Sharpening a Cyclical Shovel

Guest Post by Willis Eschenbach There are a number of lovely folks in this world who know how to use a shovel, but who have never sharpened a shovel. I’m not one of them. I like to keep my tools sharp and to understand their oddities. So I periodically think up and run new tests…

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Mauna Loa Daily Meteorology

Guest Post by Willis Eschenbach As a confirmed data junkie, I’m fond of hourly data. The interesting processes in the climate system unfold on the scale of minutes and hours, not years. So I picked up a project I’d started a while ago, but as is too often the case I’d gotten sidetractored by ……

Approximately 92% (or 99%) of USHCN surface temperature data consists of estimated values

An analysis of the U.S. Historical Climatological Network (USHCN) shows that only about 8%-1% (depending on the stage of processing) of the data survives in the climate record as unaltered/estimated data. Guest essay by John Goetz A previous post showed that the adjustment models applied to the GHCN data produce estimated values for  approximately 66% of…

Lags and Leads

Guest Post by Willis Eschenbach I’ve been thinking about thermal lags in the climate system. Everyone is familiar with thermal lag in everyday life. When you put a cast-iron pan on the stove flame, it doesn’t heat up instantly. Instead, the warming process starts instantly, but it takes some amount of time to actually up…