Study warns of looming potential for runaway global warming
BY MAX GREENWOOD - 08/06/18 07:56 PM EDT

A new study out Monday warns of the possibility of out-of-control global warming if humans fail to band together to fight the worst effects of climate change.

The analysis, conducted by researchers at the Australian National University and the Stockholm Resilience Center, among other institutions, outlines the potential for a "threshold" that, if crossed, would lead to runaway warming patterns and the advent of a "Hothouse Earth."

If such a threshold is crossed, the study warns, global average temperatures could climb as much as 8 degrees Fahrenheit above current temperatures and sea levels could rise 30 to 200 feet.

"Crossing the threshold would lead to a much higher global average temperature than any interglacial in the past 1.2 million years and to sea levels significantly higher than at any time in the Holocene," the study says.

The report is based on a review of past research of thresholds for climate change, according to USA Today.

Even if every country that signed on to the Paris climate agreement meets its obligations under the pact and limits the global temperature increase to 3.6 degrees Fahrenheit, runaway global warming could still be a threat, the newspaper reports. ...

I think we should put you on suicide watch.

Who cares??? Global warming. Overpopulation....
We cook.....we cook.
The only way to fix it.....kill all humans. Feel free to kick things off.

Who cares??? Global warming. Overpopulation....
We cook.....we cook.
The only way to fix it.....kill all humans. Feel free to kick things off.

There is a huge risk of positive feedback causing further temperature rises.

It's already happening with the melting of subarctic peat and warmer seas causing release of methane from hydrates in the sea.

Bobby will be apoplectic when he sees this claim.

Between global warming and plastic pollution of the sea, the earth is doomed.

The current Northern Hemisphere heat waves are a portent of what is to come.

http://thehill.com/policy/energy-environment/400647-study-warns-of-looming-poten...

Quote:

This warming is anthropogenic and the rate of warming is too fast for plants and animals to adapt. They can migrate/colonise areas of higher altitudes or latitudes but that can only go so far.

With the permafrost thawing and both poles melting and sea level rise accelerating it is beyond dispute that the globe is warming.

Only questions are how to reduce emissions, how to remove CO2 from the atmosphere, how to adapt and how to mitigate.

Jovial Monk wrote on Aug 7^th, 2018 at 4:48pm:



Hi Monk,
Have you been listening to your snake oil salesman - Al Gore?

There is a huge risk of positive feedback causing further temperature rises.

It's already happening with the melting of subarctic peat and warmer seas causing release of methane from hydrates in the sea.

Bobby will be apoplectic when he sees this claim.

Between global warming and plastic pollution of the sea, the earth is doomed.

The current Northern Hemisphere heat waves are a portent of what is to come.

http://thehill.com/policy/energy-environment/400647-study-warns-of-looming-poten...

Quote:

Bobby. wrote on Aug 7^th, 2018 at 7:10pm:

I have never listened, watched or read anything by Al Gore. The one sucked in by snake oil sellers is you.

You KNOW you are bullshitting, right?

You KNOW you are bullshitting, right?

Dnarever wrote on Aug 7^th, 2018 at 7:23pm:


ok Go back further. Tell me when, if ever, we have had runaway global warming.  We have had millions of years of orbital changes.

If we ever had runaway global warming all water would have been driven off. There would be none now.

Grendel wrote on Aug 7^th, 2018 at 3:45pm:

CO2 is the basic control knob for global climate.

We see the heat content of the oceans zooming up.

That means more warm water reaching the poles and that means more ice gets melted exposing dark rock and ice—positive feedback.

The high numbers of huge wildfires—another positive feedback.

We get oil from under the ocean.

Captain Caveman wrote on Aug 7^th, 2018 at 3:02pm:

Lol, so extremism is the only answer to extremism is it?

You're a lunatic buddy 

We see the heat content of then ocean zooming. Of course ice is going to be melted. Then we get the positive feedback.

