Dr. J. Blake Clark

Dr. J. Blake Clark

  • POST DOCTORAL FELLOW
  • 301.286.3621
  • NASA/GSFC
  • Mail Code: 616.1
  • Greenbelt , MD 20771
  • Employer: UNIVERSITIES SPACE RESEARCH ASSOCIATION
  • Research Interests

    Coastal organic carbon cycling

    My research focuses on carbon cycling in the coastal ocean. I use process-based experiments to construct and inform biogeochemical models to investigate carbon cycling on multiple time and space skills. I have ongoing research in the Chesapeake Bay estimating organic matter cycling and fluxes in a tidal marsh influenced estuary, focusing on the export of dissolved organic matter from marshes and the role tidal marshes play in estuarine biogeochemistry. My current focus has shifted to the Arctic where I am taking my skills developed in Chesapeake Bay and applying them to study the organic carbon dynamics of the Yukon River plume.

    Biogeochemical model development

    Incorporating new and important processes into biogeochemical models requires precise field and laboratory measurements to inform mathematical models. Part of my work focuses on identifying current gaps in the biogeochemical modeling frameworks we use. Once identified, targeted sampling and experiments can build data sets that can be used to build a mathematical model. These mathematical models can be implemented on multiple scales to quantify the importance of any given process to elemental cycling as a whole.

    Positions/Employment

    3/2019 - Present

    Postdoctoral Fellow

    Universities Space Research Association, NASA Goddard Space Flight Center

    Professional Service

    Chesapeake Bay Program Scientific and Technical Advisory Committee (STAC) “Assessing the environment in outcome units” workshop. Invited Participant Annapolis, MD. March 20-21, 2019.

    Chesapeake Bay Program Scientific and Technical Advisory Committee (STAC) “Chesapeake Bay Program Climate Change Modeling 2.0 workshop.” Invited Participant Annapolis, MD. September 24-25, 2018

    Awards

    University of Maryland College of Computer, Mathematical and Natural Science Merit fellowship- $5000

    Horn Point Laboratory Graduate Student Research Fellowship - 2 Years of stipend and tuition

    University of Maryland Graduate School Dean’s Fellowship -$5000
     

    Publications

    Refereed

    Clark, J. B., W. Long, and R. R. Hood. 2020. "A Comprehensive Estuarine Dissolved Organic Carbon Budget Using an Enhanced Biogeochemical Model." Journal of Geophysical Research: Biogeosciences, 125 (5): [10.1029/2019jg005442]

    Clark, J. B., P. Neale, M. Tzortziou, F. Cao, and R. R. Hood. 2019. "A mechanistic model of photochemical transformation and degradation of colored dissolved organic matter." Marine Chemistry, 214: 103666 [10.1016/j.marchem.2019.103666]

    Clark, J. B., W. Long, and R. R. Hood. 2017. "Estuarine Sediment Dissolved Organic Matter Dynamics in an Enhanced Sediment Flux Model." Journal of Geophysical Research: Biogeosciences, 122 (10): 2669-2682 [10.1002/2017jg003800]

    Clark, J. B., W. Long, M. Tzortziou, P. J. Neale, and R. R. Hood. 2017. "Wind-Driven Dissolved Organic Matter Dynamics in a Chesapeake Bay Tidal Marsh-Estuary System." Estuaries and Coasts, 41 (3): 708-723 [10.1007/s12237-017-0295-1]

    Testa, J. M., J. B. Clark, W. C. Dennison, et al. E. C. Donovan, A. W. Fisher, W. Ni, M. Parker, D. Scavia, S. E. Spitzer, A. M. Waldrop, V. M. Vargas, and G. Ziegler. 2017. "Ecological Forecasting and the Science of Hypoxia in Chesapeake Bay." BioScience, 67 (7): 614-626 [10.1093/biosci/bix048]

    Talks, Presentations and Posters

    Invited

    Estimating the fluxes and controls of estuarine organic matter: a case study of the Rhode River, MD. Invited Seminar. GCReW Symposium. Smithsonian Environmental Research, Edgewater, MD.

    3 / 28 / 2019

    Estimates of wetland-estuary organic matter cycling using a new biogeochemical modeling system. Invited Seminar. Virginia Institute of Marine Science, College of William and Mary, Gloucester, VA. 

