This two-part study integrates a quantitative review of one year of US newspaper coverage of climate science with a qualitative, comparative analysis of media-created themes and frames using a social constructivist approach. In addition to an examination of newspaper articles, this paper includes a reflexive comparison with attendant wire stories and scientific texts. Special attention is given to articles constructed with and framed by rhetoric emphasising uncertainty, controversy, and climate scepticism. r

Public perception of global climate change is strongly influenced by media constructions of scientific knowledge. This paper explores recent scientific findings and the press coverage thereof and is based on a content analysis of two years of global reporting on climate related positive feedback mechanisms (climate system responses to global warming which lead to further warming). Results indicate that non-US news organizations, especially in the UK, are at the forefront of the discourse on climate feedback loops. Poor US press coverage on such climate thresholds might be understood not only as self-censorship, but as a "false negative" error.The new paradigm of an abruptly changing climatic system has been well established by research over the last decade, but this new thinking is little known and scarcely appreciated in the wider community of natural and social scientists and policymakers. (National Academies' National Research Council, 2002: 1)

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