Climate change and journalistic norms: A case-study of US mass-media coverage

The Intergovernmental Panel on Climate Change - comprised of top climate scientists from around the globe - has reached consensus that human activities have contributed significantly to global climate change. However, over time, the United States has refused to join concerted international efforts - such as the Kyoto Protocol - to curb human activities contributing to climate change. US newspaper and television media constitute key influences among a set of complex dynamics shaping information dissemination in this politicized environment. Mass-media coverage of climate change is not simply a random amalgam of newspaper articles and television segments; rather, it is a social relationship between scientists, policy actors and the public that is mediated by such news packages. This paper demonstrates that consistent adherence to interacting journalistic norms has contributed to impediments in the coverage of anthropogenic climate change science. Through analysis of US newspaper and television coverage of human contributions to climate change from 1988 through 2004, this paper finds that adherence to first-order journalistic norms - personalization, dramatization, and novelty - significantly influence the employment of second-order norms - authority-order and balance - and that this has led to informationally deficient mass-media coverage of this crucial issue. By critically scrutinizing US print and television media as a 'public arena,' we improve understanding of how journalistic activities have shaped interactions at the interface with climate science, policy and the public. (C) 2007 Elsevier Ltd. All rights reserved.