by Vanderbilt University, from WUWT, June 20, 2017
Wet and stormy weather lashed California coast… 8,200 years ago
First high resolution evidence of California climate response to Holocene 8.2 ka event
The weather report for California 8,200 years ago was exceptionally wet and stormy.
That is the conclusion of a paleoclimate study that analyzed stalagmite records from White Moon Cave in the Santa Cruz Mountains published online Jun. 20 in Scientific Reports.
The Golden State’s 150-year stretch of unusually wet weather appears to have been marked by particularly intense winter storms and coincides with a climate anomaly in Greenland ice cores first detected in 1997. Before this “8.2 ka event” was discovered scientists thought the world’s climate had been unusually stable during the Holocene, the geological epoch that covers the last 11,700 years of Earth’s history.
by Tony Heller, June 14, 2017
The frequency of US hurricane strikes peaked below 300 PPM CO2, and have been declining as CO2 has increased.
on Fox News, in Climate Change Dispatch , June 5, 2017
Former Vice President Al Gore was forced to admit on Sunday that the UN Paris climate accord was a symbolic effort and merely “sends a very powerful signal.” Gore once again spun a series of climate falsehoods in just a few short sound bites
by JoNova (blog), May 2017
Welcome to paleolithic politics: in this version, the witchdoctors are syndicated and with lap tops.
by Dr. Ryan N. Maue, May 01, 1017
Tropical cyclone accumulated cyclone energy (ACE) has exhibited strikingly large global interannual variability during the past 40-years. In the pentad since 2006, Northern Hemisphere and global tropical cyclone ACE has decreased dramatically to the lowest levels since the late 1970s. Additionally, the frequency of tropical cyclones has reached a historical low. Here evidence is presented demonstrating that considerable variability in tropical cyclone ACE is associated with the evolution of the character of observed large-scale climate mechanisms including the El Nino Southern Oscillation and Pacific Decadal Oscillation. In contrast to record quiet North Pacific tropical cyclone activity in 2010, the North Atlantic basin remained very active by contributing almost one-third of the overall calendar year global ACE.
by Alberto Comendador, April 11, 2017
So it appears that the increase is due to improved/expanded reporting, not because there are in fact more tornadoes. This is essentially uncontroversial: NOAA gives a similar explanation on its website, though they get around the observation bias with a different method.
by Anthony Watts, April 5, 2017
From NOAA’s Geophysical Fluid Dynamics Laboratory, March 17, 2017
Two frequently asked questions on global warming and hurricanes are the following:
Have humans already caused a detectable increase in Atlantic hurricane activity or global tropical cyclone activity?
What changes in hurricane activity are expected for the late 21st century, given the pronounced global warming scenarios from current IPCC models?
R. Garibaldi et al., 2016
Journal of Atmospheric and Solar-Terrestrial Physics, 148, 48-52
As for the potential cause behind the downward trend, Rojo-Garibaldi et al. examined the possibility of a solar influence, performing a series of additional statistical analyses (spectral, wavelet and coherence wavelet transform) on the hurricane database, as well as a sunspot database obtained from the Solar Influences Data Analysis Center of the Solar Physics Department of the Royal Observatory of Belgium. Therein, their exploratory analyses revealed that “this decline is related to an increase in sunspot activity.”