Sorry to ruin the fun, but an ice age cometh [SEC=UNCLASSIFIED] - austpacwx

Message from discussion Sorry to ruin the fun, but an ice age cometh [SEC=UNCLASSIFIED]

Blair Trewin

More options May 5, 10:40 pm

From: "Blair Trewin" <B.Tre...@bom.gov.au>

Date: Mon, 5 May 2008 22:40:43 +1000

Local: Mon, May 5 2008 10:40 pm

Subject: RE: [austpacwx] Re: Sorry to ruin the fun, but an ice age cometh [SEC=UNCLASSIFIED]

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The 17th and 18th centuries were certainly significantly colder in northern Europe than the first half of the 20th (although the limited evidence available suggests this wasn't matched in the Southern Hemisphere). However, I wouldn't read anything into freezing of the Thames - the main reason it doesn't freeze now is because of warm water flowing into it from the drains of urban London (bridge configurations have also been important). It would certainly have frozen in 1962-63 - the coldest winter since 1740 - under 18th-century urban conditions, and probably in a number of subsequent winters too (like 1987).

I could document all the fallacies, factual flaws and misleading extrapolations in the Chapman article, but I've got better things to do with a couple of hours, and in any case David Karoly's already done it at www.onlineopinion.com.au.

Blair

-----Original Message-----
From: austpacwx@googlegroups.com on behalf of Dennis Cottle
Sent: Mon 05/05/2008 20:29
To: austpacwx@googlegroups.com
Subject: [austpacwx] Re: Sorry to ruin the fun, but an ice age cometh

Correct Tony
The "Maunder Minimum " is well recorded with total freeze up of the Thames
river ect. .I think there is a famous painting of people skating on the
Thames by an artist I should remember but cant.
Dennis Cottle
----- Original Message -----
From: "Tony Langdon" <vk3...@gmail.com>
To: <austpacwx@googlegroups.com>
Sent: Monday, May 05, 2008 6:33 AM
Subject: [austpacwx] Re: Sorry to ruin the fun, but an ice age cometh

> At 06:11 AM 5/5/2008, you wrote:
>>Check the forum as well.

>>Phil Chapman is a geophysicist and astronautical engineer who lives
>>in San Francisco. He was the first Australian to become a NASA astronaut

>><http://www.onlineopinion.com.au/view.asp?article=7295&page=1>http://www.onlineopinion.com.au/view.asp?article=7295&page=1

> Certainly a correlation between sunspot numbers and climate change
> has been documented, the "Maunder Minimum" and the Little Ice Age
> being a well known case. I'd suggest that this concern might be a
> little premature, but it is something interesting to keep an eye on.

> The last sunspots seen several weeks ago were lingering Cycle 23
> spots, if I recall. I do take an interest in sunspots, due to their
> effect on the ionosphere and HF radio propagation.

> 73 de VK3JED
> http://vkradio.com

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