Wednesday, September 19, 2007

University of Illinois adjusts Antarctic record sea ice area

The left image was downloaded from The U. of Illinois Cryosphere Today website on September 11th, while the right one was downloaded from the same webpage on September 19th.
Both show the Antarctic sea ice area but the right, newer one has been adjusted down after CT found a record high sea ice area for the Antarctic.

The red bottom line showing the anomaly has visibly changed. It previously featured a constant positive anomaly for most of 2007 while it now displays a rather negative anomaly, especially during the month of August.


At 12:47 PM, Anonymous Anonymous said...

Mikel Mariñelarena- (the post #s have changed, but now start at #335)
It looks like CT has Antarctic ice over 16M sq-km again -- a new record, although nothing has been acknowledged? I presume you have as well, but I've saved the 19-, 23-, & 25-SEP images to capture the adjusted relative max, short-term decline, and new rise of ice area over this recent period. The archive.web site was not saving the antarctic 365, area, & anom images...

mccall (also on CA)

At 6:07 AM, Blogger Mikel Mariñelarena said...

Well done, mccall.
I´ve been on travel and haven´t had the time to check CT or CA but it´s good to see that there are other people interested in monitoring the numerous CT "adjustments" (always in the same direction).
I wrote a courteous email to William Chapman asking for documentation on his adjustment to the Arctic data earlier this year and got nothing in reply. I´d love to know whatever caused that massive curve displacement.
I´m of the opinion that auditing Hansen and Jones is more important today but hopefully some day CT will also receive the scrutiny it deserves. It should actually be much easier.

At 9:28 PM, Blogger Vincent said...


Hi I posted message below accuweather yesterday. Apparently Brett will post a story on this. CT should explain its software "glitches"
or be subject to quality data audit, if it is USA government agency?

Posted on accuweather
Antarctica just past record ice extent 16.1 million sq km? see Cryosphere today. However this ain't news

Reply: I had a piece on this several days ago, and I will do something on it today or tomorrow.

Posted by Vincent | September 27, 2007 12:30 AM

At 3:54 PM, Anonymous Anonymous said...

Hi Mike just to inform you that today 17th December 2007, the NH data in Cryosphere today to this date has been removed/disappeared/lost and that a record of previous date 15/12/07 if you have it would be good to have. We are not insinuating anything by this.

At 6:01 AM, Blogger Mikel Mariñelarena said...

Sorry anonymous, no such luck. But right now, according to their records, the SH anomaly is over 2 million km2 above the average and the NH one is less than 1 million km2 below. In other words, we´re closing 2007 with much more sea-ice than usual.

At 9:05 AM, Blogger Vincent said...

For record purposes again the cryosphere page again has adjusted downwards dated mid-february 2008 hudson bay falls 100% instantly error on page acknowledged but not corrected as of 7th March 2008

At 6:35 PM, Blogger Mikel Mariñelarena said...

Thanks Vincent. If my memory serves that's 3 consecutive "errors" of the same sign in the space of 1 year. Very unlikely indeed. I actually find it difficult to believe that a scientific department of a respectable institution in the US can have such a strong agenda.

At 9:40 AM, Blogger Vincent said...

Hola Miguel

For the record again NH ice is about to cross the forbidden "barrier" I recommend you save the current pages in case they decide they dont like it
BTW not accusing cryosphere but outside influences. SH ice is going way beyond the barrier and has been for 8 months now!!!

At 1:18 PM, Blogger Mikel Mariñelarena said...

Thanks Vincent. Done.

A crossing of the forbidden barrier would really look bad to certain eyes, which must already be pretty irritated by the SH ice behaviour.

At 2:15 AM, Anonymous Sven said...

Good Job! :)

At 12:46 AM, Blogger Vincent said...

Here is another "adjustment" that we all missed Posted on Climate Audit yesterday
Here is the GIF that shows the sea ice anomaly adjustments.

so my verdict data cannot be trusted from this site

At 11:26 AM, Blogger Mikel Mariñelarena said...

Thanks again, Vincent. I don´t know where the image comes from but if, indeed, this is a new adjustment your veredict seems unappealable.

The question is ´what´s the point´? Why keep exagerating when nobody's questioning the NH sea ice decline?

At 11:29 AM, Anonymous Anonymous said...
see comment 389 re ice data retrospective changes ice CT

At 9:27 PM, Anonymous Anonymous said...

Re: SH recently invented warming: You may want might to record this Mike you may want to put thes up as a record again...figure for posterity.. in case its changed soon.
Also this one which has been changed twice already (downwards of course)
Unfortunately the SH ice just keeps coming back..
Also AMSR (norway) did a major change in artic ice recently also down of course might try to post soon

At 7:42 AM, Blogger Mikel Mariñelarena said...

Thank you Anonymous. 1st image saved. But RC, Tamino et al have already coceded that the SH ice-area trend is positive and statistically significant in the satelllite era. No guarantee that there won't be any adjustment, of course, but it would have to be a very big one to change the above conclusion.

As for the 2nd image, have the downward adjustments been recent or do you refer to the ones already discussed here and elsewhere?

Finally, the "new warming" of the SH should not affect the sea ice area records. It's just one study that is receiving a good share of skepticism even from the alarmist AGW camp. Besides, it doesn't affect the Antarctic cooling of the last 30 years.

At 11:51 PM, Anonymous Anonymous said...

tamino and co RC maintained that SH cooling was what was expected of AGW.. they have now changed their minds ahahah again!

At 3:56 AM, Anonymous Anonymous said...

FYI To be kept as a record posted on WUWT today

Can anyone help!!

