On 30/07/2019 14:56, JGD wrote:
On 30/07/2019 10:34, Spike wrote:

As the article says: "...understanding global temperature trends
requires a long-term perspective", and viewing the NASA reference in
terms of the geologic temperature record might provide a better base for
comparisons.

You've managed to put your finger on a key point. Concern about climate
change is about what happens on human timescales, not geological
timescales. Most children born today - at least in Western countries -
are likely to be alive in 2100 and beyond. So the state of the earth in
2100 and for their children out to 2200 is what's vitally important -
food to eat, water to drink and dry land significantly above current sea
level to live.

The difference between human and geological timescales is, let's say, a
million times - it's the same ratio as between 20 seconds and a
lifetime. Will the earth survive? Yes, of course, as it has for the past
4B years. For a significant % of humanity, including your family, the
answer is much less clear. The urgency is about stopping what is
happening in the next 100-200 years, not in 50,000 or one million or 50
million years. Think human timescales!

The problem you have with the 100-200 years time-scales is that if you
applied it to the LIA, one would swing between squandering a nation's
resources battling warming, or battling cooling, depending on where in
the LIA you chose as a datum.

This is nicely illustrated by BBCTV's lunchtime news today, in their
compulsory Climate Change propaganda slot. Apparently, the ten 'hottest'
years have all occurred since 2000, but the coldest three were just
after 1900. This is, of course, following the end of the LIA at about
that time, and it's little wonder that things have 'warmed' since then.
It's what one would expect. Unfortunately the climate change industry's
climate models are no help here. as they have failed to model anything,
and are a mere illustration of how little we know about the issue
currently called 'climate change'.

And thrown in to the 'news' for good measure, the UK's climate is more
variable because we are an island nation! There was I believing all
these years that our climate was less variable because we are an island!

--
Spike