The Blackboard

As summer grows old my red hot peppers ripen I need recipes! This summer the Chicago area has been a bit hot and amazingly humid. I live in the burbs, and sneak veggies into spots planting hot peppers, tomatoes and basil along the side of the house. All are doing just fine. I always grow [...]

I just wanted to give a quick shout out for MoshTemp, frequent climate blog commenter Steve Mosher’s new blog. He’s focusing on temperature reconstructions, providing code in R and discussing R issues in general. Welcome to blogging Steve!

HadCrut and GISTemp have both reported their July anomalies. The HadCrut NH/SH anomaly of 0.529C represents a very slight drop from July’s 0.532; the GISTemp anomaly of 0.55C is a somewhat larger drop from July’s value of 0.58C. Below monthly anomaly values since 1980 are shown for HadCrut, and GISS respectively: There are several interesting [...]

A recent guest post by Willis Eschenbach over at WUWT addresses the temperature record in Nepal, with a focus on a particular line in the recent IPCC Fourth Assessment Report Working Group 2. In table 10.2.2, the IPCC reports that temperatures in Nepal have been increasing by “0.09°C per year in Himalayas and 0.04°C in [...]

Congratulations to Steve, Ross and Chad for * **McKitrick, Ross R., Stephen McIntyre and Chad Herman (2010) “Panel and Multivariate Methods for Tests of Trend Equivalence in Climate Data Series” in press at Atmospheric Science Letters. (in press). I downloaded today, and I’ve been reading discussions at various blogs. I’m rather glad I waited to [...]

Today, Roger jr asks for a “naive forecast” for a mystery process providing us a data set and ask us how we would create the naive process. The only thing we know about the data is that observations have been made over some periods of time, our goal is to suggest what we would predict [...]

HadCrut June data are in. I don’t know if I missed the alert earlier, or if I just happened to catch this before the alert arrived. Either way, the temperature anomaly was 0.534C making it the 2nd warmest HadCrut June anomaly, exceeded by June 1998. Temperature anomalies since 1980 are shown below with June anomalies [...]

Much digital ink was spent over the weekend castigating GISTemp for the supposed sin of mixing up the land and ocean areas of the earth. Frank Lansner (and Bob Tisdale, in a somewhat more nuanced post) both points out that to successfully replicate the global land/ocean GISTemp record requires a weighting ratio of around 70% [...]

GHCN contains two main data files on their server: v2.mean, which is the unadjusted data from CLIMAT reports (with minimal QC) and v2.mean_adj, which is the adjusted data. GHCN adjusted data isn’t actually used in many places; GISTemp and HadCRUT take in the raw data and do their own adjustments. We had assumed, however, that [...]

Something I’ve been hoping for happened: the AMSU-A now displays a baseline mean, max and min to the data reported for AQUA Channel 5. You can now request a plot that shows data for years 2002-now, the record high, record low and average. I don’t know if the average is for a baseline period, or [...]