Their study, which appears in the Journal of Politics, found that those living in places experiencing warmer-than-normal temperatures at the time they were surveyed were significantly more likely than others to say there is evidence for global warming.
"Global climate change is one of the most important public policy challenges of our time, but it is a complex issue with which Americans have little direct experience," wrote the study's co-authors, Patrick Egan of New York University and Megan Mullin of Temple University. "As they try to make sense of this difficult issue, many people use fluctuations in local temperature to reassess their beliefs about the existence of global warming."
Their study examined five national surveys of American adults sponsored by the Pew Research Center: June, July, and August 2006, January 2007, and April 2008. In each survey, respondents were asked the following question: "From what you've read and heard, is there solid evidence that the average temperature on earth has been getting warmer over the past few decades, or not?" On average over the five surveys, 73 percent of respondents agreed that the earth is getting warmer.
Egan and Mullin wondered about variation in attitudes among the survey's respondents, and hypothesized that local temperatures could influence perceptions. To measure the potential impact of temperature on individuals' opinions, they looked at zip codes from respondents in the Pew surveys and matched weather data to each person surveyed at the time of each poll. They used local weather data to determine if the temperature in the location of each respondent was significantly higher or lower than normal for that area at that time of year.
Their results showed that an abnormal shift in local temperature is associated with a significant shift in beliefs about evidence for global warming. Specifically, for every three degrees Fahrenheit that local temperatures in the past week have risen above normal, Americans become one percentage point more likely to agree that there is ''solid evidence'' that the earth is getting warmer. The researchers found cooler-than-normal temperatures have similar effects on attitudes—but in the opposite direction.
The study took into account other variables that may explain the results—such as existing political attitudes and geography—and found the results still held.
The researchers also wondered if heat waves—or prolonged higher-than-normal temperatures—intensified this effect. To do so, they looked at respondents living in areas that experienced at least seven days of temperatures of 10° or more above normal in the three weeks prior to interview and compared their views with those who experienced the same number of hot days, but did not experience a heat wave.
Their estimates showed that the effect of a heat wave on opinion is even greater, increasing the share of Americans believing in global warming by 5.0 to 5.9 percentage points.
However, Egan and Mullin found the effects of temperature changes to be short-lived—even in the wake of heat waves. Americans who had been interviewed after 12 or more days had elapsed since a heat wave were estimated to have attitudes that were no different than those who had not been exposed to a heat wave.
"Under typical circumstances, the effects of temperature fluctuations on opinion are swiftly wiped out by new weather patterns," they wrote. "More sustained periods of unusual weather cause attitudes to change both to a greater extent and for a longer period of time. However, even these effects eventually decay, leaving no long-term impact of weather on public opinion."
The findings make an important contribution to the political science research on the relationship between personal experience and opinion on a larger issue, which has long been studied with varying results.
"On issues such as crime, the economy, education, health care, public infrastructure, and taxation, large shares of the public are exposed to experiences that could logically be linked to attitude formation," the researchers wrote. "But findings from research examining how these experiences affect opinion have been mixed. Although direct experience—whether it be as a victim of crime, a worker who has lost a job or health insurance, or a parent with children in public schools—can influence attitudes, the impact of these experiences tends to be weak or nonexistent after accounting for typical predictors such as party identification and liberal-conservative ideology."
"Our research suggests that personal experience has substantial effects on political attitudes," Egan and Mullin concluded. "Rich discoveries await those who can explore these questions in ways that permit clean identification of these effects."
Egan is an assistant professor in the Wilf Family Department of Politics at NYU and Mullin is an associate professor in the Department of Political Science at Temple University.
James Devitt | EurekAlert!
Novel method for investigating pore geometry in rocks
18.06.2018 | Kyushu University, I2CNER
Decades of satellite monitoring reveal Antarctic ice loss
14.06.2018 | University of Maryland
In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...
Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
20.06.2018 | Materials Sciences
20.06.2018 | Information Technology
20.06.2018 | Information Technology