So when physforum opened up I found my thread about 'global health' locked and, as I'm an avid follower of the environment, I still wanted to record what's happening.
And you're welcome to comment as long as you have relevant observations.
So whats new then.
Let's take a closer look at methane:)
This is Methane hydrates
"Originally thought to occur only in the outer regions of the Solar System where temperatures are low and water ice is common.
Significant deposits of methane clathrate have been found under sediments on the ocean floors of Earth. "
They have now also been found in shallow waters in the arctic.
"We had a hectic finishing of the sampling programme yesterday and this past night," said Dr Gustafsson from the Russian research ship Jacob Smirnitskyi.
"An extensive area of intense methane release was found. At earlier sites we had found elevated levels of dissolved methane. Yesterday, for the first time, we documented a field where the release was so intense that the methane did not have time to dissolve into the seawater but was rising as methane bubbles to the sea surface. These 'methane chimneys' were documented on echo sounder and with seismic [instruments]." At some locations, methane concentrations reached 100 times background levels. These anomalies have been seen in the East Siberian Sea and the Laptev Sea, covering several tens of thousands of square kilometers, amounting to millions of tons of methane, said Dr Gustafsson. "This may be of the same magnitude as presently estimated from the global ocean," he said. "Nobody knows how many more such areas exist on the extensive East Siberian continental shelves.""
From Methane time bomb
But they have been observed released in deep waters too. One off the coast of Norway, one off the coast of North Carolina, and probably elsewhere too. And remember that methane producing bacterias exist in the Perma frost on land too. As well as hydrates under the ground. Hydrates will be created by the combination of a low temperature (around 0 C) and pressure, depending on the pressure surrounding it it can remain stable at up to 18 C. So take away the pressure and it will rise but not as oil do. Remember that the 'permeability' of a gas is higher than that of water ('denser'). It will find 'ways' out everywhere.
" In fact, estimates are that more than 10% of the world’s hydrates are located on-shore in arctic permafrost; and a sizable — although not quantified — amount are in relatively shallow arctic seas. These are susceptible to melting from warming. And as we know, the polar regions are warming faster and will get hotter than the global average. So a sizable amount of the methane trapped in hydrates is vulnerable to release by warming."
Something similar is believed to have happened during the Permian-Triassic extinction event and the Paleocene-Eocene Thermal Maximum.
That happening ended " up to 96 percent of all marine species[3] and 70 percent of terrestrial vertebrate species becoming extinct; it is the only known mass extinction of insects. 57% of all families and 83% of all genera were killed off. The event had a profound effect on the terrestrial ecosystem, which is still being felt today, a quarter of a billion years later."
It all hinges together, what one can see looking at last year according to this article is that the artic ice is melting and not coming back. Also there are some sad observations about polar bears struggle for survival there. Another way of confirming those climate observations is to take a look at the overall weather. Read this piece of research from the National Center for Atmospheric Research (NCAR).Permafrost threatened by rapid retreat of arctic sea ice.
As well as "Following almost a decade with little change in global atmospheric methane mole fraction, we present measurements from the Advanced Global Atmospheric Gases Experiment (AGAGE) and the Australian Commonwealth Scientific and Industrial Research Organisation (CSIRO) networks that show renewed growth starting near the beginning of 2007.
Remarkably, a similar growth rate is found at all monitoring locations from this time until the latest measurements. We use these data, along with an inverse method applied to a simple model of atmospheric chemistry and transport, to investigate the possible drivers of the rise.
Specifically, the relative roles of an increase in emission rate or a decrease in concentration of the hydroxyl radical, the largest methane sink, are examined. We conclude that: 1) if the annual mean hydroxyl radical concentration did not change, a substantial increase in emissions was required simultaneously in both hemispheres between 2006 and 2007; 2) if a small drop in the hydroxyl radical concentration occurred, consistent with AGAGE methyl chloroform measurements, the emission increase is more strongly biased to the Northern Hemisphere."
From http://www.agu.org/pubs/crossref/2008/2008GL036037.shtml
Can we see any 'proofs' elsewhere in the arctic?
How about this? And this article states that there has been a major ice shelf loss for Canada
And finally " Earth's land surface was unusually warmer than normal last month (November) with some exceptions that pointed to a destabilizing stage of early imploding climate change.
The temperature pattern over land during November showed that Eurasia - the planet's biggest continent combining Asia with the smaller sub-continent of Europe - had a dramatic departure from normal temperatures. Across eastern European Russia, eastward through central Siberia and southward over the open plains of northern Kazakhstan, mean monthly temperature last month ranged from 5C - 10C degrees above normal.
The unusual high temperatures faded eastward and northward, although the warmth overall was still substantially warmer than usual with only relative few swaths of near normal temperatures. In much of China and India temperatures were from 1C to 3C degrees above normal.
The core of Europe also recorded substantially warmer than usual warmth that tapered westward over Russia to central Europe. However, there was a noticeable chill of 1C to 3C degrees below normal over the Iberian Peninsula to nearby northwest Africa.
Across the Americas the corridors of western Alaska experienced temperatures 2C to 4C degrees below normal. But the Alaskan Arctic - together with the southeast, most of Canada and the western half of the United States - were significantly warmer than usual and up to 4C degrees above normal.
The eastern and southeastern areas of the US experienced a warm start to the month but ended up slightly colder than usual. While in South America, big heat waves made for widespread warmth 2C to 4C degrees above normal in Argentina and in Brazil."
From http://www.dailyplanetmedia.com/