Haejin (Jinny) Han is a Research Fellow in the School of Natural Resources and Environment at the University of Michigan. She received dual B.S.s in Environmental and Electronic Engineering and a M.S. in Environmental Engineering & Science at Ewha women’s University in South Korea and a Ph.D. at the University of Michigan in Aquatic Ecology. Her research areas of concentration are nutrient biogeochemistry, geospatial analysis, environmental modeling and ecosystem science. Her doctoral research focuses on estimating anthropogenic nitrogen (N) loading to 25 watersheds of the Lake Michigan basin from 1920 to 2002 to examine temporal and spatial variation in net anthropogenic nitrogen inputs in relation to land use, climate, and agricultural practices. She also explored how well anthropogenic N input and climate are able to predict temporal and spatial variation N export by rivers to Lake Michigan. She developed an advanced statistical model that simultaneously incorporates spatial and temporal data on anthropogenic N inputs and water discharge to predict riverine TN export over time and space. In addition, she built her own automatic N accounting model using Visual Basic programming language, to efficiently manipulate tremendous amounts of spatial and historical data from 100 counties over 80 years. Currently, she is working on a research project involving Phosphorus (P) budgeting for Lake Erie watersheds to better understand and forecast the exact conditions that leads to a hypoxic state for this Great Lake. This work is funded by the Center for sponsored Coastal Ocean Research, Coastal Ocean Program of the National Oceanic and Atmospheric Administration.