These articles present a unique radical analysis of the global warming social phenomenon and environmental, health and safety issues. Denis G Rancourt is a former professor of physics (University of Ottawa) and an environmental science researcher. His scientific research has been concentrated in the areas of spectroscopic and diffraction measurement methods, magnetism, reactive environmental nanoparticles, aquatic sediments and nutrients, and boreal forest lakes.
Thursday, April 7, 2016
There are no increased dry and wet episodes from industrial CO2
Hello warmist enthusiasts. This new article is of note. Hard science
published in the top journal shows that there is no increased
high-intensity weather events periods or regional climate changes
associated with industrial-era CO2. That little hypothesis based on
creative toy models does not hold up to the actual data.
Abstract: "Accurate
modelling and prediction of the local to continental-scale hydroclimate
response to global warming is essential given the strong impact of
hydroclimate on ecosystem functioning, crop yields, water resources, and
economic security. However, uncertainty in hydroclimate projections remains large,
in part due to the short length of instrumental measurements available
with which to assess climate models. Here we present a spatial
reconstruction of hydroclimate variability over the past twelve
centuries across the Northern Hemisphere derived from a network of 196
at least millennium-long proxy records. We use this reconstruction to
place recent hydrological changes and future precipitation scenarios
in a long-term context of spatially resolved and temporally persistent
hydroclimate patterns. We find a larger percentage of land area with
relatively wetter conditions in the ninth to eleventh and the twentieth
centuries, whereas drier conditions are more widespread between the
twelfth and nineteenth centuries. Our reconstruction reveals that
prominent seesaw patterns of alternating moisture regimes observed in
instrumental data
across the Mediterranean, western USA, and China have operated
consistently over the past twelve centuries. Using an updated
compilation of 128 temperature proxy records,
we assess the relationship between the reconstructed centennial-scale
Northern Hemisphere hydroclimate and temperature variability. Even
though dry and wet conditions occurred over extensive areas under both
warm and cold climate regimes, a statistically significant
co-variability of hydroclimate and temperature is evident for particular
regions. We compare the reconstructed hydroclimate anomalies with
coupled atmosphere–ocean general circulation model simulations and find
reasonable agreement during pre-industrial times. However, the
intensification of the twentieth-century-mean hydroclimate anomalies in
the simulations, as compared to previous centuries, is not supported by
our new multi-proxy reconstruction. This finding suggests that much work
remains before we can model hydroclimate variability accurately, and
highlights the importance of using palaeoclimate data to place recent
and predicted hydroclimate changes in a millennium-long context."
No comments:
Post a Comment