All Questions

Filter by
Sorted by
Tagged with
4
votes
2answers
986 views

Causes of fluctuations in atmospheric oxygen in past 300 Mya

I have two questions based on the history of atmospheric oxygen levels depicted below. Source: https://commons.wikimedia.org/wiki/File:Sauerstoffgehalt-1000mj2.png. The notes below the chart explain ...
2
votes
2answers
113 views

Is the Amazon rainforest resistant to fires?

Comparing the picture from Wikipedia that delimits the Amazon rainforest and the picture of the recent dramatic fires in the area that NASA published, what I can gather is that the burned zone is the ...
2
votes
2answers
116 views

Temperate Rainforests

I have heard that the Appalachian Mountains is qualified as a temperate rainforest. What qualifies a temperate rainforest and what makes the Appalachian Mountains a temperate rainforest?
3
votes
2answers
25k views

Why was the sky SO yellow?

Today, I was coming back from music school, and it was raining heavily. An hour after I came back, the sun started coming out from one side, and the sky wa very brighr yellow. The lighting effects ...
-1
votes
1answer
68 views

Has irreversible global warming already begun? [duplicate]

Climate is a high order nonlinear dynamic system and as such: is complex to study is not controllable via linear input as in we pollute less -> temperature drops...
1
vote
2answers
62 views

Does US have more forest fires in Sep 2020 than average?

I see lots U.S. wildfires on Zoom Earth, and lots news about them. Is this amount of wildfires normal? Or is this average? If over average, why?
0
votes
1answer
111 views

Cloud Formations Near Capetown

Why do clouds form a 'tablecloth' which exactly fits the top of Table Mountain near Capetown, South Africa? Something about the table top tailors the clouds to fit it exactly. The thickness is smooth ...
0
votes
0answers
30 views

Forest fuel biochar burial

Record fires are blazing in the west coast, huge even compared to California's notorious summers. Dead plants and debris are crucial to get a fire started. This debris could be collected, carbonized, ...
0
votes
1answer
245 views

The Medieval Climatic Anomaly

Trying to understand this question, posted to me by a lecturer at University: "The Medieval Climatic Anomaly was distinctive in terms of the prevailing climates and forcing mechanisms operating ...
2
votes
2answers
180 views

Conditions of Thunderstorms

Why do some heavy rainstorms and hailstorms not produce any lightning or thunder at all when I thought that these conditions of heavy rain and hail are right to bring lightning and thunder but don’t ...
0
votes
0answers
46 views

Why Hong Kong typhoon signals only 1, 3, 8, 9 and 10?

Why doesn't Hong Kong have typhoon signal numbers 2, 4, 5, 6, 7? Please explain like I'm 5. I read Quora, but I don't understand those complex answers!
5
votes
1answer
77 views

Has Antarctica's coastline been completely mapped? (map discrepancies)

Looking at different world maps, I noticed that there is considerable variety in how the coastline of Antarctica is depicted (even when taking the different map projections into consideration). Are ...
2
votes
0answers
45 views

Looking for the climate classification for a particular climate

I'm looking for the climate classification among the many different climate classification systems covering my absolute favorite form of climate. If a classification for this doesn't exist, and you ...
1
vote
1answer
34 views

What exactly are singular biomes as units?

So let's take the tropical rainforests of Earth for an example. The Congo, Amazon, Indonesia, Malaysia, and wherever else it may grow. Are all these aforementioned places considered parts of one biome,...
0
votes
1answer
100 views

Difference between soil Water Holding Capacity and soil pore volume?

I have got confused I took 100g soil in a funnel with filter paper. poured 100 ml water and collected the drained water in a calibrated cylinder. Water added in funnel = 100 ml Water collected in ...
3
votes
2answers
1k views

What exactly are enantiotropic and monotropic polymorphic transitions?

Recently, I've been studying the subject of polymorphism and met two important concepts, the monotropic and enantiotropic polymorphic transition types. However, I can't really seem to grasp the ...
0
votes
2answers
85 views

Doesn't Increase of Potential Temperature with Height contradict Adiabatic Nature of Processes within Troposphere?

