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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Hottest Shattering Year since the last one: Five reasons it was not hot, and not relevant

Tell the world, 2015 is the hottest year since 2010.

The fuss made over contested decimal points in highly adjusted datasets of irrelevant factors only shows how unscientific the public debate is. It probably wasn’t the hottest year in the last 150, and even it was, who cares – that doesn’t tell us anything about the cause. (Remember when cause and effect used to matter to a scientist?) Natural forces like the Sun and clouds can cause hot years too. Even if it was “the hottest” in a short noisy segment, the world has been hotter before (and life on Earth thrived) and the climate models are still hopelessly wrong. If CO2 was a big driver of the climate, 2015 should have been a lot hotter.

1. It wasn’t the hottest year. Satellites have better, broader coverage, surveying almost the whole planet (rather than selected car parks, runways, etc. like the surface thermometers). The satellites say that both 1998 and 2010 were hotter. In any case, these kind of piddling noisy differences are just street signs on the road to nowhere — what matters are the long term trends, and the predictions of climate models. (If the models worked, [...]

Hottest July in 4000 years? Not even the hottest July since *2014* according to satellites

NOAA has a press release out being picked up around the world. For example, the DailyMail, UK, is saying July was the hottest month since records began in 1880 as heatwaves swept the Earth’s countries and oceans. Other silly tabloids have headlines about this being the hottest July in 4,000 years, as if we have even the remotest idea what the average July global temperature was in the days of Plato.

Better data shows July this year is the hottest since way back in… 2014. It’s not 4,000 years, not 135 years, it’s the hottest July since the last one. We only have 30 years of good climate data: the satellites tell us the pause is real, and last month’s summer temperatures is not a record anything. According to the UAH and RSS global satellites, lower troposphere averages for July 2014 were 0.30C and 0.34C, compared to July 2015 of 0.28C. Even, June 2015 was hotter (UAH, 0.35C; RSS, 0.39C). July 2015 is not even the hottest month since June.

But some journalists will believe anything. Anthony Sharman, sports journalist, News.com, Australia, thinks we know the global temperature of the July that Jesus was born. Who’s a gullible journalist then? [...]

Charles Sturt’s time: so hot that thermometers exploded. Was Australia’s hottest day in 1828? 53.9C!

Australia’s hottest day? Not 2010, but 1828 at a blistering 53.9 °C

Back before man-made climate change was frying Australia, when CO2 was around 300ppm, the continent savoured an ideal preindustrial climate, right? (This is the kind of climate we are spending $10bn per annum to get back too?)

We are told today’s climate has more records and more extremes than times gone by, but the few records we have from the early 1800’s are eye-popping. Things were not just hotter, but so wildly hot it burst thermometers. The earliest temperature records we have show that Australia was a land of shocking heatwaves and droughts, except for when it was bitterly cold or raging in flood.

In other words, nothing has changed, except possibly things might not be quite so hot now.

Silliggy (Lance Pidgeon) has been researching records from early explorers and from newspapers. What he has uncovered is fascinating. — Jo

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Charles Sturt (1930 postage stamp) Wikimedia

Lance Pidgeon writes:

“EXTENSIVE FLOOD”, “AWFUL BUSH FIRES”, “PROLONGED DROUGHT“ AND “CHANGES OF CLIMATE“.

These Australian headlines from the 1800′s above describe extremes the early colonists faced. At the time the European explorers who were instructed [...]

Has North Victoria cooled, and is that the ghost of a solar cycle signal we see?

UPDATED AGAIN #4 — Now with Vukcevics Hale cycle graph of Echuca. and #3 David Archibalds suggestion of the Hale Cycle at work. #2 with Willis Eschenbach’s graph and my thoughts, (see below)

Ian Bryce sent me a striking graph (or two). Looking at the original raw data from Echuca Victoria shows a dramatic cooling trend of nearly half a degree since 1900, and rather than being a siting anomaly, it’s repeated in two towns about 100km away.

Curiously he also finds peaks in the maximums at Echuca that look for all the world like they match the solar cycle. Is it a fluke, or could it be real? If it’s real, what conditions make the solar sun-spot cycle so apparent in Echuca — where its maximum temperatures seemingly peak with each second solar cycle. Can anyone find this signal in other places? — Jo

 

The area is inland Northern Victoria

Has there been Global Warming or Global Cooling in Echuca

Guest post: Ian Bryce

I have spent about 37 years working with processing tomatoes in the Goulburn Valley in Australia, and the last 25 years or so, with research into growing and processing canning tomatoes. Since 1984, [...]

Threat of ANAO Audit means Australia’s BOM throws out temperature set, starts again, gets same results

Joanne Nova and Ken Stewart

A team of independent auditors, bloggers and scientists went through the the BOM “High Quality” (HQ) dataset and found significant errors, omissions and inexplicable adjustments. The team and Senator Cory Bernardi put in a Parliamentary request to get our Australian National Audit Office to reassess the BOM records. In response, the BOM, clearly afraid of getting audited, and still not providing all the data, code and explanations that were needed, decided to toss out the old so called High Quality (HQ) record, and start again. The old HQ increased the trends by 40% nationally, and 70% in the cities.

So goodbye “HQ”, hello “ACORN”. End result? Much the same.

That meant the ANAO could avoid an audit, since the BOM had changed data-sets, the point of auditing the old set was moot.

For me, this version is so much worse than the previous one. In the HQ data set the errors could have been inadvertent, but now we’ve pointed out the flaws, there can be no excuses for getting it wrong. Instead of fixing the flaws (and thanking the volunteers), it’s almost as if they’ve gone out of their way [...]

Has CO2 warmed the planet at all in the last 50 years? It’s harder to tell than you think.

Joint Post: Jo Nova and Tony Cox

Even most skeptics agree that the world has been warming during the last 50 years, but there is apparently no significant underlying warming trend in 46 out of 47 years of data. Something decidedly unusual happened to the world in 1977 and we don’t know for sure what it was. The world got warmer, and the change “stuck”. But there were no extra emissions of CO2 in that year, so there is no reason to pin this to CO2.

It’s difficult to believe we are not sure – but the last 50 years of warming trend depends on that single stepwise leap in 1977. Look at the graph below. Does it show one strong underlying warming trend, or is it really a trend so insignificant that it wouldn’t exist if there was not a step change that artificially bolstered it?

A series of two flat lines can appear to be a continuous warming trend if a linear trend line is fitted because it ignores the step change. McKitrick and Voselgang

This step effect was first noted by David Stockwell in 2009

The continuous warming appears to be obvious in the records of [...]