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Faculty Image Michael DeGrandpre
Office: Chemistry 318A
Phone: (406) 243-4118



Mike DeGrandpre received his Ph.D. in Analytical Chemistry from the University of Washington in 1990. He carried out postdoctoral research at Woods Hole Oceanographic Institution in Massachusetts from 1990 to 1993 and held a research associate position there from 1993 through 1995. He joined the chemistry faculty at UM in January of 1996. Mike is an analytical/environmental chemist specializing in developing and using autonomous sensors to study aquatic biogeochemistry and the ocean carbon cycle. 

Research Interests:

My research focuses on the development of autonomous chemical sensors for applications in aquatic (marine and freshwater) chemistry. One of our primary goals is to further our understanding of CO2’s sources and sinks within the world's oceans. Our research has resulted in the development of autonomous CO2 and pH sensors (the Submersible Autonomous Moored Instruments or SAMIs). By deploying the SAMI sensors on ocean moorings and other unmanned platforms, we have determined to what extent processes such as photosynthesis and air-sea gas exchange control CO2 variability.  These results will help develop models to predict the effects of global warming and ocean acidification (the decrease in ocean pH caused by anthropogenic CO2). Our recent field work has primarily focused on the processes that control CO2 in both freshwater (rivers and lakes) and marine environments.  To date, SAMIs have been deployed in all ocean basins except the Indian Ocean. 

Check out our NSF sponsored ocean acidification exhibit developed for UM's science museum spectrUM and highlighted in a the Fall 2013 NSF newsletter. 


Advanced Instrumental Analysis (CHMY 421) Syllabus

Advanced Instrumental Analysis (CHMY 421) Lab Manual

Selected Publications:

DeGrandpre, M.D., Spaulding, R.S., Newton, J., Jaqueth, E., Hamblock, S., Umansky, A., and K.E. Harris. (2014). Considerations for the measurement of spectrophotometric pH for ocean acidification and other studies, Limnol. Oceanog. Methods, 12, 830–839.

Spaulding, R.S., DeGrandpre, M.D., Beck, J.C., Hart, R.D., Peterson, B., DeCarlo, E.H., Drupp, P.S. and T.R. Hammar. (2014).  Autonomous in situ measurements of seawater alkalinity, Env. Sci. Technol., 48, 9573–9581, DOI: 10.1021/es501615x.

Daniels, I., DeGrandpre, M.D. and L. Farias (2013). Greenhouse gas emissions from the Tubul-Raqui estuary (central Chile 36oS), Estuar. Coast. Shelf Sci., 134, 31–44. 

Harris, K.E., DeGrandpre, M.D. and B. Hales (2013). Aragonite saturation state dynamics in a coastal upwelling zone, Geophys. Res. Lett., 40, doi:10.1002/grl.50460. 

Gray, S.E., DeGrandpre, M.D., Langdon, C., and J.E. Corredor. (2012). Short-term and seasonal pH, pCO2 and saturation state variability in a coral-reef ecosystem, Global Biogeochem. Cycles, 26, GB3012, doi:10.1029/2011GB004114.

DeGrandpre, M.D., Martz, T.R., Hart, R.D., Elison, D.M., Zhang, A. and A. Bahnson (2011).  Universal tracer monitored titrations, Anal. Chem., doi:10.1021/ac2025656.

Cullison, S.E., DeGrandpre, M.D., Moore, T.M., Martz, T.R., Friederich, G.E., and K.S. Johnson (2011). Applications of in situ pH measurements for inorganic carbon calculations, Mar. Chem., 125, 82–90.

Lynch, J.K., Beatty, C.M., Seidel, M.P., Jungst, L.J. and M.D. DeGrandpre. (2010). Controls of riverine CO2 over an annual cycle determined using direct, high temporal resolution pCO2 measurements, J. Geophys. Res.- Biogeosciences, 115, G03016, doi:10.1029/2009JG001132.

For a full list of publications, please view DeGrandpre Publications