Question: James Hansen, an adjunct professor at Columbia University, dubbed which famous Serbain-born American physicist "the godfather of black carbon"?

 He is best known for his research in climatology, his 1988 Congressional testimony on climate change that helped raise broad awareness of global warming, and his advocacy of action to avoid dangerous climate change.  In recent years he has become a climate activist to mitigate the effects of climate change, on a few occasions leading to his arrest. James Edward Hansen (born 29 March 1941) is an American adjunct professor in the Department of Earth and Environmental Sciences at Columbia University. <SEP> Mark Zachary Jacobson (born 1965) is a professor of civil and environmental engineering at Stanford University and director of its Atmosphere/Energy Program.  Jacobson develops computer models to study the effects of different energy technologies and their emissions on air pollution, weather, and climate.  He has performed influential research on the role of black carbon and other aerosol chemical components on global and regional climate and is regarded as a leading aerosol climate modeler.  In a 2001 highly cited paper in the Journal Nature, Jacobson posited that black carbon, which is emitted during fossil fuel, biofuel, and biomass burning, may be the second leading cause of global warming after carbon dioxide in terms of direct radiative forcing.  For this and related work, he received the 2005 American Meteorological Society Henry G. Houghton Award for “significant contributions to modeling aerosol chemistry and to understanding the role of soot and other carbon particles on climate” and a 2013 American Geophysical Union Ascent Award for “his dominating role in the development of models to identify the role of black carbon in climate change.” <SEP> Tihomir Novakov, Ph.D known also as Tica Novakov (March 16, 1929 – January 2, 2015) was a Serbian-born American physicist.  As a scientist, Novakov is known for his black carbon, air quality, and climate change research.  James Hansen dubbed him "the godfather of black carbon." <SEP> Andrew P. Vayda is Distinguished Professor Emeritus of Anthropology and Ecology at Rutgers University, an Adjunct Professor at Monash University and at the University of Indonesia, and Senior Research Associate of the Center for International Forestry Research (CIFOR) in Bogor, Indonesia.  Formerly a professor at Columbia University, he has taught also at the University of Indonesia and other Indonesian universities and at the University of British Columbia.  He specializes in methodology and explanation at the interface between social and ecological science and has directed and participated in numerous research projects on people’s interactions with forests in Indonesia and Papua New Guinea.  Currently he is taking part in a research project on causes of peat fires and their consequences in carbon emissions in the Indonesian province of Central Kalimantan.  He has published some hundred articles and several books, including "Explaining Human Actions and Environmental Changes", a selection of his essays on explanation and explanation-oriented research in the social sciences and human ecology, published by AltaMira Press in 2009, and "Causal Explanation for Social Scientists: A Reader", co-edited by him and Bradley Walters, published by AltaMira Press in 2011.  The journal, "Human Ecology", was founded by him, and he was its editor for five years.  He serves at present on the editorial boards of Borneo Research Council Publications, "Forests", "International Journal of Indonesian Studies", and "Human Ecology".  A festschrift in his honor, "Against the Grain: The Vayda Tradition in Human Ecology and Ecological Anthropology", with a concluding chapter by him on “Causal Explanation as a Research Goal,” was published in 2008 by AltaMira Press.