* Astronomy

Members Login
Username 
 
Password 
    Remember Me  
Post Info TOPIC: Greenhouse Gases


L

Posts: 131433
Date:
RE: Greenhouse Gases
Permalink  
 


Scientists at NASA and Jet Propulsion Laboratories this work released seven years of climate data. The information gives scientists some of the first accurate data of how carbon dioxide piles up in the atmosphere.
For example, the information could help researchers get closer to finding out how much of global warming is due to the solar cycle, and how much is due to greenhouse gases. Radiation intensity from the sun varies on an nine-to-14 year cycle, according to NASA.

Read more

__________________


L

Posts: 131433
Date:
Permalink  
 

EU nations commit $3.6 billion a year to global climate fund, seek to rescue 'green' image
EU leaders agreed Friday to commit euro2.4 billion ($3.6 billion) a year until 2012 to help poorer countries combat global warming, as they sought to rescue their image as climate change innovators and bolster the talks in Copenhagen.

Read more

__________________


L

Posts: 131433
Date:
Permalink  
 

Retreating ice in Antarctic has allowed tiny aquatic plants to flourish and absorb 3.5 million tonnes of carbon from the ocean and atmosphere annually.
Researchers from the British Antarctic Survey say the new "carbon sink" of phytoplankton is equivalent to discovering a forest the size of Wales.

Read more

__________________


L

Posts: 131433
Date:
Permalink  
 

Earth 'heading for 6C' of warming
CO2 emissions rose by a quarter in the last decade, setting the course for a world up to 6C warmer, according to research.

Read more

__________________


L

Posts: 131433
Date:
Permalink  
 

Researcher will be allowed to publish his paper after making 'tiny' changes.
An Australian researcher involved in a censorship controversy will be allowed to publish a paper critical of cap-and-trade systems for controlling carbon emissions - but only after some changes are made to wording, the country's science agency has said.

Read more

__________________


L

Posts: 131433
Date:
Permalink  
 

A new website launched today by Oxford University tracks how fast we are approaching total global emissions of a trillion tonnes of carbon - a level which, if reached, recent research suggests will result in dangerous global warming in excess of 2C.
trillionthtonne.org, hosted by the Oxford e-Research Centre, currently predicts that the trillionth tonne will be reached in March 2045, but this date is advancing as manmade carbon emissions gradually accelerate.

Source

555,483,139,437 ...tonnes of carbon.

__________________


L

Posts: 131433
Date:
Permalink  
 

Last time carbon dioxide levels were this high: 15 million years ago
You would have to go back at least 15 million years to find carbon dioxide levels on Earth as high as they are today, a UCLA scientist and colleagues report Oct. 8 in the online edition of the journal Science.

"The last time carbon dioxide levels were apparently as high as they are today - and were sustained at those levels - global temperatures were 5 to 10 degrees Fahrenheit higher than they are today, the sea level was approximately 75 to 120 feet higher than today, there was no permanent sea ice cap in the Arctic and very little ice on Antarctica and Greenland" - Aradhna Tripati, a UCLA assistant professor in the department of Earth and space sciences and the department of atmospheric and oceanic sciences.

Read more

__________________


L

Posts: 131433
Date:
Methane hydrates
Permalink  
 


Methane gas likely spewing into the oceans through vents in sea floor
Scientists worry that rising global temperatures accompanied by melting permafrost in arctic regions will initiate the release of underground methane into the atmosphere. Once released, that methane gas would speed up global warming by trapping the Earth's heat radiation about 20 times more efficiently than does the better-known greenhouse gas, carbon dioxide.

Read more

__________________


L

Posts: 131433
Date:
RE: Greenhouse Gases
Permalink  
 


Scientists say they have evidence that the powerful greenhouse gas methane is escaping from the Arctic sea bed.
Researchers say this could be evidence of a predicted positive feedback effect of climate change.
As temperatures rise, the sea bed grows warmer and frozen water crystals in the sediment break down, allowing methane trapped inside them to escape.

Read more

__________________


L

Posts: 131433
Date:
Paleocene-Eocene Thermal Maximum
Permalink  
 


A huge amount of global warming transformed the Earth into a hothouse 55 million years ago, but the cause remains a mystery, scientists stated on Monday.
Prior research into the Paleocene-Eocene Thermal Maximum, or PETM, notes that the planet's surface temperature increased by between 9 and 16.2 degrees Fahrenheit in just several thousand years.
The Arctic Oceans median temperature rose to 73 degrees, or the temperature of a lukewarm bath.
PETMs heat wave is enigmatic, but climatologists desperately want to find out the cause, in hopes that it will shed light on current global warming trends.
Although a lot of the scientific evidence is indistinct, what is clear is that large quantities of natural greenhouse gases were expelled in a short amount of time.

Read more

__________________
«First  <  1 2 3 4 5 614  >  Last»  | Page of 14  sorted by
Quick Reply

Please log in to post quick replies.



Create your own FREE Forum
Report Abuse
Powered by ActiveBoard