Landfalling hurricane [credit: NOAA]
A reconstructed record of cyclone activity going as far back as 1850 doesn't show what climate alarmists, with their assertions of 'human-induced' global warming, might have expected. The intensity question is left for future research. The researchers note that 'For most tropical cyclone basins (regions where they occur more regularly), including Australia, the decline has accelerated since the 1950s. Importantly, this is when human-induced warming also accelerated.' [Or so they believe.] 'The only exception to the trend is the North Atlantic basin'. Of course detailed historical records of natural climate variation may also be hard to find.
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The annual number of tropical cyclones forming globally decreased by about 13% during the 20th century compared to the 19th, according to research published today in Nature Climate Change.
Tropical cyclones are massive low-pressure systems that form in tropical waters when the underlying environmental conditions are right, says The Conversation.
These conditions include (but aren't limited to) sea surface temperature, and variables such as vertical wind shear, which refers to changes in wind speed and direction with altitude.
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