In order to participate in the GunBroker Member forums, you must be logged in with your GunBroker.com account. Click the sign-in button at the top right of the forums page to get connected.
Options
Climate change hits Mars
PC800
Member Posts: 1,650 ✭✭✭✭✭
http://tinyurl.com/33azkm
From The Sunday Times
April 29, 2007
Climate change hits Mars
Mars is being hit by rapid climate change and it is happening so fast that the red planet could lose its southern ice cap, writes Jonathan Leake.
Scientists from Nasa say that Mars has warmed by about 0.5C since the 1970s. This is similar to the warming experienced on Earth over approximately the same period.
Since there is no known life on Mars it suggests rapid changes in planetary climates could be natural phenomena.
The mechanism at work on Mars appears, however, to be different from that on Earth. One of the researchers, Lori Fenton, believes variations in radiation and temperature across the surface of the Red Planet are generating strong winds.
In a paper published in the journal Nature, she suggests that such winds can stir up giant dust storms, trapping heat and raising the planet's temperature.
Fenton's team unearthed heat maps of the Martian surface from Nasa's Viking mission in the 1970s and compared them with maps gathered more than two decades later by Mars Global Surveyor. They found there had been widespread changes, with some areas becoming darker.
When a surface darkens it absorbs more heat, eventually radiating that heat back to warm the thin Martian atmosphere: lighter surfaces have the opposite effect. The temperature differences between the two are thought to be stirring up more winds, and dust, creating a cycle that is warming the planet.
From The Sunday Times
April 29, 2007
Climate change hits Mars
Mars is being hit by rapid climate change and it is happening so fast that the red planet could lose its southern ice cap, writes Jonathan Leake.
Scientists from Nasa say that Mars has warmed by about 0.5C since the 1970s. This is similar to the warming experienced on Earth over approximately the same period.
Since there is no known life on Mars it suggests rapid changes in planetary climates could be natural phenomena.
The mechanism at work on Mars appears, however, to be different from that on Earth. One of the researchers, Lori Fenton, believes variations in radiation and temperature across the surface of the Red Planet are generating strong winds.
In a paper published in the journal Nature, she suggests that such winds can stir up giant dust storms, trapping heat and raising the planet's temperature.
Fenton's team unearthed heat maps of the Martian surface from Nasa's Viking mission in the 1970s and compared them with maps gathered more than two decades later by Mars Global Surveyor. They found there had been widespread changes, with some areas becoming darker.
When a surface darkens it absorbs more heat, eventually radiating that heat back to warm the thin Martian atmosphere: lighter surfaces have the opposite effect. The temperature differences between the two are thought to be stirring up more winds, and dust, creating a cycle that is warming the planet.
Comments
I hate it when that happens.[:D]
How can they tell.
You should listen to Art Bell more often. He's had many Martians on the air
telling of their experiences on and around Mars.[:o)]
It's proven that motor skills deteriorate naturally as BAC increases.
But nobody has ever proven that BAC > 0.08 kills. It is the CAR or sometimes the WALL or at other times the TREE that kills in that case, not the BAC.
Can somebody get me another drink, please?
quote:Zulu7:
How can they tell.
You should listen to Art Bell more often. He's had many Martians on the air
telling of their experiences on and around Mars.[:o)]
Why listen to Art Bell? Just ask *-R-Done here yourself. They're the same person.
That's precisely why I don't worry about how much I drink when I drive.
It's proven that motor skills deteriorate naturally as BAC increases.
But nobody has ever proven that BAC > 0.08 kills. It is the CAR or sometimes the WALL or at other times the TREE that kills in that case, not the BAC.
Can somebody get me another drink, please?
Swing by my place, and you can have an entire 1/2 liter of Captain Morgan Original all to yourself.
quote:Originally posted by spurgemastur
That's precisely why I don't worry about how much I drink when I drive.
It's proven that motor skills deteriorate naturally as BAC increases.
But nobody has ever proven that BAC > 0.08 kills. It is the CAR or sometimes the WALL or at other times the TREE that kills in that case, not the BAC.
Can somebody get me another drink, please?
Swing by my place, and you can have an entire 1/2 liter of Captain Morgan Original all to yourself.
I'll take you up on that offer... [:D][:p]
How can they tell.
Regards, Bob