Re: [asa] Hurricanes and global warming

I wondered if the data would allow some statistical spins, so I tried a
simple running average for 10, 20, 30, 40, and 50 year averages. The trend
is definitely upward regardless of which of these one looks at.

The following is my 50 year average (storms, not hurricanes).

http://img504.imageshack.us/img504/4089/50yrgwavgjg6.jpg

Helio

----- Original Message -----
From: "PvM" <pvm.pandas@gmail.com>
To: "AmericanScientificAffiliation" <asa@calvin.edu>; "Janice Matchett"
<janmatch@earthlink.net>
Sent: Monday, July 30, 2007 10:59 AM
Subject: [asa] Hurricanes and global warming

> What will the global warming deniers have to say about yet another
> data point undermining their position?
>
> http://www.usatoday.com/weather/hurricane/2007-07-29-more-hurricanes_N.htm
>
> <QUOTE>
> "We're seeing a quite substantial increase in hurricanes over the last
> century, very closely related to increases in sea surface temperatures
> in the tropical Atlantic Ocean," says study author Greg Holland of the
> National Center for Atmospheric Research in Colorado.
>
> Working with hurricane researcher Peter Webster of Georgia Institute
> of Technology, Holland looked at sea records from 1855 to 2005 in a
> study published in the British journal Philosophical Transactions of
> the Royal Society A.
>
> The researchers found that average hurricane numbers jumped sharply
> during the 20th century, from 3.5 per year in the first 30 years to
> 8.4 in the earliest years of the 21st century. Over that time,
> Atlantic Ocean surface temperatures increased .65 degrees, which
> experts call a significant increase.
> </QUOTE>
>
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Received on Mon Jul 30 14:18:39 2007