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Oud 21 april 2019, 10:49   #288
parcifal
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Ha, dit is beter. En het is niet van Skeptical Science

https://www.sciencedaily.com/release...0730092544.htm



Citaat:
Frequency Of Atlantic Hurricanes Doubled Over Last Century, Climate Change Suspected

Date:
August 1, 2007
Source:
National Center for Atmospheric Research

Summary:
About twice as many Atlantic hurricanes form each year on average than a century ago, according to a new statistical analysis. The study concludes that warmer sea surface temperatures and altered wind patterns associated with global climate change are fueling much of the increase.
Citaat:
A new climate study indicates that hurricanes and tropical storms became more frequent in the Atlantic Ocean during three distinct periods over the last century, as shown in this graphic. The first part of the 20th century (in white) was relatively quiet, with an annual average of 6 observed hurricanes and tropical storms. The annual average increased to 10 after 1930, and then reached 15 from 1995 to 2005 (in darkest shading). This graphic shows both the total number each year (blue line) and the nine-year running average, calculated from four years back through four years ahead of a given year. Called a running mean, this method smoothes out year-to-year variability to reveal the long-term trend. The new research associates the increasing storms with rising sea-surface temperatures.
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