With the summer sea ice extent reaching its lowest point in decades, many observers are starting to worry about what could happen when sea ice disappears completely.
But what is the extent of Arctic sea ice?
And how does it compare to other parts of the world?
This is a question that’s being asked increasingly as the melting season heats up and as the Arctic warms.
The extent of sea ice varies from region to region.
The extent of the sea ice around Greenland is generally around 0.1 to 1.0 meters, while that around the North Pole is around 2.5 to 5 meters, said Dr. Marc Eisenberg, a glaciologist at the Woods Hole Oceanographic Institution in Massachusetts.
But that difference is due to differences in how much water is available to melt.
In the Arctic, ice cover is the largest, most important factor for how much ice there is.
That means ice is the most likely to disappear.
But the amount of ice depends on how much snow and ice are there, as well as how deep the ice is.
In the summer, the amount depends on the amount and extent of snow and the thickness of the ice.
But in the winter, the amounts and extent are directly related to how much sea ice is in the water.
The Arctic sea-ice extent is also different depending on the season.
It’s more stable at the summer time, but the extent varies throughout the year.
The Arctic summer sea-age is the lowest in the Arctic because that’s when the ocean is more open and the water temperature is lower.
At this time of year, it’s the same as during the winter.
In summer, it drops to its lowest at the end of September and the beginning of October.
The summer sea level is the highest in the summer because that means the amount in the sea is higher.
In summer, this year’s sea-level rise has already made the northern part of Greenland almost uninhabitable for most of the year, and that’s because it’s melting so quickly.
That’s because the meltwater from Greenland is being stored in the ice shelf, and then when the meltwaters recirculate out into the ocean, they make up about half of the volume of the ocean.
In winter, it is more of a concern for the northern parts of Greenland because the melting ice is more quickly and is much larger than in summer.
In other words, the summer extent is smaller and the winter extent is bigger, but both of them are still smaller than the winter sea- ice extent in the southern part of the polar region.
So that’s why summer sea extent is lower in the northern half of Greenland.
And, in winter, because of the loss of snow, it becomes larger and larger in the other part of winter.
This summer sea Ice extent in Greenland is also smaller than other parts in the world.
This summer sea levels are around 2 to 3 meters higher than in the past summer.
The last summer sea height was about 1.3 meters, according to a 2014 study.
That is higher than any other summer sea rise in the history of the planet.
But the summer area of sea-levels has increased in recent years.
This year, the Arctic is experiencing a record-breaking summer sea event that scientists are calling the summer meltwater surge.
That event has also been associated with a significant increase in sea level.
This is the summertime event when the melting of the snow cover melts the sea.
The meltwater is carried over land to the sea, where it freezes into ice.
When the sea level rises, it can cause flooding and erosion in coastal areas, which is what happened in the Southern Ocean in 2009 and 2010.
The Southern Ocean is the ocean that runs from the North Atlantic to the Indian Ocean.
The Northern Ocean is where most of North America and parts of Europe, Australia and the Pacific Islands are located.
The new meltwater spike in the summers has been the most significant event of its kind on record, Eisenberg said.
The new event has already contributed to significant sea level rise, and it will likely contribute to further increases over the coming months.
But scientists are still waiting to see how much meltwater can actually be released from the melt in the ocean to the ocean in the air.
The sea ice in the region has been increasing, but it’s still not as large as in previous summers.
In fact, it was down about 20 centimeters (8 inches) this year.
This sea ice has been retreating in the last year.
There is a lot of floating ice on the surface of the water, so the sea- level rise is higher this year because of this floating ice.
The average summer sea depth in the Antarctic is about 3.6 meters (9 feet), which is similar to the average summer depth in summer in summer, Eisenberger said.
That average depth has increased from 2.3 metres (6 feet) in 2010 to 3.7 metres (9.5 feet) this summer.
In comparison, the average depth of the