Fox News host Jesse Watters recycled a claim climate change deniers have been making for years.
“Hottest year on record, huh?” Watters asked Jan. 31 on “Jesse Watters Primetime,” his skepticism apparent. He expressed doubts about the longevity and accuracy of global temperature records, then criticized the legitimacy of National Oceanic and Atmospheric Administration’s temperature data collection.
NOAA, the federal agency that studies weather, oceans and the climate, is “putting the thermometers in the cities … on concrete and asphalt,” Watters said.
“You ever been to the city in the summer?” he asked. “You ever walk around in your bare feet on a city sidewalk in August? It’s hot. That’s where we’re putting the thermometers to measure the world’s temperature. On little heat islands.”
Concrete and asphalt attracts and retains heat more than countryside landscapes, Watters said. “It can be 10 degrees hotter in the city than the country on the same day.”
“The government’s been placing thermometers to measure global warming on airport runways,” he said, adding that others were found in parking lots, rooftops and “in exhaust fans of (air conditioning) units.”
“No wonder we think the Earth’s warming,” Watters said. “We’re literally cooking the books.”
(Internet Archive)
That claim is misleading: Climate scientists know a weather station’s site conditions can affect temperature data, and therefore use algorithms to adjust the data accordingly, experts say. Also, climate change analysis focuses on trends over time, and independent groups that track temperature data around the world all report that annual global average temperatures are rising.
The claim’s source: An outdated report and erroneous depiction of urban heat islands
During the segment, Watters shared a Jan. 29 X post that said, “Documents clearly show that 96% of U.S. temperature reporting stations are improperly located” in places that produce “unrealistic warming” because of heat islands. That refers to the effect of urban infrastructure like roads and bridges retaining and re-emitting the sun’s heat, causing higher temperatures than in more natural landscapes.
Watters didn’t show it in the broadcast, but the post linked to a 2022 blog post titled “96% of U.S. climate data is corrupted” about a report by the Heartland Institute, a conservative think tank. Climate experts criticized the report, which was written by someone climate scientists called a “well-known climate denialist.” In 2022, we rated that 96% climate data claim False.
The 2022 Heartland Institute’s report analyzed 128 temperature stations out of several thousand volunteer-run stations and found that 96% of them failed to meet NOAA’s placement recommendations. Experts said the report then incorrectly extrapolated that data to falsely claim that improper station placement undermined long-term climate change trends.
Many of Watters’ claims — such as the idea that thermometers used to measure global temperatures are in asphalt parking lots, at airports or near air conditioners — echoed details in the Heartland Institute’s report.
We also contacted Fox News, and a Watters spokesperson provided a link to an EPA site on the “Heat Island Effect.”
“Daytime temperatures in urban areas are about 1–7°F(ahrenheit) higher than temperatures in outlying areas and nighttime temperatures are about 2-5°F higher,” read the passage the spokesperson identified.
Kristina Dahl, the principal climate scientist for the Union of Concerned Scientists’ Climate & Energy program, cautioned against using the urban heat island effect to explain the documented rise in global temperatures.
“It might be easier to make urbanization the villain here or to try to pin the temperature trends observed at stations around the globe on urbanization alone,” she said. But “comparing temperature trends from urban vs. rural weather stations shows that warming is happening in both types of environments.”
Scientists who track climate data account for the urban heat island effect when evaluating temperature changes, NASA said on its website.
Global data show rising temperatures
NOAA data shows that temperatures have warmed by about 1.8 degrees Fahrenheit since the agency began tracking climate data in 1850, Dahl said.
“Other climate agencies in the U.S. and around the world show the same thing,” Dahl said. “All of those agencies also found that 2023 was the hottest year on record.”
A cyclist finishes his ride early to beat high temperatures, Monday, July 10, 2023, in Phoenix. National Weather Service says Phoenix has had 10 consecutive days of 110 degrees or above. (AP)
Dahl said there’s no merit to Watters’ claim that NOAA is rigging data to ensure it shows rising temperatures.
“Both NOAA and NASA rely on data from a global network that includes thousands of weather stations as well (as) water temperature measurements from ships and buoys in the ocean,” she said. Those stations are in a variety of places. “When I look at stations within the San Francisco Bay Area, for example, there are some in dense urban areas, some in city parks, some in coastal mountain ranges, and some in small towns.”
Robert Rohde, the lead scientist at Berkeley Earth, a California-based organization providing global temperature data, told PolitiFact in 2022 that NOAA and the National Weather Service have two programs to monitor U.S. weather conditions. The volunteer-run program, which was the Heartland Institute’s study’s exclusive focus, has less rigorous standards for where temperature stations can be installed. The other program has more sophisticated, automated weather stations and more stringent location requirements.
Temperature stations for global temperature analyses are “from a blend of urban and rural locations” and meet requirements for equipment and location standards, said Karin Gleason, monitoring section chief from NOAA’s National Centers for Environmental Information.
“Homogeneity algorithms are applied to the data collected so that they can be compared with stations from around the world on more equal footing,” she said. “This allows for an apples-to-apples comparison, removing bias from artificial environments.”
Dahl said she has no concerns about potential bias in NOAA’s temperature station locations. If NOAA’s data were biased, she said it’s unlikely its findings “would consistently be reproduced by other climatological organizations around the world that use different methodologies to deduce global temperature trends.”
Our ruling
Watters claimed that “we think the Earth’s warming” because “we’re literally cooking the books” with NOAA’s flawed global temperature data.
His claim was based on a misunderstanding of the urban heat island effect and a 2022 report that falsely concluded 96% of U.S. climate data is corrupted. Climate scientists know a weather station’s site conditions can affect temperature data, and therefore adjust the data accordingly, experts say.
Climate change analysis focuses on change over time, and independent groups that track temperature data around the world all report that annual global average temperatures are rising.
We rate this claim False.
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