The other day the NSIDC released an image of a graph which was of the recent levels of Arctic Sea Ice Extent. The graph indicated there was a huge anomaly; a rapid and significant decrease in sea ice extent. Most expected an explanation or notation about the sudden drop to be posted by NSIDC. None came.
A few websites / blogs (ICECAP and Watts Up With That among them) posted the image and questioned the validity of the data. Certainly there was an error. There had to be. Eventually, at Watts Up With That, Dr. Meier of the NSIDC posted an explanation. He stated there seemed to be a data error and they were reviewing recent data. He also chastized Anthony; asking why it was felt the matter was news
worth blogging about. A few points about the issue:
1) The NSIDC published the graph inclusive of the error without notation or explanation. None was added later. Thus it appeared they were simply accepting their data without questioning the huge anomaly. That is worth attention and discussion.
2) As the events unfolded, the NSIDC seemingly reviewed the data ONLY after bloggers drew attention to the obvious problem. The NSIDC may have been reviewing the matter all along but they also;
a) failed to make notation on their website of a potential error.
b) left the invalid data graph posted as if it was valid.
One problem with their action is the posting of the image in the first place. I can just see Al Gore, James Hansen, or one of the other wacko freaks taking it and turning the fictitious loss of ice into a major media event. Can you see Gore claiming all of the Arctic Ice would be gone in 45 days? That type of scenario is historically compounded by the massive media coverage of the bogus information and NO media coverage of reality or later correction.
An example:
Arctic sea ice coverage was at its sixth lowest January extent since satellite records began in 1979, according to the National Snow and Ice Data Center. Average ice extent during January was 5.43 million square miles.
This was released in a number of news outlets -
Denver Weather Examiner: January was seventh warmest for globe
And was also part of the larger NOAA January report -
NOAA - National Oceanic and Atmospheric Administration - [title]
Will NSIDC issue a correction to the media? Not on your life. Even if they did the odds of the media giving it any attention are slim to none.
The bloggers did nothing wrong, they identified an issue. The NSIDC did error. They posted bad data without notation, they failed to add notation (seemingly ignorant of the error), and they attacked bloggers for doing the right thing in drawing attention to the error.
Was it an error? Yes.
There was catastrophic failure of a sensor on the Defense Meteorological Satellite Program (DMSP) satellite. The failure caused the false data and incorrectly showed a massive loss of sea ice.
Is that the end of it? No.
It now appears that the sensors performance had been degrading for an extended period; assumed to be inclusive of the last two months or so. Hence, all of the data during that period is incorrect. The early evaluation by the NSIDC is that the satellite was under-reporting the extent of sea ice by 500,000 square kilometers.
THIS is the source of all of the "melting glacier" mania you have posted, a result of faulty data.