Warm waters are already melting Antarctic ice so as the ocean heat content increases we will see more and more ice melted. Same as in the Arctic, especially the Pacific side.

lee loves to play semantic games

from his own link

Quote:
the heat-amplifying effect of water vapor is potent enough to double the climate warming caused by increased levels of carbon dioxide in the atmosphere.


bit of an own goal by lee

Which makes a lot of sense because water vapor can't increase temperatures by itself. It falls out as rain.

A MAJOR component can be 10%. Not the same as ONLY component.

Anyway, world is warming and there are plenty of positive feedbacks at work and more to come. What, if anything we can do about it is the question.

A MAJOR component can be 10%. Not the same as ONLY component.

A major component can be 10%.

The subject is—how do we prevent runaway global warming?

Captain Caveman wrote on Aug 7^th, 2018 at 9:23pm:

The more we delay taking action the bigger the cost in lives and dollars will be to finally take the real action.

Renewable energy has parts to play and I am not against the use of nuclear energy.

salad in wrote on Aug 7^th, 2018 at 1:25pm:

Some observed and potential effects of global warming are positive feedbacks, which contribute directly to further global warming. The Intergovernmental Panel on Climate Change's (IPCC) Fourth Assessment Report states that "Anthropogenic warming could lead to some effects that are abrupt or irreversible, depending upon the rate and magnitude of the climate change."[6]

Carbon cycle feedbacks

There have been predictions, and some evidence, that global warming might cause loss of carbon from terrestrial ecosystems, leading to an increase of atmospheric CO2 levels. Several climate models indicate that global warming through the 21st century could be accelerated by the response of the terrestrial carbon cycle to such warming.[7] All 11 models in the C4MIP study found that a larger fraction of anthropogenic CO2 will stay airborne if climate change is accounted for. By the end of the twenty-first century, this additional CO2 varied between 20 and 200 ppm for the two extreme models, the majority of the models lying between 50 and 100 ppm. The higher CO2 levels led to an additional climate warming ranging between 0.1° and 1.5 °C. However, there was still a large uncertainty on the magnitude of these sensitivities. Eight models attributed most of the changes to the land, while three attributed it to the ocean.[8] The strongest feedbacks in these cases are due to increased respiration of carbon from soils throughout the high latitude boreal forests of the Northern Hemisphere. One model in particular (HadCM3) indicates a secondary carbon cycle feedback due to the loss of much of the Amazon Rainforest in response to significantly reduced precipitation over tropical South America.[9] While models disagree on the strength of any terrestrial carbon cycle feedback, they each suggest any such feedback would accelerate global warming.

Observations show that soils in the U.K have been losing carbon at the rate of four million tonnes a year for the past 25 years[10] according to a paper in Nature by Bellamy et al. in September 2005, who note that these results are unlikely to be explained by land use changes. Results such as this rely on a dense sampling network and thus are not available on a global scale. Extrapolating to all of the United Kingdom, they estimate annual losses of 13 million tons per year. This is as much as the annual reductions in carbon dioxide emissions achieved by the UK under the Kyoto Treaty (12.7 million tons of carbon per year).[11]

It has also been suggested (by Chris Freeman) that the release of dissolved organic carbon (DOC) from peat bogs into water courses (from which it would in turn enter the atmosphere) constitutes a positive feedback for global warming. The carbon currently stored in peatlands (390–455 gigatonnes, one-third of the total land-based carbon store) is over half the amount of carbon already in the atmosphere.[12] DOC levels in water courses are observably rising; Freeman's hypothesis is that, not elevated temperatures, but elevated levels of atmospheric CO2 are responsible, through stimulation of primary productivity.[13][14]

Tree deaths are believed to be increasing as a result of climate change, which is a positive feedback effect.[15]

Arctic methane release

Warming is also the triggering variable for the release of carbon (potentially as methane) in the arctic.[16] Methane released from thawing permafrost such as the frozen peat bogs in Siberia, and from methane clathrate on the sea floor, creates a positive feedback.[17][18]

