Either this is a truism (the sun must be heating the ocean surface first) or it is meant to take into account the complex circulations that occur in the ocean, like the Gulf Stream's involvement in a vertical rise of waters
from deep ocean layers in one region and sinking of the cooled surface waters as the stream reaches its northern limit.
If the energy was rising
from the deeper ocean layers then they would be * cooling * but OHC in the deep ocean is also increasing.
Not exact matches
The rising temperatures cause
layers of
ocean water to stratify so the more oxygen - rich surface waters are less able to mix with oxygen - poor waters
from the
deeper ocean.
The smoke,
from fires
deep in Africa, is nearly invisible to satellites in space, and because the southeast Atlantic
Ocean has few islands, the
layers are hard to study
from below.
They compared isotope measurements on the silica skeletons of diatoms, which store environmental signals
from the
ocean's surface, with isotope signals
from radiolarians, which live in
deeper water
layers.
«In that area, like on the eastern boundaries of other tropical
oceans, nutrient - rich waters
from deeper water
layers are transported to the surface,» explains co-author Prof. Dr. Hermann Bange, also
from GEOMAR.
Research cruises such as Tara
Oceans and the Global
Ocean Sampling Expedition have begun to sample, sequence and analyze the ocean microbiome, from the sunlit surface waters that are mixed by the wind to dark deep layers that relatively unpertu
Ocean Sampling Expedition have begun to sample, sequence and analyze the
ocean microbiome, from the sunlit surface waters that are mixed by the wind to dark deep layers that relatively unpertu
ocean microbiome,
from the sunlit surface waters that are mixed by the wind to dark
deep layers that relatively unperturbed.
Donnelly's team examined cores of sediment sampled
from two of the salt pond's
deepest points, searching for
layers that were deposited when storms violently washed
ocean sand into the 65 - acre waterway.
In the
oceans, warmer weather is driving stronger winds that are exposing
deeper layers of water, which are already saturated with carbon and not as able to absorb as much
from the atmosphere.
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.
In colder
oceans, the separating
layer (thermocline) does not form, or only for parts of the year, so phytoplankton at the top receives nutrients
from the
deeper sea and provides oxygen for the the upper and
deeper layers (as well as nutrients, when phytoplankton decomposes).
This suggestion of an accelerated warming in a
deep layer of the
ocean has been suggested mostly on the basis of results
from reanalyses of different types (that is, numerical simulations of the
ocean and atmosphere that are forced to fit observations in some manner).
Scientists also think that the circulation of heat
from the top
layers of the
ocean, which have been most affected to date, to the
deeper oceans below may be another factor behind the «hiatus» in global warming.
«The pycnocline (meaning rapid change of density) separates the surface
layer of the
ocean from the
deep ocean.
Water
from the faucet represents heat entering the shallow
ocean layer, water exiting the drain represents heat leaving the shallow
oceans and entering the
deep oceans, and the water level in the bathtub represents the heat in the shallow
ocean layer.
Gradually, the anomaly spreads
from the mixed -
layer to the
deeper layers of the
ocean, thereby increasing the effective heat capacity of the
oceans.
Another contributor is changes in
ocean circulation which cause less heat is transported upwards
from the
deeper, warmer
layer.
As discussed in the following section, the absence of significant warming in the Circumpolar
Ocean of the Southern hemisphere is attributable mainly to the large thermal inertia of the ocean, which results from very effective mixing between the surface layer and the deeper layers of ocean in this re
Ocean of the Southern hemisphere is attributable mainly to the large thermal inertia of the
ocean, which results from very effective mixing between the surface layer and the deeper layers of ocean in this re
ocean, which results
from very effective mixing between the surface
layer and the
deeper layers of
ocean in this re
ocean in this region.
With the temperature of the
deep oceans explained, all the sun is doing is warm the surface
layer from ~ 275K to ~ 290K.
To enjoy getting into those claims you would have to consider the impacts of differing rates of advection in the different
ocean and atmospheric
layers from the stratopause to the
deep oceans.
upwelling wind blows, moves water away, causes new water to rise up to replace it brings up tiny
ocean organisms, minerals, and other nutrients
from the
deeper layers of the water.
brings up tiny
ocean organisms, minerals, and other nutrients
from the
deeper layers of the water.
As there is no differentiation in type for the inflows and outflows, also 22 % of the red CO2 is exchanged by natural, colourless CO2,
from the
deep oceans (we forget for a moment that some of it returns in another season
from the
ocean surface
layer and vegetation decay).
