Questions tagged [desert]
concerned with the formation of deserts (areas receiving very little precipitation) and processes occurring specifically within deserts
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At what theoretical depth of sand would pressure turn the sand into rock?
Thinking about the movie Dune (this is not a sci fi question) got me to wondering.
In the theoretical situation where you had a desert of sand with an unlimited depth here on Earth. At what depth ...
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3answers
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Hypothetical: Can we rehabilitate arid/desert landscapes through the artificial precipitation from exhausts of hydrogen powered airplanes?
Note: I know this question sounds fit for aviation stack exchange, but other aspects of this question like cloud formation, atmospheric behavior, precipitation and overall water cycle can be better ...
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Arabian Desert rock formation
I'm interested about this rock formation in Arabian desert. The rock looks like melting chocolate.
Not sure where the exact Location, the source says it around Al-Ula, Saudi Arabia. Here the image ...
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2answers
125 views
Could saltwater be useful for greening deserts and sequestering CO2?
Desert greening is the conversion of deserts into moister environments with more vegetation. This could be used to combat desertification and (by sequestering CO2) climate change, and also to increase ...
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1answer
125 views
If we could green the Sahara, would it be able to sustain itself?
Let's say at some point in the future we have an abundance of fresh water (for example because we have enough energy to power many desalination plants) and we can turn the Sahara into green land by ...
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How do oases form in the middle of the desert?
I am wondering if there are any theories about the formation of oases, and I am also curious about why an oasis can even last for a very long period of time.
I have heard that fresh water exists on ...
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3answers
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Why is reverse osmosis desalination the dominant method used and not heat-based methods? Also why is brine being dumped back into the ocean? [closed]
So I was recently watching this video regarding desalination efforts around the world and the viability of desalination as a means to provide humans with freshwater. I had a few questions:
1 - They ...
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2answers
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When was it ever considered that the desert might be "man-made", or otherwise anthropocenically-induced?
This answer pointed me to the Wikipedia page for Farouk El-Baz in which the desert research and theories subsection says:
During the past 20 years in his research at Boston University, El-Baz has ...
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2answers
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How can the Simpson Desert be the largest sand dune desert in the world?
In the Wikipedia article for the Simpsons Desert in Australia in the first paragraph it says:
It is the fourth-largest Australian desert, with an area of $\small\mathsf{176,500}$ $\small\mathsf{km^...
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What is this big Black Mass in Syria, as seen on google maps? [duplicate]
What is this big black dot on the satellite view of google maps, located in Syria at about 4:00 from Damascus?
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1answer
553 views
Is this a former volcano in the Hamad Plateau, in the Syrian desert?
On my random explorations of google maps, I came across this interesting terrain:
(link to map here)
Apparently, this is part of the so-called Hamad Plateau, in the Syrian desert. If so, the rock ...
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2answers
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Reversing the desertification
What will be the effect on a desert-like area if it is covered with millions of umbrella-like structures like the following one?
Would it play any positive role in reversing the desertification?
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1answer
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Are there areas of desert sands which experience blizzards?
Building off of another question I recently asked (Is there sand in Antarctica?) I want to ask a broader question coming from the same motive described there.
Are there desert sands that experience ...
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0answers
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Global climate change
We all know that global climate change is becoming a big real change that is affecting the world's ecosystems and life cycles.
Will global climate change affect the hot areas of the world or deserts ...
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What percentage of Earth's surface is arid?
Is there available information on how much of Earth surface is arid climate?
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Is Atacama Desert cloudy or cloudless most of the year?
I saw many contradictions everywhere.
For example, my geography textbook says that Atacama Desert is a desert where foggy weather is common, and it persists almost the whole year. Whereas every ...
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4answers
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Why are many fossils found in deserts?
Why are deserts famous for fossils? Is it a coincidence? Some examples:
Giant Catfish Fossil Found in Egyptian Desert
Chile's stunning fossil whale graveyard explained
Giant Dinosaur Fossil Found ...
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1answer
177 views
What are these features in the Tombouctou Region?
I’ve recently been very interested in globe-trotting via Google Earth. At first I was using it to plan out hikes to possible mineral deposits locally, or potential fossils/ archeology sites. However I ...
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1answer
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Can the formation of gypsum evaporites (sand roses) be simulated in the lab?
Has the process of formation of sand roses been simulated in laboratory conditions, or does it take too long?
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1answer
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Hypothetically, would digging a big trench from the ocean and flooding desert areas be a bad solution to combatting sea level rise? [duplicate]
My question is basically the title. Ignoring most of the feasibility of the enormous engineering and earthmoving requirements (I guess I mean to say, given an unlimited budget) in very hot areas, ...
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3answers
644 views
When was the first not-icy desert formed?
For how long have deserts existed and which one would be the first to be created? I'm talking about arid, dry deserts, not the Antarctic or Arctic or any other icy deserts.
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1answer
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Is there any place on Earth that is permanently a desert?
I am interested to know if there is any place on Earth that is permanently a desert (except Antarctica). By permanent I do not mean to be the physical meaning of forever. It means the place has to be ...
