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Old 25-03-2011, 08:32   #1
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Study Finds Wind Speeds Increasing - (ABC)

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Study finds wind speeds on the rise News in Science (ABC Science)

Wind speeds and wave heights over the world's oceans have been steadily increasing for the last quarter of a century, a new long-term study shows. The researchers at Swinburne University of Technology in Melbourne say the trend could also have an effect on the transfer of energy between the sea and the atmosphere - one of the great unknowns in climate change calculations.
The study, published today in Science Express online, uses 23 years of satellite altimeter data taken from 1985 to 2008 to show that wind speeds over the oceans have been steadily increasing.
The areas which show increased wind speeds in the study also show increased wave heights.
Professor Ian Young, the lead author on the paper, says the study shows that the largest increases are happening in extreme conditions.
"Extreme wind speeds have increased over most of the globe by approximately 10 per cent over the last 20 years, or 0.5 per cent every year," he says.
"Extreme wave heights have increased by an average of seven per cent over the last 20 years."
"Off the southern coast of Australia, the highest one percent of waves has increased in height from approximately five meters to almost six meters."
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Old 25-03-2011, 09:26   #2
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Re: Study finds wind speeds increasing - (ABC)

hurricane activity runs in 30 to 40 year cycles. Notice that in the study the averages are skewed by extreme winds which are mostly found in intense storms. That would be expected. So really, this is no likely surprise. Kind of like saying; wow, there's a lot of rain during monsoon season.
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Old 25-03-2011, 09:32   #3
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Re: Study finds wind speeds increasing - (ABC)

I've heard that strong storms have been getting stronger, but this article confirms that average conditions are still average. Sad. Could have used more wind around here.
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Old 25-03-2011, 12:44   #4
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Re: Study finds wind speeds increasing - (ABC)

Three reefs it is, then.
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Old 29-03-2011, 05:24   #5
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Re: Study finds wind speeds increasing - (ABC)

well iv'e heard of 50 year storms,
we had a blow up the derwent that knocked over all the jetty and washed way all the beaches half way up to hobart, the waves were so big that you could have used the qe2 as a surf board, that was 49 years ago.
if you live down this way, best check your mooring line tomorrow.
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Old 29-03-2011, 05:31   #6
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Re: Study finds wind speeds increasing - (ABC)

We can always use more wind! More sailing!!!
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Old 29-03-2011, 06:04   #7
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Re: Study finds wind speeds increasing - (ABC)

Also more free electricity from the wind generators.
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Old 29-03-2011, 06:09   #8
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Re: Study finds wind speeds increasing - (ABC)

Quote:
Originally Posted by gettinthere View Post
hurricane activity runs in 30 to 40 year cycles. Notice that in the study the averages are skewed by extreme winds which are mostly found in intense storms. That would be expected. So really, this is no likely surprise. Kind of like saying; wow, there's a lot of rain during monsoon season.
Looks like you need to pay for the full artical, but in the abc artical is says that there was a greater rise in higher latitudes, presumably away from TRS activity? It always states that "Extreme wind speeds have increased over most of the globe by approximately 10 per cent over the last 20 years, or 0.5 per cent every year," - not just in north atlantic hurricane zone so maybe it's not a simple as hurricane cyles. Which aren't that simple themselves.

polyscience.org The intricate hurricane cycle
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Old 29-03-2011, 06:16   #9
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Re: Study finds wind speeds increasing - (ABC)

Solar wind has increased during the same time period, so it makes sense that earths also increased.
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Old 29-03-2011, 07:56   #10
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Re: Study finds wind speeds increasing - (ABC)

I have it on good authority that wind makes the boat go, and that more wind makes the heavier steel sailing barges like what I have finally sail properly. So all that whistling and backstay scratching is paying off, I guess.
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Old 29-03-2011, 14:08   #11
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Re: Study finds wind speeds increasing - (ABC)

How they measure it.

http://www.sciencemag.org/content/su.../Young.SOM.pdf
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Old 29-03-2011, 14:25   #12
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Re: Study finds wind speeds increasing - (ABC)

where sailors are involved, it seems that wind speeds are always embellished.

(and the 22 knots apparent that were sailed on Saturday becomes 25 knots true by the time Monday rolls around.)
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