I refer to this question, I asked recently in the physics board: https://physics.stackexchange.com/questions/578308/doesnt-increase-of-potential-temperature-with-height-contradict-adiabatic-natur It ...
3
votes
1answer
59 views

“Major Lunar Standstill” causing high tides?

The Major Lunar Standstill, as the cycle is called, has been followed by serious starwatchers since the Babylonians. Like clockwork every 18.6 years, it triggers severe tide spikes, swells, and floods,...
1
vote
2answers
100 views

Why aren't there ultra acid igneous rocks?

In my study, I found that in volcanoes when the magma is going up it formed different types of rocks. There are basic, acidic and ultrabasic. My question is why isn't there ultra acid igneous rocks ...
10
votes
8answers
3k views

Could an icy/extremely-cold asteroid/comet ever strike and cool the Earth?

This is obviously an imaginary question, but it seems like something computable (which I don't have the mathematical ability to do so unfortunately). P.S. I do not have in-depth knowledge about comet/...
1
vote
1answer
26 views

regarding four-way closure in structural geology

I am a little bit confused on the two concepts in structural geology, i.e., what is the relationship of anticline and four-way closure. My understanding is that anticline belongs to four-way closure. ...
3
votes
2answers
114 views

What sort of a plate is the Sunda plate?

I have read that the islands of Sumatra & Java have resulted from the subduction of oceanic crust of the Indo-Australian plate beneath the Sunda plate. I want to know whether this boundary is ...
2
votes
1answer
68 views

Urgent, Please help, where can I find worldwide standards of manganese mining?

Hi everybody who sees this post, I need urgent help for finding all official world wide standarts of the manganese mining. Problem is that, many houses has been damaged in my village with manganese ...
1
vote
2answers
51 views

Does anyone know a book/article/research that talks about forest fire prevention?

In my college we have to start our thesis in the third semester, so I'm going to do a research about forest fire and its prevention. However, I'm struggling to find a article that talks about that ...
4
votes
0answers
65 views

Dynamic of glacier retreat? (here: in Greenland)

During the last years I have taken many pictures of obviously retreating glaciers and empty moraines in Greenland - just like this one. Looks devastating, actually. In my understanding, the current ...
16
votes
5answers
4k views

How did forests end up covering pyramids?

I went to Mexico and the pyramids are covered by vegetation. It's only after archeologists clean them that you can actually see the pyramids. Before that they looked like a natural hill, with soil, ...
0
votes
0answers
31 views

Has there been any days in the lower 48 states of the USA with no recorded rain?

Today I looked at the radar for the US and it looked pretty sparse, which lead me to wonder, have there been any days/times with no rain within the entirety of the region?
38
votes
2answers
8k views

How it's possible to measure temperature 2000 years ago with such precision?

I saw this graph about the global temperature, it goes back for 2000 years. How is it possible to measure temperature 2000 years back with such a precision of like ~0.1 C? The image from Reddit post I ...
3
votes
0answers
32 views

How to estimate the settling time of atmospheric particulates as a function of aerodynamic size?

Understanding the behavior of particulates in the atmosphere is important for modeling climate, weather and public health. They can be nucleation sites for rain, fog and smog, they can have thermal ...
3
votes
1answer
152 views

What is the most optimal latitude on Earth for the generation of extreme maximum temperatures?

First question on this StackExchange, so here goes... Overall, reaching high temperatures is dependent on 2 factors: The (maximum) solar angle in the day. The greater the solar angle, the more ...
4
votes
1answer
16k views

What time and date is the sun directly overhead a given place on Earth?

In different regions, the sun is directly overhead at different times of the year. When do these event happen?
0
votes
0answers
27 views

Can we calculate the pressure gradient impact on two cyclones with the Fujiwhara effect?

If two cyclones come together and orbit each other as per the Fujiwhara Effectis there a way to calculate the change in pressure gradient that each will face? If not, are there at least pressure ...
3
votes
1answer
38 views

Why is ozone layer so important when oxygen atoms absorb UV Rays?

Oxygen molecules absorb UV Rays and are converted to elemental oxygen atoms. These elemental oxygen atoms combine with molecular oxygen to go give ozone . When there is so much oxygen present in ...
15
votes
2answers
4k views

Would hurricanes on an ocean planet continue indefinitely?

