Category Archives: Global warming

Feeling cold? Here’s some global warming links

The US National Oceanic and Atmospheric Administration reports that 2018 was the fourth warmest year since instrumental records began.

“Global temperatures in 2018 were the fourth warmest on record, US government scientists have confirmed, adding to a stretch of five years that are now collectively the hottest period since modern measurements began. The world in 2018 was 1.5F (0.83C) warmer than the average set between 1951 and 1980, said Nasa and the National Oceanic and Atmospheric Administration (Noaa). This means 2018’s average global temperatures were the fourth warmest since 1880, placing it behind 2016, 2017 and 2015.”

According to the satellite temperature record, 2018 drops a bit to being the sixth warmest on record:

“The 2018 globally averaged temperature anomaly, adjusted for the number of days in each month, is +0.23 deg. C, making 2018 the 6th warmest year in the now-40 year satellite record of global lower tropospheric temperature variations.

Dr Spencer (who is a sceptic of global warming, so has no reason to exaggerate) also produced this graph showing ranking of years in his dataset:

While the US has had some chilly polar vortex woes, January was the hottest month Australia has had since records began according to the Bureau of Meteorology:

The Bureau of Meteorology released its climate summary for January on Friday and said the widespread heatwave conditions and daily extremes were “unprecedented”.
“There’s been so many records it’s really hard to count,” said Andrew Watkins, a senior climatologist at the Bom.

And despite those extremely cold temperatures in North America, globally January was relatively warm in the satellite record:


Satellite Temps for August

The usual caveats and observations apply.


Still in a relatively low point, that’s a historical high.

As we did a bit of solar discussion a few weeks ago, a reminder that if global temperatures were all due to solar cycles then we would already be in a historically cold period. If you don’t want to trust the temperature data then ask yourself “Is the world COLDER than it has been in decades?” The honest answer, unless you have a very confused memory is “no” – at which point you need to ask why.


(UAH Satellite temp anomaly versus monthly sunspot number, both normalised to fit on same axes)


How Coal Runs Australian Politics

The latest news in Australian politics is that ex-PM Malcolm Turnbull will resign his seat sooner than expected triggering a by election. I suspect this won’t bring down the government but it’s a more assertive act by Turnbull than I expected.

The Guardian has a report here:

Further down in that article is a comment from Turnbull’s son Alex, that confirms an observation I’ve made about this chaos:

“After Turnbull’s leadership loss last week, his son Alex Turnbull has started speaking publicly about his frustrations with the federal Coalition.
On Monday, Alex said he suspected a powerful group of coal mining companies on Australia’s east coast was having an “undue level of influence” on federal Liberal party policy.
He said the Coalition’s “singular fixation” on the Galilee Basin – a gigantic coal deposit in central Queensland – and on keeping ageing coal-fired power stations alive, had led him to believe “there are other forces at work” to explain the Coalition’s unproductive policymaking.”

“That there is an undue level of influence on Liberal Party policy by a very small group of miners who have some assets they probably now regret having purchased which did not make a lot of sense anymore and are trying to engineer an outcome which makes those projects economic,” he told the ABC on Monday.
When asked who the miners were, he laughed. Then he said: “People who own a lot of coal in the Galilee Basin.”

The observation certainly fits known facts. And here is a weird twist or perhaps an example of saying the quiet part loud: Denialist website Wattsupwiththat has an article loudly complaining that the press aren’t giving ENOUGH coverage to the fact that Turnbull was ousted because of climate policy:

The Right Don’t Need To Win To Stop Climate Policy

I perhaps didn’t emphasise this enough in recent posts on Australian politics. Yes, it is complex and factional and there is a lot going on around opinion polls and personalities and feuds. You particularly can’t ignore race and racism in this mess when, as Megpie commented on my last post “instead of the current Minister for Locking Children Up In Camps, we get the Former Minister for Locking Children Up In Camps”

BUT I’m going to focus on a single issue for a moment because it is a big one. Australia is a big country with a relatively small and urban population. The majority of its elected representatives believe that climate change is real and caused by human activity and that the government should take action on climate change. Successive Prime Ministers have promised to take actions on climate change. The non-urban population of Australia is also highly vulnerable to climate change and many Australian farming communities are currently suffering from an extended drought.

