The planets of the TRAPPIST - 1 system could be complex worlds with volcanoes, atmospheres and
warm subsurface oceans.
Highly cited Holland et al 2008 (Acceleration of Jakobshavn Isbræ triggered by
warm subsurface ocean waters) uses 20 year grided dataset of subsurf ocean T from commercial fishing industry.
But again, I have to ask a question that you have not answered: How does the heat trapped by CO2 at the surface skin
warm the subsurface ocean waters since it is widely acknowledged that the infrared heat from CO2 can't penetrate into the ocean itself?
Not exact matches
Scientists say Charon could have been
warm enough to cause the water ice to melt deep down, creating a
subsurface ocean.
Roth asks, «Do the vents extend down to a
subsurface ocean or are the ejecta simply from
warmed ice caused by friction stresses near the surface?»
The moon's south pole has strange,
warm fractures, and plumes of liquid water from a
subsurface ocean many believed was impossible in such a small, cold world.
«The main result supports and extends earlier work, showing that human forcing contributes to changing winds that contribute to
subsurface ocean warming, affecting some grounding zones of the ice sheet,» Alley said.
The search for this
subsurface ocean warmed up after scientists discovered plumes of mineral - rich water vapor squirting out of cracks near the south pole.
Closer investigation of these plumes, originating from geysers blasting from polar fissures in Enceladus» icy crust, revealed this water was coming from a
warm subsurface salty
ocean and the water was laced with hydrocarbons and ammonia, or «many of the ingredients that life would need if it were to start in an environment like that,» Soderblom tells HowStuffWorks.
Heat can change
ocean dynamics and eventually will increase glacial melting, which is mainly responding to
subsurface water rather than air
warming.
... a pronounced strengthening in Pacific trade winds over the past two decades — unprecedented in observations / reanalysis data and not captured by climate models — is sufficient to account for the cooling of the tropical Pacific and a substantial slowdown in surface
warming through increased
subsurface ocean heat uptake.
In contrast to the surface
warming trend of the Indian
Ocean, Alory et al. (2007) found a
subsurface cooling trend of the main thermocline over the Indonesian Throughflow region, that is, near EEIO, in 1960 — 99, the interval using the new Indian
Ocean Thermal Archive.
Abstract:... Here we show that a pronounced strengthening in Pacific trade winds over the past two decades — unprecedented in observations / reanalysis data and not captured by climate models — is sufficient to account for the cooling of the tropical Pacific and a substantial slowdown in surface
warming through increased
subsurface ocean heat uptake.
Yan, X-H., H. Su, and W. Zhang, 2014: Contribution of global
subsurface and deeper
ocean warming to recent global surface
warming hiatus.
«No one has noticed this discrepancy before - that the
subsurface oceans surrounding Greenland and Antarctica
warm very differently,» Yin said.
While many sources of stress have caused corals to bleach, «mass» coral bleaching (at scales of 100 km or more) has only occurred when anomalously
warm ocean temperatures, typically coupled with high
subsurface light levels, exceeded corals» physiological tolerances.
It is further shown that the
warm phase of the AMO corresponds to a strengthening of the Atlantic meridional overturning circulation (AMOC) and a weakening of the Atlantic subtropical cell (STC), which both induce an anomalous northward current in the TNA
subsurface ocean.
«The authors write that «the El Niño - Southern Oscillation (ENSO) is a naturally occurring fluctuation,» whereby «on a timescale of two to seven years, the eastern equatorial Pacific climate varies between anomalously cold (La Niña) and
warm (El Niño) conditions,» and that «these swings in temperature are accompanied by changes in the structure of the
subsurface ocean, variability in the strength of the equatorial easterly trade winds, shifts in the position of atmospheric convection, and global teleconnection patterns associated with these changes that lead to variations in rainfall and weather patterns in many parts of the world,» which end up affecting «ecosystems, agriculture, freshwater supplies, hurricanes and other severe weather events worldwide.»»
