Thomas Johengen

Research Scientist


PhD, University of Michigan (atmospheric and oceanic science)

MS, Florida State University (oceanography)

BS, Michigan State University (biology)

(734) 741-2203


Dr. Johengen is an Associate Research Scientist and Associate Director of the Cooperative Institute for Great Lakes Research (CIGLR), which is a NOAA Joint Institute program at the University of Michigan with the NOAA-Great Lakes Environmental Research Laboratory serving as the host lab. CIGLR's research activities are focused around five themes including: Climate and Large-Lake Dynamics, Coastal and Nearshore Processes, Lare-Lake Ecosystem Structure and Function, Remote Sensing, and Marine Environmental Engineering. Dr. Johengen's individual research interests focus on nutrient cycling and lower food-web dynamics in the Great Lakes, controlling the introduction of invasive species, and development of in situ water quality sensors and observing systems.

Current research projects include: NOAA-CSCOR, Impacts of multiple stressors on the Saginaw Bay, Lake Huron ecosystem; NOAA-IOOS, Alliance for Coastal Technologies; NOAA-IOOS, Implementation of the Great Lakes Observing System; USEPA, Monitoring Long-trem trends in the lower food web of the Great Lakes; GLFT, Examining Causes and Consequences of the decline of Diporeia in the Great Lakes.

  • 2014-2015 -NOAA-GLERL Ocean and Human Health Program (GLRI funded); Developing Predictive Models for Improving Coastal and Human Health and Beach Forecasting.

  • 2014-2015 -NOAA IOOS Program; Alliance for Coastal Technologies.

  • 2014-2015 -NOAA IOOS Program; Implementation of the Great Lakes Observing System (GLOS), 2011- 2016 (Year 4). 

  • 2014-2015 -NOAA-GLERL (GLRI funded): Implementation of the Great lakes Synthesis, Observations and Response System (SOAR). 

  • 2013-2014 -MARAD: Alliance for Coastal Technologies; Phase X Part 2, Evaluations of Fluorometers for use in Compliance Monitoring of Ballast Water Discharge Regulations. 


IOOS Great Lakes Observing System: Special Recognition Award (2013).

U-M Research Faculty Achievement Award, (2013)

IAGLR: Chandler-Misener (2009)

Award for 2008 Best Paper in JGLR (2009).

NOAA-GLERL: CILER Employee of the Year (2008)

Select publications: 
  • Gobler, C.J., J.M. Burkholder, T.W. Davis, M.J. Harke, T. Johengen, C.A. Stow, D.B. Van de Waal (2016). The dual role of nitrogen supply in controlling the growth and toxicity of cyanobacterial blooms. Harmful Algae 54 (2016) 87-97.

  • Stumpf, R.P., T.W. Davis, T.T. Wynne, J.L. Graham, K.A. Loftin, T.H. Johengen, D. Gossiaux, D. Palladino, A. Burtner (2016). Challenges for mapping cyanobacteria toxin patterns with remotely sensed data. Harmful Algae 54 (2016) 160-173.

  • Reavie, E.D., M. Cai, M.R. Twiss, H.J. Carrick, T.W. Davis, T.H. Johengen, D. Gossiaux, D.E. Smith, D. Palladino, A. Burtner, G.V. Sgro (2016). Diatom production in Lake Erie is an important driver of summer hypoxia. J. Great Lakes Res. 42(3): 608-618.

  • Baskaran, M., T. Novell, K. Nash, S.A. Ruberg, B.A. Biddanda, T. Johengen, N. Hawley and J. V. Klump (2016). Tracing the Seepage of Subsurface Sinkhole Vent Waters into Lake Huron Using Radium and Stable Isotopes of Oxygen and Hydrogen. Aquatic Geochemistry 2016: 1- 26.

  • Drake, L.A., M.N. Tamburri, M.R. First, G.J. Smith, and T.H. Johengen (2014). How many organisms in ballast water discharge? A framework for validating and selecting compliance monitoring tools. Marine Pollution Bulletin, 86:122-128.


Board member of the Canadian Aquatic Invasive Species Network II (2011- present).

Committee member of Great Lakes Aquatic Nuisance Species Panel (2001 – present).