Five years ago Al Gore convinced the World that hurricanes like Katrina were due to anthropogenic global warming, and that the worst was yet to come, and on its way.
Since Al set the standard, what has happened since Katrina is fair game for global warming skeptics.
This chart shows (click on it for a larger image) that world-wide tropical cyclone activity increased in the early 1990's, dipped for a few years then increased again in the late 1990's, fell rapidly in the early 2000's, rose for four years but not as high as in the 1990's, then fell steadily for the last four years to the lowest point in the past 33 years.
Are these fluctuations normal or anomalous?
To answer that question we need to look at a longer time period. How about since 1950, which the global warming alarmists have identified as the beginning since atmospheric CO2 according to their numbers began its steady increase then, corresponding with the rapid industrialisation after World War II.
What do you think? (again, click the chart to get a larger image)
Among many obvious conclusions that can be drawn from this chart, the most important is that for about 24 years strarting in 1970, tropical cyclone activity was very low, even as CO2 increased steadily.
Would you like to comment at this time, Mr. Gore?
Notice 1950 and 1961 had stonger activity than any of the years since.
Mr. Gore, doesn't it look like the steadily higher levels of atmospheric CO2 aren't reflected in the trend of tropical cyclone activity since 1950, and doesn't that mean that there is no evidence that increasing CO2 is causing stronger, thereby more dangerous, hurricane activity?
You showed us Katrina, and said it does.
Florida State University
(click on this link - their name - to read Florida State's
full report) is showing us sixty years of tropical cyclone activity that says it doesn't.
CO2 goes up, hurricane activity doesn't.
That's not the way you said it happens, Al.
Talk about an incovenient truth.