Did global warming / climate change cause hurricanes Harvey and Irma?

NOAA graph showing frequency of major hurricanes (1897-2017)
NOAA graph showing frequency of major hurricanes (1897-2017)

The graph above (tweeted by famous climate scientist Bjorn Lomborg) includes Harvey and Irma.

The Daily Signal takes a look at the historical record of major hurricanes that made landfall.

Excerpt:

Flooding in homes and businesses across Houston was still on the rise when Politico ran a provocative article, titled “Harvey Is What Climate Change Looks Like.”

Politico was not alone, as another news outlet called the one-two punch of Harvey and Irma the potential “new normal.” Brad Johnson, executive director of the advocacy group Climate Hawks Vote, says Harvey and Irma are reason to finally jail officials who “reject science.”

[…]Except they’re not telling the full story.

Consider this data from a 2012 article in the Journal of Climate, authored by climatologists Roger Pielke Jr. and Jessica Weinkle. Pielke tweeted a graph from the paper that shows no trends in global tropical cyclone landfalls over the past 46 years.

Here is the graph:

Historical graph of tropical cyclone landfalls (1970-2016)
Historical graph of tropical cyclone landfalls (1970-2016)

If global warming were a thing, then you should be able to see much lower numbers on the left, and much higher on the right. But it’s basically flat.

More from the far-left United Nations IPCC:

The Intergovernmental Panel on Climate Change reported in its most recent scientific assessment that “[n]o robust trends in annual numbers of tropical storms, hurricanes, and major hurricanes … have been identified over the past 100 years in the North Atlantic basin,” and that there are “no significant observed trends in global tropical cyclone frequency.”

Further, “confidence in large-scale changes in the intensity of extreme extratropical cyclones [such as ‘Superstorm’ Sandy] since 1900 is low.”

If even the socialist United Nations admits there’s no problem, then I’m not sure why the far-left mainstream media is trying to link global warming with hurricanes.

What about floods?

Reason.com reported on a report from the National Academies of Science on the link between global warming and floods:

The 2017 Special Report further finds that trends with respect to floods in the U.S. are a mixed: They have increased in some regions and declined in others. The draft also observes that “attribution studies have not established a robust connection between increased riverine flooding and human-induced climate change.”

A new study in the Journal of Hydrology analyzing long term flooding trends in North America and Western Europe finds no discernible increase in floods in those areas during the past 80 years. A team led U.S. Geological Survey researcher Glenn Hodgkins reported, “There was no compelling evidence for consistent changes over time in major-flood occurrence during the 80 years through 2010, using a very large dataset (>1200 gauges) of diverse but minimally altered catchments in North America and Europe.” The researchers added, “For North America and Europe, the results provide a firmer foundation for the IPCC [Intergovernmental Panel on Climate Change] finding that compelling evidence for increased flooding at a global scale is lacking.”

Floods are still happening, but at the same rate as before – it’s flat.

But these observations of flat numbers of hurricanes and floods isn’t stopping the mainstream media from being hysterical.

One thought on “Did global warming / climate change cause hurricanes Harvey and Irma?”

  1. At the same time as more swamps have been drained to build cities and the footprint of the city has grown the odds of a storm hitting a city is higher.
    So the same number of storms will have a statistically higher chance of hitting a bigger target.
    Our habit for building cities in flood zones, lava zones etc are always going to get hit at some point

    Like

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