When the
ocean surface is cooler, warmth is taken
from the surface into
deeper ocean layers that «do not emit heat out of the planet».
rw (05:22:03): «The motions of the massive
oceans where heat is moved between
deep layers and the surface provides variability on time scales
from years to centuries.
So we have a surface
layer (100 - 200m) warmed
from above,
deep oceans being their cold selves, and in between the thermocline, the transition
from warm surface to cold
deep ocean, warmed by conduction
from the surface
layer above.
I haven't seen any process that can transport large amounts of heat
from the surface
layer to the
DEEP ocean.
Even though there are temperature
layers in the
ocean, which we used to hide
from sonar, the
deeper we went, the colder the water got.
So the temperature of the
deep oceans (presently ~ 275K) is set by heat
from inside the earth before the sun starts warming the surface
layer.
The motions of the massive
oceans where heat is moved between
deep layers and the surface provides variability on time scales
from years to centuries.
However, I have repeatedly pointed out that the opposite is also possible because the
deep ocean waters now returning to
ocean surface could be altering the pH of the
ocean surface
layer with resulting release of CO2
from the
ocean surface
layer.
This fresh water, together with melt ‐ water
from the melting ice pack in summer forms a permanent superficial
layer (usually about 200m
deep) of low salinity over the entire Arctic
Ocean, without which much less seasonal ice would form.
Right: global
ocean heat - content (HC) decadal trends (1023 Joules per decade) for the upper
ocean (surface to 300 meters) and two
deeper ocean layers (300 to 750 meters and 750 meters to the
ocean floor), with error bars defined as + / - one standard error x1.86 to be consistent with a 5 % significance level
from a one - sided Student t - test.
On an earlier thread I made a back - of - envelope calculation that, for the
deep ocean to «suck» all the heat down
from the surface, so that the sea surface
layer and troposphere were nowhere more than 3C, the mean temperature of the
deep ocean would need to increase only 0.4 C. Maybe someone could check this.
Nor can one be confident that the contribution of subsea volcanic variability to
deep -
ocean temperature change is negligible in comparison with that
from the atmosphere, particularly when the relative densities of the two media and the distance of the benthic
layers from the atmosphere are taken into account.
The existence of that cooler
layer is evidence that the rate of evaporation is the primary influence on variability in the rate of
ocean energy loss (apart
from internal
ocean circulation variability which is not relevant here) and it follows that more evaporation for the same rate of conduction and radiation (
from a stable temperature differential) will send that cooler
layer deeper and / or intensify the temperature differential between it and the
ocean bulk below.
Of course, if the air were to be warmer than the
ocean surface then evaporation would take the extra energy required
from the air rather than the water and that 1 mm
deep layer (0.3 C cooler than the
ocean bulk) would rise to the surface and dissipate but that doesn't happen often or for long.
Since the skin
layer usually needs to tap into solar energy deposited
deeper in the
ocean to make up its deficit, the skin
layer will obviously make use of any extra DLR
from an enhanced greenhouse effect.
About half of the pCO2 decrease may be due to increased glacial
ocean stratification, trapping carbon - rich waters in the
deep layers away
from the atmosphere (22, 23).
Here is a figure estimating heat content changes for the decade
from the 1990 ′ s to the 2000 ′ s showing that the
deepest layers of the
oceans have also warmed.
It can not do so because the 1 mm
deep layer above the
ocean bulk and 0.3 C cooler than the
ocean bulk below (the subskin) effectively insulates the skin
layer from the
ocean bulk.
Right: global
ocean heat - content (HC) decadal trends (1023 J per decade) for the upper
ocean (surface to 300 m) and two
deeper ocean layers (300 — 750m and 750 m — bottom), with error bars defined as + / - one standard error x1.86 to be consistent with a 5 % significance level
from a one - sided Student t - test.
The inertial chimney: The near - inertial energy drainage
from the
ocean surface to the
deep layer.
On the other side, more UV
from the sun has its main effect in the stratosphere, changing the jet stream position, and downward further penetrating / warming the
oceans to
deeper layers.
Aside
from Von Schuckmann & Le Traon (2011), Levitus (2012), Nuccitelli (2012) and Balmaseda (2013), downwards propagation of heat to
deeper layers of the
ocean have been noted whilst investigating other aspects of climate system.
But let's address the question anyway - do we expect to have seen some obvious indication of heat being transferred
from the shallow to
deep ocean layers?