Katja Fennel

Professor

Canada Research Chair, Tier II: Marine Prediction

Email: katja.fennel@dal.ca

View Katja Fennel's Complete Profile


View Katja Fennel's Publications Sorted by Date

Recent Submissions

  • Sediment-water column fluxes of carbon, oxygen and nutrients in Bedford Basin, Nova Scotia, inferred from super(224)Ra measurements 

    Burt, W. J., H. Thomas, K. Fennel, and E. Horne. 2013. "Sediment-water column fluxes of carbon, oxygen and nutrients in Bedford Basin, Nova Scotia, inferred from super(224)Ra measurements." Biogeosciences 10(1): 53-66.
    Exchanges between sediment pore waters and the overlying water column play a significant role in the chemical budgets of many important chemical constituents. Direct quantification of such benthic fluxes requires explicit ...
  • Sequential data assimilation applied to a physical-biological model for the Bermuda Atlantic time series station 

    Mattern, J. P., M. Dowd, and K. Fennel. 2010. "Sequential data assimilation applied to a physical-biological model for the Bermuda Atlantic time series station." Journal of Marine Systems 79(1-2): 144-156.
    In this study, we investigate sequential data assimilation approaches for state estimation and prediction in a coupled physical-biological model for the Bermuda Atlantic Time Series (BATS) site. The model is 1-dimensional ...
  • A one ocean model of biodiversity 

    O'Dor, Ronald K., Katja Fennel, and Edward Vanden Berghe. 2009. "A one ocean model of biodiversity." Deep-Sea Research Part Ii-Topical Studies in Oceanography 56(19-20): 1816-1823.
    The history of life is written in the ocean, and the history of the ocean is written in DNA. Geologists have shown us that hundreds of millions of years of ocean history can be revealed from records of a single phylum in ...
  • Estimating time-dependent parameters for a biological ocean model using an emulator approach 

    Mattern, Jann Paul, Katja Fennel, and Michael Dowd. 2012. "Estimating time-dependent parameters for a biological ocean model using an emulator approach." Journal of Marine Systems 96-97: 32-47.
    We use a statistical emulator technique, the polynomial chaos expansion, to estimate time-dependent values for two parameters of a 3-dimensional biological ocean model. We obtain values for the phytoplankton carbon-to-chlorophyll ...
  • Introduction and Assessment of Measures for Quantitative Model-Data Comparison Using Satellite Images 

    Mattern, Jann Paul, Katja Fennel, and Michael Dowd. 2010. "Introduction and Assessment of Measures for Quantitative Model-Data Comparison Using Satellite Images." Remote Sensing 2(3): 794-818.
    Satellite observations of the oceans have great potential to improve the quality and predictive power of numerical ocean models and are frequently used in model skill assessment as well as data assimilation. In this study ...
  • Modeling the dynamics and export of dissolved organic matter in the Northeastern US continental shelf 

    Druon, J. N., A. Mannino, S. Signorini, C. McClain, et al. 2010. "Modeling the dynamics and export of dissolved organic matter in the Northeastern US continental shelf." Estuarine Coastal and Shelf Science 88(4): 488-507.
    Continental shelves are believed to play a major role in carbon cycling due to their high productivity. To improve our understanding of carbon dynamics on continental margins, a dissolved organic matter (DOM) model was ...
  • Interannual variability in atmospheric CO2 uptake on the northeast US continental shelf 

    Previdi, Michael, Katja Fennel, John Wilkin, and Dale Haidvogel. 2009. "Interannual variability in atmospheric CO2 uptake on the northeast US continental shelf." Journal of Geophysical Research-Biogeosciences 114: 04003-G04003.
    Continental shelf systems are thought to play an important role in the exchange of carbon dioxide (CO2) between the atmosphere and ocean. Currently, our ability to quantify the air-sea flux of CO2 on continental shelves ...
  • The rise of oxygen over the past 205 million years and the evolution of large placental mammals 

    Falkowski, PG, ME Katz, AJ Milligan, K. Fennel, et al. 2005. "The rise of oxygen over the past 205 million years and the evolution of large placental mammals." Science 309(5744): 2202-2204.
    On the basis of a carbon isotopic record of both marine carbonates and organic matter from the Triassic-Jurassic boundary to the present, we modeled oxygen concentrations over the past 205 million years. Our analysis ...
  • How the coupling of the C, N and O cycles determines atmospheric CO2 and O-2 concentrations 

    Falkowski, P., K. Fennel, and M. Follows. 2005. "How the coupling of the C, N and O cycles determines atmospheric CO2 and O-2 concentrations." Geochimica et Cosmochimica Acta 69(10): 723-A723.
    No abstract available.
  • Convection and the timing of phytoplankton spring blooms in the western Baltic Sea 

    Fennel, K.. 1999. "Convection and the timing of phytoplankton spring blooms in the western Baltic Sea." Estuarine Coastal and Shelf Science 49(1): 113-128.
    The influence of water column stability on the occurrence of phytoplankton spring blooms in an estuarine system (western Baltic Sea) was studied by means of a coupled 3-D model. The model comprised a mesoscale circulation ...
  • The role of continental shelves in nitrogen and carbon cycling: Northwestern North Atlantic case study 