BUT Australia is a country with a lot of mineral wealth and a lot of that wealth is concentrated in the hands of a small number of wealthy people. If a government tries to take action on climate change then the political right will move heaven and earth to stop it. There are lots of factors in Malcolm Turnbull’s downfall but it is notable that this specific toppling occurred directly around his attempt to pass a new energy policy – a very insipid policy watered down to extremes to get it past the right of his party but nonetheless, an energy policy.

Rudd, Gillard, Turnbull have each been successively punished by the right faction of the Australian Liberal Party, some select media outlets (two Murdoch controlled) and money from the mining industry. The conservatives in the Liberal Party just demonstrated that they’d happily trash THEIR OWN PARTY to use a kind of mutually-assured destruction tactic to hamper any moves on climate change. And that’s all they need to do – they don’t need to actually govern because ideologically they only need to wreck to achieve results for the vested fossil fuel interest.

Arguing at a Distance

My vicarious publicity team/deep cover agents in Puppydom (Chris Chupik and The Troll That Walks aka Phantom) like to keep me involved vicariously in the comment sections of Puppy blogs. I think it helps keeps up an impression that I somehow commented a lot on those blogs instead of somewhat occasionally.

Anyway, Phantom is having a bit of a tantrum about my last post on global warming:

“Its funny, actually. floppy goes to all the trouble of matching temp data to sunspot data, and notes that they match up fairly well, like Stephanie mentioned above. Shock, surprise.

But then the curves diverge around 1920, the familiar hockey stick shape. We’ve heard plenty of evidence about “adjustment” shenanigans and the relocation of NOAA thermometers to hotter locations etc. So I look at that and it fairly screams “CHECK DATA!!!”

But not floppy. He’s maintaining that all those years previously that the curves matched are over, and that since 1920-odd the CO2 in the atmosphere has completely decoupled Earth’s temperature from the solar output. The sun is getting cooler, and the Earth is getting warmer. Because magic!

Which isn’t even stupid. It’s just bare-faced lying.”

Ho hum. Yes, yes, it is usual troll stuff and refuting it just leads to a new goalpost position. Readers will recall that Phantom once declared that he would believe in global warming when I could show him cattle farms in Greenland and so I did:

But anyway back to the specific complaint. Phantom doesn’t trust that stinky NOAA data! Oh noes! OK, here’s a different data set.


This time instead of HADCRUT I used the BEST (that’s it’s name) data. The BEST temperature record was a project partly funded by the conservative (and climate denialist) Koch Brothers When the project started, the study was lauded by ‘skeptics’ because they thought it would reveal that the data was all wrong and all the warming would disappear. The founder of the project, physicist Richard Muller had publically voiced sceptcism about the data behind global warming and was seen initially as being favourable to the ‘skeptic’ cause.

That all changed when the BEST results were released. Sure, there are various quibbles and questions around how best to manage complex temperature data sets collected over very long periods of times (i.e. over generations of people) but basically the story the data was telling was correct. Muller wrote in 2011:

“When we began our study, we felt that skeptics had raised legitimate issues, and we didn’t know what we’d find. Our results turned out to be close to those published by prior groups. We think that means that those groups had truly been very careful in their work, despite their inability to convince some skeptics of that. They managed to avoid bias in their data selection, homogenization and other corrections.

Global warming is real. Perhaps our results will help cool this portion of the climate debate. How much of the warming is due to humans and what will be the likely effects? We made no independent assessment of that.”

It doesn’t matter which data set you use. There is difference in the details but the trends are the same. Solar activity has declined in recent years and temperatures have increased. If solar activity is really very closely tied to non-anthopogenic global warming (a reasonable hypothesis) then ipso-facto the current warming MUST be non-non-anthropogenic (i.e. it’s us people!).

Let’s use completely different data! Say the PMOD total solar irradiance index and the UAH Satellite temperatures. They only go back a few decades but, gosh, same pattern.


