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The Methane Timebomb

The Methane Timebomb

Arctic scientists discover new global warming threat as melting permafrost releases millions of tons of a gas 20 times more damaging than carbon dioxide.

The Independent newspaper in the UK has been passed details of preliminary findings suggesting that massive deposits of sub-sea methane are bubbling to the surface as the Arctic region becomes warmer and its ice retreats.

Underground stores of methane are important because scientists believe their sudden release has in the past been responsible for rapid increases in global temperatures, dramatic changes to the climate, and even the mass extinction of species. Scientists aboard a research ship that has sailed the entire length of Russia's northern coast have discovered intense concentrations of methane – sometimes at up to 100 times background levels – over several areas covering thousands of square miles of the Siberian continental shelf.

In the past few days, the researchers have seen areas of sea foaming with gas bubbling up through "methane chimneys" rising from the sea floor. They believe that the sub-sea layer of permafrost, which has acted like a "lid" to prevent the gas from escaping, has melted away to allow methane to rise from underground deposits formed before the last ice age.

They have warned that this is likely to be linked with the rapid warming that the region has experienced in recent years.

Methane is about 20 times more powerful as a greenhouse gas than carbon dioxide and many scientists fear that its release could accelerate global warming in a giant positive feedback where more atmospheric methane causes higher temperatures, leading to further permafrost melting and the release of yet more methane.

The amount of methane stored beneath the Arctic is calculated to be greater than the total amount of carbon locked up in global coal reserves so there is intense interest in the stability of these deposits as the region warms at a faster rate than other places on earth.

Orjan Gustafsson of Stockholm University in Sweden, one of the leaders of the expedition, described the scale of the methane emissions in an email exchange sent from the Russian research ship Jacob Smirnitskyi.

"We had a hectic finishing of the sampling programme yesterday and this past night," said Dr Gustafsson. "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 kilometres, 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.

"The conventional thought has been that the permafrost 'lid' on the sub-sea sediments on the Siberian shelf should cap and hold the massive reservoirs of shallow methane deposits in place. The growing evidence for release of methane in this inaccessible region may suggest that the permafrost lid is starting to get perforated and thus leak methane... The permafrost now has small holes. We have found elevated levels of methane above the water surface and even more in the water just below. It is obvious that the source is the seabed."

The preliminary findings of the International Siberian Shelf Study 2008, being prepared for publication by the American Geophysical Union, are being overseen by Igor Semiletov of the Far-Eastern branch of the Russian Academy of Sciences. Since 1994, he has led about 10 expeditions in the Laptev Sea but during the 1990s he did not detect any elevated levels of methane. However, since 2003 he reported a rising number of methane "hotspots", which have now been confirmed using more sensitive instruments on board the Jacob Smirnitskyi.

Dr Semiletov has suggested several possible reasons why methane is now being released from the Arctic, including the rising volume of relatively warmer water being discharged from Siberia's rivers due to the melting of the permafrost on the land.

The Arctic region as a whole has seen a 4C rise in average temperatures over recent decades and a dramatic decline in the area of the Arctic Ocean covered by summer sea ice. Many scientists fear that the loss of sea ice could accelerate the warming trend because open ocean soaks up more heat from the sun than the reflective surface of an ice-covered sea.

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Shministim. A new word, not a very new concept.

We, high-school graduate teens, declare that we shall work against the Israeli occupation and oppression policy in the occupied territories and the territories of Israel. Therefore we will refuse to take part of these actions, which are being done under our name as part of the IDF.

Our refusal comes first and foremost as a protest on the separation, control, oppression and killing policy held by the state of Israel in the occupied territories, as we understand that this oppression, killing and routing of hatred will never lead us to peace, and they are all contradictory to the basic values a society that pretends to be democratic should have.

All the members of this group believe in developing the value of social work. We are not refusing to serve the society we live in, but are protesting against the occupation and the ways of actions which the militaristic system holds as it is today- crushing civil rights, discriminating on a racial base and acting opposing international laws.

We oppose the actions taken in the name of the "defense" of the Israeli society (Checkpoints, targeted killing, apartheid roads-available for Jews only, curfews etc.) that serve the occupation and exploitation policy , annex more conquered territories to the State of Israel and tramples the rights of the Palestinian population in an aggressive manner. These actions serve as a band-aid covering a bleeding wound, and as a limited and temporary solution that will accelerate and aggravate the conflict further.

We expostulate the plundering and the theft of territories and source of income to the Palestinians in exchange to the expansion of the settlements, reasoning to defend Israeli territories. In addition, we oppose any transformation of Palestinian cities and villages to ghettos without minimal living conditions or income sources enclosed by the separation wall.

We also protest the humiliating and disrespectful behavior of the military forces towards Palestinians in the West Bank; violence towards demonstrators, public humiliations, arrests, destruction of property regardless to any safety or defense needs, all of which violate global human rights and international law.

The wall and blockades surround the Palestinian Territories and serve as a halter around the Palestinian's neck. The soldiers who commit crimes under the patronage and protection of their commanders reflect the image of the Israeli society; a destructive and surprising society that is incapable of accepting its neighboring nation as a partner and not as an enemy.

In order to hold an effective dialogue between the two societies, we, the well-established and stronger society, have the responsibility of establishing and strengthening the other. Only with a more socially and financially established partner could we work towards peace rather than one-sided retaliation acts. Rather than supporting those citizens who have hope for peace, the military cast sanctions and pushes more and more people towards acts of extreme violence and escalation.

We hereby challenge every citizen who wonders if the military's policy in the occupied territories is conducive to the progression of the peace process, to discover by himself/ herself the truth and to lift the veil which distorts the reality of the situation; to verify statistical data; to look for the humane side in him/her and in the society which stands in front of him/her, to disprove the myths that were routed within us regarding the necessity of the IDF's in the Palestinian Occupied Territories, and to stand up against every action which he finds irrational and illegal.

In a place were there are humans, there is someone to talk to. Therefore, we ask to create a dialogue that goes beyond the power struggle, the retaliation and one-sided attrition actions; to disprove the "No Partner" myth, which is leading to a lose-lose situation of an ongoing frustration, and to move to more humane methods.

We cannot hurt in the name of defense or imprison in the name of freedom; therefore we cannot be moral and serve the occupation.

Signed
Members of the Shministim Letter 2008.