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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Koalas extinct? Hardly. “Nearly everything you have read or heard about koalas is wrong”

Since Europeans arrived Koalas have been booming and busting

The calls were out this week saying that koalas will be extinct in New South Wales in 30 years. But they didn’t mention that Koalas thrive and multiply so fast that in the right conditions scientists talk of ‘plagues’. On Kangaroo Island last year, there were so many koalas, the South Australian government has been trying to sterilize or relocate thousands of them over the last twenty years. Periodically scientists even discuss whether we have to cull them (the horror!).

They’ve survived twenty megafires in 200 years. They can recover. Ponder that Koalas were only introduced to Kangaroo Island in the 1930′s but by the 1990′s there were 14,000 of them and even though they are considered a tourism asset they are also considered a problem and pest too.

“Nearly everything you have read or heard about koalas, is wrong” — Vic Jurskis

Koalas favorite snack | Photo by pen_ash

Vic Jurskis is a veteran forester and fire expert who studied them for years. He’s written The Great Koala Scam, Green propaganda, junk science government waste and cruelty.

Jurskis estimates that thanks to European settlers there are more [...]

Save the world and raze some forests

Look out, another knot of tortured researchers just went past. All this time we’ve been pouring money into planting trees and stealing land from farmers because we were sure that trees would cool the world. (Just like solar panels do, yeah?) But life is so complicated — for years now some researchers have been quietly wondering if more trees were actually going to warm the planet instead, but they didn’t want to say much. It turns out that while trees absorb the sacred CO2 (that’s cooling!) they also emit methane (that’s warming!), and terpenes (cooling) and isoprene (warming and cooling!) If that’s not complicated enough, then there is the albedo effect. Trees are dark, they absorb more sunlight than bare ground and snow. So depending on where they are planted, that makes for “warming”. Then some VOCs or volatile organic compounds also seed clouds.

So what’s the net effect? Who knows, it’s not like there are whole industries dependent on it…

Now they ask?

How much can forests fight climate change? Trees are supposed to slow global warming, but growing evidence suggests they might not always be climate saviours. Gabrielle Popkin, Nature

As usual, the debate is based [...]

Record hottest year means record bumper wheat crop, opposite of crop models

Last year there were warnings from crop modelers in Nature that heat kills wheat and yields were going to fall in the “near future”, if temperatures rose. In fact global warming was “already slowing wheat gains”. What followed was a record El Nino, and 2015 was the hottest ever year, with 2016 vying to beat it. But instead of wheat doom, this month the USDA forecasts a record yield of wheat with bumper crops globally. Wheat output has grown in Australia, the US, Russia, Ukraine, everywhere pretty much, except the EU where it has been too rainy. Where are the mea culpas? h/t to the GWPF

Jan 2015, published in Nature. “Global Wheat Yield May Drop as Temperatures Rise”

“… researchers are now letting farmers know that the world’s wheat yields are excepted decline in the near future, with the world standing to lose six percent of its wheat crop for every degree Celsius that the annual global temperature increases.

“The simulations with the multi-crop models showed that warming is already slowing yield gains, despite observed yield increases in the past, at a majority of wheat-growing locations across the globe,” researcher Senthold Asseng, at the University [...]

Peak Wheat! One quarter of wheat production will be lost to extreme climate (or maybe Not)

According to a new study released by Nature Climate Change we are, remarkably, at the very peak of conditions for wheat growth worldwide — and it’s all downhill from here. (What are the odds?) The last 15 years, which have been the “hottest on record” and saw massive human CO2 output, were the peak time for wheat. But all that is about to fall off a cliff if we do … more of the same.

To demonstrate that millions will starve: take projections of extremes from broken climate models, and put them in wheat crop models, and then assume we take no adaptive measures for the first time in human history. Ignore that even the IPCC doesn’t think extreme events are necessarily changing: “Climate models are unable to predict extreme events because they lack spatial and temporal resolution. In addition, there is no clear evidence that sustained or worldwide changes in extreme events have occurred in the past few decades. “

There’s been no increase in drought globally in the last 60 years either. Pouring free fertilizer into the sky, along with better agricultural practices, has produced a global boom in crops (See CO2science for scores of studies on biomass [...]

CO2 emissions in last 50 years made us $3.5 Trillion wealthier

Millions of people are alive today because the net emissions of carbon dioxide have increased. These extra emissions have provided essential fertilization for crops around the world. Craig Idso has released a new report calculating that the extra value that the rise in CO2 has produced from 1961 – 2011 is equivalent to $3.5 trillion dollars cumulatively. Currently the extra CO2 is worth $160 billion dollars annually. Big-biccies. Projecting forwards, increasing CO2 levels could be worth an extra $9.8 trillion on crop production between now and 2050. Virtually every economic analysis to date does not include the agricultural gains. There are also benefits in health, as warmer winters reduce mortality by more than hotter summers increase deaths. The real economic question then, is “Can we afford to slow CO2 emissions at all?”

While there are negative externalities projected by some climate modelers, their models are unvalidated, proven wrong, and based on unsupported assumptions about clouds and humidity. Compare that to the agricultural gains, which are not just demonstrated in laboratory greenhouses, but confirmed in the field, and with global satellite estimates of increased biomass.

Obviously, the only sensible thing to do at this point is continue our emissions of [...]