Andrei.Hicks wrote on Dec 9^th, 2010 at 12:13pm:




That maybe man-made climate change then, or perhaps a greens supporter can help clarify this.

I guess it could be natural climate change.
So again we must implement policies to counter natural climate change - to save Mars, and the Martians.

CLIMATE change sceptics have seized on news that Mars is heating up to back their claim that humans are not causing Earthly global warming.

The research comes from US planetary scientists, who suggest the Red Planet warmed by about 0.65C from the 1970s to the 1990s, similar to Earth's 0.6C average temperature rise during the 20th Century.

"It could be coincidental or it might be the needle in the haystack," said climatologist William Kininmonth, former head of the National Climate Centre in Melbourne.

"It's an interesting observation, as it's the same time period as Earth's temperature has been warming."

Mr Kininmonth said the research, published in the journal Nature, showed there was enough natural climate variability to account for global warming on Earth.

Not so, claimed Neville Nicholls, a climate scientist at Monash University in Melbourne.


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"The paper is interesting but it hasn't got anything to do with the question of human impact on global warming on Earth," Dr Nicholls said.

"It's not an excuse to argue that humans are not causing global warming on Earth."

The research was done by a team led by Lori Fenton of the NASA Ames Research Centre at Moffett Field, California.

They used a computer model based on those devised to study global warming on Earth, adding Martian features such as a cold, airless surface and a shifting south polar ice cap while subtracting Earth's oceans and atmosphere.

Dr Fenton's group found that annual variation in the solar radiation reflected from the surface of Mars - its "albedo" - contributed to the warming by causing more blowing dust.

Over the past 30 years the dust swept clean large swaths of the planet's surface, reducing reflected radiation.

The result was a "positive feedback loop" between dust, wind, albedo and temperature.

"It's a nice piece of work," said UNSW climate scientist Andy Pitman.

"But there are no implications for Earth."

Professor Pitman was lead author of the climate modelling section of the Intergovernmental Panel on Climate Change report released in February.

Professor Pitman disputed Associate Professor Franks' claim that changes in Earth's albedo had a bigger influence on climate than greenhouse gases such as carbon dioxide.

"Albedo is included in climate models," Professor Pitman said.

"It can have a local effect but cannot explain the observed warming record."

The Australian


http://www.perthnow.com.au/mars-warming-like-earth/story-e6frg4nl-1111113290972

Andrei.Hicks wrote on Dec 9^th, 2010 at 12:22pm:




Yes and in the last 3 years ?


There is a reason why the denialist dumped this line a couple of years ago ... keep on digging

____ wrote on Dec 9^th, 2010 at 12:25pm:


You can keep struggling with this line of argument greens, but it's not going to work....

Earth's temp increased (in a century) by a little less than Mars' temp increased in 20 years.....There are NO known industries on Mars, so action other than 'natural' cannot be the cause of the Mars increase.

And since the Earth has warmed slower than Mars then human action cannot be blamed for the temperature increases on Earth....

Climate Change/Global Warming is a perfectly natural phenomenon and nothing we do can accelerate it or deccelerate it....

gizmo_2655 wrote on Dec 9^th, 2010 at 12:33pm:



Since Mars rotation isn't the same as Earths, then can we expect exact temp increases across all planets?

I just like you guys to dig your hole a little deeper before we put you out of your misery.

Quote:


It amazes me just how stupid people are that think all the pollution of the industrial age and particularly the last 60 years could not affect the environment. At least they're a minority.