And note their Section 4 — contemplating what happens if
deep warm water currents change in a way that changes the current temperature in areas where methane hydrates are in equilibrium, suggesting the possibility of a rapid large scale release of methane gas.
Not exact matches
El Nino's mass of
warm water puts a lid on the normal
currents of cold,
deep water that typically rise to the surface along the equator and off the coast of Chile and Peru, said Stephanie Uz, ocean scientist at Goddard Space Flight Center in Greenbelt, Maryland.
Deeper water remained unusually
warm, especially in the northern part of the California
Current.
Arrays monitor circulating
currents in the Atlantic Ocean, in which
warm shallow
waters move north (red), while cold
deep waters move south (blue).
The wind changes were found to be heaving
warm currents from
deeper waters up into a zone where the Antarctic ice sheet is vulnerable to melt and crumble from beneath — the area where towers of ice sit atop submerged ground.
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.
Since
deeper waters will be
warmer, there is a possible link to the global ocean circulating
currents that results in
warmer water in polar regions.
Wetsuit, drysuit, backmount, sidemount, singles, doubles,
warm water, cold
water, slack,
current,
deep, caves, reef, wreck etc..
The surface
water is
warm and you dive
deeper to catch the cool
current.
A lot of reseach energy is being devoted to the study of Methane Clathrates — a huge source of greenhouse gases which could be released from the ocean if the thermocline (the buoyant stable layer of
warm water which overlies the near - freezing
deep ocean) dropped in depth considerably (due to GHG
warming), or especially if the
deep ocean
waters were
warmed by very, very extreme changes from the
current climate, such that
deep water temperatures no longer hovered within 4C of freezing, but
warmed to something like 18C.
The surface heat capacity C (j = 0) was set to the equivalent of a global layer of
water 50 m
deep (which would be a layer ~ 70 m thick over the oceans) plus 70 % of the atmosphere, the latent heat of vaporization corresponding to a 20 % increase in
water vapor per 3 K
warming (linearized for
current conditions), and a little land surface; expressed as W * yr per m ^ 2 * K (a convenient unit), I got about 7.093.
(In real life I understand that mixing is the main agent of
deeper warming in the ocean due to winds,
currents, etc.) Only the top skin of
water heats up and therefore lower
warming must be by diffusion, or are convection cells within the
water inevitable?
Conceptually, it's hard to see how the Gulf Stream western boundary
current could be weakened by conditions around Greenland; this is a fluid dynamics system, not a mechanical «belt»; a backup due to less
deep water formation should have little effect on the physics of the gyre and the formation of the western boundary
current, and it also seems the tropical
warming and the resulting equator - to - pole heat transport are the drivers — but perhaps modulation by jet stream meandering is playing some role in the cooling?
I recall mention that Katrina was unusual because while crossing the Gulf «Ring
Current» the
deeper water pulled up by the hurricane was almost as
warm as the sea surface, so the
deeper water fed almost as much heat energy into the storm as the surface.
Surface temperature is an imperfect gauge of whether the earth has been
warmed by an imbalance between incoming radiation from the sun, and outgoing radiation, because of the role of ocean
currents in the distribution of heat between
deeper and surface
waters.
Either a big chunk of ice has been melting extraordinarily fast — which would cool the surrounding air — or somehow ocean
currents would have changed in a way that favoured more rapid
warming of
deep water.
Most of the
deep ocean
warming is occurring in the subtropical ocean gyres - vast rotating masses of
water in each ocean basin where near - surface
currents converge and are forced downward into the ocean interior.
Warm Atlantic
waters that don't enter the Irminger
Current, continue
deeper into the Arctic, mostly via the Barents Sea.
Turbulent
deep ocean flows surface and set up wind and
current responses that again extend the cold tongue and piles
warm surface
water up against Australia and Indonesia.
