I should clarify that water does not necessarily need to be less dense to rise if it's being displaced by water at a greater pressure gradient, but it's still statistically more likely for cold water to
sink than warm water.
Not exact matches
Warm water is less dense
than cold
water, so the cold
water in the
water balloon was more dense
than the hot
water and so
sank.
That deep
water is not only rich in nutrients, it also has relatively high concentrations of carbon dioxide, both because it is cold (cold
water can absorb and hold more carbon dioxide
than warm water) and because the decomposition of organic matter that
sinks into the depths releases carbon dioxide.
Use
warm water and a
sink or basin rather
than a bathtub will keep the dog more confined.
(PS regarding Venus — as I have understood it, a runaway
water vapor feedback would have occured when solar heating increasing to become greater
than a limiting OLR value (Simpson - Kombayashi - Ingersoll limit — see http://chriscolose.wordpress.com/2010/08/23/climate-feedbacks-part-1/ — although I should add that at more «moderate» temperatures (
warmer than today), stratospheric H2O increases to a point where H escape to space becomes a significant H2O
sink — if that stage worked fast enough relative to solar brightening, a runaway H2O case could be prevented, and it would be a dry (er) heat.
But since you bring it up, basic chemistry tells us that the marine
sink will diminish with
warming, since
warmer waters take up less CO2
than cooler ones.
temperature of the
water — cold
water is more dense
than warm water, so it
sinks.
A greater -
than - normal volume of
warm salty tropical
water was transported north with the current and this was drawn down into the ocean in the region around 60 ° N - where dense
water sinking occurs.
The deep
waters, being
warmer than such surface
waters, rise to the surface, as the upper layers
sink slowly into the dark ocean depths.
Everything else being equal,
warm water has a lower density
than cold
water and won't
sink into the deep cold oceans.
Salt
sinking on such a grand scale in the Nordic Seas allows
warm water to flow much farther north
than it might otherwise do.
Craig, the x +1
water can't
sink unless the surface is
warmer & less dense
than it was previously.
Cold
water will
sink, moving
warmer water upwards, or along in a current until it reaches a position where it's less dense
than the
water above, at which point it rises.
Eventually the surface
water became denser
than the
warming deep
water and started to
sink, causing the corrosive deep
water mass to spill over the ridge — overflowing the «giant bath tub».
Being denser
than warm water it then
sank and flowed out along the bottom of the ocean in deep ocean currents, eventually filling the depths of the ocean basins around the world.
You would not expect
warmer water to
sink in the N. Atlantic, but evidently increased salinity due to evaporation is a stronger effect
than water temperature