Val Klump

J. Val Klump

  • Professor Emeritus, School of Freshwater Sciences


  • PhD, Marine Sciences, University of North Carolina-Chapel Hill, 1980
  • JD, Georgetown University Law Center, 1975
  • BS, Zoology, Duke University, 1971

Research Interests

  • Biogeochemical cycling in aquatic environments
  • Boundary layer processes
  • Research Impacts Radiochemistry
  • Observing systems and underwater robotics

Research Impacts

Lake Michigan's Green Bay has long suffered from environmental deterioration from our activities - industry, urbanization, agriculture, you name it. Today, despite representing only ~1.4% of the volume of Lake Michigan, Green Bay receives approximately one-third of the total nutrient loading within the entire Lake Michigan basin. Excessive algal blooms and so called “dead zones” (zones where oxygen is too low to support most aquatic life) are now a recurring feature of the bay during summer months.

Our goal is to foster the restoration of the Green Bay ecosystem through looking at what can be done to reduce dead zones, improve water quality and bequeath a healthy ecosystem to future generations. This will require the cooperation and buy-in of the large population within the watershed, and resource agencies armed with science-based predictive tools that will allow effective, adaptive management essential for restoration in the face of an uncertain future.


Val Klump is the former dean and a Professor of the School of Freshwater Sciences at UW-Milwaukee. His research focuses on how nutrients and carbon are cycled in lakes. This work has taken him from the deepest soundings in Lakes Superior and Michigan aboard a research submersible, to the largest and oldest lake in the world—Lake Baikal in eastern Siberia. His recent research highlights the presence and dynamics of “dead zones” in Green Bay including the impact climate change has on their extent and duration.

Klump has served as a board member of several regional and national organizations including: the International Joint Commission’s Science Advisory Board Research Coordination Committee, the US EPA Great Lakes Advisory Board, the NOAA Integrated Ocean Observing System Federal Advisory Committee, the National Association of Marine Laboratories Board of Directors, the Wisconsin Sea Grant Advisory Council, and the Discovery World Board of Directors. He holds a degree in Law from Georgetown University and a PhD in Marine Science from the University of North Carolina at Chapel Hill.

Highlighted Media

Recent and Selected Publications

Klump, J.V., Edgington, D.N., Granina, L., Remsen, C.C. 2020. Estimates of the remineralization and burial of organic carbon in Lake Baikal sediments. J. Great Lakes Res. 46, 102-114

Grunert, B.K., Brunner, S.L., Hamidi, S.A., Bravo, H.R., Klump, J.V., 2018. Quantifying the influence of cold water intrusions in a shallow, coastal system across contrasting years: Green Bay, Lake Michigan, J. Great Lakes Res.

Kaster, J.L., Groff, C.M., Klump, J.V., Rupp, D.L., Hansen, A., Barbour, S., Hall, L., 2018. Evaluation of Lower Green Bay benthic fauna with emphasis on re-ecesis of Hexagenia mayfly nymphs, J. Great Lakes Res. DOI: 10.1016/j.jglr.2018.06.006

Klump, J.V., Brunner, S.L., Grunert, B.K., Kaster, J.L., Weckerly, K.A., Houghton, E.W., Kennedy, J.A., Valenta, T., 2018. Evidence of persistent, recurring summertime hypoxia in Green Bay, Lake Michigan, J. Great Lakes Res.

Zorn, M.E., Waples, J.T., Valenta, T., Kennedy, J.A., Klump, J.V., 2018. High temporal resolution determination of dissolved phosphate in Green Bay, Lake Michigan using continuous monitoring, in situ sensors, J. Great Lakes Res.

Harris, H.J., Wenger, R.B., Sager, P.E., Klump, J.V., 2018. The Green Bay Saga: environmental change, scientific investigation, and watershed management, J. Great Lakes Res.

Klump. J.V., Bratton, J., Fermanich, K., Forsythe, P., Harris, H.J., Howe, R.W., Kaster, J.L. 2018. Green Bay, Lake Michigan: A proving ground for Great Lakes restoration. J. Great Lakes Res.

Lin, P., Klump, J.V., Guo, L. 2018. Variations in chemical speciation and reactivity of phosphorus between suspended-particles and surface-sediment in seasonal hypoxia-influenced Green Bay. J. Great Lakes Res.

