Tag Archives: mcculloch

Kriging on a Geoid

Aug 26, 2010 – 1:24 PM

Geoff Sherrington and others on the First Difference Method post have requested a post for discussing Kriging. I am new to Kriging myself, so please correct me if I make any errors here. Steve McIntyre (who may be on the beach at the moment!) is far more knowledgeable, and has posted about the topic frequently […]

By Hu McCulloch | Posted in Uncategorized | Also tagged | Comments (41)

Invalid Calibration in Kaufman 2009

Sep 18, 2009 – 12:46 PM

Darrell S. Kaufman, David P. Schneider, Nicholas P. McKay, Caspar M. Ammann, Raymond S. Bradley, Keith R. Briffa, Gifford H. Miller, Bette L. Otto-Bliesner, Jonthan T. Overpeck, and Bo M. Vinther (Science 9/4/2009) propose a reconstruction of Arctic summer land temperatures for the last 2000 years, using 23 diverse proxies. Decadal averages of each proxy […]

By Hu McCulloch | Posted in General, Kaufman 2009 | Also tagged | Comments (35)

Spline Smoothing

Aug 23, 2009 – 2:59 PM

The 2009 Climate Dynamics paper “Unprecedented low twentieth century winter sea ice extent in the Western Nordic Seas since A.D. 1200” by M. Macias Fauria, A. Grinsted, et al. discussed already on the thread Svalbard’s Lost Decades pre-smooths its data with a 5-year cubic spline before running its regressions. There’s been a lot of discussion […]

By Hu McCulloch | Posted in Multiproxy Studies, Sea Ice, Statistics | Also tagged , | Comments (187)