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 ...
gerrit's user avatar
  • 11.7k
10 votes
Accepted

Does melting sea ice rise the global sea level?

"Sea ices" - if referring to all kinds of ice floating in oceans - is not the same as "sea ice"; sea ice is specifically referring to seawater that has frozen and the total amount ...
Ken Fabian's user avatar
  • 2,121
9 votes
Accepted

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 ...
DavePhD's user avatar
  • 5,972
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. ...
jeffronicus's user avatar
  • 3,492
8 votes
Accepted

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 ...
David Hammen's user avatar
  • 23.6k
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 ...
Jan Doggen's user avatar
  • 2,679
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 ...
Keith McClary's user avatar
7 votes

Does melting sea ice rise the global sea level?

With two exceptions, the answer is no. Sea ice forms from seawater. Sea ice forms from early autumn to early spring but then melts from early spring to early autumn. If there is any change in volume ...
David Hammen's user avatar
  • 23.6k
6 votes

Does melting sea ice rise the global sea level?

The short answer is No. If you want proof fill a glass to the brim with water. Place an ice cube in the water and wait for the ice to melt. Water will not overflow the glass. The ice that is on land, ...
Fred's user avatar
  • 24.7k
6 votes
Accepted

Were sub-sea river channels formed when the land was above sea level?

Can it be concluded, based on this picture alone, that the channel was formed when the entirety of it was above sea level? In other words, is that the most plausible known mechanism for the formation ...
David Hammen's user avatar
  • 23.6k
6 votes
Accepted

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 ...
mkadunc's user avatar
  • 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 ...
Rory Alsop's user avatar
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 ...
userLTK's user avatar
  • 5,857
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) ...
y chung's user avatar
  • 704
4 votes
Accepted

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 ...
jeffronicus's user avatar
  • 3,492
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 ...
Camilo Rada's user avatar
  • 17.7k
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 ...
David Hammen's user avatar
  • 23.6k
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 ...
Fred's user avatar
  • 24.7k
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 ...
Chris Rackauckas's user avatar
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 ...
Fred's user avatar
  • 24.7k
3 votes
Accepted

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 ...
timthelion's user avatar
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,...
Stephane Rolland's user avatar
2 votes

How do we know the Arctic is just ice?

You can study the many maps, it seems there is a giant ridge foming but the ice grinds it faster than it rises. Icebergs are grinding the arctic deeper than sea level, like 300/400 meters deep, also ...
bandybabboon's user avatar
  • 1,349
1 vote

How cold would the Earth have to be for the oceans to freeze entirely?

I imagine it is difficult for the ocean to freeze solid due to the low freezing point of saltwater and the insulating effect of the formation of sea ice over the cool but still liquid ocean water. It ...
Tardy's user avatar
  • 574
1 vote

How reliable is sea-ice concentration (fraction) data in ERA-Interim?

I would recommend changing from ERA-Interim to ERA-5, since ERA-Interim will be outdated soon. This is the information currently given by the data provider: ERA Interim is being phased out. Users ...
Basileios's user avatar
  • 407
1 vote
Accepted

How can every ton of CO2 cost 3 square meters of summer sea ice per year - quantitatively?

First lets take the question at face value and do the simple comparison. I will take the years 1979 and 2016 as arbitrary example, over a 37 year period - the longest for which accurate data are ...
Gordon Stanger's user avatar

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