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Sport Pilot

Harold Brooks wrote:
In article . com,
says...

Scott wrote:

It was my understanding that the study used satellite
data. How many weather satellites were flying the 1950s?

Scott

I double checked, the word satellite does not appear in the document.
I see no reason to leave out prior data. You could make a case that
storms might not be detected before satellites, but I think the issue
would be huricane hunter aircraft which I believe began in the 50's.

You didn't read it carefully:

"Cyclone intensities around the world are estimated by pattern
recognition of satellite features based on the Dvorak scheme (25). The
exceptions are the North Atlantic, where there has been continuous
aircraft reconnaissance; the eastern North Pacific, which has occasional
aircraft reconnaissance; and the western North Pacific, which had
aircraft reconnaissance up to the mid-1980s. There have been substantial
changes in the manner in which the Dvorak technique has been applied
(26). These changes may lead to a trend toward more intense cyclones,
but in terms of central pressure (27) and not in terms of maximum winds
that are used here. Furthermore, the consistent trends in the North
Atlantic and eastern North Pacific, where the Dvorak scheme has been
calibrated against aircraft penetrations, give credence to the trends
noted here as being independent of the observational and analysis
techniques used. In addition, in the Southern Hemisphere and the North
Indian Ocean basins, where only satellite data have been used to
determine intensity throughout the data period, the same trends are
apparent as in the Northern Hemisphere regions."

Webster, P. J., G. J. Holland, J. A. Curry, and H.-R. Chang, 2005:
Changes in Tropical Cyclone Number, Duration, and Intensity in a Warming
Environment. Science, Vol 309, Issue 5742, 1844-1846 , 16 September
2005 [DOI: 10.1126/science.1116448]

Harold
--
Harold Brooks
hebrooks87 hotmail.com

H'mm, that doesn't appear in the article, perhaps the study itself, if
so please provide a link.