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Antarctica may conjure up an image of a pristine white landscape, but researchers say climate change is turning the continent green.
Scientists studying banks of moss in Antarctica have found that the quantity of moss, and the rate of plant growth, has shot up in the past 50 years, suggesting the continent may have a verdant future.
“Antarctica is not going to become entirely green, but it will become more green than it currently is,” said Matt Amesbury, co-author of the research from the University of Exeter.
“This is linking into other processes that are happening on the Antarctic Peninsula at the moment, particularly things like glacier retreat which are freeing up new areas of ice-free land – and the mosses particularly are very effective colonisers of those new areas,” he added.
In the second half of the 20th century, the Antarctic Peninsula experienced rapid temperature increases, warming by about half a degree per decade.
Writing in the journal Current Biology, scientists from three British universities and the British Antarctic Survey describe how they gathered data from five vertical columns of sediments, or cores, drilled from three islands just off the Antarctic Peninsula – the northernmost part of Antarctica that reaches out towards south America.
The team then analysed the cores, examining the top 20cm of each to allow the scientists to look back over 150 years and explore changes over time across a number of factors. These included the amount of moss, its rate of growth, the size of populations of microbes and a ratio of different forms, or isotopes, of carbon in the plants that indicates how favourable conditions were for photosynthesis at a particular point in time.
The cores reveal that the warming climate of Antarctica in the past 50 years has spurred on biological activity: the rate of moss growth is now four to five times higher than it was pre-1950.
It should be noted that the current CO2 level in the atmosphere hasn't been seen on this planet since the Pliocene era some 3 million years ago, before humans existed. People need to wake up. We are DEFINITELY breaking the planet's natural cycles and the results are starting to show.
The cores reveal that the warming climate of Antarctica in the past 50 years has spurred on biological activity: the rate of moss growth is now four to five times higher than it was pre-1950.
The cores reveal that the warming climate of Antarctica in the past 50 years has spurred on biological activity: the rate of moss growth is now four to five times higher than it was pre-1950.
originally posted by: Krazysh0t
a reply to: HeliocentricFantasy
Follow this slowly. Climate change isn't a zero sum game. Natural AND man-made forces work together or opposed to each other to affect the overall climate. So JUST because humans weren't involved in the past doesn't mean they can't effect the climate now.
It should be noted that the current CO2 level in the atmosphere hasn't been seen on this planet since the Pliocene era some 3 million years ago, before humans existed. People need to wake up. We are DEFINITELY breaking the planet's natural cycles and the results are starting to show.
originally posted by: HeliocentricFantasy
a reply to: Krazysh0t
It should be noted that the current CO2 level in the atmosphere hasn't been seen on this planet since the Pliocene era some 3 million years ago, before humans existed. People need to wake up. We are DEFINITELY breaking the planet's natural cycles and the results are starting to show.
Definitely huh? So who caused the rise in CO2 levels in the Pliocene era? Who caused the natural cycles you speak of in the first place?
originally posted by: HeliocentricFantasy
a reply to: Krazysh0t
The cores reveal that the warming climate of Antarctica in the past 50 years has spurred on biological activity: the rate of moss growth is now four to five times higher than it was pre-1950.
Is this based on pre 1950's studies on Antarctic moss growth rate?
Did this warm up start in the 50's? Because of human caused release of CO2? In the 50's?