You are in Guest mode. If you want to post, you'll need to register (we promise it's painless).
Registered users should log in now. (Forgot your password?)

Guest-accessible forum This forum allows unregistered guests access to read. You must register to post in this forum.

Nature_and_Environment.7

Topic HomeTopicsForum HomeForumsHomeSearchSettingsHelpExit

Global Climate Change

--------

{Nature_and_Environment.7.545}: Jay Hoffman {resist} Sun, 19 Jan 2020 00:40:58 CST (41 lines)

The Rumbling Methane Enigma
by Robert Hunziker

The East Siberian Arctic Shelf (ESAS) alone is the size of Germany,
France, Great Britain, Italy, and Japan combined and jammed full of
methane trapped beneath underwater permafrost that is rapidly
thinning.

According to Dr. Semiletov: “Emissions of methane from the East
Siberian Shelf – which is the widest and most shallow shelf of the
World Ocean – exceed the average estimate emissions of all the world’s
ocean. This is due to the fact that the reserves of methane under the
submarine permafrost exceed the methane content in the atmosphere is
many thousands of times.”

With ESAS getting more and more active as of recent, it is important
to evaluate the risks of further breakout. For example, Wadhams says
that Natalia Shakova, the leading expert on ESAS, believes it contains
up to 700 GT of CH4. The risk is rapid release, a big burp of 8% of
the deposit or 50GT, which, in turn, would crank up worldwide
temperatures by 0.6°C over two years. This would have an extremely
negative impact on the overall global climate system with unknown but
likely horrific results as temps crank up to, or beyond, the IPCC
danger zone of 2°C much sooner than anybody expects. Wadhams believes
this is society’s biggest climate threat because at 2°C above pre-
industrial crop yields start going down, very rapidly. An ESAS big
burp would do the job.

The probability of this pulse happening is high, at least 50 percent
according to the analysis of sediment composition by those best placed
to know what is going on, Natalia Shakhova and Igor Semiletov.
Moreover, if it happens, the detrimental effects are gigantic… the
risk of an Arctic seabed methane pulse is one of the greatest
immediate risks facing the human race… Why then are we doing nothing
about it? Why is this risks ignored by climate scientists, and
scarcely mentioned in the latest IPCC assessment? It seems to be not
just climate change deniers who wish to conceal the Arctic methane
threat, but also many Arctic scientists, including so-called ‘methane
experts.” (Wadhams, pg. 127-28)

"https://www.counterpunch.org/2020/01/17/the-rumbling-methane-enigma/"

--------

Forum
Topic HomeTopicsForum HomeForumsHomeSearchSettingsHelpExit
Guest-accessible forum This forum allows unregistered guests access to read. You must register to post in this forum.

You are in Guest mode. If you want to post, you'll need to register (we promise it's painless).
Registered users should log in now. (Forgot your password?)

The New Café  Home | Your Hotlist and Directory | Independent Partner Forums |
FAQ | User Guidelines | Privacy Policy