Technical Experience of Prof. John T. Lehman
Research publications in international books and journals include nutrient dynamics, microanalytical methods, plankton ecology, primary productivity, food web structure, and mathematical modeling.
Conducted whole lake experiments to manipulate water quality and biological communities by selective withdrawal of discharge water and injection of oxygen coupled with real time data visualization.
Over 300 at-sea ship days as Chief Scientist on research vessels of the U.S. academic fleet (University National Oceanic Laboratory System) operating in the St. Lawrence Great Lakes Erie, Huron, Michigan, and Superior from 1983 to 1997; plus additional shipboard research cruises on Lakes Victoria, Edward, and Albert in East Africa, 1991-1995, and Lake Huron 1998-2003. Chief Scientist duties involve preparation of detailed cruise plans to fulfill research objectives, direction of all on-board scientific activities, and preparation of post-cruise assessments.
Coupled numerical climate forecasts from second generation General Circulation Models (GCM climate projections) with lake physical mixing models and with models for biological productivity of Great Lakes in North America and East Africa.
Applied Advanced Very High Resolution Radiometer (AVHRR) satellite imagery to lake surface temperature and mixing dynamics of North American and East African lakes.
Applied LANDSAT thematic mapper spectral data to particle suspension and detection of algal blooms.
Applied NEXRAD next generation weather radar to precipitation estimation and erosion rates at watershed scales.
Participation in bilateral scientific projects in East Africa sponsored by U.S. science agencies: U.S. National Science Foundation and National Oceanic and Atmospheric Administration.
Co-Chair (2001 to 2002) of Steering Committee for IDEAL- an International Decade for the East African Lakes. IDEAL.
Established nutrient chemistry and zooplankton sampling facilities at the Uganda Freshwater Fisheries Research Organisation (now FIRI) at Jinja, Uganda from 1991 to 1995.
Provided technical training for UFFRO/FIRI staff in zooplankton collection, sample processing, and archival procedures for samples and data.
Scientific adviser (2001 to 2002) for technical training program for aquatic science professionals sponsored by MacArthur Foundation, University of Nairobi
Designed water quality and food web sampling studies for nearshore and offshore waters of Lake Victoria conducted by Ugandan scientists.
Developed numerical models of food web dynamics, lake mixing processes, and nutrient recycling.
Developed research plans, quality assurance plans, and numerical models for river and lake analyses including phosphorus dynamics, nutrient loading from point and non-point sources, internal P cycling, and nutrient budgets for aquatic ecosystems in North America and Africa.