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1answer
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What is this weird looking structure in Ethiopian desert?
I was surfing through Google Maps around Ethiopian desert region (close to the town of Werder/Wardheer) and I found this weird looking structure. It seems like a dried up lake bed, but I can't guess ...
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4answers
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Was Judea as desertified 2000 years ago as it is now?
The ancient fortress of Masada is currently so dry and forbidding that is hard to imagine anyone living there. Was the climate in the surrounding area more wet 2000 years ago, or was it as much a ...
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1answer
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Identifying a desert landform
I saw this landform on Google Earth on the border of Algeria/Tunisia/Libya and wondered what it is called (so that I can read up on it and find out how it forms - I am not a geologist):
Here is a 3D ...
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1answer
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Why do the vast majority of the world's deserts fall on the tropic of capricorn or cancer?
I noticed on google maps today that the earth has two very distinct regions on which the majority of deserts are located. These fall on the tropic of capricorn and cancer. Illustrated here:
What ...
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2answers
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Desalination and Weather Impact?
I have a question I've always been curious about regarding the topic.
As I understand it, the desalination process is that they take the salt water, create usable water from it and then salt sludge ...
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1answer
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Large scale structures in the Sahara – what are they?
In Google Earth we can see some very clear lines in the Sahara. In the screenshot below you can clearly see these lines starting at the top going southward, then gently curving westward towards the ...
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0answers
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Desert greening - Do we have long term (several decades) data on precipitation around the Sahara?
This article of desert greening states that some areas around the Sahara have seen increased plant growth in recent decades, caused by global warming. The causal chain would be warmer air can hold ...
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Where did the sand in the Sahara come from?
If the Sahara used to be fertile and has since experienced minimal rainfall causing the current desert conditions, where did all the sand come from?
I assume the original dirt is still there, just ...
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4answers
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What would be the effect of bringing seawater pipes to the Sahara desert?
This is a childhood dream.
What would happen if pipes were installed (similar in principle to the Great Man-Made River, but for seawater) to continuously pump seawater into the Sahara desert.
Let'...
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3answers
853 views
In general, does the presence of vegetation increase/decrease gross water loss (evapotranspiration) compared to barren land (evaporation only)?
I am doing some literature review on desertification. However, I could not find any information related to my question. Based on my knowledge, barren land faced greater heating and wind than vegetated ...
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Is there a buildup of static electricity in a sandstorm?
In a sandstorm, is there a buildup of static electricity? If so, does that produce lightning strikes? Also if you were to be inside the storm what would the build of that level of static feel like?
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Seeking details for the "historical rate" of arable land loss
In doing research on the issue of desertification (aka land degradation) I keep running across the same basic sentence but no source or detail to support or clarify it:
"Arable land loss is ...
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1answer
128 views
Possibility to influence oceanic evaporation to protect Sahel/Sahara [closed]
When reading about the projects that want to plant trees on the Sahel-Sahara border, for protection of the Sahel, I wonder what other possibilities there are.
Like, would it be possible to influence ...
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1answer
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Why is the Sahara so much larger than the other horse latitude deserts?
Every continent has a dry strip between about 15º and 35º on its west coast, but they vary drastically in size:
The Baja/Mojave and Atacama are fairly narrow, stretching about 300 miles inland at the ...
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1answer
126 views
Cell Size of Salt Pan Tessellations
Salt Pans (such as in Badwater Basin of Death Valley, California) often show a tessellation pattern which forms presumably due to contraction of the deposited salt crust forming irregular cracks ...
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1answer
250 views
How important is Sahara dust for the Amazon?
A recent article by Yu et al. estimated that 28 million tons of dust from the Sahara fall to the surface over the Amazon basin per year out of the 132 million tons that remain in the air when the dust ...
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2answers
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What are these lake-like blue patches in the desert, visible in satellite image?
I found some blue patches in the Arabian desert in Google Earth. It looks like as if they were lakes with sand dunes rising out of the water. But there isn't water in the desert, at least not this ...
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1answer
356 views
What is this strange feature on Mars in Valles Marineris
While I was browsing Mars on Google Earth, I stumbled upon an interesting feature on one of the slopes of Valles Marineris. The feature seems unique in the sense that I couldn't find any similar ...
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How will climate change affect the extent of the Sahara Desert?
Will it increase the size of it? (perhaps by increasing the extent of the Hadley Cells)?
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1answer
142 views
Does over-cropping large areas really change the amount of rainfall?
I heard that at one time the Sahara desert was cropped in wheat for the Roman Empire, and that cropping without adding back to the soil was what caused the desert to form. I also heard that this is ...
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1answer
209 views
Fine particulate matter - Why the lack of attention? What can be done to tackle it?
If fine particulate matter as a pollutant from industrial or natural sources (e.g. a desert) can be such a cause for concern in terms of (further) desertification as well as health impacts, is there a ...
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1answer
339 views
Are sandstorms like regular storms?
What's the difference between sandstorms and regular storms? Are they more than just strong wind within deserts?