    8 / 22 / 2018

    Modeling organic carbon at the wetland estuary interface – A small model with large insights. Invited Seminar. Smithsonian Environmental Research Center, Edgewater, MD

    12 / 11 / 2017

    Progress and challenges in up-scaling carbon modeling to a regionally significant wetland-estuary system. Lightning talk. Ocean Carbon and Biogeochemistry Workshop, Woods Hole, MA. 

    6 / 24 / 2017

    Other

    Modeling of complex flow patterns across a large wetland-estuarine complex in Southern Dorchester Co, MD. Oral Presentation. Chesapeake Research and Modeling Symposium. Annapolis, MD.

    6 / 14 / 2018

    Modeling of complex flow patterns across a large wetland-estuarine complex in Southern Dorchester Co, MD. Oral Presentation. Atlantic Estuarine Research Society Biennial Meeting. Rehoboth, DE

    4 / 6 / 2018

    Development and application of a mechanistic model of the photochemical degradation of colored dissolved organic matter. Oral presentation. Ocean Sciences Meeting, Portland, OR.

    2 / 14 / 2018

    Modeling of photodegradation and biogeochemical cycling in a wetland-estuary system. Oral. Coastal and Estuarine Research Federation Biennial Conference, Providence, RI.

    11 / 7 / 2017

    Insights gained from a wetland-estuary dissolved organic matter modeling system. Poster. Ocean Carbon and Biogeochemistry Workshop, Woods Hole, MA.

    6 / 26 / 2017

    Modeling of estuarine sediment organic matter remineralization with a dissolved organic matter intermediate state variable. Oral. Aquatic Sciences Meeting, Honolulu, HI

    3 / 1 / 2017

    Mass conservative modeling of dissolved organic matter photochemistry and biogeochemical cycling. Poster. Ocean Carbon and Biogeochemistry Workshop, Woods Hole, MA.

    7 / 27 / 2016

    Modeling the marsh-estuary organic carbon cycle in the Rhode River, MD. Oral. Chesapeake Modeling Symposium, Williamsburg, VA. 

    6 / 1 / 2016

    Atmospheric forcing and marsh dissolved organic matter fluxes: modeling and observations from a Chesapeake Bay tidal marsh-estuary ecosystem. Poster. Ocean Sciences Meeting, New Orleans, LA. 

    2 / 25 / 2016

    Three-dimensional modeling of a Chesapeake Bay tidal marsh Ecosystem, Oral Finite Volume Community Ocean Model (FVCOM) User workshop. Bedford Institute of Oceanography, Halifax, NS, CAN. 

    10 / 21 / 2015

    Three-dimensional modeling of a Chesapeake Bay tidal marsh Ecosystem. Poster Community Surface Dynamic Modeling Systems (CSDMS) Annual Meeting. National Center for Atmospheric Research, Boulder, CO.

    5 / 27 / 2015

    Publications

    Refereed

    Clark, J. B., W. Long, and R. R. Hood. 2020. "A Comprehensive Estuarine Dissolved Organic Carbon Budget Using an Enhanced Biogeochemical Model." Journal of Geophysical Research: Biogeosciences 125 (5): [10.1029/2019jg005442]

    Clark, J. B., P. Neale, M. Tzortziou, F. Cao, and R. R. Hood. 2019. "A mechanistic model of photochemical transformation and degradation of colored dissolved organic matter." Marine Chemistry 214 103666 [10.1016/j.marchem.2019.103666]

    Clark, J. B., W. Long, and R. R. Hood. 2017. "Estuarine Sediment Dissolved Organic Matter Dynamics in an Enhanced Sediment Flux Model." Journal of Geophysical Research: Biogeosciences 122 (10): 2669-2682 [10.1002/2017jg003800]

    Clark, J. B., W. Long, M. Tzortziou, P. J. Neale, and R. R. Hood. 2017. "Wind-Driven Dissolved Organic Matter Dynamics in a Chesapeake Bay Tidal Marsh-Estuary System." Estuaries and Coasts 41 (3): 708-723 [10.1007/s12237-017-0295-1]

    Testa, J. M., J. B. Clark, W. C. Dennison, et al. E. C. Donovan, A. W. Fisher, W. Ni, M. Parker, D. Scavia, S. E. Spitzer, A. M. Waldrop, V. M. Vargas, and G. Ziegler. 2017. "Ecological Forecasting and the Science of Hypoxia in Chesapeake Bay." BioScience 67 (7): 614-626 [10.1093/biosci/bix048]

                                                                                                                                                                                            
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