Tag Archives: homogenization

Station Homogenization as a Statistical Procedure

Jul 17, 2012 – 8:51 AM

Temperature stations are known to be affected by numerous forms of inhomogeneity. Allowing for such inhomogeneities is an interesting and not very easy statistical problem. Climate scientists have developed some homemade methods to adjust for such homogeneities, with Menne’s changepoint-based algorithm introduced a few years ago in connection with USHCN among the most prominent. Although […]

By Stephen McIntyre | Posted in Surface Record, Uncategorized | Also tagged , , | Comments (128)

BEST, Menne Slices

Oct 31, 2011 – 12:36 PM

A couple of years ago, Matthew Menne of NOAA applied a form of changepoint algorithm in USHCN v2. While changepoint methods do exist in conventional statistics, Menne’s use of these methods to introduce thousands of breaks in noisy and somewhat contaminated data was novel. BEST’s slicing methodology, in effect, implements a variation of Menne’s methodology […]

By Stephen McIntyre | Posted in Uncategorized | Also tagged , | Comments (75)

NASA GISS – Adjusting the Adjustments

Dec 26, 2010 – 10:42 AM

As a simple exercise, I quickly revisited the everchanging Hansen adjustments, a topic commented on acidly by E.M. Smith (Chiefio) in many posts – also see his interesting comments in the thread at a guest post at Anthony‘s, a post which revisited the race between 1934 and 1998 – an issue first raised at Climate […]

By Stephen McIntyre | Posted in Uncategorized | Also tagged , , , , , | Comments (247)

Leopold in the Sky with Diamonds

May 27, 2008 – 7:45 AM

Radiosonde trends are back in the news. A few days ago, on May 24, 2008, Realclimate reviewed three recent papers: Lanzante and Free (J Clim 2008), Haimberger et al (J Clim 2008) and Sherwood et al 2008, adding a note with the even more recent Allen and Sherwood (2008.) Peter Thorne of Hadley Center stated […]

By Stephen McIntyre | Posted in Satellite and gridcell | Also tagged , , | Comments (112)