Read here and here. Alarmists love to speak of catastrophic climate "tipping points" that the climate models predict. A favored "tipping point" are the models' prediction that an increase in methane gas released into the atmosphere (due to AGW-warming) will cause an acceleration of climate warming. That's the alarmist theory.
What's the data say though? Turns out the Gulf of Mexico oil spill provided real world empirical evidence that totally refutes the hysterical claims and model predictions for a methane "tipping point."
"“Based on our measurements from earlier in the summer and previous other measurements of methane respiration rates around the world, it appeared that (Deepwater Horizon) methane would be present in the Gulf for years to come. Instead, the methane respiration rates increased to levels higher than have ever been recorded, ultimately consuming it and prohibiting its release to the atmosphere.“"...."What the Deepwater Horizon incident has taught us is that releases of methane with similar characteristics will not have the capacity to influence climate.""
Additional greenhouse-gas postings. Other climate-model postings.
