Dr Michael MacCracken – Is a lead scientific advisor to Envisionation, based in Washington DC USA – he is one of United States top independent international climate scientists, his career which has involved senior positions in governmental and leading scientific bodies, is easily traceable on the Internet as one of the most internationally respected voices on climate change. https://en.wikipedia.org/wiki/Michael_MacCracken
He has been serving as Chief Scientist for Climate Change Programs with the Climate Institute in Washington DC since October 2002.
After graduating from Princeton in 1964 with a B.S. in Engineering, Mike won one of the first John and Fannie Hertz Foundation fellowships to pursue his Ph.D. in Applied Science at the University of California Davis campus extension in Livermore, California.
His dissertation involved constructing one of the world’s first global climate models and applying it to evaluation of various hypotheses of glacial-interglacial cycling over the last million years. Upon receiving his Ph.D. in 1968, Dr. MacCracken joined the Physics Department at the Lawrence Livermore National Laboratory (LLNL) as an atmospheric physicist. His research over the next 25 years focused on using climate models to investigate the causes of recent and prospective climate change, including the climatic effects of greenhouse gases, volcanic aerosols, land-cover change, and nuclear war, using an air quality model he led development of to identify approaches to reducing photochemical air pollution in the San Francisco Bay Area, leading a Department of Energy (DOE) multi-laboratory study of sulfate pollution in the northeastern United States, and working with DOE on the initiation of their climate change program from the late 1970s to early 1990s.
From 1993-2002, Dr. MacCracken was on assignment from LLNL to serve as senior global change scientist with the interagency Office of the U.S. Global Change Research Program (USGCRP). As part of this assignment, he served from 1993-1997 as executive director of the USGCRP Office from 1993-1997 and as executive director of USGCRP’s coordination office for the first U.S. National Assessment from 1997-2001, which focused on the potential consequences of climate variability and change on theUnited States. This assessment described impacts for both regions across the United States and for the health, agriculture, forest, water resource, and coastal sectors of the economy. During his assignment with the USGCRP Office, Dr. MacCracken also coordinated preparation of the official U.S. Government reviews of IPCC’s second and third assessments, and served as a contributing author on several IPCC chapters and as review editor for the North America chapter for IPCC’s Fourth Assessment Report.
Since officially retiring in 2002 after 34 years with LLNL, his recent research interests and activities with the Climate Institute have focused on the potential beneficial climatic effects of sharply limiting emissions of non-CO2 greenhouse gases (i.e., methane, tropospheric ozone, hydrofluorocarbons) and aerosols (particularly black carbon), and of exploring the potential for climate intervention (as referred to as geoengineering) to counterbalance the warming influences of greenhouse gas emissions, particularly by focusing initially on alleviating specific regional impacts.
In addition to his activities with the Climate Institute, Dr. MacCracken was elected to serve as president of the International Association of Meteorology and Atmospheric Sciences from 2003-2007, as a member of the Assessment Integration Team for the Arctic Climate Impact Assessment from 2002-2004, and as the lone atmospheric scientist on the international Scientific Committee for Oceanic Research from 2003-11.
From 2005-2007, he served as a co-lead author for the report Confronting Climate Change: Avoiding the Unmanageable and Managing the Unavoidable that was prepared for the United Nations Commission on Sustainable Development by an international panel organized by Sigma Xi and the United Nations Foundation. In addition to his scientific research, Dr. MacCracken has submitted several legal declarations in support of national level efforts to limit climate change, the most recognized of which was his affidavit concerning global climate change and impacts on particular regions offered in support of standing for the plaintiffs that was cited favorably by Justice Stevens in his opinion in the very important April 2007 decision by the U.S. Supreme Court in the very important case of Massachusetts et al. versus EPA, which has since then underpinned most of the regulatory actions that the Obama Administration has been taking to limit emissions contributing to global climate change.