Social Media Sidebar

Announcement

Please sign up, comment on articles and bring your friends!

Current poll

PlanetTech is asking:

What do you think about our new web site?

Love it, indeed
Really good solution
Same as old one
The old one was better
This is a new option

Quote of the day

We are all now connected by the Internet, like neurons in a giant brain.

 

Stephen Hawking

 

Extreme hot spells rising

RATE THIS! +2
Posted in Science on 13th Aug, 2012 05:14 PM by AlexMuller

It’s not your imagination. Not only are extremely hot temperatures occurring more frequently across the globe, but those heat waves are getting more severe.

 

Back in the 1950s, temperatures on any given summer day were just as likely to be near average as they were to be unseasonably high or low. Climatologist James Hansen of NASA’s Goddard Institute for Space Studies in New York City likens that scenario to rolling a die with two sides each corresponding to low, average and above-normal temperature.

 

Since the 1980s, that metaphorical die has increasingly become weighted toward delivering a warm day, Hansen and his coworkers report August 6 in the Proceedings of the National Academy of Sciences. In fact, Hansen says, since 2000 it’s as though on any roll almost 4.5 sides will draw hotter than average summer heat.

 

Hansen says the study also suggests that a new level of extreme heat is emerging “that almost never occurred 50 years ago.” Formerly striking about 0.2 percent of the Northern Hemisphere in any given summer, this degree of anomalous warmth now strikes about 10 percent of the land area. Within a decade, his data suggest, these hot spells could reach 16.7 percent of the hemisphere's summer weather.

 

“We’re not showing that this is a consequence of an increase in carbon dioxide and other greenhouse gases,” Hansen says. In fact, his team’s analysis makes no attempt to attribute the underlying source of warming to any particular cause. He does volunteer, however, that there is “a strong consensus within the scientific community that the warming we’re seeing is primarily a response to an increase in greenhouse gases.”

 

Markus Donat and Lisa Alexander of the University of New South Wales in Sydney reported similar conclusions online July 31 in Geophysical Research Letters. Their group integrated daily temperature changes at monitoring stations across the globe to identify a shift toward warmer temperatures globally and year-round — with more days of extreme heat.

 



Read original article » Back to category

Comments



 

Recent headlines

  • Posted in Business on 2017-05-27 11:41:40
    Google reportedly launched an AI investment program..read more
    Posted in Software on 2017-05-27 11:31:03
    How chatbot artificial intelligence will evolve over the.....read more
    Posted in Medicine on 2017-05-27 11:24:28
    Mind-Controlled Computer Retrains Stroke Victims' Brains.....read more
    Posted in Business on 2017-05-26 15:00:47
    Solar jobs growing 17 times faster than US economy..read more
    Posted in Science on 2017-05-26 14:50:23
    Schiaparelli: Crashed lander was ill-prepared for Mars..read more
Posted in Business on 2013-10-10 01:33
China is working towards a manned lunar mission in about.....read more
Posted in Business on 2013-10-20 07:17
Spacex says China is their main competitor for commercial.....read more
Posted in Software on 2013-10-20 06:43
Pirate Bay Browser Clocks 1,000,000 Downloads..read more
Posted in Medicine on 2013-10-10 02:10
Google reportedly investing hundreds of millions into new.....read more
Posted in Medicine on 2013-10-14 03:13
Endothelial Cells Can Repair and Regenerate Organs,.....read more
Posted in Science on 01.01.2010
Spacex says China is their main competitor for commercial.....read more
Posted in Science on 01.01.2010
Staring at Your Phone Could Be Making You Short Sighted..read more
Posted in Science on 01.01.2010
Oculus Rift virtual reality headset coming to mobile, but.....read more
Posted in Science on 01.01.2010
China is working towards a manned lunar mission in about.....read more
Posted in Science on 01.01.2010
Delivering drugs via nanoparticles to target mitochondria..read more

Recent Blog Posts

  • Posted by AlexMuller
    Nanoparticle vaccine shows potential as immunotherapy to fight.....read more
    Posted by AlexMuller
    Obesity is top cause of preventable life-years lost, study shows..read more
    Posted by AlexMuller
    Light can be utilized to control gene function..read more
    Posted by AlexMuller
    Brain stimulation restores memory during lapses, research shows..read more
    Posted by AlexMuller
    Wax worm caterpillar will eat plastic shopping bags: New.....read more

Login to your Account

Login to your PlanetTech Account here

Username:
Password:
Remember me
or

Create a New Account

You just need username and password

The following errors occured:
Username:
Email:
Password:
Verify password:
Remember me