Archive for the ‘pressure’ Category

High pressure over the UK

This is happening at the time of the deepest solar minimum for over a century. A Met Office tweet shown in the article states the record was set in January 1902: ‘UK record of 1053.6 hPa, Aberdeen 31.1.1902’.

Wikipedia says: ‘solar cycle [14] lasted 11.5 years, beginning in January 1902 and ending in July 1913. The maximum smoothed sunspot number (SIDC formula) observed during the solar cycle was 107.1, in February 1906 (the lowest since the Dalton Minimum)’.

The obvious similarity between January 1902 and January 2020, and indeed between solar cycles 14 and 24, could be a coincidence – but is it?
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The weather forecasters have just given us an impressive display of their skill by predicting the scale of the current high pressure zone over the UK, says BBC News.

Overnight, Sunday into Monday, London’s Heathrow Airport recorded a barometric pressure of 1,049.6 millibars (mbar).

It’s very likely the highest pressure ever recorded in London, with records dating back to 1692.

But the UK Met Office and the European Centre for Medium Range Forecasts had seen it coming well ahead of time.


Trump turns the screws on Nordstream 2.

Posted: December 22, 2019 by tallbloke in Defence, Energy, News, Politics, pressure has this

US sanctions targeting the Nord Stream 2 gas pipeline between Russia and Germany became law on Friday evening after President Donald Trump signed off on a massive defense bill.

The sanctions target companies involved in constructing the $11 billion (€9.93 billion) energy project, which will transport Russian gas under the Baltic Sea and deliver it directly to Germany.

The bill describes Nord Stream 2 as a “tool of coercion and political leverage” that Moscow could use against Berlin — and says it risks significantly weakening US ties to Germany and other European allies.

US lawmakers in both houses of Congress overwhelmingly approved the sanctions.


Ned and Karl often run into people on twitter who tell them that their ‘theory’ violates the 1st Law of thermodynamics. Firstly, as Ned points out, their empirical work is not a theory, but a discovery. But let’s allow Paul to develop his argument, and then we’ll pick it apart and see if it ‘holds water’.

Paul Alter@PAlterBoy1 writes: I wrote this up with the help of a physicist and a climate scientist. You have a gas in a cylinder with a piston. Kinetic energy is applied to the piston. The piston adds energy to the gas through its work: the work by a force is the force times the distance the force (work).

2/ point is moved into the direction of the force. The piston exerts a force on the gas and when it moves to compress the gas it “works” and hence adds energy. The energy that the moving piston adds to the gas is converted into heat, to the effect that total energy is conserved.