Is abrupt climate change happening?

[scas]

Hello,

I was reading a presentation by Dr. Shakhova to the U.S. DOE in
December 2010 and on page 34 of her presentation is states that:

"Bad news: directly observed fluxes exceed estimated by up 3 orders of
magnitude.

Interpretation of acoustical data recorded with deployed multibeam
sonar allowed moderate quantification of bottom fluxes as high as 44 g/
m2/d (Leifer et al., in preparation). Prorating these numbers to the
areas of hot spots (210×103 km2) adds 3.5Gt to annual methane release
from the ESAS. This is enough to trigger abrupt climate change
(Archer, 2005)."

http://symposium.serdp-estcp.org/Technical-Sessions/1A

I've read in Curt Stager's book that both he and David Archer think
sub-sea permafrost methane release is a long term (centuries) process.
However I see John Nissen and others like James Lovelock say
catastrophe is imminent.

I've read Alvia's summary of a 4 GtC released as methane scenario,
however it doesn't elucidate time scales.

Can anyone confirm the accuracy of the report and what will be the
result? I see James Hansen saying our pollution is already blocking 1
or 2 watts per square meter; will SRM become necessary now?

For reference, i'm 25, quit my job as a pilot to go to university and
join the army. I follow climate/energy/environment closely and can't
help but think our behavior is causing war and collapse.