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Glaciers
Glaciers are large, dynamic bodies of ice that form over long periods of time when snow accumulation exceeds ice ablation. They are among the most significant forces shaping Earth's landscape over long time scales. Glaciers are currently found at Earth's poles and in mid-latitude and equatorial mountains.
1,124 Questions
Why are scientists concerned about the disappearing glaciers?
Scientists are concerned about disappearing glaciers because they are a key indicator of climate change. The melting of glaciers contributes to rising sea levels, which can lead to coastal flooding and impact ecosystems. Additionally, glaciers play a critical role in providing freshwater resources to communities around the world.
What is air pressure at Denver Colorado?
Air pressure is measured in different ways. Two common ones are PSI (pounds per square inch) or a barometer which measures in column inches of mercury. As we know the barometer goes up and down with weather so the air pressure goes up and down. The highest barometer reading ever recorded is about 32 inches or just over 15.6 PSI. The lowest barometer reading ever recorded was 25.69 in the middle of a hurricane so this is not typical but equates to about 12.5 PSI. These are all sea level readings. So we need an average, or normal. The standard is a barometer of 29.92 which equates to about 14.7 PSI, again being a sea level reading. With that standard the pressure at Denver is 12.1 PSI or a barometer of about 24.63. At this pressure water boils at about 202F instead of 212F.
Why does snow that forms glaciers change to ice?
The snow changes the ice because in order to create the large mass of ice the temperature must freeze the huge clump of snow into a large mass of ice, thus creating the glacier, and so forth the glaciers would then be considered the large mass of ice that was meant to be formed.
Was long island formed by glaciers?
weathering and erosion the glacier used abrasion and then all of the rocks would be taken away by erosion
How much snow is needed to from a glacier?
All i can tell you is a lot! Probably tons of snow is needed. Glaciers are frozen water and ice. They are very big in size. They continuously move but they move at a slow pace. It takes a very long time for them to form. Also many glaciers are fresh water. Hoped this helped you!! I also threw in some fun facts there! lol
What are hills left by glaciers?
Glaciers push up mounds of dirt as the advance forward.
When they recede, they leave these mounds of earth, debris and rock
What are these mounds called? In my ancient memory, I thought they were called doldrums, but this doesn't seem to be right judging from the responses I have obtained from this site.
The hills are called moraines or just a moraine.
Was there a time with less glaciers?
Yes, during the Carboniferous period (i.e. the time when most of our coal resources formed) the levels of carbon dioxide in the atmosphere were much much higher than they are now. This produced a greenhouse effect so strong that not only did the glaciers melt away but there was also no polar icecaps!
What can happen when the glacier melts in a cirque?
the glacier dropped small rocks as it melted. An erratic is a large boulder left behind after a glacier has melted
Glacial till is unsorted sediment deposited directly by glacial ice.
What occurs when overhangs from a glacier break off and fall into the ocean?
When overhanging glacier ice breaks off and falls into the ocean, it creates icebergs. This process is known as calving. The icebergs can vary in size and can pose a hazard to ships navigating the area.
What caused the dark bands in the glaciers?
Atmospheric depositions of SOOT - particles of solid carbon - from [combustion] Sources Worldwide!
The UK has no glaciers today. why not?
the UK has no glaciers because it takes so long to make one and you need really cold weather all year round and the UK gets really hot.
How would the geography of the northeast be different if glaciers had not once covered the region?
That is impossible to answer. There is nothing to compare the Earth to if that scenario happened.
Where did Hubbard Glacier get its name?
August 1940 Lafayette Ronald Hubbard was sailing in front this Glacier on a US hydrographic survey mission
What are examples of the damage glaciers do?
They very rarely do ANY "damage"!
The only instances I can think of are events called Jokhulhaups (Spelling? - any Icelanders here?) - an Icelandic word for the sudden and catastrophic thawing of a glacier or ice-sheet by a volcanic eruption under it.
The resulting flood will rip up roads and bridges etc - so no-one in Iceland builds anything more than those where it may happen.
There have been smaller-scale but much more humanly-destructive, slightly similar events where eruptions have melted summit snow on volcanoes, creating violent mud-rivers that overwhelm anything in their path.
And of course, people who venture onto glaciers have been known to fall into crevasses.
But on the whole, glaciers do not "damage" anything. They are an integral but temporary part of their landscape which they are shaping!
What are some deposits of alpine glaciers?
Some deposits of alpine glaciers include moraines (such as lateral, medial, and terminal moraines), drumlins, eskers, and outwash plains. These deposits are created as the glacier erodes, transports, and deposits sediment during its movement.
Is Glacier water that is purchased out of vending machines flouridated?
Not unless it says "Fluoride" somewhere on the bottle. If it is truly spring or glacier water it has no fluoride added naturally.
If you're asking about the "Glacier" branded vending machines found outside of supermarkets, they do not dispense water from glaciers. They are connected to municipal water supplies. They use a multi-step purification process to purify the tap water. One of the steps in their purification process is reverse osmosis. Reverse osmosis can be effective in removing fluoride from water. It's likely that some percentage of the fluoride added to municipal water supplies will remain. How large a percentage depends on the type of membrane used in the process.
What happened to glaciers around the world over the 30-40years?
All glaciers have been shrinking in the last 40 years/ Some say it is global warming. It is debatable if it is a natural cycle or caused by human interference.
