| Alistair 2008-02-27, 6:55 pm |
| On 27 Feb, 06:46, Arnold Trembley <arnold.tremb...@worldnet.att.net>
wrote:
>
> With continental drift the north pole is currently landlocked and does
> not have free-flowing ocean currents while the south pole is currently
> covered by a continental land mass. If there is open ocean at both
> poles there will be no ice at the poles.
>
This rankles a little with me. There are currents that head up towards
the Arctic (North Atlantic Drift Current heads that way) and, even
though ocean currents are normally caused by wind action at the
surface, I find it difficult to believe that there are no currents in
the Arctic. However, I couldn't find any info.
A quick browse came up with this nugget on an exam paper:
<quote>
The temperature of the deep ocean generally hovers around freezing
(2=B0C to 3=B0C). However, scientists have discovered that about 60
million years ago, the temperature of the deep sea was 20=B0C. That's
just a little  er than average room temperature (24=B0C)! What could
be responsible for the change in ocean temperature described
here?
</quote>
Of course, 60 million years ago was before the invention of the
thermometer ;-)
|