‘Runaway greenhouse’ may be easier to trigger than previously thought, study finds

[ScienceRocks]

‘Runaway greenhouse’ may be easier to trigger than previously thought, study finds



Scientists estimate that in the inner edge of “habitable zone” of a star, the runaway greenhouse stage begins.

According to a study published July 28 in Nature Geoscience, astronomers at the University of Washington and the University of Victoria say that it may be easier than previously thought for a planet to overheat during the so-called “runaway greenhouse” stage (See the study here: “Low simulated radiation limit for runaway greenhouse climates”).

During the runaway greenhouse stage, a planet absorbs more solar radiation than it can bounce back to outer space, which causes the planet to lose equilibrium and overheat. When this occurs, the oceans and other large bodies of water evaporate and saturate the atmosphere with steam. This leaves the planet uninhabitable – akin to the conditions scientists have observed on Venus.

Scientists estimate that in the inner edge of “habitable zone” of a star, the runaway greenhouse stage begins. When scientists reevaluated this classic planetary science scenario with novel computer modeling, they discovered that the runaway greenhouse stage had a lower thermal radiation threshold than previously believed.

Read more: ?Runaway greenhouse? may be easier to trigger than previously thought, study finds | Science Recorder

 

[Abraham3]

Let's hope it doesn't happen here. Let's make choices that will help.

 

[flacaltenn]

Imagine that -- the Earth could die 1.5Bill yrs from now and not because of man-made CO2...

Not sure what to make of this.. It's establishing criterion for cataloging "livable planets" in astronomical terms.. Not a treatise on climate science.

If the trigger could be pulled by a mere couple degC change of conditions --- we shouldn't waste any time even LOOKING for habitable planets..

 

[Abraham3]

Why shouldn't we bother keeping this one livable?

Costs too much?

 

[flacaltenn]

Why shouldn't we bother keeping this one livable?

Costs too much?

That's not the concern of this article.. In fact it states that AGW is unlikely to be sufficient enough to end life as we as know it..

It comes down to priorities. We have 50 yr old 55gal drums of concentrated radioactive waste leaking at least 3 US Nuclear Weapons sites..

We need to implement a minimal impact recycling plan for all those GTons of batteries your "green" toys are gonna generate.

The whole AGW circus has sucked the air out of environmental "livability".. I'd like to see us focus on REAL environmental quality planning.. Like wiser use of Fed lands, etc.. More incentives for private set-asides, etc.. Removing thousands of sq miles of floating GARBAGE from the oceans..

 

[Wroberson]

Sounds like they picked up another year of funding.

[ame="https://www.youtube.com/watch?v=ZQsK9WzDiuM"]https://www.youtube.com/watch?v=ZQsK9WzDiuM[/ame]

 

[ScienceRocks]

Sounds like they picked up another year of funding.

https://www.youtube.com/watch?v=ZQsK9WzDiuM

Shit like this is why the republican party will never win another election again. Only the rats would see the light on black on black genocide and become more moderate. If so the republicans would be flushed down the fucking crapper!

Anti-science bastards!

 

[waltky]

Granny says, "Dat's right - purt soon won't be no air to breathe den we all gonna die...

WMO: Greenhouse Gas Emissions Highest in 800,000 Years
October 30, 2017 — The World Meteorological Organization (WMO) reports greenhouse gas emissions in Earth's atmosphere have reached the highest level ever in 800,000 years. The figure was made public at the launch in Geneva of the WMO’s annual Greenhouse Gas Bulletin.

The report was released in advance of next week’s U.N. climate change negotiations in Bonn, Germany. It is meant as a wake-up call to nations that time is running out to take the necessary actions to curb global warning. The WMO reports CO2 concentrations in the atmosphere surged at record-breaking speed last year to historic highs. The WMO says CO2 levels are now 145 percent higher than pre-industrial levels. It warns this has the potential to change the climate systems in unprecedented and disastrous ways. WMO Secretary-General Petteri Taalas says this is already occurring. He told VOA scientists have been able to track the variability of carbon dioxide concentrations thousands of years back.

A coal-fired plant is seen emitting carbon dioxide, in Juliette, Georgia​

“We have far exceeded this natural variability that took place in the past and we are giving extra energy for our planet. We have already started seeing a growing amount of natural disasters related to weather. And, for example, the economic losses related to these disasters, they have tripled since the 80s. So, that is a consequence of climate change,” Taalas said. The report finds CO2 contributes more than 60 percent to the heating of the planet and that human activity and natural climate variability are behind the substantial increase in greenhouse gas concentrations.

Taalas warned temperature increases will reach dangerous levels by the end of the century without rapid cuts in CO2 and other greenhouse gas emissions. He said measures to mitigate climate change must be urgently taken. Taalas said work on developing renewable energy systems and transportation systems, including electric and hybrid cars, must be accelerated. He added these low carbon technologies can play an important role in reducing greenhouse gas emissions and lowering the Earth’s heat for future generations.

