Please do leave feedback on the website by emailing me at bethan@antarcticglaciers.org or by leaving a comment in the comments box.
Best wishes,
Bethan
Please do leave feedback on the website by emailing me at bethan@antarcticglaciers.org or by leaving a comment in the comments box.
Best wishes,
Bethan
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I was trying to update my old estimate of total sea rise if all the ice in the world melted.
Your site, and the name seemed promising. I found some scattered reasonable numbers but they were hard to find.
I suggest that a summary page of “What if all the ice melted?” would be helpful:
All the Glaciers 405 mm or 0.405 m
Greenland 7.2 m
Antarctica 58 m
Total 65.6 m ( 215 ft) more or less
The title of https://www.antarcticglaciers.org/glaciers-and-climate/what-is-the-global-volume-of-land-ice-and-how-is-it-changing/ contains the question: “What is the global volume of land ice”, but I cannot find the answer to that question on the very same page.
Therefore I repeat the question: What is the global volume of land ice?.
And by volume I mean volume, not SLE’s or percentage or whatever.
It would be even better if you could answer: What is to global mass of land ice? Of course now I mean kilograms or gigatonnes or teratonnes.
https://www.antarcticglaciers.org/glaciers-and-climate/ice-cores/ice-core-basics/ it says: “An example of using stable isotopes to reconstruct past air temperatures is a shallow ice core drilled in East Antarctica[10]. The presence of a “Little Ice Age”, a cooler period ending ~100 to 150 years ago, is contested in Antarctica.”
Surely the “Little Ice Age” was just a few hundreds years ago 1300-1870. https://www.eh-resources.org/timeline-middle-ages/
Question about the “Melt layers” https://www.antarcticglaciers.org/glaciers-and-climate/ice-cores/ice-core-basics/
How is the amount/number of melted layers calculated? And how is the temperature of the air and its GHG content during the period measured?
The text says: “Shallow ice cores (100-200 m long) are easier to collect and can cover up to a few hundred years of accumulation”
Peter Neff then says: “For the gases contained in air bubbles in the ice, that continuity to today is somewhat complicated by the fact that bubbles don’t completely close and become isolated from the atmosphere until they are buried by 50-100 meters of snow and ice.”
So – how recent temperatures and air composition do you trust? Back to the 1800s?