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Shy4chey
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I agree it creates a bias. But you can't really say they're purposely naming more storms to skew results, when measurements changed. They're naming more storms because of the measurement changes, not to skew data.
And with both the Fujita scalre and wind chill scale there are documented changes. I'm not saying it's right, but you can go back and see that the definitions and criterium were changed. |
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Aerology
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Registered: 5/28/2008
Location: North Central Kansas
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Tornado number reporting....
Prior to 1950 the only reporting of tornadoes was done when some one was injured / killed or damage was extensive enough to make the local newspaper.
In early 1950's the Local police and Highway patrol officers were asked to add their reports to the mix.
when the Doppler radar systems came on line lots more reports were generated, from radar sightings alone, no visual confirmation, and the storm spotter program generated lots more.
This total increase in reporting has swelled the number as compared to past records. I do not think they are really any more or less common than they were in reality before.
The same is true of earthquake numbers, as new and more sensitive equipment comes on line, and now that international computer links can confirm world wide events in seconds, the data base has swollen exponentially.
In the case with Hurricanes, weather satellites have shown the occurrence of events in the middle of oceans, that is out of normal shipping lanes, and had been totally missed in the past, or the only witnesses were lost at sea.
Given a better ability to access wind speeds, it is easier to see the three hour long peaking of wind speed, to above a level that justifies a name, where before nobody knew....
The media and bored forecasters on "the Weather channel" looking for something different to say, for the next three hours of their shift, might have something to do with your perceptions. |
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posted on 6/6/2008 at 13:06
