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Climate Science Denial Shifts to a New Tactic Among Trump Appointees

By: Jeff Masters 5:29 PM GMT on February 03, 2017

Our planet has just experienced three consecutive warmest years on record—2014, 2015, and 2016—which has made it difficult to find politicians who continue to deny the reality of global warming and climate change. However, denial of climate science has shifted to a new tactic: to claim that the indisputable heating of the planet is primarily a natural phenomenon, and that there is major uncertainty among scientists on the issue. These assertions are false. Based on the evidence, more than 97% of climate scientists have concluded that human-caused climate change is happening; scientists’ “best estimate” is that ALL of the global warming since 1950 has been human-caused, primarily through an increase in carbon dioxide due to the burning of fossil fuels. Many prominent members of the Trump administration, who all have ties to the fossil fuel industry, have been making false claims about scientists’ understanding that global warming is human-caused. For example:

 - During his hearing in January 2017 to become the new EPA administrator, Scott Pruitt claimed: “There is a diverse range of views regarding the key drivers of our changing climate among scientists.”

- Former Exxon-Mobil CEO Rex Tillerson, who is now President Trump’s Secretary of State, claimed in his confirmation hearing: “I agree with the consensus view that combustion of fossil fuels is a leading cause for increased concentrations of greenhouse gases in the atmosphere. I understand these gases to be a factor in rising temperatures, but I do not believe the scientific consensus supports their characterization as the ‘key’ factor.”

- On the February 21, 2014, edition of MSNBC’s The Daily Rundown, host Chuck Todd asked future Vice President Mike Pence if he was “convinced that climate change is man-made.” Pence responded: “I don't know that that is a resolved issue in science today.” Pence similarly stated on the May 5, 2009, edition of MSNBC’s Hardball that “I think the science is very mixed on the subject of global warming.”

- Rick Perry, Trump’s nominee for Secretary of Energy, told the Senate Energy and Natural Resources committee in January: “I believe the climate is changing. I believe some of it's naturally occurring and some of it is caused by man-made activity.”


Figure 1. Global annual temperatures up to the year 2015 (thin light red, with an 11-year moving average shown as a thick dark red line) have increased steadily, even though the total amount of energy from the sun (the annual Total Solar Irradiance, thin light blue, with an 11-year moving average shown as a thick dark blue line) has decreased slightly. Climate in past eras has seen many instances of global warming, which have been caused by an increase in heat-trapping gases like carbon dioxide or an increase in the amount of solar energy being absorbed by the Earth. Since solar energy cannot be to blame for the increase in global temperatures since 1950, scientists are confident that the steadily rising levels of heat trapping gases like carbon dioxide due to human activities is causing the observed global warming. Image credit: skepticalscience.com.

The best science says: ALL of the warming since 1950 is human-caused
Based on the evidence, more than 97% of climate scientists have concluded that human-caused climate change is happening. That’s about the same certainty with which scientists link smoking cigarettes to lung cancer. The latest 2013 Intergovernmental Panel on Climate Change (IPCC) report—the enormous consensus scientific summary of the science of climate change prepared once every six years--had this to say about the observed warming of Earth since 1950:

“The best estimate of the human-induced contribution to warming is similar to the observed warming over this period.” In other words, ALL of the observed warming after 1950 (0.6°C, 1.1°F) is due to humans. A total of 0.85°C (1.5°F) total global warming has been observed since 1880. The IPCC further quantified that human activity is extremely likely (at least 95% chance) to be responsible for more than half of Earth's temperature increase after 1950.


Figure 2. The changing view of the IPCC's assessment reports on the human contribution to climate change.

Related news and links
Climate change denial is not dead (January 31 op-ed by climate scientist Michael Mann.)

https://www.nytimes.com/2017/02/02/science/climate-change-republicans.html (February 3 article by Justin Gillis of the New York Times.)

Here’s how we know Trump’s cabinet picks are wrong on human-caused global warming (January 30 article from Dana Nuccitelli of The Guardian.)

The Trump Administration Is Filling Up With Koch Allies (December 2016 post from Ben Jervey at DeSmogBlog.)

Climate Science Legal Defense Fund (CSLDF) files brief to protect NOAA climate scientists (CSLDF post on  February 1.)

Trump’s war on EPA regulations will kill jobs and a lot of people: Clean air and water standards create jobs, spur innovation, and save lives (January 25 post by Joe Romm of ThinkProgress.)

If You Liked the Inquisition, You'll Love the House Science Committee (January 31 article from Mother Jones.)

The March for Science is set for April 22 (Earth Day) in Washington D.C.

The People's Climate Movement is happening in Washington D.C. on April 29.

Have a great weekend, everyone!

Jeff Masters

The views of the author are his/her own and do not necessarily represent the position of The Weather Company or its parent, IBM.

