by K. Richard, Mar 11, 2024 in NoTricksZone
CO2-induced global warming was supposed to intensify the hydrological cycle and extreme precipitation. It hasn’t.
New research (Mitchell and Knapp, 2024) at a southeastern United States study site indicates there has been no significant trend in either total precipitation or intense rainfall events (IRE) over the last 250 years (1770-2020).
However, there was more IRE precipitation from 1936-1959 than from 1960-2020. In fact, the most recent 60 years has the lowest record of extreme precipitation during the study, with averages of 81.20 mm for 1770–1935, 230.45 mm for 1936–1959, but just 168.27 mm during 1960–2020.
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by Anthony Watts, September 4, 2018 in WUWT
From the University of Bristol and the “models before measurements” department comes this highly speculative claim that is entirely based entirely on climate models. There’s no actual measured data from any sort of paleo research. It’s science, but not as we know it.
A new study by scientists at the University of Bristol has shown that ancient global warming was associated with intense rainfall events that had a profound impact on the land and coastal seas.
The Palaeocene-Eocene Thermal Maximum (PETM), which occurred about 56 Million years ago, is of great interest to climate scientists because it represents a relatively rapid global warming event, with some similarities to the human-induced warming of today.
Although there have been many investigations of how much the Earth warmed at the PETM, there have been relatively few studies of how that changed the hydrological cycle.
by Glenn A. Hodgkins et al., September 2017 in Journal of Hydrology
Trends in major-floods from 1204 sites in North America and Europe are assessed.
Trends based on counting exceedances of flood thresholds for groups of gauges.
The number of significant trends was about the number expected due to chance alone.
Changes in the frequency of major floods are dominated by multidecadal variability.
See also here
La géologie, une science plus que passionnante … et diverse