Regarding melting ice! I left this post a couple of topics back regarding the smoothing of the NSIDC sea ice growth record for 2009. I have been in touch with NSIDC but so far with no response.

Last week for 2 days - I think 10th & 11th Feb, the graph showed a definate up spike - eg sudden growth in sea ice extent. This has now been smoothed away. It’s not the first time this has happened but the odd thing is that it is (by my reckoning) ALWAYS the up spikes that are smoothed downwards rather than the down spikes smoothed upwards. In the summer melt season, whenever sudden down spikes occur, I have to date not seen any smoothed upwards. It is possible I’ve missed them, but it seem to me that the incidence of smoothing up or down should be roughly equal.

Anthony, I wondered whether this might be worth exploring further if it hasn’t happened already?

Posted by "Ben"

At 4:03 PM, Anonymous Anonymous said...


this from WUWT

The satellite underestimated ice by 500000 km2 since jan09 just for the record again probably the previous chnages in much of sea ice data ie norex ect adjustments due to this so all wrong again! However this time NSIDC has acknowled BTW thanks to previous blooger I think he brought to attention of WUWT

At 5:52 PM, Blogger Vincent said...

Hola Again

Looks like all ice SH, NH, Global now back to normal or ABOVE. Just make sure you keep these graphs in case another "correction" is made very soon to keep the ice down LOL.
I think the tale of the tape will be taken off soon as their no tale left!

At 8:40 PM, Blogger Mikel Mariñelarena said...

Well spotted Vincent. In fact, I'm not following CT all that often anymore but, I don't know why, I did check today and noticed the same as you so all those images are already saved for posterity:-) If the NH anomaly hits the 0 line, that will be the first time it happens in several years and very inconvenient for the alarmists.

In any case, as the alarming news keep coming from all sides, the *fact* is that right now, in April 2009, we have roughly 1 million km more sea ice globaly than the last 30-year average (!)

At 8:20 PM, Blogger Vincent said...

Because of numerous previous "downwards adustments of ice extent" it may be wise at this point to peg this one
There is now a permanent record of most of these changes here
In particular cryosphere today does not seem to like it when either SH or NH ice goes up to much and downwards adjustments ALWAYS (LOL) changes due to "computer glitches" are quite common. Take note of current NH ice at cryosphere today and compare with AMSR anyone care to comment?

At 3:33 AM, Blogger Vincent said...

another archiving for future reference...
Check this:Global ice +1.158 two days ago (recorded on this post WUWT), no visibly change on graph SH or NH since then but today +0.7!
this is why files need to be saved!

At 10:55 PM, Anonymous Anonymous said...

Hi Mike I popsted this on WUWT following it appears another "down adjustment by NORSEX, when NH ice was within the 1SD limit!!.

"What the heck is going on? This was posted by S Goddard just last week Quoting this graph, he said that NH ice was back to normal limits 1SD. So is it now a fact that Norsex has again lowered the WHOLE 2008and 2009 graphs or increasecto make it appear that NH ice is still below normal the mean graph? (as I warned many time already and recorded here
. If this is, NORSEX must be a 100% junk site (NORSEX) because neither AMSR, CT, NSIDC or DIM have changed. It appears to be run by one person so check before you believe.

At 11:16 PM, Anonymous Anonymous said...

CT ice "frozen" for 2 weeks now what the heck is happening again! Date of record 17th may, 2009

At 9:25 PM, Anonymous Anonymous said...

This was posted on CA today lets keep for record bet you anything CT will re-adjust down AGAIN!
May 14th, 2009 at 12:01 pm

"William Chapman replied to my email about the recent lack of updates at Cryosphere Today. Apparently a server upgrade broke their graphing software. They expect to have it fixed within the week. Then I'll have to interpolate all the missing data. Groan."

Whata load of ....

At 6:01 PM, Blogger Vincent said...

Just for the record again.. So we don't appear to be biased against anyone. BTW, CT is doing a wonderful job with its satellite graphics and data. CT has in fact updated and it all seems fine. NH ice continues to get closer to "normal". BTW, even if it went the other way (down) it also could have been correct, so we should not jump to conclusions and judge these sites prematurely (this writer = guilty.. oops).

At 2:30 PM, Anonymous Anonymous said...

I think NORSEX ICE has really made another hughe blunder
OT: but here we go once again….. Take your pick which one is correct?
this one:
this one
or this one?
dated 25 May, 2009

At 10:16 PM, Blogger Vincent said...

NH ice is now 100% normal

At 4:20 PM, Anonymous Anonymous said...

astroturfer & cherrypicking?

At 2:48 AM, Anonymous Anonymous said...

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At 11:52 AM, Anonymous Anonymous said...

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At 7:09 PM, Anonymous Anonymous said...

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At 12:54 PM, Anonymous Anonymous said...

Keep and lock this for posterity
Nearly 100% certain that CT, Jaxa, Norsex, NSCDC will not show or adjust DOWN ASAP! (from many past experiences see here:
DATED 29/3/2010 time 454PM EST

At 11:05 AM, Anonymous Anonymous said...

Hi Mike another down adjustment today by NSCD
just for the record

At 9:11 PM, Anonymous Anonymous said...

hi everybody

great forum lots of lovely people just what i need

hopefully this is just what im looking for looks like i have a lot to read.

At 11:31 AM, Anonymous Anonymous said...

For record purposes looks like NH is above normal/normal for at least 2 months now

At 5:38 AM, Anonymous Anonymous said...

Hello man!

It is my first time here. I just wanted to say hi!


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