1. Need for a Global Biogeochemist / Geochemical Thermodynamicist Retirement of two eminent scientists from our department: Fred Mackenzie Telu Li Retirement of two eminent scientists from our department: Fred Mackenzie Telu Li

2. Qualifications  Fundamental, facile knowledge of thermodynamics and kinetics  Ability to apply this knowledge to the Earth’s coupled ocean-atmosphere-biosphere- sediment system  Ability to build models to address questions on different temporal and spatial scales  Combine observational - laboratory - modeling work (e.g. Berner, Kump, Kasting, Wollast….)  Expertise in contemporary environmental issues  Fundamental, facile knowledge of thermodynamics and kinetics  Ability to apply this knowledge to the Earth’s coupled ocean-atmosphere-biosphere- sediment system  Ability to build models to address questions on different temporal and spatial scales  Combine observational - laboratory - modeling work (e.g. Berner, Kump, Kasting, Wollast….)  Expertise in contemporary environmental issues

3. Carbon Cycle over the Phanerozoic  Saturation state of carbonate minerals  Seawater [DIC] and pH  Atmospheric PCO 2  Mineralogy of carbonate precipitates  Saturation state of carbonate minerals  Seawater [DIC] and pH  Atmospheric PCO 2  Mineralogy of carbonate precipitates Mackenzie (unpubl.)

4. To Construct a Model…  Map out reservoirs and fluxes between reservoirs for relevant elements  Identify processes controlling multi-element cycling  Experimentally-determined rates for key processes (e.g. precipitation, dissolution)  Mesocosm experiments quantifying vital effects on biogenic carbonate precipitation  Pitzer equations for application to time-variant seawater composition  Petrographic study of mineralogical shifts throughout geologic time  Synthesis of data of many individuals  Map out reservoirs and fluxes between reservoirs for relevant elements  Identify processes controlling multi-element cycling  Experimentally-determined rates for key processes (e.g. precipitation, dissolution)  Mesocosm experiments quantifying vital effects on biogenic carbonate precipitation  Pitzer equations for application to time-variant seawater composition  Petrographic study of mineralogical shifts throughout geologic time  Synthesis of data of many individuals

5. Education and Inspiration  Provide fundamental, first-principles basis for understanding surficial biogeochemical processes  From the atomic to the global scale  For the present and the geologic past  Provide synthetic, Earth System Science perspective as a context for smaller scale studies of more limited focus  Provide fundamental, first-principles basis for understanding surficial biogeochemical processes  From the atomic to the global scale  For the present and the geologic past  Provide synthetic, Earth System Science perspective as a context for smaller scale studies of more limited focus