Sentences with phrase «included human contributions to global warming»

Not exact matches

For those desiring papers with more explicit positions on the cause of global warming, we also used categories that only included papers that explicitly quantified the human contribution to global warming.

Based on an extensive literature review, we suggest that (1) climate warming occurs with great uncertainty in the magnitude of the temperature increase; (2) both human activities and natural forces contribute to climate change, but their relative contributions are difficult to quantify; and (3) the dominant role of the increase in the atmospheric concentration of greenhouse gases (including CO2) in the global warming claimed by the Intergovernmental Panel on Climate Change (IPCC) is questioned by the scientific communities because of large uncertainties in the mechanisms of natural factors and anthropogenic activities and in the sources of the increased atmospheric CO2 concentration.

Our survey also included categories for papers that quantified the human contribution to global warming.

In fact his research was included in the fewer than 3 percent of papers that either rejected or minimized the human contribution to global warming.

Thus Spencer's research was included in the fewer than 3 percent of papers that either rejected or minimized the human contribution to global warming.