Post by UnumClimate-related extreme weather events cost the global economy more than $2
trillion over the past decade and the U.S. was the worst-affected nation, per
a report published as leaders gather for the COP29 summit in Azerbaijan
A similar pattern over time is exhibited by contemporaneous number of
geophysical disasters – volcanoes, earthquakes, dry landslides – which,
by their nature, are not significantly influenced by climate or
anthropogenic factors. We conclude that the patterns observed are
largely attributable to progressively better reporting of natural
disaster events
Research Papers
Is the number of global natural disasters increasing?
Gianluca Alimonti & Luigi Mariani
Pages 186-202 | Received 28 Nov 2022, Accepted 18 Jul 2023, Published
online: 07 Aug 2023
ABSTRACT
We analyze temporal trends in the number of natural disasters reported
since 1900 in the Emergency Events Database (EM-DAT) from the Center for
Research on the Epidemiology of Disasters (CRED). Visual inspection
suggests three distinct phases: first, a linear upward trend to around
mid-century followed by rapid growth to the turn of the new century, and
thereafter a decreasing trend to 2022. These observations are supported
by piecewise regression analyses that identify three breakpoints (1922,
1975, 2002), with the most recent subperiod 2002–2022 characterized by a
significant decline in number of events. A similar pattern over time is
exhibited by contemporaneous number of geophysical disasters –
volcanoes, earthquakes, dry landslides – which, by their nature, are not
significantly influenced by climate or anthropogenic factors. We
conclude that the patterns observed are largely attributable to
progressively better reporting of natural disaster events, with the
EM-DAT dataset now regarded as relatively complete since ∼2000. The
above result sits in marked contradiction to earlier analyses by two UN
bodies (FAO andUNDRR), which predicts an increasing number of natural
disasters and impacts in concert with global warming. Our analyses
strongly refute this assertion as well as extrapolations published by
UNDRR based on this claim.