High Quality Content by WIKIPEDIA articles! Tom Wigley is a climate scientist at the University Corporation for Atmospheric Research (UCAR). He was named a fellow of the American Association for the Advancement of Science (AAAS) for his major contributions to climate and carbon-cycle modeling and to climate data analysis, and because he is "one of the world`s foremost experts on climate change and one of the most highly cited scientists in the discipline." Wigley has argued in the popular media that the IPCC has been too optimistic about the prospect of averting harmful climate change by reducing greenhouse emissions, and that "the human-induced changes that are expected over the next 100 years are much, much greater than any changes that societies experienced in the past."