Bartlett, S., Brunner, S.L., Klump, J.V., Houghton, E.M., Miller, T.R. 2018. Spatial analysis of toxic or otherwise bioactive cyanobacterial peptides in Green Bay, Lake Michigan. J.Great Lakes Res.

Andrew, M., Routh, J., Dario, M., Bilosnic, M, Kalen, R., Klump, JV, Machiwa, JF. 2018. Temporal and spatial distribution of trace metals in the Rufiji delta mangrove, Tanzania. Environ. Monitoring Assessment 190(6). doi: 10.1007/s10661-018-6707-2

Bravo HR, McLellan SL, Klump JV, Hamidi SA, and Talarczyk D. 2017. Modeling the fecal coliform footprint in a Lake Michigan urban coastal area. Environ Model Software 95:401-419

Bravo, H.R., S.A. Hamidi, J.T. Waples, and J.V. Klump. 2017. Modeling multiple physical drivers of the circulation and thermal regimes impacting seasonal hypoxia in Green Bay, Lake Michigan. In Modeling Coastal Hypoxia – Numerical Simulations of Patterns, Controls and Effects of Dissolved Oxygen Dynamics. Springer.

Waples, J.T., H.A. Bootsma, J.V. Klump. 2017. How are coastal benthos fed? Limnol. Oceanogr. Lett. doi: 10.1002/lol2.10033

Klump, J.V. and Fermanich, K. 2017. CHRP: Green Bay Hypoxia: Biogeochemical Dynamics, Watershed inputs, and Climate change. Final Technical Rpt. NOAA CSCOR NA10NOS4780139, 111 pp. [Full Text PDF]

LaBuhn, S.L and J. V. Klump. 2016. Estimating summertime primary production via in situ monitoring in an eutrophic freshwater embayment, Green Bay, Lake Michigan. J. Great Lakes Res.

DeVilbiss,S.E., Zhengzhen Zhou, J. Val Klump, Laodong Guo. 2016. Spatiotemporal variations in the abundance and composition of bulk and chromophoric dissolved organic matter in seasonally hypoxia-influenced Green Bay, Lake Michigan, USA Science of The Total Environment 565: 742–757

Baskaran, M.M., B. Biddanda, N. Hawley, T. Johengen, J.V.Klump, K.R. Nash, T. Novell, S. Ruberg. 2016. Tracing the seepage of subsurface sinkhole vent waters into Lake Huron using radium and stable isotopes of oxygen and hydrogen. Aquatic Geochemistry 22;349-374. DOI 10.1007/s10498-015-9286-7

MacKenzie R.A., Patra B. Foulk, J. Val Klump. Kimberly Weckerly . Joko Purbospito . Daniel Murdiyarso . Daniel C. Donato . Vien Ngoc Nam. 2016. Sedimentation and belowground carbon accumulation rates in mangrove forests that differ in diversity and land use: a tale of two mangroves. Wetlands Ecol Management DOI 10.1007/s11273-016-9481-3

Lin P., Klump J. V., Guo L., 2015. Dynamics of dissolved and particulate phosphorus influenced by seasonal hypoxia in Green Bay, Lake Michigan. Science of the Total Environment, doi:10.1016/j.scitotenv.2015.09.118.

Bravo, H.R., S.A. Hamidi, J.V. Klump and J.T. Waples. 2015. Currents and heat fluxes induce stratification leading to hypoxia in Green Bay, Lake Michigan. E-proceedings of the 36th IAHR World Congress, 28 June – 3 July, 2015, The Hague, the Netherlands. 1-10.

Ranjan, R. K., J. Routh, J. V. Klump, and A.L. Ramanathan. 2015. Sediment biomarker profiles trace organic matter input in the Pichavaram mangrove complex, southeastern India. Marine Chemistry 02/2015; DOI: 10.1016/j.marchem.2015.02.001

Hamidi, S.A., H. Bravo, J. V. Klump, and J.T. Waples. 2015. The role of circulation and heat fluxes in the formation of stratification leading to hypoxia in Green Bay, Lake Michigan, J. Great Lakes Res.,

Silva, M.R., H.R. Bravo, D.Cherkauer, J.V. Klump, W. Kean, S.L. McLellan. 2014. Effect of hydrological and geophysical factors on formation of standing water and FIB reservoirs at a Lake Michigan beach. J. Great Lakes Res. (

Nold, S.C., M. J. Bellecourt, S.T. Kendall, S.A. Ruberg, T.G. Sanders, J.V. Klump and B.A. Biddanda. 2013. Underwater Sinkhole Sediments Sequester Lake Huron’s Carbon. Biogeochemistry. DOI 10.1007/s10533-013-9830-8.