Methane release from melting permafrost peat bogs

Wikinews has related news: Scientists warn thawing Siberia may trigger global meltdown
Western Siberia is the world's largest peat bog, a one million square kilometer region of permafrost peat bog that was formed 11,000 years ago at the end of the last ice age. The melting of its permafrost is likely to lead to the release, over decades, of large quantities of methane. As much as 70,000 million tonnes of methane, an extremely effective greenhouse gas, might be released over the next few decades, creating an additional source of greenhouse gas emissions.[19] Similar melting has been observed in eastern Siberia.[20] Lawrence et al. (2008) suggest that a rapid melting of Arctic sea ice may start a feedback loop that rapidly melts Arctic permafrost, triggering further warming. ...

Plimer talks nonsense and I doubt he wrote the book that bears his name. I read and post scientific papers.

Jovial Monk wrote on Aug 8^th, 2018 at 3:57pm:

If the globe was actually warming up there would be higher temps everywhere no record cold temps etc...

Maybe MBP you'd like to try again.  Or wait another 30 years and maybe just maybe your alarmism might be more realistic.

Study warns of looming potential for runaway global warming
BY MAX GREENWOOD - 08/06/18 07:56 PM EDT

A new study out Monday warns of the possibility of out-of-control global warming if humans fail to band together to fight the worst effects of climate change.

The analysis, conducted by researchers at the Australian National University and the Stockholm Resilience Center, among other institutions, outlines the potential for a "threshold" that, if crossed, would lead to runaway warming patterns and the advent of a "Hothouse Earth."

If such a threshold is crossed, the study warns, global average temperatures could climb as much as 8 degrees Fahrenheit above current temperatures and sea levels could rise 30 to 200 feet.

"Crossing the threshold would lead to a much higher global average temperature than any interglacial in the past 1.2 million years and to sea levels significantly higher than at any time in the Holocene," the study says.

The report is based on a review of past research of thresholds for climate change, according to USA Today.

Even if every country that signed on to the Paris climate agreement meets its obligations under the pact and limits the global temperature increase to 3.6 degrees Fahrenheit, runaway global warming could still be a threat, the newspaper reports. ...

The uneducated never do understand the uncertainty scientists use in their language—doesn’t mean they are not confident of their results and conclusions.

So you are uneducated too?

You prefer Nostradamus to scientific prediction?

I posted a graph of oceanic heat content.

There are tons of data about AGW, SST, land temperatures, Jet Stream weakening and melting of polar ice.

No data?

I posted ocean heat content.

There is a huge risk of positive feedback causing further temperature rises.

It's already happening with the melting of subarctic peat and warmer seas causing release of methane from hydrates in the sea.

Bobby will be apoplectic when he sees this claim.

Between global warming and plastic pollution of the sea, the earth is doomed.

The current Northern Hemisphere heat waves are a portent of what is to come.

http://thehill.com/policy/energy-environment/400647-study-warns-of-looming-poten...

Quote:

Grendel wrote on Aug 8^th, 2018 at 5:21pm:

No, we would see what we are seeing now: the temperature distribution moved slightly to the warm side but some (less but some) cold events happening. There are very few cold records broken but many hot records broken.

There are higher temperatures everywhere bar the East Antarctic Plateau.

Both poles losing net ice. Tundra thawing out.

Poor roach, like Lees scared of AGW.

Permafrost is thawing out. Tell me how this is not due to warming.

Permafrost thawing out everywhere IS a pretty good indicator the globe is warming.

So is ice melting at both poles.

So is the huge heatwave affecting most of the globe.

Extreme weather events as predicted by AGW theory is right on track !

You are a complete moreon and nobody takes any notice of your LNP denialist agenda. How to get a Uni degree in science without going to Uni ? Just signup with the LNP and all of a sudden you are a complete expert