The results of 2016 expedition of N. Shakhova and I. Semiletov group in East Siberian Sea were published in March 2017. From drilled samples they concluded that the subsea permafrost melts up to 15 to 20 cm pro year. They observed the methane emissions with the largest flows in range of more than 1 kg/m2 daily. They estimate that the entire surface with similar emissions occupies already 10 % of East Siberian Sea, that means from 50.000 to 200.000 km2.
If the hotspots include 10 % of the entire ESAS surface, 200.000 km2 and on this surface, at the estimated quantities 1 kg/m2, we calculate annually emissions, we get 70 Gton. This is today 14 times more in one year, as it is (it should be) the entire methane quantity in the atmosphere (5 Gton). At lower surface margin we get approx. 20 Gton.
And if we stay at before 5 years measured real 200 g/m2, this gives on the estimated hotspot surface 5 times smaller annual quantity of emission, 14 Gton. Already this is almost 3 times of the entire "current official" methane quantity in atmosphere (IPCC).
Take into account that methane is in short time, because its atmosphere concentrations are only rising, 150 times stronger as CO2, and that these today's emissions are already doubling the entire Earth's greenhouse effect. The only solution to save the life on this planet, is to prevent these emissions, to capture them, to use THIS METHANE instead all other fossil energy. How much time do we have ??