Waples J.T. and J.V. Klump. 2013. Vertical and horizontal particle transport in the coastal waters of a large lake: An assessment by sediment trap and thorium-234 measurements. J. Geophys. Res: Oceans, VOL. 118, 1–22, doi:10.1002/jgrc.20394, 2013

Ranjan, R.K., J. Routh, A.L. Ramanathan, J.V. Klump. 2011. Elemental and stable isotope records of organic matter input and its fate in the Pichavaram mangrove-estuarine sediments (Tamil Nadu, India). Mar. Chem. 126: 163-172. doi:10.1016/j.marchem.2011.05.005

Read, J., V. Klump, T.H. Johengen, D.J. Schwab, K. Paige, S. Eddy, E.J. Anderson, and C. Manninen. 2010. Working in freshwater: The Great Lakes Observing System contributions to regional and national observations data infrastructure, and decision support. Marine Technology Society Journal 44(6):84-98.

Mueller-Spitz, S.R., L.B. Stewart, J.V. Klump, and S.L. McLellan. 2010. Freshwater suspended sediments and sewage are reservoirs for enterotoxin-positive Clostridium perfringens. Appl. Env. Microb. 76(16) 5556-5562. Doi:10.1128/AEM.01702-09.

Klump, J.V, S.A. Fitzgerald, and J.T. Waples. 2009. Benthic biogeochemical cycling, nutrient stoichiometry, and carbon and nitrogen mass balances in a eutrophic freshwater bay. Limnol. Oceanogr. 54: 792-812.

Liao. Q., H. A. Bootsma, J. Xiao, J.V. Klump, A. Hume, M.H. Long, and P. Berg. 2009. Development of an in situ Underwater Particle Image Velocimetry (UWPIV) System. Limnol. Oceanogr.: Methods : 7: 169-184.

Eadie, B.J., J.A. Robbins, J.V. Klump, D.J. Schwab, and D.N. Edgington. 2008. Winter-spring storms and their influence on sediment resuspension, transport, and accumulation patterns in southern Lake Michigan. Oceanography 21: 62-79.

Fitzgerald S.A., J.V. Klump, P.W. Swarzenski, R.A. Mackenzie and K.D. Richards. 2001. Beryllium-7 as a tracer of short-term sediment deposition and resuspension in the Fox River, Wisconsin. Environ. Sci. Tech. 35: 300-305.

Klump J.V., P. Sager, D.N. Edgington and D. Robertson. 1997. Sedimentary phosphorus cycling and a phosphorus mass balance for the Green Bay ecosystem. Can. J. Fish. Aq. Sci. 54: 10-26.

Edgington D.E., J.V. Klump, J.A. Robbins, Y.S. Kusner, V.D.Pampura and I.V. Sandimirov. 1991. Sedimentation rates, residence times and inventories of Cs- 137 and Pb-210 in Lake Baikal. Nature 350: 601-604.

Klump, J.V., J.R. Krezoski, M.E. Smith and J.L. Kaster. 1987. Dual tracer studies of the assimilation of an organic contaminant from sediments by deposit feeding oligochaetes. Can. J. Fish. Aquat. Sci. 44:1574-1583

Klump, J.V. and C.S. Martens. 1987. Biogeochemical cycling in an organic-rich coastal marine basin. 5. Sedimentary nitrogen and phosphorus budgets based upon kinetic models, mass balances, and the stoichiometry of nutrient regeneration. Geochim. Cosmochim. Acta 51:1161-1173.

Klump, J.V. and C.S. Martens. 1981. Biogeochemical cycling in an organic-rich coastal marine basin. 2. Nutrient sediment-water exchange processes. Geochim. Cosmochim. Acta, 45: 101-121.