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Temperature need to melt this ice in 400 years

  1. Jan 28, 2015 #1
    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)
     
  2. jcsd
  3. Jan 28, 2015 #2

    Quantum Defect

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    Heat melts ice, not Temperature.
     
  4. Jan 28, 2015 #3
    Alright, heat then.
     
  5. Jan 28, 2015 #4

    phinds

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    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).
     
  6. Jan 28, 2015 #5

    haruspex

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    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?
     
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