These are usually waters that generally produce intermediate waters.
In general we have intermediate water formation.
This is indicating the Mediterranean.
In the Mediterranean they are deep waters within the Mediterranean basin,
the same as in the Red Sea.
It produces deep water within the Red Sea basin
then when they leave for Bab el-Mandeb and they are occupying.
In the Arabian Sea they are located at a certain depth
above what the background is.
And the same thing happens in Mediterranean when water leaves for Gibraltar.
Pre-conditioning.
What does pre-conditioning mean?
Means the conditions to which the surface water has to reach
so that with a relatively small disturbance.
That is, with a cooling,
with a loss of heat or a relatively small increase in salinity.
There is a jump that causes the water to go to the bottom.
So what does it mean?
The greater the density that we have in surface in the winter season.
That is the time in which the formation of depth is usually given,
I said before.
Except in some very specific and specific cases that have their interest.
But they have no value from the point of view of the amount of water they produce.
For what we have here, we have red values that correspond
to areas where in winter maximum densities are reached.
Note that they are, in general, areas of the North Atlantic.
We obviously have the entire Antarctic circumpolar zone.
Some points near Siberia in the Pacific,
but really much smaller in the Pacific.
And, instead, we see it here, despite being in the Arctic.
We have that density is low, just as it is in equatorial areas.