Eric Merkley and Dominik A. Stecula. “Party Elites or Manufactured Doubt? The Informational Context of Climate Change Polarization.” Science Communication (Forthcoming).

Online Appendix `Pre-print Version

Abstract: Americans polarized on climate change despite decreasing uncertainty in climate science. Explanations focused on organized climate skeptics and ideologically driven motivated reasoning are likely insufficient. Instead, Americans may have formed their attitudes by using party elite cues. We analyze the content of over 8,000 print, broadcast, and cable news stories. We find that coverage became increasingly partisan as climate change rose in salience, but climate skeptics received scant attention. Democratic messages were more voluminous and consistently pro–climate science, while Republican messages have been scarcer and ambiguous until recently. This suggests Republican voters took cues from Democratic elites to reject climate science.