John Lagergren

John Lagergren is a Researcher at Oak Ridge National Laboratory specializing in computational approaches to climate science and environmental analysis. His work bridges high-performance computing with critical global challenges including food security, bioenergy production, and pandemic prevention.

His research focuses on climatic network analysis using exhaustive vector comparison methods to identify environmental zones under climate change. Key interests include longitudinal climate modeling, zoonotic spillover prediction, carbon flux analysis, and systems biology applications for sustainability challenges. His methodology has enabled unprecedented computational scale (9.37 × 10¹⁸ operations/s) for analyzing 100+ quadrillion geospatial relationships.

His 2023 publication in Phytobiomes Journal demonstrates how correlation network analysis can reveal areas experiencing rapid environmental change with implications for global food systems, bioenergy planning, and pandemic preparedness. This work represents one of the largest scientific computations ever performed.

Research funding and collaborations include partnerships with University of Missouri-St. Louis (through co-author Sharlee Climer) and other Oak Ridge National Laboratory teams working on climate-biology intersections.