4 ms·

No idea. But the interesting fact is, that regardless of the depth (assuming that iceberg was afloat already before the separation), it will not increase ocean

by nuccy 5y ago

No idea. But the interesting fact is, that regardless of the depth (assuming that iceberg was afloat already before the separation), it will not increase ocean level at all. Melting of on-land snow and ice/glaciers leads to global ocean level rise, not those icebergs afloat. Antarctica is a fascinating place: driest place on earth, so that grounding of any electrical equipment is needed (which is very challenging, since ice thinkness is of few kilometers).

ansible 5y ago
While everything you said is correct, we should all be aware that the existence of floating ice tends to hold back the glaciers that are on land. Without the floating ice, those glaciers will flow more rapidly off into the ocean, and that will increase the average sea level.
- nuccy 5y ago
  Indeed, glaciers are literally ice-rivers [1], they flow from mountains down. Melting downstream near the sea/ocean will accelerate their disappearance and yield to global oceal level increase. Ronne Ice Shelf is like an ice-gulf, melting and separation of icebergs reclaims the ice allowing water getting deeper and deeper into Antarctica. [1] https://youtu.be/he5QzhE7_g4?t=16 https://youtu.be/he5QzhE7_g4?t=16
nuccy 5y ago
Update: since Ronne Ice Shelf, from which A-76 separated, has ice thickness of about 150 meters [1], if A-76 has the same level above the water as the Ice shelf, about the same surface underwater (which likely is not the case, but good enough for this rough estimate), then 9/10 of the whole iceberg volume is underwater, meaning that the depth underwater is about 1.3 km. Though the area of the iceberg usually increases underwater and the depth in that place is just about 500m[2], so likely it is something like that. [1] https://www.britannica.com/place/Ronne-Ice-Shelf https://www.britannica.com/place/Ronne-Ice-Shelf [2] https://tc.copernicus.org/articles/12/453/2018/tc-12-453-2018-f01-web.png https://tc.copernicus.org/articles/12/453/2018/tc-12-453-201...
asaddhamani 5y ago
Why does dryness mean electrical equipment has to be grounded?
- lmilcin 5y ago
  Because static electricity is generated whenever objects touch, whenever wind touches an object, etc. Normally some objects can dissipate the charge if they are conductive (for example a tree). But many man made objects do not conduct at all or are isolated from ground (for example car is isolated through non-conductive tires). For these objects, humid air helps slowly dissipate the charge, but when humidity is below 30% this dissipation becomes very slow process and a large amounts of charge can accumulate. I have home electronics lab and I keep a humidifier and ionizer to provide humidity and ions to dissipate any charges that can accumulate on any objects (like me).

by nuccy 5y ago

ansible 5y ago

While everything you said is correct, we should all be aware that the existence of floating ice tends to hold back the glaciers that are on land. Without the floating ice, those glaciers will flow more rapidly off into the ocean, and that will increase the average sea level.

nuccy 5y ago
Indeed, glaciers are literally ice-rivers [1], they flow from mountains down. Melting downstream near the sea/ocean will accelerate their disappearance and yield to global oceal level increase. Ronne Ice Shelf is like an ice-gulf, melting and separation of icebergs reclaims the ice allowing water getting deeper and deeper into Antarctica. [1] https://youtu.be/he5QzhE7_g4?t=16 https://youtu.be/he5QzhE7_g4?t=16

nuccy 5y ago

Update: since Ronne Ice Shelf, from which A-76 separated, has ice thickness of about 150 meters [1], if A-76 has the same level above the water as the Ice shelf, about the same surface underwater (which likely is not the case, but good enough for this rough estimate), then 9/10 of the whole iceberg volume is underwater, meaning that the depth underwater is about 1.3 km. Though the area of the iceberg usually increases underwater and the depth in that place is just about 500m[2], so likely it is something like that. [1] https://www.britannica.com/place/Ronne-Ice-Shelf https://www.britannica.com/place/Ronne-Ice-Shelf [2] https://tc.copernicus.org/articles/12/453/2018/tc-12-453-2018-f01-web.png https://tc.copernicus.org/articles/12/453/2018/tc-12-453-201...

asaddhamani 5y ago

Why does dryness mean electrical equipment has to be grounded?

lmilcin 5y ago
Because static electricity is generated whenever objects touch, whenever wind touches an object, etc. Normally some objects can dissipate the charge if they are conductive (for example a tree). But many man made objects do not conduct at all or are isolated from ground (for example car is isolated through non-conductive tires). For these objects, humid air helps slowly dissipate the charge, but when humidity is below 30% this dissipation becomes very slow process and a large amounts of charge can accumulate. I have home electronics lab and I keep a humidifier and ionizer to provide humidity and ions to dissipate any charges that can accumulate on any objects (like me).