Ronald Engels schreef op 7 augustus 2021 04:51:
[quote alias=nine_inch_nerd id=13605349 date=202108062337]
Als we het zo ver laten komen, is het einde nabij.
www.theguardian.com/environment/2021/...Citaat:
Klimaatcrisis: wetenschappers zien waarschuwingssignalen van instorting van de Golfstroom
Een stopzetting van de Atlantische stromingen zou verwoestende wereldwijde gevolgen hebben en mag niet gebeuren, zeggen onderzoekers
Toen Wubbo daarvoor 20 jaar geleden waarschuwde lachte velen hem uit. Men zei dat gebeurt niet in 100 jaar
Climate crisis: Scientists spot warning signs of Gulf Stream collapse[i]A shutdown would have devastating global impacts and must not be allowed to happen, researchers say
Damian Carrington
Climate scientists have detected warning signs of the collapse of the Gulf Stream, one of the planet’s main potential tipping points.
The research found “an almost complete loss of stability over the last century” of the currents that researchers call the Atlantic meridional overturning circulation (AMOC). The currents are already at their slowest point in at least 1,600 years, but the new analysis shows they may be nearing a shutdown.
Such an event would have catastrophic consequences around the world, severely disrupting the rains that billions of people depend on for food in India, South America and West Africa; increasing storms and lowering temperatures in Europe; and pushing up the sea level off eastern North America. It would also further endanger the Amazon rainforest and Antarctic ice sheets.
The complexity of the AMOC system and uncertainty over levels of future global heating make it impossible to forecast the date of any collapse for now. It could be within a decade or two, or several centuries away. But the colossal impact it would have means it must never be allowed to happen, the scientists said.
It is not known what level of CO2 would trigger an AMOC collapse, he said. “So the only thing to do is keep emissions as low as possible. The likelihood of this extremely high-impact event happening increases with every gram of CO2 that we put into the atmosphere”.
Scientists are increasingly concerned about tipping points – large, fast and irreversible changes to the climate. Boers and his colleagues reported in May that a significant part of the Greenland ice sheet is on the brink, threatening a big rise in global sea level. Others have shown recently that the Amazon rainforest is now emitting more CO2 than it absorbs, and that the 2020 Siberian heatwave led to worrying releases of methane.
The AMOC is driven by dense, salty seawater sinking into the Arctic ocean, but the melting of freshwater from Greenland’s ice sheet is slowing the process down earlier than climate models suggested.
The analysis concluded: “This decline [of the AMOC in recent decades] may be associated with an almost complete loss of stability over the course of the last century, and the AMOC could be close to a critical transition to its weak circulation mode.”
David Thornalley, at University College London in the UK, whose work showed the AMOC is at its weakest point in 1,600 years, said: “These signs of decreasing stability are concerning. But we still don’t know if a collapse will occur, or how close we might be to it.”
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Klimaatvrienden,
- Dit is een onzin kletsverhaal, zoals gebruikelijk van de Guardian, de CO2 Global Warming/Klimaat Veranderingsgelovigen, zonder enige echte kennis van het onderwerp, slechts journalistieke eigenbelang bezigheidstherapie van de Guardian!