Forests 'held their breath' during global warming hiatus, research shows

January 23, 2017, University of Exeter
Credit: Wikipedia.

Global forest ecosystems, widely considered to act as the lungs of the planet, 'held their breath' during the most recent occurrence of a warming hiatus, new research has shown.

The international study examined the full extent to which these vital ecosystems performed as a from 1998-2012 - the most recent recorded period of global warming slowdown.

The researchers, including Professor Pierre Friedlingstein from the University of Exeter, demonstrated that the global carbon sink—where is removed from the atmosphere and stored in the natural environment - was particularly robust during this 14 year period.

The study shows that, during extended period of slower warming, worldwide forests 'breathe in' carbon dioxide through photosynthesis, but reduced the rate at which they 'breathe out'—or release the gas back to the atmosphere.

The team believes the crucial study offers a significant breakthrough for future climate modelling, which is used to predict just how different ecosystems will respond to rising global temperatures.

The pioneering study is published in leading science journal, Nature Climate Change, on Monday, January 23 2017.

Professor Friedlingstein, Chair of the Mathematical Modelling of Climate Systems research group at the University of Exeter said: " Disentangling the feedback between global warming and the carbon cycle is critical for us to anticipate future . In this study, we analysed what happened during the recent period of reduced warming, the so-called hiatus, highlighting the importance of ecosystem respiration as a key control of land carbon sinks."

The Earth's vast ecosystems, such as forests and oceans, are known to counteract the adverse climate impacts of fossil fuel consumption by removing carbon dioxide from the atmosphere by acting as a carbon sink.

However, uncertainties remain about how these ecosystems will respond to future climate change, whether by consuming more carbon or, conversely, releasing greater volumes of carbon back into the atmosphere.

The study focused on Earth's natural carbon cycle responded during both periods of rapid, and less rapid, warming that would normally be expected.

It revealed that the total amount of carbon taken up by land ecosystems slowed during periods of rapid warming, and sped up during periods of slower warming.

More significantly, the team demonstrated that while rates of photosynthesis remained constant during the periods of slower warming, the forests released less carbon back into the atmosphere - meaning the Earth is storing much more carbon during these warming hiatuses.

"The global carbon sink has been surprisingly strong during the period from 1998 to 2012, and we now begin to understand the causal mechanisms", says Ashley Ballantyne of University of Montana, and lead author of the new research. Pekka Kauppi a forest ecologist from Helsinki University and co-author added the results were "As if forests have been holding their breath".

'Accelerating net terrestrial uptake during the hiatus due to reduced respiration' will be published online in Nature Climate Change on Monday, Jan. 23 2017.

Explore further: Research shows driving factors behind changes between local and global carbon cycles

More information: Accelerating net terrestrial carbon uptake during the warming hiatus due to reduced respiration, Nature Climate Change,

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Jan 23, 2017
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2.6 / 5 (5) Jan 23, 2017
Aw c'mon Snoose, you know The Science Is Settled, right?
5 / 5 (3) Jan 23, 2017
Make up your minds. Was there a hiatus or not. No wonder people don't believe what scientists say anymore.
1 / 5 (3) Jan 23, 2017
Here is another raving lunatic ignorate deporable idiot ;

5 / 5 (2) Jan 23, 2017
The study shows that, during extended period of slower warming, worldwide forests 'breathe in' carbon dioxide through photosynthesis, but reduced the rate at which they 'breathe out'—or release the gas back to the atmosphere.

All of the forests...meaning all the trees on earth, simultaneously altered how they function....for 14 years. This is the explanation to explain a "hiatus" that did or didn't happen depending on which mouth the "97%" are talking out of. What happened to "all of the extra heat is in the ocean" to explain how CO2 levels have continued to rise while temperature stagnated? Now the trees held their breath is the explanation...yet doesn't really play well with CO2 levels continuing to rise.

Kinda like how sea level rise is only happening where no one is around, but the satellites can measure what if human observations do not agree...they are based on faulty tide gauges that show the same sea level for the past several decades.
4 / 5 (4) Jan 23, 2017
The single critical indicator of "pseudoscience" is the resort to evidence that cannot be measured or seen. IOW, the "evidence" presented has to simply be "believed," since there is no way to detect or measure it.

The forests "held their breath" is exactly this. How do you measure that? And, as bschott points out, what a preposterous claim to make.

Now, let's ask this question: what if the forests, collectively, decide to "breath real hard"? Will this drive up global temperatures? I say that, in fact, the forests decided to "hold their breath" 150 years ago, and that's why global temperatures have been rising to our present day!

Do you see how silly this kind of reasoning becomes?
not rated yet Jan 23, 2017
And those plants better keep holding their breaths if they know what's good for them, otherwise they'll be taxed.
So less respiration equals gains in net primary production, right?
not rated yet Jan 23, 2017
And those plants better keep holding their breaths if they know what's good for them, otherwise they'll be taxed.

So your are saying that a country like Canada that has 8000 trees per human (massive net carbon sink) having a Prime Minister ratifying the UN carbon cap and trade policies, as well as implementing country wide carbon taxation shouldn't also be pushing ahead with new pipelines to bolster the oil infrastructure? I bet the tax dollars from the carbon tax actually fund some of these pipelines....but yeah...everyone is completely on the up and up here....

2.3 / 5 (6) Jan 23, 2017
the most recent recorded period of global warming slowdown

WTF, these guys did not get the memo.
Well, at least there isn't any slowdown in FAKE "science" from the AGW Cult.
4 / 5 (4) Jan 25, 2017
Monkeyyyy, playing with daddy's keyboard again.. naughty naughty monkey... What fake science ? the phantom science going on in your head ? and here i thought all you think about all day is bananas ?
Climate change is as real as the hot air inside your head everytime you thump a keyboard button.

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