nasty Extinction : the trouble from methane & GHG]

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nasty Extinction : the trouble from methane & GHG]

[I also posted this in Environment/Anthropocene]

This occurs to me every time Mr. Thom mentions the looming Methane [or methane-ethane] and to my knowledge he never puts teeth in it. So [besides epic flooding, land loss, mass migration, invasive species, etc] why would global warming be bad?

wikipedia : "Anoxic Event" :
https://en.wikipedia.org/wiki/Purple_sulfur_bacteria
https://en.wikipedia.org/wiki/Sulfate-reducing_bacteria https://en.wikipedia.org/wiki/Anoxic_event
also PETM [Paleocene-Eocene Thermal Maximum cited by Mr. Thom]

[Wignall, Paul B.; Richard J. Twitchett (24 May 1996). "Oceanic Anoxia and the End Permian Mass Extinction". Science. 5265 272 (5265): 1155–1158. Bibcode:1996Sci...272.1155W. doi:10.1126/science.272.5265.1155. PMID 8662450.]

These links give a caution that the End-Permian injury is repeated now in the Anthropocene at maybe 20,000 times the speed [200 years of Industrial Revolution to 2,000,000 years of Siberian volcanic outgassing].
Oceanic acidification [from pH 8.2 downward] and CO2 saturation might well kill today's corals and then generally today's species [oceanic and terrestrial].
[Bacteria and some Archaea, usually photosynthetic and anaerobic, thrive in these man-made conditions and can again change the huge ocean production from oxygen to poison gas.
Off West Africa this has occurred recently from overfishing [sardines if I recall] and the resulting overgrowth then die-off of algae at the ocean floor. Local extinction of fish meant a murderous increase in bushmeat killing [including chimpanzees -- people want protein!].

In few : we are voracious and ignorant. We strive to force the ocean to switch from producing dioxygen [O2] from phytoplankton to producing hydrogen sulfide [H2S] which would kill us and most any living thing.

Will Kennedy
Joined:
Feb. 6, 2014 4:14 pm

Here's what Republicans and billionaires really mean when they talk about 'freedom'

Thom plus logo America is having a heated debate about the meaning of the word socialism. We'd be better served if, instead, we were debating the meaning of freedom.