I emailed CT twice since the 24th about their historical data.
All of their archived images from 2000 to Oct 4th 2011 are AMSRE images. They even wrote this on their website:
Quote
Snow and ice data provided by the National Center for Environmental Prediction/NOAA, NSIDC, U. Bremen
Here is just a sample of their archived images.
The 2010 image is AMSRE. The current image comes from NSIDC. The data they got from Bremen came from AMSRE channel 89 ghz that came in the 6.25km format.
The data from SSMIS comes from the channel 91 ghz in 25km format
It's certain the data from 1979-1987 came from NSIDC SSMI channel 85ghz it's pretty much the same as the SSMIS and is in 25k format. Then they acquired SSMIS data from 1987 to whenever they picked up AMSRE data.
Why would they show AMSRE images but still use SSMIS? They would be the only folks in ice tracking ever to do this practice.
Comparing Jaxa amsr2 and amsre data is essentially the same. But the difference between SSMIS and AMSRE is large. Hence why NSIDC single day extent is always higher then Jaxa and Jaxa uses a 2 day running average.
I realize the difference seems trivial. Sure. But I'd at least like to know more about the process.
Also what happened to IJIS area product?
I realize once the ice is pretty much off the shoreline things even out but this would effect June the most. This isn't me whining about area being high versus extent. I don't care. It has no bearing on my beliefs obviously.
But this effect is shown by the simplicity of NSIDC single day and Jaxa converging as the ice melts away from the shorelines and the lower concentration ice vanishes.
Secondly area is effected by concentration directly. Concentration drops area drops it's that simple.
How in the hell is 2010 -700K below 2014 when you look at the two images. Maybe that proves that they always used SSMIS even tho they displayed AMSRE graphics but the AMSR2 graphics and current SSMIS graphics on bremen are pretty similar.
If anyone has any knowledge about CT validation during the period of them using AMSRE graphics please share.