The Little Ice Age – Back to the Future

What’s Natural By Jim Steele Extreme scientists and politicians warn we will suffer catastrophic climate change if the earth’s average temperature rises 2.7°F above the Little Ice Age average. They claim we are in a climate crisis because average temperature has already warmed by 1.5°F since 1850 AD. Guided by climate fear, politicians fund whacky…

SIGNAL CONVOLUTION, MIDPOINT OF RANGE, AND ALL THAT

KEVIN KILTY Introduction A guest blogger recently1 made an analysis of the twice per day sampling of maximum and minimum temperature and its relationship to Nyquist rate, in an attempt to refute some common thinking. This blogger concluded the following: (1) Fussing about regular samples of a few per day is theoretical only. Max/Min temperature…

Another bureau rewrite warms Australia’s climate history

By Chris Gilham, Did you know that Australia’s rate of temperature warming per decade since 1910 has increased by 23%? No? Neither does the Australian public, despite the Bureau of Meteorology several weeks ago releasing a new ACORN dataset of daily temperatures over the past 109 years that significantly rewrites Australia’s climate history. ACORN 1 (Australian…

Nyquist, sampling, anomalies and all that

Guest post by Nick Stokes, Every now and then, in climate blogging, one hears a refrain that the traditional min/max daily temperature can’t be used because it “violates Nyquist”. In particular, an engineer, William Ward, writes occasionally of this at WUWT; the latest is here, with an earlier version here. But there is more to…

Update: The Global Warming Challenge

Reposted from theclimatebet.com 2018 year ends on a low note, temperature wise The UAH global mean temperature anomaly data for December 2018 is out: the figure of 0.25°C. The average for the year was 0.23°C, with a maximum anomaly of 0.32°C and a minimum of 0.15°C. None of those figure is much different from the…

Greenland Is Way Cool

Guest Post by Willis Eschenbach As a result of a tweet by Steve McIntyre, I was made aware of an interesting dataset. This is a look by Vinther et al. at the last ~12,000 years of temperatures on the Greenland ice cap. The dataset is available here. Figure 1 shows the full length of the data,…

Going To Zero

Guest Post by Willis Eschenbach [See update at the end] I keep reading about all kinds of crazy schemes to reduce US CO2 emissions. Now, I don’t think that CO2 is the secret knob that controls the climate. I think that the earth has a host of emergent thermoregulatory mechanisms that act to keep the…

Cooling Down The Land

Guest Post by Willis Eschenbach [UPDATE] I’ve discovered an error in the calculations that invalidates most of this post, with the exception of the snow extent data. See the explanation here.] As I mentioned in a recent post, the CERES satellite folks have released another year’s worth of data. Since this should have gotten us…