Hurricanes seem to run out of steam when they make landfall. If our planet were entirely covered by ocean, would hurricanes continue indefinitely? Would they keep gathering energy and increasing in ...
0
votes
2answers
50 views

How do scientists know the precise location, etc. of the earliest supercontinents? Or their configurations far, far into the future?

Obviously, we can look at where continental plates are currently moving, and extrapolate both forwards and backwards in time... But there have (allegedly) been more than supercontinent in the past... ...
0
votes
1answer
78 views

Glacial extent variability during last glacial period?

Does anyone know an online source to illustrate glacial extent variability during last ice age, ca 120 ka BP to 10 ka BP? Most sources seem to concentrate only on the maximum, but apparently, there ...
1
vote
0answers
33 views

Unusual small bright ring in storm cloud

I was taking photos of a storm moving through the area, Southwest of Fort Worth, Texas and caught this image in one of the series. The photography is a hobby. I was using my IPhone 6. I researched ...
4
votes
2answers
231 views

Where does molecular hydrogen in the atmosphere come from?

This figure from Wikipedia's Atmosphere of Earth shows a hydrogen fraction of 0.000055 percent by volume. Question: Where does molecular hydrogen in the atmosphere come from? Does this come directly ...
8
votes
2answers
741 views

How does the ozone layer “stay in place”?

It is said about ozone: a layer in the earth's stratosphere at an altitude of about 10 km (6.2 miles) containing a high concentration of ozone Over the Earth’s surface, the ozone layer’s average ...
2
votes
1answer
37 views

Can humanity help reinforce the ozone layer?

The ozone layer has been weakened by humans over the last century, but is slowly recovering. Can humanity help undo the damage faster by manufacturing and releasing ozone? Would it be enough to ...
4
votes
0answers
85 views

What is this fossil? [closed]

While walking in a state park yesterday in the Chattanooga, TN area we came across a rock that looked like this. Is it some kind of holdfast or washout from cement work? (There is an old reservoir ...
1
vote
0answers
51 views

Do clouds always move?

Can a cloud ever be stationary with respect to the ground surface? For some reason (experience, logic?) it seems to me such case is not possible. I read that stationary fronts are defined as two air ...
8
votes
1answer
214 views

Alternative WMS servers for GOES-East satellite imagery

I'm having some difficulty finding a WMS (web mapping server) for North America GOES-East satellite imagery that matches my needs (visible and IR4, timely, with no alteration of grey-scale pixel ...
2
votes
2answers
707 views

Feedback loops between soil chemistry and plant growth

Would the dynamic between soil nitrogen and plant growth be a positive or negative feedback loop I think it is a negative feedback loop because as soil nitrogen increases then plant growth increases, ...
2
votes
1answer
104 views

How much of the petroleum ever formed has made it into reservoire rocks?

I am aware that it's a bit general a question, and petroleum geology (or petrology ;-)) has never been a field of interest to me. A superficial search using related keywords brings up only economic ...
1
vote
1answer
50 views

Why autumn follows the rainy season

My location is India (this is to mention the context). The question I submit here is a common man's query (the level of this question and the expected answer). Water is essential for the growth of ...
8
votes
1answer
10k views

Continuous lightning for over an hour; is this phenomenon common and does it have a name?

A few months ago, I witnessed something off the coast of Florida that I have never seen in my life. From my apartment, from about 10PM - 12AM, I saw pretty much continuous cloud to cloud lightning. I ...
4
votes
1answer
65 views

What is a reasonable range of values for resistance to heat flux?

I am developing a simple parameterisation scheme script to predict surface temperature. The script calculates six heat fluxes including sensible heat flux using a resistance to heat flux parameter. ...
1
vote
1answer
57 views

Recursion relations of Associated Legendre Polynomials with Schmidt Semi-normalization

Can someone please provides me with the recursion relations of Associated Legendre Polynomials when using Schmidt quasi-normalization? I need that in the context of Geomagnetism to obtain the ...
1
vote
0answers
30 views

What is the best way to calculate anomaly of meteorological variables with the (GFS/GEFS) forecast

To calculate the anomaly of a variable (temperature, for example) I need the climatology (at least 30 years) of that variable. Which climatology data source should I use? Should I use the "...

15 30 50 per page