    Fennel, K.. 2010. "The role of continental shelves in nitrogen and carbon cycling: Northwestern North Atlantic case study." Ocean Science 6(2): 539-548.
    Continental shelves play a key role in the cycling of nitrogen and carbon. Here the physical transport and biogeochemical transformation processes affecting the fluxes into and out of continental shelf systems are reviewed, ...
  • Modeling the Dynamics of Continental Shelf Carbon 

    Hofmann, Eileen E., Bronwyn Cahill, Katja Fennel, Marjorie A. M. Friedrichs, et al. 2011. "Modeling the Dynamics of Continental Shelf Carbon." Annual Review of Marine Science, Vol 3 3: 93-122.
    Continental margin systems are important contributors to global nutrient and carbon budgets. Effort is needed to quantify this contribution and how it will be modified under changing patterns of climate and land use. Coupled ...
  • Measurements of spectral optical properties and their relation to biogeochemical variables and processes in Crater Lake, Crater Lake National Park, OR 

    Boss, Emmanuel S., Robert Collier, Gary Larson, Katja Fennel, et al. 2007. "Measurements of spectral optical properties and their relation to biogeochemical variables and processes in Crater Lake, Crater Lake National Park, OR." Hydrobiologia 574: 149-159.
    Spectral inherent optical properties (IOPs) have been measured at Crater Lake, OR, an extremely clear sub-alpine lake. Indeed Pure water IOPs are major contributors to the total IOPs, and thus to the color of the lake. ...
  • EASTERN US CONTINENTAL SHELF CARBON BUDGET Integrating Models, Data Assimilation, and Analysis 

    Hofmann, Eileen, Jean-Noel Druon, Katja Fennel, Marjorie Friedrichs, et al. 2008. "EASTERN US CONTINENTAL SHELF CARBON BUDGET Integrating Models, Data Assimilation, and Analysis." Oceanography 21(1): 86-104.
    No abstract available.
  • A box model approach for a long-term assessment of estuarine eutrophication, Szczecin Lagoon, southern Baltic 

    Humborg, C., K. Fennel, M. Pastuszak, and W. Fennel. 2000. "A box model approach for a long-term assessment of estuarine eutrophication, Szczecin Lagoon, southern Baltic." Journal of Marine Systems 25(3-4): 387-403.
    We develop a layered "box, model" to evaluate the major effects of estuarine eutrophication of the Szczecin lagoon which can be compared with integrating measures (chlorophyll a (Chl a), sediment burial, sediment oxygen ...
  • Domoic acid uptake and elimination kinetics in oysters and mussels in relation to body size and anatomical distribution of toxin 

    Mafra, Luiz L.,Jr., V. Monica Bricelj, and Katja Fennel. 2010. "Domoic acid uptake and elimination kinetics in oysters and mussels in relation to body size and anatomical distribution of toxin." Aquatic Toxicology 100(1): 17-29.
    Toxin accumulation by suspension-feeding qualifier depends on a balance between processes regulating toxin uptake (i.e. ingestion and absorption of toxic cells) and elimination (i.e. egestion, exchange among tissues, ...
  • Data assimilation with a local Ensemble Kalman Filter applied to a three-dimensional biological model of the Middle Atlantic Bight 

    Hu, Jiatang, Katja Fennel, Jann Paul Mattern, and John Wilkin. 2012. "Data assimilation with a local Ensemble Kalman Filter applied to a three-dimensional biological model of the Middle Atlantic Bight." Journal of Marine Systems 94: 145-156.
    A multivariate sequential data assimilation approach, the Localized Ensemble Kalman Filter (LEnKF), was used to assimilate daily satellite observations of ocean chlorophyll into a three-dimensional physical-biological model ...
  • Simulating the effects of phosphorus limitation in the Mississippi and Atchafalaya River plumes 

    Laurent, A., K. Fennel, J. Hu, and R. Hetland. 2012. "Simulating the effects of phosphorus limitation in the Mississippi and Atchafalaya River plumes." Biogeosciences 9(11): 4707-4723.
    The continental shelf of the northern Gulf of Mexico receives high dissolved inorganic nitrogen and phosphorus loads from the Mississippi and Atchafalaya rivers. The nutrient load results in high primary production in the ...
  • Statistical validation of a 3-D bio-physical model of the western North Atlantic 

    Lehmann, M. K., K. Fennel, and R. He. 2009. "Statistical validation of a 3-D bio-physical model of the western North Atlantic." Biogeosciences 6(10): 1961-1974.
    High-resolution, physical-biological models of coastal and shelf regions typically use a single functional phytoplankton group, which limits their ability to represent ecological gradients (e.g. highly productive shelf ...
  • Biological overprint of the geological carbon cycle 

    Katz, ME, JD Wright, KG Miller, BS Cramer, et al. 2005. "Biological overprint of the geological carbon cycle." Marine Geology 217(3-4): 323-338.

View more