have a fixed structure when a bunch of raindrops are 1. moving, and 2. granular?
Reuven
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