On Nov 20, 1:39 pm, Kate Brown wrote:
On Nov 20, 11:00 am, Alastair wrote:
On 20 Nov, 09:40, "Alan Gardiner" wrote:

.. .

The CET value for January was -1.5C making it the 8th coldest since the
records started and the adjacent months were quite cold as well.

1708 was the year that Mount Fuji last erupted. Seehttp://en.wikipedia.org/wiki/Historic_eruptions_of_Mt.Fuji

There was a great gale around then which destroyed the Dorset Garden
Theatre in London. And I expect other things too... But it could have
been 1709/10

There is a period of negative pressure anomaly at sea level in the
North Atlantic when there is a bout of volcanic activity. OTOH there
is a lot of cyclonic stuff around when there is a period of high
seismicity in the Asian Pacific.

But then large mag quakes and volcanic activity don't really go well
together.

Negative anomalies (despite being sidetracked by modern science to fit
in with satellite collected data) are characterised by severe cold
spells as we had in April last year and high Lows and low Highs.
Storms forsake their normal course and the Azores High is displaced.

Both southerly storms and the more familiar Iceland Lows go through
the Greenland Sea into the Antarctic rather than hit Scotland or the
Norwegian continental coast.