Topics:
Claim:
Doubling the concentration of atmospheric CO2 from its pre-industrial level, in the absence of other forcings and feedbacks, would likely cause a warming of ~0.3°C to 1.1°C
“Dr. Happer’s assertion that models show 2x to 3x greater warming than observations is incorrect. At the surface (where we all live) models predict a rate of warming of 0.2 °C per decade since 1970, while NASA observes warming of around 0.18 °C during the same period.”
Claim:
The temperature is not rising nearly as fast as the alarmist computer models predicted. You know, it’s much, much less, factors of 2 or 3 less.
Claim:
there's this myth that's developed around carbon dioxide that it's a pollutant […] Carbon dioxide is a perfectly natural gas, it’s just like water vapor, it’s something that plants love.
Declining Arctic sea ice cover and thawing permafrost are both complex feedbacks that amplify global warming: The loss of reflective sea ice means more sunlight absorbed by the dark Arctic Ocean, while thawing permafrost can release greenhouse gases to the atmosphere.
“The article is accurate and highlights the challenges that California’s water resource managers are facing due to climate change. There are some issues with differentiating natural climate variability and forced climate change but the main points are correct.”
Only four witnesses were invited to testify before the committee, which cannot be representative of all the expertise required to understand a field as vast as climate science. So we have asked for additional scientists to weigh in on some noteworthy, scientifically verifiable statements made during the hearing to provide a broader and more representative view of the state of scientific knowledge.
“The information in this story is generally correct—the frequency and severity of flooding is accelerating due to sea level rise, and the quoted scientists from NOAA and FAU are credible experts in this field.”
“The article clearly and concisely documents some of 2016’s climate extremes and puts them in the context of the warming trend.”
While natural temperature fluctuations (due to El Niño, for example) have always occurred, they are now superimposed on a warmer background due to human-induced global warming. That causes mass coral bleaching to happen more frequently.