Uncharted Territory

June 23, 2017

How Not to Report a Weather Record: 21st June 2017

Filed under: Effects, Global warming, Science, UK climate trends — Tim Joslin @ 5:36 pm

Well, well, well.  Less than a year on from an exceptionally hot mid-September day (at least exceptionally hot for the UK, if not, perhaps, for Kuwait), and it’s only gone and happened again.

Yeap, the presumably less poisonous than mercury red liquid in my re-purposed fridge thermometer has only gone and reached 34.5C this week, on what was widely reported as “the hottest June day for 41 years”, that is, since the summer of 1976.  And curiously I was close to the epicentre of the heatwave back in ’76, in FA Cup-winning Southampton, then the hottest place in the country, just as where I am now, a few miles from Heathrow, has been this time.

And once again the record has been somewhat understated.   I explained in my post on the topic last September that the true significance of the 13th September 2016 was that it was the hottest day that had been recorded in the UK so late in the year.

You’ve guessed it.  The 34.5C recorded at Heathrow this summer solstice was the hottest daily maximum so early in the year.  Back in 1976 the temperatures over 35C (peaking at 35.6C in Southampton on 28th) were later in the month.  In other words, 21st June 2017 saw a new “date record”.

Admittedly, it was not a particularly notable date record, since 34.4C was recorded at Waddington as early as 3rd June during the glorious post-war summer of the baby-boom year of 1947.  And 35.4C at North Heath on 26th June 1976 also seems somewhat more significant than nearly a whole degree less on 21st June.  Furthermore, unlike in 1947, 1976, and, for that matter, 1893, only one “daily record” (the hottest maximum for a particular date) was set in the 2017 June heatwave.

Nevertheless, 21st June 2017 set a new date record for 5 days (21st to 25th June, inclusive) and that is of statistical significance.  The point is that without global warming you would expect there to be approximately the same number of date records each year, or, more practically, decade.  The same is true of daily records, of course – providing a recognised statistical demonstration of global warming – but my innovation of date records provides for a more efficient analysis, since it takes account of the significance of daily records compared to those on neighbouring dates.  It makes use of more information in the data.

Supporting the “hypothesis” of warming temperatures, the 5 day date record set on 21st June 2017 exceeds what you would expect in an average year, given that daily temperature records go back over 150 years.  On average you’d expect less than 3 days of date records in any given year.  But we can’t read too much into one weather event, so how does it look for recent decades?

Last September, I provided a list of UK date records from the hottest day, 10th August, when 38.1C was recorded in Gravesend in 2003 through to October 18th, promising to do some more work next time there was a heatwave.  So, keeping my word, we have the following date records:

34.4C – 3rd June 1947 – 18(!) days

34.5C – 21st June 2017 – 5 days

35.4C – 26th June 1976 – 1 day

35.5C – 27th June 1976 – 1 day

35.6C – 28th June 1976 – 3 days

36.7C – 1st July 2015 – 33(!!) days

37.1C – 3rd August 1990 – 7 days (through 9th August)

Obviously, weighting for how exceptionally hot they were, the 2010s have had way, way over their share of exceptionally hot days for the time of year during the summer months.  I’m timed out for today, but I will definitely have to get round to an analysis of the whole year!  Watch this space.



June 12, 2017

The Brexit Logic Trap

Filed under: Brexit, Complex decisions, Economics, Markets, Politics, Reflections, Regulation — Tim Joslin @ 11:52 am

170612 Pic for Brexit post doh

“I think people will interpret membership of the single market as not respecting that referendum.” – John McDonnell

You can’t build a rocket to reach the Moon without understanding the laws of physics.  In politics, as in many other fields of human endeavour, we are most likely to succeed not through raw emotion, but when our goals are aligned with logic and a clear understanding of the real world.  Thus, political projects have for centuries been informed by the carefully crafted logical, evidence-based arguments of thinkers from Adam Smith to Karl Marx.

Somewhat more parochially, the UK will only resolve its Brexit conundrum by finding a solution that works in practice, not just in the fevered imagination of one or other political leader.

