# Temperature need to melt this ice in 400 years

How much temperature is needed to melt ice -30C that covers an area of 34 million km2 and has the height of 11.4 km in 400 years? For example, X number of celsius degrees are applied non-stop for 400 years in order to melt this ice entirely from the surface (turn to water)

Quantum Defect
Homework Helper
Gold Member
How much temperature is needed to melt ice -30C that covers an area of 34 million km2 and has the height of 11.4 km in 400 years? For example, X number of celsius degrees are applied non-stop for 400 years in order to melt this ice entirely from the surface (turn to water)

Heat melts ice, not Temperature.

Heat melts ice, not Temperature.
Alright, heat then.

phinds
Gold Member
How much temperature is needed to melt ice -30C that covers an area of 34 million km2 and has the height of 11.4 km in 400 years? For example, X number of celsius degrees are applied non-stop for 400 years in order to melt this ice entirely from the surface (turn to water)
You need to show some work of your own, you can't just come here and ask for an answer. That's not the way the forum works. You should read the rules. If you don't follow them, you run the risk of your post just getting deleted (or closed).

haruspex
Homework Helper
Gold Member
2020 Award
Heat melts ice, not Temperature.
Not so fast. The question specifies a time period and that the heat is applied at the surface. It also explicitly mentions degrees C. So it might really be looking for a surface temperature which, if sustained, would melt all the ice in that time.
On the other hand, there are two snags with that interpretation:
1. The area would not matter
2. If you literally were to sustain a temperature > 0C then the surface layer would melt instantly. If that were to run off instantly, then the next ice would melt instantly, etc. So you'd have to suppose a certain depth of water at any time and consider the heat flow through it.
Aleksa, have you stated the question word for word as presented to you?