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Stephen Po-Chedley
Research Scientist, Lawrence Livermore National Laboratory
Expertise: Atmospheric temperature trends, Remote sensing, Climate feedbacks and sensitivity
Details:
Qualifying publication(s): see criteria
ARTICLES REVIEWED
Washington Examiner op-ed cherry-picks data and misleads readers about climate models
in The Washington Examiner, by Patrick Michaels, Caleb Stewart Rossiter
— 31 Aug 2019
"This article focuses only on specific lines of evidence that climate models disagree with observations. In doing so, the authors ignore research that helps to reconcile difference..
New York Times’ coverage of IPCC report clearly presents conclusions
in The New York Times, by Coral Davenport
— 24 Jan 2019
This story in The New York Times covered the October release of the IPCC's "Global Warming of 1.5 °C" report. Scientists who reviewed the story found that it provided an accurate...
Popular story on Fox2Now accurately describes 2017 global temperature, sea ice extent
in Fox2News, CNN, by Brandon Miller
— 04 Dec 2018
"The article is factually correct. The reality that Arctic sea ice is getting younger is not so well known from the public, so such an article is welcome.
The article’s title an..
Guardian story conveys statement by scientists stressing role of deforestation in climate change
in The Guardian, by Oliver Milman
— 09 Oct 2018
"The article correctly links estimates of current carbon dioxide emissions from land use and land cover change with fairly conservative estimates for potential carbon sequestration..
USA Today story accurate but lacks clarity regarding timescales over which warming could be underestimated
in USA Today, by Doyle Rice
— 10 Jul 2018
"An accurate and balanced article that gives readers a good flavour of the research but the reference to “Earth’s history” might confuse some when it otherwise refers to the ..
New York Times’ news coverage of 2016 global temperature data was an accurate summary
in The New York Times, by Justin Gillis
— 16 Jan 2018
"A clear and accurate article on the temperature record in 2016, looking back at the records in 2015 and 2014. The article places them in the proper context of long-term warming, w..
Daily Caller uncritically reports poorly supported conclusion of satellite temperature study
in The Daily Caller, by Michael Bastasch
— 04 Dec 2017
"The absence of accelerating warming trends is meant to go against prevailing climate science, but I find that to be a strawman argument. In that sense the article is misleading—..
CLAIMS REVIEWED
Warming of Earth’s surface and oceans continues apace, contrary to claims in blog
CLAIM
”Global warming started to run out of steam over two decades ago… Half of the apparent global temperature increase from January 1910 to January 2000 is due to administrative adjustments.”
SOURCE: Chris Morrison, Daily Sceptic
Published: 09 Jun 2022
VERDICT
In viral Turning Point USA video, Candace Owens and Charlie Kirk falsely claim there is no evidence of global warming and scientists don’t know the cause
CLAIM
There is no factual data to back up global warming; real scientists don’t know whether CO2, solar sunspots or natural activity cause global warming
SOURCE: Candace Owens, Charlie Kirk , Turning Point USA
Published: 16 Apr 2021
VERDICT
NOAA shows clear global warming trends over the past 58 years based on radiosonde data
CLAIM
“The 58 year net gain of global temperature is zero. We are simply in a cyclical, normal ebb and flow of temperature.”
SOURCE: Facebook users, Facebook
Published: 05 Feb 2021
VERDICT
Human-induced increases in greenhouse gases are the primary driver of global warming, contrary to claims in CFACT article
CLAIM
They tell us that we are the primary forces controlling earth temperatures by the burning of fossil fuels and releasing their carbon dioxide. I hope my readers can recognize the absurdity of their claims. … increasing sunspots are linked to increases in earth temperature
SOURCE: Jay Lehr, CFACT
Published: 15 Apr 2020
VERDICT
Temperature trends in the U.S. are consistent with warming around the world, contrary to Electroverse claim
CLAIM
Historical data of temperature in the U.S. destroys global warming myth
SOURCE: Cap Allon, Electroverse
Published: 24 Mar 2020
VERDICT
Non-peer-reviewed manuscript falsely claims natural cloud changes can explain global warming
CLAIM
During the last hundred years the temperature is increased about 0.1°C because of carbon dioxide. The human contribution was about 0.01°C.
SOURCE: Jyrki Kauppinen, Pekka Malmi, Paul Joseph Watson, Summit.news, Zerohedge
Published: 12 Jul 2019
VERDICT
There is clear evidence for the existence of climate change contrary to claims by John Coleman
CLAIM
Climate change is not happening, there is no significant man-made global warming now, there hasn't been any in the past, and there's no reason to expect any in the future.
SOURCE: John Coleman, Derek Utley
Published: 30 Apr 2019
VERDICT
Rush Limbaugh falsely claims there is no evidence of human-caused global warming
CLAIM
There isn’t yet any empirical evidence for their claim that greenhouse gases even cause temperatures to increase.
SOURCE: Rush Limbaugh, The Rush Limbaugh Show
Published: 04 Apr 2018
VERDICT
Prof. John Christy incorrectly claims to show climate models are too sensitive to carbon dioxide
CLAIM
the real atmosphere is less sensitive to CO2 than what has been forecast by climate models
SOURCE: John Christy, The Daily Caller
Published: 01 Dec 2017
VERDICT