Yearly Archives: 2007

The New “IPCC Test” for Long-Term Persistence

In browsing AR4 chapter 3, I encountered something that seems very strange in Table 3.2 which reports trends and trend significance for a variety of prominent temperature series (HAdCRU, HadSST, CRUTem). The caption states: The Durbin Watson D-statistic (not shown) for the residuals, after allowing for first-order serial correlation, never indicates significant positive serial correlation. […]

Bürger Comment on Osborn and Briffa 2006

Gerd Bürger published an interesting comment in Science 2006 on cherry-picking in Osborn and Briffa 2006. A few CA readers have noticed the exchange and brought it to my attention. Eduardo Zorita (who I was glad to hear from after our little dust-up at the Nature blog) sent me the info as did Geoff Smith. […]

NOAA and the Three Monkeys

In a website release earlier this year, NOAA proudly announced the extensive involvement of its officers in IPCC as lead authors, review authors and even the co-chair of IPCC WG1, Susan Solomon, a senior scientist of the NOAA Earth System Research Laboratory in Boulder, Colo., is co-chair of Working Group 1 (WG1), the Physical Science […]

IPCC and the Briffa Deletions

I’ve posted on several occasions on the deletion of the “inconvenient” section of the Briffa reconstruction. Now that the review comments are online, I want to reprise this, just so you can understand the IPCC process a little better. This repeats some earlier material. As an IPCC reviewer, I Show the Briffa et al reconstruction […]

Alexander et al 2007

For those of you who want a thread on this paper (which I don’t have time to read right now)” http://nzclimatescience.net/images/PDFs/alexander2707.pdf This study is based on the numerical analysis of the properties of routinely observed hydrometeorological data which in South Africa alone is collected at a rate of more than half a million station days […]

IPCC Review Comments Now Online

Well, here is a small accomplishment that I think can reasonably be credited to climateaudit. As we approach the due date for the NOAA FOI responses, IPCC has now put the review comments online. Enjoy.

On to Gridded Data

Gavin Schmidt recently told Anthony Watts that worrying about station data quality was soooo last year. His position was a bit hard to follow but it seemed to be more or less as follows: that GISS didn’t use station data, but in the alternative, as defence lawyers like to say, if GISS did use station […]

Gavin Schmidt: station data "not used" in climate models

Gavin Schmidt has told Anthony Watts that the problematic station data are not used in climate models and any suggestion to the contrary is, in realclimate terminology, “just plain wrong”. If station data is not used to validate climate models, then what is? His point seems to be that the climate models use gridded data. […]

Stamford CT

Today’s tide at surfacestations.org brought in an eastern site,Stamford Ct, courtesy of Kevin Green. A couple of interesting features, including something really weird with the GISS adjustments.

Unthreaded #13

Continuation of Unthreaded #12