Reader Comments

Determined in 1963 Automobiles are the cause and to do the following;
https://en.wikipedia.org/wiki/National_Emissions_ Standards_Act 1965
By 1968 most all Vehicles Except Diesels are adapted with anti pollution devices to control pollution
https://en.wikipedia.org/wiki/Clean_Air_Act_(Unit ed_States) 1990
All Cars are Burning Unleaded Gasoline and running Catalytic Converters
Diesel Cars are running Exhaust Gas Recovery Systems (EGR)
Note: During the 90s several people Failed to commit Suicide by breathing Car Exhaust.
https://en.wikipedia.org/wiki/Global_Warming_Poll ution_Reduction_Act_of_2007
https://en.wikipedia.org/wiki/Kyoto_Protocol 2008-2012
Doha Amendment http://unfccc.int/kyoto_protocol/items/2830.php 2013
The GENx Engine; NO more a Jet engines Just Turbo Props In Short have you noticed any contrails in the Sky lately?!! Contrails are not really all Water and if they were, they are almost non-existent, Today.
Aggregate emissions of six common pollutants dropped 69% between 1970 and 2014 not to mention 1950
when we started being accountable for our part in World Wide Pollution and what to do about it.


*Pardon me for sounding moronic but, it was once said by Myself; Look at the past to tell the future.
We actually need Pollution to screen Radiation from the Earth's Atmosphere and cool the Earth,
as in a Nuclear Winter!



With that said, I have a question;

Then, Why when there were no controls of sorts mentioned above we were having consistently cold winters in 1950 of 12 feet average Snow Depth recorded on the Ground at Snoqualmie Pass through to 1971 when we had a record Snow Depth recorded on the Ground at Snoqualmie Pass, WA of 31 Feet and in 1999 we had a World Wide Snow Depth Record Set at Mt Baker a Washington Ski Area of 1100 inches of Snow measured on the Ground and now; 2014, 2013 and 2016 we have a record High Temperature average recorded right when All Counties are aware, All Vehicles and factories are at an all time low for Pollutants at least here in the USA (I suppose this is like saying there isn't any water in my end of the Sinking Ship, Right?!!)?


*I've given you all the dates you can look them up yourself and they all match to warming events.
Do you see the connection here?!!
Determined in 1963 Automobiles are the cause and to do the following;
https://en.wikipedia.org/wiki/National_Emissions_ Standards_Act 1965
By 1968 most all Vehicles Except Diesels are adapted with anti pollution devices to control pollution
https://en.wikipedia.org/wiki/Clean_Air_Act_(Unit ed_States) 1990
All Cars are Burning Unleaded Gasoline and running Catalytic Converters
Diesel Cars are running Exhaust Gas Recovery Systems (EGR)
Note: During the 90s several people Failed to commit Suicide by breathing Car Exhaust.
https://en.wikipedia.org/wiki/Global_Warming_Poll ution_Reduction_Act_of_2007
https://en.wikipedia.org/wiki/Kyoto_Protocol 2008-2012
Doha Amendment http://unfccc.int/kyoto_protocol/items/2830.php 2013
The GENx Engine; NO more Jet engines, Just Turbo Props! In Short have you noticed any contrails in the Sky lately?!! Contrails are not really all Water and if they were, proven by they are almost non-existent, Today.
Aggregate emissions of six common pollutants dropped 69% between 1970 and 2014 not to mention 1950 when we started being accountable for our part in World Wide Pollution and what to do about it.


*Pardon me for sounding moronic but, it was once said by Myself; Look at the past to tell the future.
We actually need Pollution to screen Radiation from the Earth's Atmosphere and cool the Earth,
as in a Nuclear Winter!



With that said, I have a question;

Please tell me Why then, when there were no controls of sorts mentioned above we were having consistently cold winters in 1950 of 12 feet average Snow Depth recorded on the Ground at Snoqualmie Pass through to 1971 when we had a record Snow Depth recorded on the Ground at Snoqualmie Pass, WA of 31 Feet and in 1999 we had a World Wide Snow Depth Record Set at Mt Baker a Washington Ski Area of 1100 inches of Snow measured on the Ground and now; 2014, 2015 and 2016 we have a record High Temperature average recorded right when; All Countries are aware and concerned with global warming, All Vehicles and factories are at an all time low for Pollutants at least here in the USA (I suppose this is like saying there isn't any water in my end of the Sinking Ship, Right?!!) and consider the Kyoto Pact https://en.wikipedia.org/wiki/Kyoto_Protocol?


*I've given you links to dated events, you can look the information up yourself, Google Text and see all the information I've quoted matches warming events.
Do you see the connection here?!!
YOU can disagree all you want!
AND I personally agree in that I would rather breath Clean Air but, it's not about me, is it?!!

Clean Air and Clear Skies=An abundant amount of Radiation from the Sun reaching our Planet!