But not too late for 4. Urgent action needed to prevent worst-case climate change scenarios and limit repercussions of abrupt runaway climate change..... OR, that's what I used to think, 5+ years ago; NOW I think it is indeed too late; we're f'd. Tipping points have tipped. Positive feedback effects in play. Bring on the methane. Abrupt climate change on the horizon. Exponential changes will escalate. Homo sapiens may not survive the current on-going 6th mass extinction.
Thus, Lovelock rejected his own Gaia hypothesis of a self-regulating planet and embraced the “flip” school of thought, which refers to dynamic systems or mathematics that describe things that tend to change suddenly, difficult to predict as to timing. Ergo, this refers to the fearsome tipping point, when the climate system suddenly turns wacky like a wild beast poked with a stick (Broecker), self-reinforcing its destructive path, hands-free, no stopping its ruinous behavior! This may already be happening on a scale that is downright scary in fact singularly scary because it’s so soon. This is not normal. The planet is on Speed!
Massive hurricanes (Harvey, Irma, Maria) and torrential flooding (Houston, Sierra Leone, Bihar-India, Assam-India, Nepal, Mumbai, Southern Asian Noah’s Ark territory) are only telltale signs, minor events in a bigger picture, like canaries in the proverbial mineshaft, warning of a much larger canvas painted with darkened hues, threatening like the distant rumbling of an upcoming mega storm.
In that regard, it’s unmitigated insanity to ignore the bellwethers of Armageddon when big time trouble brews, like now. Ominous changes in the planet’s ecosystem are so blatant that anybody ignoring these warning signals should be slapped on the back of the head: Wake up and pay attention!
After all, Greenland’s entire surface turned to slush for the first time in scientific history, raising the question of whether a tipping point is at hand, in turn, raising sea level by a lot. According to the climate models of the IPCC (Intergovernmental Panel on Climate Change), Greenland’s entire ice sheet was not expected to turn 100% slushy for decades to come. Surprise, surprise, it’s here now!
Another big surprise that hits right between the eyes is the colossal humongous loss of Arctic and Antarctic ice, astoundingly ahead of the scientific model indicators by decades upon decades. Precariously, according to knowledgeable scientists, West Antarctica is already at a tipping point. “That’s bad news” is the understatement of the century.
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... the East Siberian Arctic Shelf’s extraordinarily shallow waters (50m) have reached a thawing point for subsea permafrost, thereby exposing gigatons of ancient methane to too much heat, which, in turn, could evolve into nasty ole runaway global warming, in short, the worse of the worst case situation for all of humanity, as agricultural fields fry to a crisp.
Even worse yet, Russian scientists that annually travel to the Arctic have discovered increasingly wider extensive water columns of methane (CH4) bubbling up to surface. They believe there may be hundreds, maybe thousands, bubbling water columns up to one-kilometre (1,000 metres) diameter whereas those columns at the same exact locations only a few years ago were 100 metres in diameter but expanding fast! IPCC models for potential global warming do not include mention of this can of worms.
Speaking of risks of future global warming not included in IPCC models, scientists in Alaska discovered massive carbon emissions seeping out of land permafrost, essentially emitting as much carbon in two years as US commercial sources emit per annum. This has the signature of a tipping point that self-reinforces emission of carbon into the atmosphere. After all, Alaskan temps have been really hot. And, deadly methane-laden permafrost melts in heat.
Further, speaking of high heat levels found at high latitudes, Russian scientists report massive numbers (7,000 counted but likely thousands more) of pingos as well as melting permafrost spreading all across Siberia. Perniciously, this is likely more self-reinforcing carbon emission spewing into the atmosphere, no further human influence required.
As such and horrifyingly, the discombobulated ecosystem may be in the process, heaven forbid, of overtaking human influenced carbon emissions/global warming. No more anthropogenic or human influence required to overheat the planet; it may be starting to heat up on its own volition. That’s what Venus (865°F) did. All of its carbon is now in its atmosphere whereas most of our carbon is still underground, under ice.
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... nobody knows for certain what will happen, in part, because we’ve never been here before. All the same, abrupt climate change continues to negatively outpace expectations of scientists, leading to serious concerns that their worse case scenarios are too soft, too conservative.
shamelessly insincere climate politics will be a mainstay of establishment Democratic politics for decades to come
... is the practical lack of faith demonstrated by precisely those experts who best understand the political constraints on implementing meaningful sustainability.
Companies are trying to 'have their oil and drink it' by committing to 2°C in public while planning for much higher temperature rises, says shareholder campaign group, ShareAction.
So much of the Earth’s forest has been destroyed that the tropics now emit more carbon than they capture, scientists have found.
Tropical forests previously acted as a vital carbon “sink”, taking carbon from the atmosphere and turning it into oxygen, but the trend has reversed: they now emit almost twice as much carbon as they consume.
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