JoNova

A science presenter, writer, speaker & former TV host; author of The Skeptic's Handbook (over 200,000 copies distributed & available in 15 languages).


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Anthony Watts at AGU2015 shows that hot air rises off concrete (it does affect thermometers)

Who would have thought that temperature stations near concrete are warming faster than those over grass?

Anthony Watts carefully analyzed all 1,218 surface stations in the USA and managed to find 410 good ones in the last 35 years (1979 onwards) — which is an achievement in itself. But the real point of his paper is to see if the best stations show less warming than the rest. (The good ones are the ones that are not near artificial heat sources, and haven’t been moved around). Watts finds (again) that the NOAA homogenisation practice appears to be adjusting the good stations up to the bad ones.

About a third of the US recorded warming trend in the last 35 years may have just disappeared…

Watts presents it today at the AGU 2015 conference.

Congratulations to Anthony Watts for what must have been a mammoth amount of work. The irony is that the conclusion — that hot air radiates or rises off concrete, asphalt, and from bricks affects thermometers is banal, yet so few can demonstrate it across such a big network. We have to wonder why no one else was looking… Maybe the Earth’s climate doesn’t matter that much to [...]

Global warming saves lives in Stockholm — but bad assumptions feed scary headlines

Here’s a tale of how to generate headlines from circular reasoning built on brave assumptions. All it requires are some unskeptical science journal editors and gullible journalists. Et Voila!

Congratulations to Chip Knappenberger, Pat Michaels, and Anthony Watts, whose response to Åström et al was published Wednesday.

In October 2013 Åström et al claimed that global warming had killed lots of people in Stockholm, hundreds. But the first thing you need to know is that they don’t appear to start with actual mortality data in the early 1900′s. Surprised? Me too. Anthony Watts found it hard to believe . The other thing worth knowing is that extreme heat was defined as the top 2% of hot days, and in Stockholm that mean everything above a terrifying 2-day-moving-average mean temperature of 19.6C (67 F).

From the methods:

We collected daily mortality during the period 1980-2009 and daily temperature data for the period 1900-2009 for Stockholm County, Sweden.

Åström 2013: Figure 2 j Temperature distribution of 2-day moving average of mean temperatures during summer months. Grey distribution, 1900–1929; black distribution, 1980–2009.

It appears the authors compared calculated death rates (using a model) from 1900-1929 with rates from 1980-2009 and concluded that [...]

Blockbuster: Anthony Watts skewers Muller, BEST, and the surface record all in one paper

It’s all up on Watts Up now.

What Anthony Watts and Evan Jones have revealed is breathtaking.

[Art thanks to: Cartoons by Josh]

This new pre-print paper by Anthony Watts accomplishes so much. Assuming that no major problems are found, the pieces of the jigsaw fit and pass the common sense test. Yes, hot air rises off concrete. There goes half the warming trend. The most accurate thermometers in the right places are not recording high trends. High estimates come from combining good records with poor ones then adjusting that up. They show Muller and BEST’s latest exaggerated claims of 1.5C are meaningless. They show that only class 1 and 2 stations (which are placed well, not next to concrete, car-parks, or air-conditioners) give reliable data and the warming trend from these stations is much lower than the warming trend from Class 3, 4 or 5 stations. It’s what we always knew — thermometers near artificial heat sources are measuring artificial warming, but it’s not the global kind. Mueller, BEST, GISS, Hadley and all the others should have removed the data from poor stations entirely. No amount of statistical chicanery can correct the artificial warming effect no [...]

Watts Up Speculation Thread

Watts Up Suspended

You know you’re going to speculate. The emails started coming in to me early this morning ten minutes after the unusual WUWT post was published. No — it’s not ClimateGate III, not FOIA. I have my theories.

Rereke calculates the release time for WUWT In New Zealand it will be 7.00 am.

Officially the release is listed for: “Sunday July 29th, around Noon PST in California”

Rereke notes: “Anthony Watt’s site does say PST, which would be 8.00am NZT. The question is, “Is that a typo?” I assumed that it was, because people just look at the clock. It is only people like me who are anal enough to worry.

By assuming that it should be PDT, I might be watching an hour early.”

So here are some other times (assuming it is PDT):

California: Sunday 12:00 noon New Zealand: Monday 7 am Melbourne, Sydney, Brisbane Australia : Monday 5am Perth, Australia: Monday: 3am Delhi, India: Monday 12.30am Jerusalem Israel, Helsinki Finland: Sunday 10pm Paris , France; Berlin Germany; Rome, Italy: Sunday 9pm London, UK: Sunday 8pm New York, USA: Sunday 3pm Corresponding GMT Sunday 7pm

Times thanks to Timeanddate.com

 

So [...]

Is the Western Climate Establishment Corrupt? Part I

For months now, behind the scenes, David and I have discussed just how powerful questions can be. Sometimes it’s not what you know, but what you ask that makes the most powerful point.

For his Heartland presentation last Friday, David delivered a themed compilation of example after example of the Western Climate Establishment allowing mistakes, errors or biases to accumulate — each factor on it’s own might be hard to pin down, but the sum total of actions (and inactions) forms a wholly consistent pattern.

This is Part I. These photos speak for themselves, but as far as I know, they haven’t been assembled in one web page before and David stopped waiting for me to get the time to annotate them and has helpfully used red arrows so even the less technically minded will “get” the implications.

You don’t need to have a PhD to know that the thermometers used to measure global warming are not placed well. There are at least Two Great Burning Questions here:

Burning Question 1:

NOAA is a $4 billion dollar agency. If they were determined to get the most accurate, reliable measurements possible would they leave so many sensors [...]

Another 10 of the Worst AGW papers: Part 3

Guest post by Cohenite

To natural born critics AGW is the gift that keeps giving. It would be cruel to say these papers all exhibit unworldly qualities because that is inevitable if your purpose is to generate a virtual reality with computer modeling. But, as the old saying goes, you have to be cruel to be kind; so some of these papers are speculative and unrealistic; others are eristic and the rest egregious in intent or execution. A scientific theory such as AGW is, like all human endeavours, only as good as its best examples; the following papers, all peer reviewed, represent the best of AGW. The papers are in no particular order, or lack thereof, of merit.

Part I and Part II of The Worst Papers according to Cohenite. Conversely: Ten of the best

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