They predicted that the ice age had
slowed ocean circulation, trapping CO2 deep within it, and that warmer temperatures reversed this process.
Not exact matches
During what are called Heinrich events — natural but still largely unexplained fluctuations in the global climate — the Atlantic
Ocean's
circulation slows substantially.
Climate change is playing a major role in the
slowing down of the
circulation of the Atlantic
Ocean.
It leads to sea level rise of several meters, changes in
ocean circulation,
slow - down of AMOC etc..
(«On decadal to century timescales, climate dynamics — the complex interplay of multiple external forcings (rapid and
slow), the spectrum of atmospheric and
ocean circulation oscillations, interactions with biosphere — determines variations in climate.»)
The much
slower thermohaline
circulation mixes cold abyssal water on a time scale of centuries — the global
ocean turnover time estimated from bottom current velocities is estimated to be on the order of half a millennium
The issue is what is happening now — solar is not changing, Milankovitch and plate tectonics are too
slow,
ocean circulation appears relatively stable etc. etc. and all the fingerprints that we can detect point to greenhouse gases (strat cooling etc.).
CO2 is taken up in higher latitudes, mostly in the Southern
Ocean, but while the uptake rate is a non-linear function of the chemistry, ocean biology and circulation, it isn't going to «saturate» any time soon (though it may slow over the next few deca
Ocean, but while the uptake rate is a non-linear function of the chemistry,
ocean biology and circulation, it isn't going to «saturate» any time soon (though it may slow over the next few deca
ocean biology and
circulation, it isn't going to «saturate» any time soon (though it may
slow over the next few decades).
The Atlantic
Ocean circulation that carries warmth into the Northern Hemisphere's high latitudes is
slowing down because of climate change - and is at its weakest point in the past 1,600 years.
This could
slow down — or even shut down — the
ocean circulation system that brings heat from the tropics to the high latitudes.
In the northern hemisphere the
oceans circulate clockwise and there is a component of this
circulation that aligns with the counterclockwise rotation of the earth as viewed from above the north pole, a sort of negative angular momentum, so I would think that if the
ocean currents
slow down the earth's rotation would speed up.
Not only is it the largest
ocean, it also contains the «oldest water» — that is the water that (due to a giant
slow loop in the thermohaline
circulation) spends the longest time without contact with the atmosphere, with the best chance of accumulating CO2 (as carbonate) at the bottom.
So in sum, if Mann and Rahmstorf are right, a
slowing of Atlantic
Ocean circulation could be beginning, and even leaving a temperature signature for all to see.
Some of the warm water would be subducted by Atlantic Meridional Overturning
Circulation / Thermohaline
Circulation, some would be carried by
ocean currents into the Arctic Ocean where it would melt sea ice, and the remainder would be spun southward by the North Atlantic gyre toward the tropics so it could be warmed more by the effects of the slower - than - normal trade w
ocean currents into the Arctic
Ocean where it would melt sea ice, and the remainder would be spun southward by the North Atlantic gyre toward the tropics so it could be warmed more by the effects of the slower - than - normal trade w
Ocean where it would melt sea ice, and the remainder would be spun southward by the North Atlantic gyre toward the tropics so it could be warmed more by the effects of the
slower - than - normal trade winds.
The Washington Post has this dramatic headline: Global warming is now
slowing down the
circulation of the
ocean with potentially dire consequences.
Recent research at Reading University and elsewhere indicates a
slowing of a deep
ocean circulation system in the North Atlantic, known as the Atlantic Meridional Overturning
circulation.
Of course the
slow changing Milankovitch forcing can also emerge from the short - term noise over several millennia (or faster when
ocean circulation or glacial - melt tipping points are reached).
During major iceberg discharges in the North Atlantic, known as Heinrich events, the
ocean overturning
circulation slowed to being almost still, the new evidence suggests.
Thus, when the
ocean circulations increase the resistor efficiency of the
oceans by
slowing the release of energy into the air then the air follows by increasing it's own resistor efficiency by exposing less equatorial air to space.
For me, that means I'd like to see it broken down, which Coby has done well so far, by (these are just examples i'd like to see): Factors and evidence supporting or effectively debunking a)
ocean acidity, which in itself has produced a number of alarming effects including less saline density in turn causing a
slowing of thermohaline
circulation (such as the gulf stream) b) photosynthesis - carbon sinks vs. sources or any direction that you'd like to take using what science knows CO2 to have an effect on.
Slow variations in upper
ocean heat content that have been observed in the subpolar and marginal ice zone regions of the Atlantic since the mid-twentieth century are thought to be related to changes in the strength of the Atlantic Meridional Overturning
Circulation (AMOC).
Maps that include the eerie tell - tale of an early
Ocean Circulation slow - down in the North Atlantic.
This great rush of freshwater melt and ice is already causing an
ocean - threatening
slow - down of Atlantic
circulation.
I will not trust any climate model until and unless it can accurately represent the PDO and other
slow features of the world
ocean circulation.
Basically what I am saying is that the notion of «inefficient» or «
slow»
circulation of heat (or other tracers) by the
ocean is probably not true.
Adding heat to the
ocean, in contrast,
slows down the overturning
circulation because
ocean currents depend on temperature gradients — moving from warmer locations to cooler locations — that weaken under global warming as cooler waters heat up.
As the Atlantic Meridional Overturning
Circulation (AMOC)
slows down, the
ocean absorbs less of both atmospheric gases and heat, though its ability to absorb heat is more greatly reduced.
ocean is of the order of 1000 years, thermal expansion is expected to be relatively
slow and predictable, although shifts in
ocean circulation can influence the details of the warming and sea - level rise.
On decadal to century timescales, climate dynamics — the complex interplay of multiple external forcings (rapid and
slow), the spectrum of atmospheric and
ocean circulation oscillations, interactions with biosphere — determines variations in climate.
And if the «extra heat» is being stored in the
oceans, why is it that if you do a little research into thermohalene
ocean circulation they talk about it
slowing down because of global warming, not speeding up?
One question posed by climate change is «will melting land ice and sea ice in the Arctic
slow down or even shut down a vital part of the
ocean circulation in the North Atlantic?»
Gyre - Basin - scale
ocean horizontal
circulation pattern with
slow flow circulating around the
ocean basin, closed by a strong and narrow (100 - 200 km wide) boundary current on the western side.
An input of freshwater makes the
ocean less salty and less dense, reducing the amount of deep water produced and
slowing down the
ocean circulation.
Based on current model simulations, it is very likely that the meridional overturning
circulation (MOC) of the Atlantic
Ocean will
slow down during the 21st century.
For the ice sheets the answer is probably no (but experts on the subject might have a better idea), but for the overturning
circulation or the ecosystem changes, the answer is probably yes — i.e. a
slower rate of warming could lead to a different response (allowing time for
ocean mixing to mitigate the effects, or adaptation of species to the new conditions).
The input of melted ice into the
ocean slows (or shuts down) the thermohaline
circulation (or Meridional Overturning Circulation), which further freshens the North
circulation (or Meridional Overturning
Circulation), which further freshens the North
Circulation), which further freshens the North Atlantic 5.
Computer models have shown the
slowing and speeding up of the subpolar gyre can influence the entire
ocean circulation system.»