Marjorie A.M. Friedrichs

Research Assistant Professor of Marine Science

Email: [[marjy]]
Phone: (804) 684-7695
Office: Andrews Hall 337
Department: Biological Sciences

Education

• B.A., Middlebury College
• M.S., Massachusetts Institute of Technology/Woods Hole Oceanographic Institution
• Ph.D., Old Dominion University

Research Interests

Dr. Friedrichs uses numerical models to better understand how and why primary production, and the associated export of carbon, varies among diverse marine environments. Her research involves the application of a number of different types of marine ecosystem models in combination with data assimilation and remotely-sensed ocean color data to study a variety of interdisciplinary oceanographic questions of direct marine biogeochemical relevance.

Current Projects

• Regional Ecosystem Modeling Testbed Project website (RTB)
• Primary Productivity Algorithm Round Robin (PPARR)
• U.S. Eastern Continental Shelf Carbon Cycling: Modeling, Data Assimilation and Analysis (USECoS)

Selected Publications

• Friedrichs, M.A.M., Carr, M.-E., Barber, R., Scardi, M., Antoine, D., Armstrong, R.A., Asanuma,I., Behrenfeld, M.J., Buitenhuis, E.T., Chai, F., Christian, J.R., Ciotti, A.M., Doney, S.C., Dowell, M., Dunne, J., Gentili, B., Gregg, W., Hoepffner, N., Ishizaka, J., Kameda, T., Lima, I., Marra, J., Mélin, F., Moore, J.K., Morel, A., O'Malley, R.T., O'Reilly, J., Saba, V.S., Schmeltz, M., Smyth, T.J., Tjiputra, J., Waters, K., Westberry, T.K., Winguth, A., 2008. Assessing the uncertainties of model estimates of primary productivity in the tropical Pacific Ocean. Journal of Marine Systems, doi:10.1016/j.marsys.2008.05.010. Download or Request Reprint.
• Gregg, W., M.A.M. Friedrichs, A. R. Robinson, K. Rose, R. Schlitzer, and K.R. Thompson, 2008. Skill assessment in ocean biological data assimilation. Journal of Marine Systems, doi:10.1016/j.marsys.2008.05.010. Download or Request Reprint.
• Hofmann, E. E., J.-N. Druon, K. Fennel, M.A.M. Friedrichs, D. Haidvogel, C. Lee, A. Mannino, C. McClain, R. Najjar, J. Siewert, J. OReilly, D. Pollard, M. Previdi, S. Seitzinger, S. Signorini, J. Wilkin, 2008. Eastern U.S. Continental Shelf Carbon Budget: Integrating Models, Data Assimilation, and Analysis, Oceanography, 21 (1): 86-104. Download or Request Reprint.
• Jolliff, J., J.C. Kindle, I. Shulman, B. Penta, M.A.M.Friedrichs, R.Helber, R.A. Arnone, 2008. Summary diagrams for coupled hydrodynamic-ecosystem model skill assessment. Journal of Marine Systems, doi:10.1016/j.marsys.2008.05.014. Download or Request Reprint.
• Stow, C.A., J.K. Jolliff, D.J. McGillicuddy, Jr., S.C. Doney, M.A.M. Friedrichs, J.I. Allen, K.A Rose, and P. Wallhead, 2008. Skill Assessment for Coupled Biological/Physical Models of Marine Systems. Journal of Marine Systems, doi:10.1016/j.marsys.2008.03.011. Download or Request Reprint.
• Friedrichs, M.A.M., J. Dusenberry, L. Anderson, R. Armstrong, F. Chai, J. Christian, S.C. Doney, J. Dunne, M. Fujii, R. Hood, D. McGillicuddy, K. Moore, M. Schartau, Y. H. Sptiz, J. Wiggert, 2007. Assessment of skill and portability in regional marine biogeochemical models: role of multiple phytoplankton groups. Journal of Geophysical Research, 112, CO8001, doi:10.1029/2006JC003852. Download or Request Reprint.
• Carr, M.-E., M.A.M. Friedrichs and the PPARR3 team, 2006. A comparison of global estimates of marine primary production from ocean color. Deep-Sea Research II, 53: 741-770. Download or Request Reprint.
• Friedrichs, M.A.M., R. Hood, and J. Wiggert, 2006. Ecosystem model complexity versus physical forcing: Quantification of their relative impact with assimilated Arabian Sea data. Deep-Sea Research II, 53: 576-600. Download or Request Reprint.
• Hood, R., E. Laws, K. Moore, R. Armstrong, N. Bates, C. Carlson, F. Chai, S. Doney, P. Falkowski, D. Feely, M. Friedrichs, M. Landry, R. Letelier, D. Nelson, T. Richardson, B. Salihoglu, J. Wiggert, and M. Schartau, 2006. Functional group modeling: progress, challenges and prospects. Deep-Sea Research II, 53: 459-512. Download or Request Reprint.
• Friedrichs, M.A.M., 2002. Assimilation of SeaWiFS and JGOFS EqPac data into a marine ecosystem model of the central equatorial Pacific. Deep-Sea Research II, 49: 289-319. Download or Request Reprint.
• Hofmann E.E., and Friedrichs M.A.M., 2002. Predictive modeling for marine ecosystems. In: Robinson, A.R.; McCarthy, J.J.; Rothschild B.J. (eds.), The Sea, Volume 12: Biological-Physical Interactions in the Ocean, John Wiley and Sons, Inc., NY, pp. 537-565. Request Reprint.
• Doney, S.C., I. Lima, K. Lindsay, J.K. Moore, S. Dutkiewicz, M.A.M. Friedrichs, and R. Matear, 2001. Marine biogeochemical modeling. Oceanography, 14 (4): 93-107. Download or Request Reprint.
• Friedrichs, M.A.M., 2001. A data-assimilative marine ecosystem model of the central equatorial Pacific: numerical twin experiments. Journal of Marine Research, 59: 859-894. Download or Request Reprint.
• Friedrichs, M.A.M., and E.E. Hofmann, 2001. Physical control of biological processes in the central equatorial Pacific. Deep-Sea Research I, 48: 1023-1069. Download or Request Reprint.
• Hofmann, E.E., and M.A.M. Friedrichs, 2001. Biogeochemical data assimilation. In: J.H. Steele, S.A. Thorpe, and K.K. Turekian (eds.) Encyclopedia of Ocean Sciences Vol. 1, pp. 302-308. London, UK: Academic Press. Request Reprint.

Professional Memberships

• American Society of Limnology and Oceanography (ASLO)
• American Geophysical Union (AGU)