Because the mean meridional temperature gradient of the
subsurface ocean is positive because of the temperature dome around 9 ° N, the advection by the anomalous northward current cools the TNA
subsurface ocean during the
warm phase of the AMO.
The feedbacks, including
subsurface ocean warming, help explain paleoclimate data and point to a dominant Southern Ocean role in controlling atmospheric CO2, which in turn exercised tight control on global temperature and sea l
ocean warming, help explain paleoclimate data and point to a dominant Southern
Ocean role in controlling atmospheric CO2, which in turn exercised tight control on global temperature and sea l
Ocean role in controlling atmospheric CO2, which in turn exercised tight control on global temperature and sea level.
report that
ocean sediment cores containing an «undisturbed history of the past» have been analyzed for variations in PP over timescales that include the Little Ice Age... they determined that during the LIA the
ocean off Peru had «low PP, diatoms and fish,» but that «at the end of the LIA, this condition changed abruptly to the low
subsurface oxygen, eutrophic upwelling ecosystem that today produces more fish than any region of the world's
oceans... write that «in coastal environments, PP, diatoms and fish and their associated predators are predicted to decrease and the microbial food web to increase under global
warming scenarios,» citing Ito et al..
Meltwater tends to stabilize the
ocean column, inducing amplifying feedbacks that increase
subsurface ocean warming and ice shelf melting.
The upper 3 meters of the world's
oceans hold more heat than the entire atmosphere, so continual ventilation of just 10 meters of
warmer subsurface water will affect the global average for decades.
Subsurface ocean warming explains why global average air temperatures have flatlined since 1999, despite greenhouse gases trapping more solar heat at the Earth's surface.
The strong
warming of the
subsurface ocean is a testament to this.
Warming of surface
ocean waters is well known, but how the
subsurface waters are changing is less clear.
Based on a conceptual oceanographic model, the researchers propose a mechanism for the
subsurface warming of the glacial Arctic
Ocean: A reduced influx of freshwater to the Arctic
Ocean acted to deepen the halocline and push the
warm Atlantic Layer downward.
The new study published as a Letter in Nature Geoscience shows that the
warm intermediate Atlantic Layer was displaced far downward in the glacial Arctic
Ocean, resulting in a substantial
warming at depths between 1000 and 2500 m. Based on a conceptual oceanographic model, the researchers propose a mechanism for the
subsurface warming of the glacial Arctic
Ocean: A reduced influx of freshwater to the Arctic
Ocean acted to deepen the halocline and push the
warm Atlantic Layer downward.
The study found that the Pacific
Ocean is the main source of the
subsurface warm water but some of these waters have already been pushed to the Indian
Ocean.
Paleoclimate data reveal that
subsurface ocean warming causes ice shelf melt and ice sheet discharge.
During La Nina heat is buried in the
subsurface ocean, whereas during El Nino the surface layer is anomalously
warm.
«If the southern
ocean forcing (
subsurface warming) of the Antarctic ice sheets continues to grow, it likely will become impossible to avoid sea level rise of several meters, with the largest uncertainty being how rapidly it will occur,» the report states.
Reduced equatorial cloud cover during La Nina (due to the cooler sea surface temperature), combined with the strong upwelling (Ekman suction) in the eastern equatorial Pacific, does indeed lead to greater
warming of the
ocean - because it's bringing cool
subsurface water to the surface, where it can be heated by the sun.
... then why do the vertical mean temperature anomalies (NODC 0 - 2000 meter data) of the Pacific
Ocean as a whole and of the North Atlantic fail to show any
warming over the past decade, a period when ARGO floats have measured
subsurface temperatures, providing reasonably complete coverage of the global
oceans?
Thus, the static stability of the near - surface water increases and the convective mixing of cold surface water with the relatively
warm subsurface water is reduced, thereby contributing to the reduction of sea surface temperature in the Circumpolar
Ocean.