Methane and Climate Change

Wow that is a giant crator. http://www.dailymail.co.uk/sciencetech/article-3703458/The-Arctic-leaking-methane-200-times-faster-usual-Bizarre-gas-bubbles-create-trembling-tundras-speeding-global-warming.html

Did it ever happen in the past? A climate alarmist I knew was not too worried about CH4. http://www.astrobio.net/also-in-news/can-melting-frozen-methane-explain-rapid-climate-change-56-million-years-ago/

During the Paleocene-Eocene Thermal Maximum (PETM), temperatures in the deep ocean rose by about five degrees Celsius and sea surface temperatures increased by up to nine degrees Celsius. This hot period lasted for about 100,000 years and caused the extinction of many species. – See more at: http://www.astrobio.net/also-in-news/can-melting-frozen-methane-explain-rapid-climate-change-56-million-years-ago/#sthash.z6mAp6hw.dpuf

Using computer models of the warming process, the researchers simulated the effects of PETM ocean warming on sediments that may have contained methane hydrate and tracked how methane transport mechanisms would have affected its release into seawater.

Professor Tim Minshull, from Ocean and Earth Science at the University of Southampton and lead author of the study, said: “Our results show that hydrate melting can indeed be triggered by ocean temperature change, but the result is not necessarily a rapid outburst of methane.

“This is because the methane gas formed by hydrate melting below the sea floor takes time to travel up to the seabed, and on the way it can refreeze or dissolve and then be consumed by microbes that live below the seabed. Only a fraction of the methane may escape into the ocean and the part that does escape may take thousands of years to do so.”

– See more at: http://www.astrobio.net/also-in-news/can-melting-frozen-methane-explain-rapid-climate-change-56-million-years-ago/#sthash.z6mAp6hw.dpuf

 Is methane a powerful greenhouse gas? Probably not…Looking at the second graph in the figure, methane (CH4) has narrow absorption bands at 3.3 microns and 7.5 microns (the red lines). CH4 is 20 times more effective an absorber than CO2 – in those bands. However, CH4 is only 0.00017% (1.7 parts per million) of the atmosphere. Moreover, both of its bands occur at wavelengths where H2O is already absorbing substantially. Hence, any radiation that CH4 might absorb has already been absorbed by H2O. The ratio of the percentages of water to methane is such that the effects of CH4 are completely masked by H2O. The amount of CH4 must increase 100-fold to make it comparable to H2O.https://wattsupwiththat.com/2014/04/11/methane-the-irrelevant-greenhouse-gas/

In general the atmosphere has no effect on climate. The oceans and orbit and sun are the only things with enough power..


The graph on methane is wrong. Methanes absorption wavelengths change an the molecule changes state and energy. Its about 80 times more of a green house gas than CO2. Yes H2O does absorb in the same band but not quite. This occurs mainly towards the equator as the farther north you go the less overall total moisture is in the air. When you get to the arctic the moisture content is similar to a desert so methane is a larger percentage and does not condense out of the atmosphere like H2O. Methane is slightly heavier so it stays near the surface and acts on a local level, smog component. The sun, orbit, wobble, tilt, and ocean cycles are very powerful and based on what I was taught by climate experts growing up is we are heading for an ice age quickly. The trick is there is always a major warming spike just before the crash into an ice age. The climate models don’t even come close to matching the history of climate so trusting them to predict the future is foolish. The climate will change and we need to quite bickering over things we don’t understand and develop adaptation procedures or suffer massive strife.

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