Why do I say we’re in a “Brexit conundrum”?  Surely we’ve voted for Brexit and should “just get on with it!”.  Well, no – putting the hard-line “Remoaners” to one side for the moment – it’s not quite as simple as that: the argument now is apparently over whether we have a “soft Brexit” or a “hard Brexit”.  Oh well, I hear from the gallery, we were going to have a “hard Brexit”, but Theresa has put her expensively shod foot in some seriously pungent doo-doo and now we’ll have to have a “soft Brexit”.

Yes, it seems to have turned out that a “hard Brexit” is not a politically viable option, though David Davis and Liam Fox are still in denial.  Nor is a “hard Brexit” economically viable, I might add.  Never mind, “just get on with it!!”, say the great British public: we’re more concerned about the NHS and inequality anyway.

Unfortunately, it’s still not quite as simple as that.

Why?  Because a “soft Brexit” is not a logically viable option.  If it was, Theresa May would probably have proposed it already, since, contrary to popular belief, she and her advisers are not entirely stupid.  No, it turns out that, no sooner have you pulled on one loose thread of the UK’s relationship with the EU, than you’re standing in front of the nation completely starkers, as Theresa May hinted during the election campaign.

For example, if we go “hard” and leave the European customs union, then, for starters, there’s a border problem in Ireland, not to mention with Gibraltar.  Huge bureaucratic costs arise for business, plus we revert to WTO tariffs on all our trade until we can negotiate something different.   Enough!   Let’s stay in the customs union, then, you say.  Oh, but then we wouldn’t be able to negotiate our own trade deals.  We need to do that to offset leaving the single market.  And trade is kind of important because we need to import stuff.  Like food.

OK, then, let’s stay in the single market.  Ah.  But then we’d retain free movement (I know I am on record as thinking that’s a good thing, but I’m trying to be detached and objective here).  And, incidentally, be subject to the European Free Trade Area (EFTA) court, which apparently doesn’t violate our precious sovereignty as much as the European Court of Justice (ECJ), though I’m not sure the great British public would be fully appreciative of the fine distinction.

Hmm, surely we can remain members of uncontroversial European agencies, Euratom, perhaps?  Nope, sorry, not unless we submit to the authority of the ECJ (which Labour don’t happen to feel is worth mentioning in their manifesto, I note), assuming we haven’t already done so by trying to stay in the customs union.

So the dilemma facing the nation’s glorious leadership cadre is to propose either a “hard Brexit” – which might not have got through the Commons even before the General Election and would lead to years of economic chaos and decades of underperformance – or opt for a “soft Brexit”, which would involve remaining in the single market and customs union, but also mean retaining the ECJ and free movement, and (presumably) land us with the same £50-100bn bill as hard Brexit would, as well as no influence over the single market and customs union rules nor the ability to negotiate our own trade deals.

In other words, dare I say it, if we don’t have a “hard Brexit” we may as well stay in the EU.

This is the logic trap in which we find ourselves.

This is why the Labour Manifesto, as David Davis correctly points out, pretty much paraphrases the Tory government’s Brexit White Paper.  Labour write:

“We will scrap the Conservatives’ Brexit White Paper and replace it with fresh negotiating priorities that have a strong emphasis on retaining the benefits of the Single Market and the Customs Union.”

whereas the Guardian’s commentary notes that:

“The [government’s] white paper [die!, evil capital letters, die!] reiterates that the government aims to secure ‘the freest and most frictionless trade possible in goods and services’ with the EU outside the single market and via ‘an ambitious and comprehensive free trade agreement’.

[The Tory government] also wants to be outside the customs union, so it can negotiate its own trade deals, but would like ‘a new customs agreement’, which should be theoretically possible thanks to new technology. … [No kidding, this really is their argument]

… [T]he UK will not seek to adopt an existing model used by other countries, but try to ‘take in elements’ of the single market in certain areas – in other words, bespoke deals for important business sectors. From the EU perspective, all this is ambitious: it sounds suspiciously like cherry-picking.”

Of course, Labour’s presentation during the election campaign was very different to that of the Tories, emphasising that they’d prioritise the economy over immigration, for example, but in essence both are just nuanced versions of Boris claiming he can simultaneously have his cake and shove it into his stupid gob, spraying crumbs and spittle in all directions.

Reality awaits.

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