2010-11-04 09:54:52Ice free arctic
Riccardo

riccardoreitano@tiscali...
93.147.82.189

I was inspired by a post on WUWT but I did not quote it. And needless to say I come to the opposit conclusion.

http://www.skepticalscience.com/icefreearctic.html

2010-11-04 11:09:24
Rob Painting
Rob
paintingskeri@vodafone.co...
118.92.69.72

- 2nd paragraph "that current conditions of a extensively glaciated Arctic has (was) established

- 4th paragraph This findings (finding)

I like it.

2010-11-04 13:54:06Nice job
Daniel Bailey
Daniel Bailey
yooper49855@hotmail...
66.96.96.66

Good stuff!  Perhaps some mention of the analysis done by Tamino (the sea ice extent loss following a quadratic fit) might be nice.

The Yooper

2010-11-04 15:25:45proof read
dana1981
Dana Nuccitelli
dana1981@yahoo...
71.137.148.215

There is evidence (Polyak et. al 2010) that current conditions of an extensively glaciated Arctic were established at the beginning of the Pleistocene, about 3 million years ago.

"the seasonal Arctic sea ice cover was strongly reduced during most of the early Holocene and there appear to have been periods of ice free summers in the central Arctic Ocean." This finding lowers the "threshold" for an ice free summer to a few degrees centigrade of warming.

But as the figure itself shows, the projection does not agree well with the real world.

Good article - easy to follow.

2010-11-05 09:11:28
Riccardo

riccardoreitano@tiscali...
93.147.82.177
Updated. I made the corrections and added the analysis of NSIDC data with a figure as suggested by Daniel.
2010-11-07 03:16:14
Riccardo

riccardoreitano@tiscali...
93.147.82.71
I'll give it a last thought and go live later today.
2010-11-07 04:55:40minor edits
dana1981
Dana Nuccitelli
dana1981@yahoo...
71.137.148.215

You have an extra period in this sentence: "A recent review on arctic ice variability suggests that "the seasonal Arctic sea ice cover was strongly reduced during most of the early Holocene and there appear to have been periods of ice free summers in the central Arctic Ocean."."

The text on the y-axis of your first figure is illegible.  It would be nice to make that clearer if possible.

I would change this - "The linear fit (not shown) gives a trend of -0.08*106 Km2/yr"

To this - "The linear fit (not shown) gives a trend of 80,000 square kilometers of sea ice extent loss per year, or about...."

I would add a comma here - "In summary, we know that a summer ice free arctic is possible, that it does not require extremely high temperature, that we're not far from there, and that the downward trend is accelerating."

Also technically there should be a hyphen in "ice-free".

Nice article.

2010-11-07 11:26:59
Riccardo

riccardoreitano@tiscali...
93.147.82.71
Done and published. Thank you all.
2010-11-07 11:32:16
Riccardo

riccardoreitano@tiscali...
93.147.82.71
Actually it didn't get published, don't know why. But I know that it's 1:30 in the morning here, it can wait for tomorrow :)
2010-11-08 10:16:43Publishing time
John Cook

john@skepticalscience...
124.186.160.198
Ah, this is where it gets confusing - the server time is Perth, Australia time.
2010-11-08 10:18:43Critique of your blog post
John Cook

john@skepticalscience...
124.186.160.198

BTW, Riccardo, in case you didn't see this thread on the General Forum, there is a skeptic blog post critiquing your post:

http://denialdepot.blogspot.com/2010/11/how-to-cook-graph-skepticalsciencecom.html

It has to be one of the funniest things I've read. I don't think even Steve Goddard could post something this stupid. Well, hard to say - they both seem to racing to the bottom.

 

2010-11-08 10:28:19Poe's Law
dana1981
Dana Nuccitelli
dana1981@yahoo...
71.137.148.215
Heh John, Denial Depot is a mock denier site.  Clearly a great example of Poe's Law - they fooled you :-)
2010-11-08 19:08:36
Riccardo

riccardoreitano@tiscali...
192.84.150.209
They so clearly explain how to cook a graph to hide something that I thought it was a parody. But then I read of Poe's law ...