by K. Richard, Sep 17,2020 in NoTricksZone
A “potential connection” between anthropogenic global warming and the frequency or intensity of wildfires in California has yet to emerge in the trend observations.
Scientists have found a “lack of correlation between late summer/autumn wildfires” and “summer precipitation or temperature” in coastal California. In fact, “there is no long-term trend in the number of fires over coastal California” in the last 50 years (Mass and Ovens, 2019).
As CO2 concentrations have risen from 300 ppm to 400 ppm (1900 to 2007), the decline in global burned area has been significant (Yang et al., 2014)
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by A. Préat, 4 septembre 2020 in ScienceClimatEnergie
1/ Introduction
SCE a plusieurs fois rapporté que la période actuelle de réchauffement n’est pas exceptionnelle, qu’elle fait partie de cycles décennaux à pluriséculaires de refroidissement et réchauffement qui ont lieu dans des fourchettes de température fort modestes, de l’ordre de 0,15°C par 10 ans. SCE a aussi montré que le CO2 tant incriminé dans ces changements, et surtout l’actuel, n’avait pas de raison d’être, ce gaz venant après l’augmentation de température. Le ‘bouton CO2 ‘ à même d’expliquer ou de ‘justifier’ le battage médiatique quasi-quotidien est donc à ‘la remorque’ de la température et, l’hypothèse de l’effet de serre reste avant tout une hypothèse (exemple ici).
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by K. Richard, Sep 10, 2020 in NoTricksZone
Scientists continue to publish papers revealing no unusual climate trends for the last several centuries in many regions of the world.
Despite the 135 ppm increase in CO2 concentration (275 ppm to 410 ppm) since the 1700s, a new 250-year temperature (precipitation) reconstruction (Peng et al., 2020) shows there has been no net warming in Central Asia since 1766. Two other reconstructions from this region also show no warming trend in recent centuries.
Earlier this year we highlighted a new study that indicated France was up to 7°C warmer than today about 7800 years ago after cooling by 3°C in the last 200 years.
Another new study (Esper et al., 2020) suggests there has been no net warming in Spain since 1350 A.D.
The years that spanned 1474-1606 A.D. scored 7 of the 10 warmest years in the record. In contrast, there has been only 1 warmest year (1961) and 4 of the 10 coldest years since 1880.
The 2 warmest 30-year (climate) periods occurred in the decades surrounding the ~1530s and ~1820s.
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by Oldbrew, Sep 17 , 2020 in Tallbloke’s Talkshop
Solar Cycle 25 has begun, according to this NASA press release.
During a media event on Tuesday, experts from NASA and the National Oceanic and Atmospheric Administration (NOAA) discussed their analysis and predictions about the new solar cycle – and how the coming upswing in space weather will impact our lives and technology on Earth, as well as astronauts in space.
The Solar Cycle 25 Prediction Panel, an international group of experts co-sponsored by NASA and NOAA, announced that solar minimum occurred in December 2019, marking the start of a new solar cycle.
Because our Sun is so variable, it can take months after the fact to declare this event.
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by J. Curry, Sep 15, 2020 in WUWT
Subtitle: our failure to live in harmony with nature.
I’m taking a breather today from nonstop hurricane stuff. Well, ‘breather’ may not be quite the right word.
As I’m writing this, I’m looking out into the smoke from the California fires that are blowing into Reno (not to mention much of the rest of the U.S.). Schools in Reno are supposed to be open (they have a good COVID protocol), but have been closed more than half the time for the past month owing to bad air quality from the fires.
The mantra from global warming activists that manmade global warming is causing the fires, and therefore fossil fuels must be eliminated, is rather tiresome, not to mention misses the most important factors. More importantly, even if global warming is having some fractional impact on the wildfires, reducing fossil fuels would fractionally impact the fires but only a time scale of many decades hence.
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La géologie, une science plus que passionnante … et diverse
