Countries of authors ranked by publication output within the time period 1980–2012 (only countries with at least 1,000 papers are considered).

All contributing authors are considered; this implies a substantial overlap, since the cooperating authors of a specific paper often work in different countries. In addition, the bibliometric indicators PPTop 50%, PPTop 10%, and PPTop 1% of the countries are included: Column (1) includes the impact of climate change papers, and column (2) displays the impact of climate change papers relative to the overall impact of the countries’ papers published between 1980 and 2012.