This article is one of several in this special double-issue that reports the views of “users” of IPCC reports. I am a user in the sense that I advise the policy-making community and rely on the IPCC reports to provide me with authoritative views on the state of the science. My principal recommendation for making the IPCC more helpful to the policymaking community is to strive in the Fifth Asses...

Abstract Compared to the observed changes in temperature, precipitation show more uncertainty (Hartmann et al. 2013). The IPCC AR5 indicated that anthropogenic forcing has contributed a global-scale intensification of heavy since second half twentieth century (IPCC 2013) and intensity daily increases under higher warming scenarios (Weber 2018).

Open dumping and landfilling are the prevalent solid waste disposal practices in Thailand. Surveys on the disposal sites revealed the presence of 95 landfills and 330 open dumps. Methane emission potential at these sites was estimated by three methods. Results of the Intergovernmental Panel on Climate Change (IPCC) method, Landfill Gas Emission model (LandGEM), and closed flux chamber technique...

Since the late 1980s, scientists and policy makers have devoted considerable attention and resources to the issue of global climate change. Domestic and international policies in response focus primarily on prevention of future climate impacts on society through the mitigation of carbon dioxide emissions. Academic and political attention is also largely focused on issues of mitigation. Adaptati...

This appendix explains the procedure for developing the pdf for climate sensitivity. The study began by reviewing the five probability density functions for equilibrium climate sensitivity (ECS) used in the IPCC AR5 that draw upon multiple lines of evidence. These are Aldrin et al. (2012), Libardoni and Forest (2013), Olsen et al. (2012), Annan and Hargreaves (2006), and Hegerl et al. (2006). T...

In this paper we examine the evidence for the IPCC (Intergovernmental Panel on Climate Change) estimate that the costs of global climate change will be on the order of 1.5-2.0% of world gross domestic product (GDP). Although this estimate is widely and authoritatively repeated, it rests on a handful of preliminary studies, chiefly of the United States and performed by a select group of economis...

Recent years have seen a notable increase in the production of scientific expertise by large multidisciplinary groups. The issue we address is how reports may be written such groups spite their size and formidable obstacles: complexity subject matter, uncertainty, disagreement. Our focus on International Panel Climate Change (henceforth IPCC), unquestionably best-known case collective expertise...