The influx could slow down or shut off the North Atlantic
Deep Water (NADW) formation, the driving factor behind the conveyor belt current known as thermohaline circulation, which brings large amounts of warm water to the North Atlantic re
Water (NADW) formation, the driving factor behind the conveyor belt
current known as thermohaline circulation, which brings large amounts of
warm water to the North Atlantic re
water to the North Atlantic region.
During the
warm period, faster
currents cause more tropical
water to travel to the North Atlantic,
warming both the surface and the
deep water.
Two items: the first, the layered Ocean
currents, fresh
water on top, then the
warmer but saltier layer and finally the
deep bottom layer.
Atlantic Meridional Overturning Circulation A major
current in the Atlantic Ocean, characterized by a northward flow of
warm, salty
water in the upper layers of the Atlantic, and a southward flow of colder
water in the
deep Atlantic.
47
Warm, shallow current Cold, salty, deep current Fig. 20 - 12, p. 476 Figure 20.12 Natural capital: a connected loop of shallow and deep ocean currents stores CO2 in the deep sea and transports warm and cool water to various parts of the ea
Warm, shallow
current Cold, salty,
deep current Fig. 20 - 12, p. 476 Figure 20.12 Natural capital: a connected loop of shallow and
deep ocean
currents stores CO2 in the
deep sea and transports
warm and cool water to various parts of the ea
warm and cool
water to various parts of the earth.
8 global circulation of
deep ocean
currents transports
warm water to colder areas & cold
water to
warmer areas efficient heat - transport system drives Earth's climate
Current global climate models suggest that the
water vapor feedback to global
warming due to carbon dioxide increases is weak but these models do not fully resolve the tropopause or the cold point, nor do they completely represent the QBO [Quasi Biennial Oscillation],
deep convective transport and its linkages to SSTs, or the impact of aerosol heating on
water input to the stratosphere.
In the Atlantic Ocean, the
current known as the Atlantic Meridional Overturning Circulation (AMOC) ferries
warm surface
waters northward — where the heat is released into the atmosphere — and carries cold
water south in the
deeper ocean layers, according to the National Oceanic and Atmospheric Administration.
The ocean
waters of the
deep circumpolar
current that swirl around the continent have been getting measurably
warmer and nearer the ocean surface over the last 40 years, [continue reading...]
Due to both bottom - boundary layer friction and interior adjustment, this coastal
current anomaly facilitates the movement of
warmer deep water upward onto the continental shelf and toward the coast (see Figure).
Note the temporary decrease in magnitude of the cold wake in one area behind the storm, indicative of the passage of the storm over a region containing the
deep warm water of the Gulf of Mexico Loop
Current.
The effects of this marked shift in westerly winds are already being seen today, triggering
warm and salty
water to be drawn up from the
deep ocean, melting large sections of the Antarctic ice sheet with unknown consequences for future sea level rise while the ability of the Antarctic Circumpolar
Current to soak up heat and carbon from the atmosphere remains deeply uncertain.
During Katrina and Rita,
deep warm water in the Loop
Current and within a Loop
Current eddy was located under the storm tracks, which helped these storms to reach Category 5 intensity over the Gulf of Mexico.
«The top of the glacier is melting away as a result of decades of steadily increasing air temperatures, while its underside is compromised by
currents carrying
warmer ocean
water, and the glacier is now breaking away into bits and pieces and retreating into
deeper ground.»
Around 55 million years ago, an abrupt global
warming event triggered a highly corrosive
deep -
water current to flow through the North Atlantic Ocean.
To this extent, the majority opinion of global
warming is «
water sloshing in a very shallow pan» as the New York Times» Andrew Revkin likes to say — it bounces around, reflecting
current events, and generally isn't moored in
deep beliefs one way or the other.
«Obviously the hotter
water deep under the ice at the poles did not get any heat from the sun to be
warmer and does not all have tropical
water currents heating it, so where does the
deep water get its heat from to stop from freezing.»
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.