Just in time to reassure Australians about Julia Gillard's carbon tax. The one she said she was not going to have.
SCIENCE CHINA, Earth Sciences • October 2011 Vol.54 No.10: 1458–1468
FANG JingYun 1,2*, ZHU JiangLing 1,2, WANG ShaoPeng 1. YUE Chao 1 & SHEN HaiHua 1
1 Department of Ecology, Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing 100871, China;
2 Climate Change Research Center, Academic Divisions of the Chinese Academy of Sciences at Peking University, Beijing 100871, China
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. More efforts should be made in order to clarify these uncertainties....
The Intergovernmental Panel on Climate Change (IPCC) was jointly established by the World Meteorological Organization (WMO) and the United Nations Environment Programme (UNEP) in 1988 to evaluate climate changes and their effects on natural and social systems as well as the possible strategies that may be taken by humanity for the adaptation and mitigation of certain issues.... Up to now, four assessment reports have been published by the IPCC. In 2007, the fourth assessment report (AR4) was finalized by more than 450 lead authors and over 800 contributing authors from more than 130 countries…
For the mechanism of global warming, the IPCC report emphasizes the impact of human activities and the correlation between the CO2 concentration and temperature increase. However, the Earth is a complex dynamic system with various factors affecting each other; great uncertainties exist regarding causes and effects of the climate changes .
Therefore, the claims of the IPCC AR4 have been largely questioned. The Non-governmental International Panel on Climate Change (NIPCC), established in 2007, has introduced a number of controversial and divisive debates [8, 9]. The “Climate-gate” and “Glacier-gate” scandals have especially questioned the public credibility of the report [10, 11].