Search Results for: audit menne et al 2010

Station Homogenization as a Statistical Procedure

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 […]

BEST, Menne Slices

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 […]

Closing Thoughts on BEST

In the 1980s, John Christy and Roy Spencer revolutionized the measurement of temperature data through satellite measurement of oxygen radiance in the atmosphere. This accomplishment sidestepped the intractable problems of creating (what I’ll call) a “temperature reconstruction” from surface data known to be systemically contaminated (in unknown amounts) by urbanization, land use changes, station location […]

NASA GISS – Adjusting the Adjustments

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 […]