'The daily sea ice extent images are sporadically displaying erroneous data. NSIDC is investigating with our satellite data providers.'

http://nsidc.org/arcticseaicenews/2016/04/a-problem-with-the-f17-dmsp-satellite/

The main problem I see with sea ice is the chunks are too big to fit in your whisky glass.

lee wrote on Apr 12^th, 2016 at 1:25pm:


Of course there are checks and balances that indicate when the images sporadically play up.  It just means that they occasionally have to repeat runs until the check sums are correct. It doesn't affect the integrity of the data (if that's what you are quietly alluding to).

lee wrote on Apr 13^th, 2016 at 3:20pm:


Of course you did. I was just adding my slant to that interesting tit bit.

Relax, I would never accuse you of trying to cast doubt on climate data.

Quote:


and
Quote:

John_Taverner wrote on Apr 13^th, 2016 at 2:57pm:
[/quote]
How salty is it seems to be the question?

lee wrote on Apr 14^th, 2016 at 12:53pm:


Not really, considering that the Greenland Ice sheet receives about a metre of snow every year. If you knew how glaciers work you would realise that objects can still get buried in retreating glaciers.

Or is this just another of your rather gutlessly cryptic attempts to throw a bit of doubt around hoping that some of it might stick.

Chimp_Logic wrote on Apr 15^th, 2016 at 2:23am:




So the extent of sea ice is normal -

no apology required there.

( Antarctica is showing a lot of extra sea ice. )

John_Taverner wrote on Apr 14^th, 2016 at 8:20am:



Very good John.

'The  terminology  related  to  the  aerial  coverage  of  sea  ice  is  closely  linked  to  the observational techniques. Satellite remote  sensing  algorithms  yield  the  fraction  of  the ocean  surface  covered  by  sea  ice  in  a  pixel  of  a  certain  size  (the  size  depends  on  the remote sensing instrument). Sea ice concentration (SIC) is defined as the fraction  covered by sea ice, and sea ice extent is defined as the cumulative area of all  pixels having at least 10%  or 15% SIC. The  threshold  of  10% (World  Meteorological  Organization,  1970) originates  from  pre-satellite  era,  when  the  concentration  was  estimated  for  the  area covered  by visual  observations.  The  15%  threshold  is  commonly  applied  by  the  remote sensing  community  and,  among  others,  the  U.S.  National  Snow  and  Ice  Data  Center (Parkinson and Cavalieri, 2008). Sea ice area is the cumulative sum of the product of the pixel ice  concentration  and pixel area  for  all pixels having  at  least  15% (or  10%) ice concentration.

http://www.arctic.noaa.gov/future/bib/Vihma_accepted_in_Surv_Geophys.pdf

You disagree?

So you cut and pasted something that you don't understand, and ask me if I agree with it?

Here's something that you should understand. It's a picture. 



While you're fretting over small detail in the hope of introducing more confusion, ships are sailing from Asia to Europe via the Arctic.

http://www.japantimes.co.jp/news/2015/10/27/asia-pacific/cosco-announces-arctic-...

Now what was your point?

'State-owned industry giant COSCO has only twice sent a vessel through the Northeast Passage, once in 2013 and again this year.'

From your link.



The picture must have been taken from the accompanying ice-breaker not mentioned in the story.

So what was your point?

BTW lovely pictures of two diametrically opposed points in time.

You do realise the size of the pixels does matter?

lee wrote on Apr 15^th, 2016 at 3:46pm:


Yes. It has been possible this decade for the first time in recorded history.

Lee, why don't you join the excellent Flat Earth Thread. It_is_the_light plays the game of disinformation much better than you. You might pick up some tips.

Quote:


Seasons. You know? Like Summer and Winter.

Professor your such an alarmist shmuck that always wants to get lost in the details, diverting attention away from the bottom line.

There is nothing unusual about the Arctic ice shrinking and increasing looks like its been happening for years.

You know Greenland....??

September 1957 - arctic decreases by 40%

May 1947 - arctic melting

http://trove.nla.gov.au/ndp/del/article/22429983?searchTerm=climate%20change&sea...

November 1922 - arctic melting

http://docs.lib.noaa.gov/rescue/mwr/050/mwr-050-11-0589a.pdf

Chimp_Logic wrote on Apr 20^th, 2016 at 10:56pm:



You mean the bloke who works with John Cook of Skeptical Science "fame"?

If you look at DMI real time ice monitoring stations across Greenland over the 12 month period, you will find this year is on the high side of the 1990-2013 base line average.

2015 also blew away ice record growth. El Nino ends and La Nina begins later this year.

beta.dmi.dk/en/groenland/maalinger/greenland-ice-sheet-surface-mass-budget/

Chimp_Logic wrote on Apr 25^th, 2016 at 12:20am:



Really> Why may I need to?