The theory that global warming in the twentieth century was due to solar activity and not greenhouse gas emissions implies/predicts that temperatures should be colder NOW. It should have already got cooler. Really, forget about the graphs and ask, does it really feel like temperatures are currently lower than they have been in years?

That’s why I call it denial. It literally is denial and no evidence, even the direct evidence of the denialists own senses will shake it.


The Sun and Global Warming

So this morning, I checked out the July satellite temperature record and made a short post about it. I then hopped into my boat (a carefully crafted replica of Lookfar) and quickly circumnavigated the Puppy seas checking on various blogs to see what was what. Coincidentally, Accordingtohoyt had a guest post on climate! Stephanie Osborn is an astronomer who write occasional science essays for Sarah Hoyt and this one was an update on solar activity entitled ‘A Solar Activity Update’ ( ) that seems sensible enough.

The premise of the post was two fold:

  • Current solar activity seems to be winding down towards some sort of minimum.
  • Past solar activity has been related to cooler periods.

Sensible enough. It ends on a rhetorical question:

“But how many correlations does it take before we need to sit up and take notice? Before we seriously start to wonder what is really going on?”

So let’s pick up where that essay leaves off. The sun and solar activity are certainly interesting as far as global warming go and certainly on longer timescales it’s an obvious factor. The Earth is warmed primarily by the Sun, so variations in the Sun should connect with variations in surface temperatures – all else being equal.

All else is not currently equal.

Those who would rather not believe that put a lot of hope in the Sun. Maybe, as the essay partly implies, recent changes in climate are not due to human activity but due to solar activity. Neat question…but also one that climatologists have been thinking about for decades. I’m not a climatologist but it isn’t hard to have a look see at some data to at least get a sense of whether more experienced scientists have somehow missed this connection.

I’m going to make use of the graphic and data set tools at the marvellous Wood For Trees website ( ) The site is clear about its sources and if readers want to do things the hard way and check original data then you can.

I’ll start with sunspot activity. This is one of the indicators the author of the essay pointed at. People have been tracking sunspot activity for hundreds of years, so there is heaps of data and the site has data back to 1750ish. Unfortunately, there’s not a good instrumental record for temperature for that long but HADCRUT4 does go back to 1850. Here’s a graph of sunspots and temperature anomaly for a hundred years 1850 to 1950. The data has been normalised for both sets so that they can be seen together on the same axes.


Interesting enough I guess. Not a slamdunk relationship just using eyeballs to judge but you wouldn’t dismiss it.

Now keep going.



The essayist is quite right about that sunspot decline but note what has been happening with temperatures? That’s not because she is wrong about solar activity being related to global temperatures but rather that the current global warming is NOT due to solar activity and worse, it is still going DESPITE reduced solar activity.

It’s not that solar activity is irrelevant to global temperatures — there is a solar signal in that data — it’s just that it can’t explain current global warming. Now I don’t know enough to know whether a sufficiently low solar minimum would put a break on the effects of anthropogenic global warming but even if it did and we used that as an excuse to do nothing about greenhouse gas emissions, the problem would still be waiting for us when the solar cycle ticked up again.

It is literally wishing on a star to think that solar activity will make global warming go away. In the meantime, I have to worry that the dry winter means my water tanks are low for the coming bushfire season which may be a month earlier this year in New South Wales were farmers are already suffering from the impact of a sustained drought.


July Temperatures

Northern Hemisphere folks won’t be surprised to hear that according to the satellite record, temperature anomalies went up a bit in a July.


UAH Global Temperature*


Being winter, this was less obvious down here and, as always, local weather conditions are not always representative of global conditions.

Temperatures have been increasing for decades but in a meandering pattern of local peaks and troughs. However, whether you watch the peaks, the means or the troughs, they’ve all been increasing. Looks like June 2018 may have been a bit of a local trough and yet still hotter than the peaks of the early 1980s.

*[The usual caveats apply. This satellit record is not neccesarily the most accurate or most appropriate summary of global temperatures but it is the one that so-called ‘skeptics’ should accept.]