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21 votes

Is there any explanation for the large amount of sea ice around Antarctica in 2014?

Antarctic sea ice extent for April 2014 reached 9.00 million square kilometers (3.47 million square miles), the largest ice extent on record by a significant margin. Is there any explanation for ...
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20 votes

Why deep ocean didn't freeze during snowball Earth?

At least four things combined to prevent solid freeze-up during Ice/Slush Ball Earth periods: It takes a lower temperature to freeze water under pressure. Deep sea pressures are enormous. Ice ...
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14 votes
Accepted

Is the Arctic sea ice volume increasing?

This question has already been answered on Skeptics.SE: Did the Arctic Ice Sheet grow by 60% from 2012 to 2013? The short answer is that those two graphs are consistent with each other. The first ...
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14 votes
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Why deep ocean didn't freeze during snowball Earth?

What makes you think Geothermal energy and underwater volcanoes are too weak? The mid-oceanic ridge system alone is 50000 miles long. The mean heat flow at the surface (91.6 mW/m2) has to be ...
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  • 2,361
11 votes

Why have "ozone-depleting substances" led to a third of all global warming and half of arctic sea ice loss?

The Global warming potential (GWP) describes how much global warming a particular gas may induce in a particular time period. It is often expressed in terms of CO₂-equivalent. The best known ...
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9 votes
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How much of the underwater land masses within the arctic ocean is considered continental shelf?

Yool & Fasham in An Examination of the Continental shelf pump in an open ocean general circulation model Global Biogeochemical Cycles Volume 15, Issue 4, pages 831–844, divide the continental ...
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  • 5,892
9 votes

Is there any explanation for the large amount of sea ice around Antarctica in 2014?

(Note: this is based on what I found in literature. Sea ice is not my expertise.) Short answer: We don't know. It may be related to changes in atmospheric temperature, wind stress, precipitation, ...
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  • 11.1k
9 votes
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Is this 70km crack in an ice shelf of Antarctica remarkable, or a regular occurrence?

Is an iceberg the size of Delaware [6,451 square kilometers] actually remarkable, or something that just happens from time-to-time? In March 2000 iceberg B-15 formed which was 11,000 sq. km. and 295 ...
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  • 5,892
8 votes

Is this 70km crack in an ice shelf of Antarctica remarkable, or a regular occurrence?

Developing since 2014, the crack was projected in 2015 to lead to "the largest calving event since the 1980s," according to this report in The Cryosphere journal by glaciologists studying the region. ...
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  • 2,803
8 votes
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How much of arctic ice is from snow fall versus frozen sea water?

I'm assuming this question is asking about the sea ice in the Arctic Ocean as opposed to ice caps such as that over Greenland. The sea ice on the Arctic Ocean is predominantly (overwhelmingly!) frozen ...
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7 votes

What are the approximate dimension of this iceberg? Any chance the ratio is 1:4:9?

Not likely. Quoting Kelly Brunt, an ice scientist with NASA and at the University of Maryland, from What the Heck Is the Deal with This Weird, Square Iceberg? at LiveScience.com: What makes this ...
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  • 2,625
7 votes

Is the Arctic ice dissapearing faster than IPCC models say?

The IPCC said "Although the Hadley Centre climate model underestimates sea-ice extent and thickness, the trends of the two models are similar. Both models predict continued decreases in sea-ice ...
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6 votes
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Did the surfaces of the oceans freeze over entirely during the snowball Earth periods?

By looking at the recent literature on the question, I see neither a consensus or a definitive answer on the extent of the snowball earth. Since the Neoproterozoic Snowball Earth event is more recent,...
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6 votes
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Need help understanding this satellite image of Larson C ice shelf

I found a natural-color image of the same area: 68.28 South, 60.47 East, North is up, resolution is 130m/px, which makes the whole image about 100 km x 100 km. Looking at the image i'd say that: sea ...
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  • 176
5 votes
Accepted

What are the approximate dimension of this iceberg? Any chance the ratio is 1:4:9?

There have been rectangular tabular icebergs in the past so this is not uncommon at all. Kelly Brunt, an ice scientist with NASA and the University of Maryland said: Tabular icebergs form, she ...
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5 votes

Why have "ozone-depleting substances" led to a third of all global warming and half of arctic sea ice loss?

Do these "ozone-depleting substances" also have infrared-absorbing greenhouse impact unrelated to their ozone-depleting chemistry, or is the story more complex? Yes, the paper (I have access) ...
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  • 684
5 votes

Is the Arctic sea ice volume increasing?

Few things to notice are that while the Arctic Sea volume increased 50%, the volume increase was marginal compared with the volume of sea ice in 1979. Next, if you review the graph below, one year ...
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  • 4,561
5 votes

Is ice also created ín cold water of the oceans?

The National Snow and Ice Data Center website describes the process of ice formation on polar oceans. Virtually all of the young ice is made from ocean water which retains some brine in the process of ...
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  • 5,667
5 votes
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Would freezing the ocean and storing the ice in the poles reduce effects of climate change or sea level?

There are a couple of different questions in there -- one is whether this would help with sea level rise, the other whether this would help with temperature increase. (The second part is easy to ...
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  • 2,803
4 votes

Is ice also created ín cold water of the oceans?

So I'm not asking about snow what is pressed into ice on the poles. Snowfall is obviously important for the ice that overlies Greenland and Antarctica; snowfall is the only source for ice on land. On ...
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4 votes
Accepted

Is it possible to create ice in poles?

It depends on which pole. The south pole is in the middle of Antarctica, with mean temperatures of -57°C, liquid water doesn't exist there and the air is extremely dry. Therefore, I would say that it ...
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4 votes

Is the Arctic sea ice disappearing in a linear or non-linear way?

The box in the lower left of the bottom chart is key to understanding what is presented. Five attempts of a line of best fit have been presented. From the chart, the linear fit (yellow line) is the ...
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  • 20.3k
3 votes

Is the Arctic sea ice disappearing in a linear or non-linear way?

There are no "True" curves in the extent that there is no theory or physical laws that link the number of years with the disappearing of arctic ice. (These several curves are only interpolation models,...
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3 votes

Did the surfaces of the oceans freeze over entirely during the snowball Earth periods?

There is no consensus, but educated opinions. I tend to think that they did not freeze over. Some interesting arguments are given by Dorian Abbot in his paper where he first published about the ...
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3 votes

Why deep ocean didn't freeze during snowball Earth?

The water has an uncommon property: at 4°C it's heavier(most dense) that at 0°C. This makes ice floats on surface and ice is a good thermical isolator, preventing the water below freezing.
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  • 173
3 votes

Is there any explanation for the large amount of sea ice around Antarctica in 2014?

I looked at trends in Antarctic sea ice extent in the satellite era from 1979 to 2015 for both the summer minimum (February) and the winter maximum (September) and did not find a statistically ...
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3 votes
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How do we know the Arctic is just ice?

The sea floor has been mapped using sonar from ships as shown here, and radar. But the fact was first discovered long before these technologies existed by sailors who got stuck in the ice. The entire ...
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3 votes

How do we know the Arctic is just ice?

The Arctic has already been explored extensively by people traversing over the ice, by air and by naval submarines. On August 3, 1958, the American submarine USS Nautilus (SSN-571) reached the North ...
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  • 20.3k
2 votes

Is Antarctic sea ice at record levels?

In my survey of sea ice extent for the same period (1979-2015) I found that the apparent positive trend in dispersed sea ice in the Antarctic in September is anomalous and possibly spurious for two ...
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