As noted earlier, there has been a failure of an instrument on one of the satellites used to measure sea ice. As a result, NSIDC (the National Snow and Ice Data Center) has suspended their sea ice extent reporting.
I’ve released the first file of daily data for the Climate Data Service, which includes both sea ice extent (from NSIDC) and sea ice area (from UIUC, the Univ. of Illinois at Urbana-Champaign). They make it easy to see that a glitch has indeed happened
Here’s the extent for the northern hemisphere, with four recent values circled in red:
Here are the anomaly values:
The glitch isn’t just evident, it’s glaring. It doesn’t just affect northern hemisphere data, but the southern as well:
There also appears to be some trouble with sea ice area as reported by UIUC. Here’s the northern hemisphere area:
Here’s the northern hemisphere area anomaly:
Here’s southern hemisphere area:
And, of course, southern hemisphere area anomaly:
The very recent data are so far out of line, that I doubt even the denizens of WUWT will spin conspiracy theories; it’s just an obvious instrument failure.
NSIDC says they’re working on the problem, I’m confident that UIUC is as well. I haven’t yet looked at data from JAXA, but I’ll be including it in future releases from the Climate Data Service. Just a few days ago, I considered it superfluous because of the better time coverage from NSIDC and UIUC — but it may turn out to be an important resource to fill in some gaps while they work on the other products.
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It’s a travesty that NSIDC is trying to hide the incline
“The very recent data are so far out of line, that I doubt even the denizens of WUWT will spin conspiracy theories; it’s just an obvious instrument failure.”
I do wanna bet, if the bet is carefully defined enough:
OSI which uses the same satellite has already initiated a switch over to a new sensor:
Due to the previously reported problems with one of the channels on SSMIS
onboard DMSP F17, OSI SAF is now working on replacing DMSP F17 with DMSP
F18 in our sea ice products.
Currently, the switch to F18 has been implemented for the ice concentration
product (OSI-401). The product dated 20160410 has been reprocessed and is
available on our FTP server, ftp://osisaf.met.no/prod/ice/conc/ and
The ice edge and type products (OSI-402 and OSI-403) will be updated to use
F18 tomorrow, 2016-04-12.
Tamino – “I doubt even the denizens of WUWT will spin conspiracy theories”
Wanna bet? You may wish to read this first though:
Global Sea Ice “Comeback” Conspiracy
Judy Curry was at the head of the queue to claim a “comeback”. Willard wasn’t far behind.
Doc – How many of my comments on the WUWT post you reference can you spot?