The Earth spins a delicate web of life, where every part affects the whole, creating a symphony of interdependence. This wonderfully complex world thrives on such diverse interconnections, and yet, there can also be drawbacks to these linkages — especially in a warming world.
For instance, it becomes a cause for alarm when the ripples reach Earth’s climate tipping elements — large-scale components like the Amazon rainforests and Greenland ice sheets — which are characterised by a critical threshold beyond which the system reorganises, often abruptly and irreversibly.
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Now, new research has revealed that some of these large-scale tipping elements do not operate in isolation, but are surprisingly and worryingly characterised by long-distance ‘teleconnections’. Essentially, if one element tips over the threshold, another may well follow suit irrespective of the geographical distance between them.
The study pertains to two specific elements: the Amazon rainforest and the Tibetan Plateau, which sit on different sides of the globe. Despite being so far apart, evidence suggests that changes in the South American ecosystem can trigger changes in the vicinity of the Himalayas.
Connecting the dots from the past, peeking into the future
Scientists focussed on a grid of over 65,000 sub-regions, regarding them as global nodes, and examined the near-surface air temperature in those regions using data from the past 40 years.
Studying these nodes spread across the globe revealed how changes at one point triggered or influenced another. These permutations and combinations lit up a pronounced propagation pathway from the continent of South America leading to the Tibetan Plateau via the Southern African and Middle East regions.
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Atmospheric and ocean circulations that reign over the pathway stretching from the Amazon rainforest to the Tibetan plateau can precisely explain the unexpected linkages over this 20,000-km stretch.
After looking at the records from the past, the researchers set out to peer into the future. They used climate computer simulations to determine how global warming might influence the current linkages between Earth systems until 2100.
Standing on shaky ground with interlinked tipping elements
This study, for the very first time, identifies and quantifies robust inter-linkages or teleconnections between climate tipping elements.
By showing how extreme temperatures in the Amazonian rainforests are inextricably related to extremes faced in the Tibetan Plateau, this research confirms an alarming future for our planet!
“When it’s getting warmer in the Amazon, it also does so in Tibet. Hence for temperature, there’s a positive correlation. It’s different for precipitation. When we have more rain in the Amazon, there’s less snowfall in Tibet,” explains Jürgen Kurths, the paper’s co-author.
Amazonian rainforests are already under stress, thanks to all the logging, construction and warming. Furthermore, the Tibetan Plateau’s snow cover data indicate that it has been losing stability and looming closer to the tipping point for over 15 years.
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It may not appear shaky at the moment, but in all likelihood, it is. And once we cross the tipping threshold, there will be no emergency strings to pull.
“To be clear, it’s unlikely that the climate system as a whole will tip. Yet, over time, sub-continental tipping events can severely affect entire societies and threaten important parts of the biosphere. This is a risk we should rather avoid,” concludes Hans Joachim Schellnhuber, another co-author of the study.
To avoid this imminent threat, the drill should be pretty clear by now — reduce greenhouse emissions, prop up nature-based solutions that remove carbon dioxide from the atmosphere, and limit our planet’s warming.
This study was published in the journal Nature Climate Change and can be accessed here.
NOTE – This article was originally published in weather and can be viewed here
Tags: #climate, #climatechange, #climatecrisis, #earth, #environment, #getgreengetgrowing, #globalwarming, #gngagritech, #greenstories, #himalayas, #nature, #rainforests
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