NASA | Arctic Sea Ice 101

NASA climate scientist Tom Wagner provides a look at the state of Arctic sea ice in 2009 and discusses NASA's role in monitoring the cryosphere.

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[emactan]

gary's point is well taken. We do need to beware of the post hoc ergo propter hoc fallacy. Sonic has good point as well. What needs to be established is that the correlation between human activity and climate change is in fact causal in nature and that if it is so that it is a major/significant causal factor

[goggle]

You must have problem differentiation minimum and maximums.

"the minimum ice area ever observed in the Arctic was 3293737.4 km2 on 08/07 in year 2009" - NERSC web site.

[FourthRoot]

"... in the past few years we've seen a dramatic summer melting that takes the ice back to a point that's far far far smaller then we've ever seen it before."

Yes, if by "we" you mean "NASA" and not "humans".

The Chinese Navy were able to sail to the north pole during the medieval warm period. The earth is warmer today than it's been in the last couple hundred years, but not the last 1000 years.

[FourthRoot]

I'll concede the Chinese North pole story. To be honest I had heard about it in a video rebutting GW alarmism, but not bothered to verify it.

One thing that is true, however is the existence of viking farms in Greenland that are now covered in permafrost and ice. The medieval warm period DID exist and the temperature was even warmer than today.

[renroca]

The only thing this video tells me indefinitely, is that this guy has more questions than answers.

[FourthRoot]

A solution to what? Did he identify a problem?

[cypress]

@GoneBad666 Only 2% of the scientists disagrees (which are funded by multinational oil company's to look like 98%).

And making clean energy isn't so bad i think. Energy based on co2 pollution ís bad in my opinion.

[FourthRoot]

"CO2 warming dominates the data."

What are you talking about? Are you referring to the correlation of CO2 and temperature that Al Gore showed off? If so, I bet you didn't realize that the CO2 lags the temperature by about 800 years. Temperature changed first.

When solar luminance, however, is plotted over temperature we see a total correlation. 90% of the warming over the last 100 years can be attributed to solar activity.

[jtgus]

Space is big, really big But, sometimes there are collisions.

[SonicArchives]

Population of humans went from 2, 521 million in 1950 to 6, 707 million in 2008, to think that this has no affect on planet earth is absurd.

[Forkboy]

What about white rooftops, white streets ect?

[FourthRoot]

Imagine if, rather than parting with 4 years of revenue through bailouts they parted with 4 years of revenue by suspending taxation for 4 years.

[enriqueDFTL]

I'm amazed NASA can keep so many satellites orbiting without colliding. 8)

[RadicalOne]

Or the money that usually goes to the defence department. So much wasted for so little, despite the opportunities staring humanity in the face.

[tantpwei]

In which mythological tale did the Chinese navy sail the north pole during the mythical medieval warmth period?

[murph]

nice fear timelaps video there it goes from the end of winter to the middle part of summer...of course the ice is going to retreat

[murph]

he said it was the first time they've been able to see the average depth of the ice yet then he says it's smaller than it's ever been???? what the hell if it's the first time you've been able to average it what do you have to compare it to?

stupid nasa empoyee is stupid

[cypress]

@Libertarianist They can't explain the recent warming without including man-made co2 pollution in the greenhouse.

[FourthRoot]

Run away climate change is not already here. The earth has been MUCH warmer just a mere 800 years ago. And we're no where near any record high global temperatures on the geological time scale.

[AceofDlamonds]

And the refreezing every decade is significantly smaller than the decade before it. Pay attention nitwit, or at least go read an Earth Science book.