If the warm water heated by the sun is driven by the wind into the deeper layers, and also
bringing colder deep waters to the surface, the surface stays cool, the heat is transferred down, and La Nina works its cooling magic on the globe.
Stronger trade winds push warm surface water towards the west, and
bring cold deeper waters to the surface to replace them.
Not exact matches
Scientists aren't sure why the blob formed, though many blame a ridge of high pressure that
brought sunnier weather and less mixing of surface
water with
colder,
deeper water.
The fog is a gift of the Pacific Ocean's California Current where winds create upwellings that
bring cold,
deep, nutrient - rich
waters to the surface.
Intense trade winds and strong uppwelling along a region near the equator, known as the
cold tongue and caused by Ekman pumping,
bringing up
cold and nutrient
water from the
deep sea.
Furthermore, a
deeper upper layer of warm surface
water may weaken the
cold tongue if the Ekman pumping doesn't reach down below the thermocline to
bring up
colder water, and weakened trade winds would have a similar effect through reduced Ekman pumping near the equator.
With the removal of the warm surface
waters, an upwelling current is created in the east Pacific Ocean,
bringing cold water up from
deeper levels.
One possibility is that the
deep melt is
brought to the surface somehow, in which case the surface
waters actually get
colder again, leading to much greater summer ice rather than less.
Intense trade winds and strong uppwelling along a region near the equator, known as the
cold tongue and caused by Ekman pumping,
bringing up
cold and nutrient
water from the
deep sea.
Furthermore, a
deeper upper layer of warm surface
water may weaken the
cold tongue if the Ekman pumping doesn't reach down below the thermocline to
bring up
colder water, and weakened trade winds would have a similar effect through reduced Ekman pumping near the equator.
I have to raise an objection to the phrase «the only region of the world that has defied global warming» — that might be neglecting a certain area in the Pacific where England 2014 has identified a very obvious point where the «Pacific conveyor» was
bringing in the last decade up a lot of
cold water from the
deep ocean and has possibly played a major role in the specific trends for that period.
Marine biological activity then transfers a bit more C to the
deep ocean than
cold, upwelling
waters bring back up, such that the net sink to the
deep ocean is about 1.6 GtC / yr, and much slower permanent removal in sediments.
In Washington and Oregon, oysters farms are in coastal Pacific
waters where upwelling currents are
bringing up
cold,
deep water with higher amounts of CO2 and a more acidic pH. Watch and listen to two oyster farmers from Taylor Shellfish Farms in Washington state talk how about ocean acidification is impacting their young oysters.
The Atlantic Meridional Overturning Circulation, also known as the Gulf Stream System,
brings warm
waters from the South to the North, where it sinks into the
deep and transports
cold water from the North to the South.
Other emerging threats include those from iron and urea fertilization; other geoengineering schemes, for example to include pumps to
bring colder and
deeper waters to the surface, noise which can disrupt marine mammal cycles and may also effect fish behavior disrupting vibration patterns in the
water column6.
On the other side, the oceanographer Wallace Broecker [Broecker, 1997] has argued that the present warm climate in Europe depends on a circulation of ocean
water, with the Gulf Stream flowing north on the surface and
bringing warmth to Europe, and with a counter-current of
cold water flowing south in the
deep ocean.
Re # 134 AK, as you point out,
cold deep water brought to the surface will sink unless it is distributed widely enough to mix with the surface
water and reach an equilibrium temperature that will keep it near the top.
Upwelling
cold deep water brings up the macro nutrients (nitrate and phosphate ions) and micronutrients (iron) that are abundantly dissolved in the
deep water.