WMO: Greenhouse Gas Emissions Highest in 800,000 Years

See also:

UN Environment Report Urges Revived Effort to Cut Emissions
October 31, 2017 — The U.N.'s environment program said Tuesday countries and industries need to do more to meet targets to trim emissions of greenhouse gases that experts say are contributing to global warming.

In its latest "Emissions Gap" report issued ahead of an important climate conference in Germany next week, the program takes aim at coal-fired electricity plants being built in developing economies and says investment in renewable energies will pay for itself — and even make money – over the long term. Tuesday's report comes as U.N. officials are making a renewed push to maintain momentum generated by the Paris climate accord of 2015.

It aims to cap global temperature increases to 2 degrees Celsius (Fahrenheit) by the year 2100 compared to average world temperatures at the start of the industrial era. "The Paris agreement boosted climate action, but momentum is clearly faltering," said Edgar Gutierrez-Espeleta, Costa Rica's environment minister who heads the 2017 UN Environment Assembly. "We face a stark choice: up our ambition, or suffer the consequences." A new round of U.N. climate talks known as COP 23 starts in Bonn, Germany, on Monday, when countries will take stock of their achievements and prepare more ambitious national goals.

Cattle graze in a pasture against a backdrop of wind turbines near Vesper, Kan.​

In a summary of the report, UNEP says that current trends suggest that even if current national commitments are met, a temperature increase of 3-degrees Celsius by the end of the century is "very likely — meaning that governments need to deliver much stronger pledges when they are revised in 2020.'' "Should the United States follow through with its stated intention to leave the Paris agreement in 2020, the picture could become even bleaker," the statement said, alluding to the Trump administration plans to withdraw the U.S. from the global climate pact.

On the upside, the agency highlights "rapidly expanding mitigation action" and says carbon-dioxide emissions have remained stable since 2014, thanks partly to renewable-energy use in China and India. It cautioned that other greenhouse gases like methane continue to rise, however. UNEP trumpets the positive effects of investment in solar and wind energy and efficient appliances and cars, and efforts to preserve forests.

UN Environment Report Urges Revived Effort to Cut Emissions

 

[CrusaderFrank]

‘Runaway greenhouse’ may be easier to trigger than previously thought, study finds



Scientists estimate that in the inner edge of “habitable zone” of a star, the runaway greenhouse stage begins.

According to a study published July 28 in Nature Geoscience, astronomers at the University of Washington and the University of Victoria say that it may be easier than previously thought for a planet to overheat during the so-called “runaway greenhouse” stage (See the study here: “Low simulated radiation limit for runaway greenhouse climates”).

During the runaway greenhouse stage, a planet absorbs more solar radiation than it can bounce back to outer space, which causes the planet to lose equilibrium and overheat. When this occurs, the oceans and other large bodies of water evaporate and saturate the atmosphere with steam. This leaves the planet uninhabitable – akin to the conditions scientists have observed on Venus.

Scientists estimate that in the inner edge of “habitable zone” of a star, the runaway greenhouse stage begins. When scientists reevaluated this classic planetary science scenario with novel computer modeling, they discovered that the runaway greenhouse stage had a lower thermal radiation threshold than previously believed.

Read more: ?Runaway greenhouse? may be easier to trigger than previously thought, study finds | Science Recorder

What a joke, Matty. CO2 has been up to over 7,000 PPM and the Earth was still habitable.

If you're truly this gullible, next time you post a "Habitable exoplanet found" posts don't ignore my "Whats the CO2 concentration" question in response

 

[Billy_Bob]

‘Runaway greenhouse’ may be easier to trigger than previously thought, study finds



Scientists estimate that in the inner edge of “habitable zone” of a star, the runaway greenhouse stage begins.

According to a study published July 28 in Nature Geoscience, astronomers at the University of Washington and the University of Victoria say that it may be easier than previously thought for a planet to overheat during the so-called “runaway greenhouse” stage (See the study here: “Low simulated radiation limit for runaway greenhouse climates”).

During the runaway greenhouse stage, a planet absorbs more solar radiation than it can bounce back to outer space, which causes the planet to lose equilibrium and overheat. When this occurs, the oceans and other large bodies of water evaporate and saturate the atmosphere with steam. This leaves the planet uninhabitable – akin to the conditions scientists have observed on Venus.

Scientists estimate that in the inner edge of “habitable zone” of a star, the runaway greenhouse stage begins. When scientists reevaluated this classic planetary science scenario with novel computer modeling, they discovered that the runaway greenhouse stage had a lower thermal radiation threshold than previously believed.

Read more: ?Runaway greenhouse? may be easier to trigger than previously thought, study finds | Science Recorder

BWHAAAAAAAaaaaaaaaaaaa

ROFLMAO.....

OMG!!!!! I havent laughed so hard in my life..

Where do you come up with this GARBAGE... The Composition of our atmosphere will not allow this to occur until all water is evaporated off the face of the earth..

The whole article is in direct conflict with known physics...

You guys really are desperate!!