Essentially, a low temperature pressure cooker.
Originally posted by poet1b
Yep, and there has been a serious lack of information coming out of the Arctic about expeditions aimed at monitoring the rapidly expanding release of methane on the vast Arctic shelves.
But the surface rises, releasing the added pressure.
The deep ocean heats, the molecules become more excited, but the weight on top remains the same
The abyssal warming produces a 0.053 (±0.017) mm yr−1 increase in global average sea level and the deep warming south of the Subantarctic Front adds another 0.093 (±0.081) mm yr−1
FAR from being the benign figure of mythology, Mother Earth is short-tempered and volatile. So sensitive in fact, that even slight changes in weather and climate can rip the planet’s crust apart, unleashing the furious might of volcanic eruptions, earthquakes and landslides. That’s the conclusion of the researchers who got together last week in London at the conference on Climate Forcing of Geological and Geomorphological Hazards. It suggests climate change could tip the planet’s delicate balance and unleash a host of geological disasters. What’s more, even our attempts to stall global warming could trigger a catastrophic event (see “Bury the carbon”).
Evidence of a link between climate and the rumblings of the crust has been around for years, but only now is it becoming clear just how sensitive rock can be to the air, ice and water above. “You don’t need huge changes to trigger responses from the crust,” says Bill McGuire of University College London (UCL), who organised the meeting. “The changes can be tiny.” You don’t need huge changes to trigger a response from the crust. They can be tiny.
Among the various influences on the Earth’s crust, from changes in weather to fluctuations in ice cover, the oceans are emerging as a particularly fine controller. Simon Day of the University of Oxford, McGuire and Serge Guillas, also at UCL, have shown how subtle changes in sea level may affect the seismicity of the East Pacific Rise, one of the fastest-spreading plate boundaries. The researchers focused on the Easter microplate – the tectonic plate that lies beneath the ocean off the coast of Easter Island – because it is relatively isolated from other faults. This makes it easier to distinguish changes in the plate caused by climate systems from those triggered by regional rumbles.
CAPE TOWN - Metro emergency services paramedics on Wednesday said the body of a man was discovered on board an Asian vessel moored in Table Bay Harbour. The crewman's body was found in the engine room of the Shengfu Vessel just before noon. It is believed he may have inhaled a poisonous gas. Metro EMS' Keri Davids said no one else was on board at the time. “The paramedics declared him deceased on the scene. I believe they are still investigating the cause of death.” The incident comes just days after a fire on board a Korean vessel claimed the life of a Vietnamese man. The ship caught fire at the Table Bay Harbour. It is believed the vessel may have been purposefully torched.
Neighbours in Ballydehob reacted with shock and devastation this morning following the deaths of a local farmer and his young daughter in west Cork overnight. Gardaí have begun an investigation following the recovery of the bodies of a 50-year-old man and a three-year-old girl from the sea off West Cork in the early hours of this morning. The narrow bothareen leading to the family's isolated farmhouse overlooking the water remained cordoned off this morning. "We just can't imagine what was going on at the time, it's mind boggling. I can't put words to it," neighbour Leslie Swanton said.
The body of the girl was located along the shoreline shortly before 2am. The body of her father was discovered a short time later in the water nearby. The girl's mother was involved in the search and she was present at the scene when the child's body was recovered.
ORLANDO, Fla. (WOFL FOX 35 ORLANDO) - An American Airlines flight taking off from Orlando International Airport turned around and returned this morning after the pilot reported smelling a "strange odor" in the cockpit, an airport official said. Flight 1083 took off for Dallas at 6:44 a.m. with more than 200 passengers. Moments later, the pilot called in a "strange odor." The plane turned around and landed safely at 6:49 a.m., according to Greater Orlando Aviation Authority public affairs director Carolyn Fennell said. There was no impact on airport operations, and no one was hurt, Fennell said. Passengers are being placed on alternate flights. The Federal Aviation Administration will investigate the incident. Read more: www.myfoxorlando.com...
Witnesses told investigators that just before the truck reached the intersection, it left the roadway, jumped the curb and continued north through the park. The truck struck a sign and two trees, then crossed the intersection, striking another sign and a third tree. The final impact stopped the truck, which then caught fire. The driver, the lone occupant of the truck, died at the scene.
Sounds like the driver may have gotten a whiff of hydrogen sulfide and lost consciousness shortly before that intersection, then kept on going until something stopped the truck, which then caught fire and incinerated the driver, who may still have been alive at that point. This area is on Florida's Gulf Coast, downwind of the dead zones in the Gulf of Mexico, which are surely pluming hydrogen sulfide now...
Waves like this may result from subsurface landslides as methane hydrate deposits along coasts melt and collapse...
Ok. At 4,000 meters the pressure is 843,264 psf. So that increase in depth of 14.6mm in 100 years increases the pressure (according to you) by 0.0004%. That's over a period of 100 years.
Apply your calculations to a depth of 4,000 meters, which is the depth we are talking about.
It is a very small increase in the pressure, evenly distributed, over a long period of time.
That is a whole lot of force.
Yes. It affects other things too, salinity in particular, and is being closely watched. Have you found any data about the rate of loss of glacial ice and mass redistribution? Or just using your ass backwards approach?
Basically, the ice turns to water which is self-mobile and makes its way from land to sea, taking large amounts of mass off the land and putting it into the seas.
Here's that info from late 2010:
Originally posted by poet1b
reply to post by Vexatious Vex
Yepper, all that added pressure from the liquid ocean depths might have some effect.
One hypothesis, called the "Clathrate Gun" hypothesis, developed by James Kennett, professor of geological sciences at UCSB, proposes that past shifts from glacial to interglacial periods were caused by a massive decomposition of the marine methane hydrate deposits.
Methane hydrate is a form of water ice that contains a large amount of methane within its crystal structure, called a clathrate hydrate. According to Kennett's hypothesis, climatic destabilization would cause a sharp increase in atmospheric methane –– thereby initiating a feedback cycle of abrupt atmospheric warming. This process may threaten the current climate, according to the researchers. Warmer ocean temperatures from current global climate change is likely to release methane currently trapped in vast hydrate deposits on the continental shelves. However, consumption of methane by microbes in the deep sea prevents methane gas released from hydrates from reaching the ocean surface and affecting the atmosphere.
Bubbles provide a highly efficient mechanism for transporting methane and have been observed rising from many different hydrate deposits around the world. If these bubbles escape singly, most or all of their methane would dissolve into the deep-sea and never reach the atmosphere. If instead, they escape in a dense bubble plume, or in catastrophic blowout plumes, such as the one studied by UCSB researchers, then much of the methane could reach the atmosphere. Blowout seepage could explain how methane from hydrates could reach the atmosphere, abruptly triggering global warming.
Thus, these first-ever quantitative measurements of a seep blowout and the results from the numerical model demonstrate a mechanism by which methane released from hydrates can reach the atmosphere. Studies of seabed seep features suggest such events are common in the area of the Coal Oil Point seep field and very likely occur elsewhere.