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Title: Final technical report DOE award DE-SC0007206 Improving CESM Efficiency to Study Variable C:N:P Stoichiometry in the Oceans

This report lists the accomplishments of the project, which includes: (1) analysis of inorganic nutrient concentration data as well as suspended particulate organic matter data in the ocean to demonstrate that the carbon to nitrogen to phosphorus ratios (C:N:P) of biological uptake and export vary on large spatial scales, (2) the development of a new computationally efficient method for simulating biogeochemical tracers in earth system models, (3) the application of the method to help calibrate an improved representation of dissolved organic matter in the ocean that includes variable C:N:P stoichiometry. This research is important because biological uptake of carbon and nutrients in the upper ocean and export by sinking particles and downward mixing of dissolved organic matter helps maintain a vertical gradient in the carbon dioxide concentration in the ocean. This gradient is key to understanding the partitioning of CO2 between the ocean and the atmosphere. The final report lists seven peer reviewed scientific publications, one Ph.D. thesis, one technical report and two papers in preparation.
  1. Univ. of California, Irvine, CA (United States)
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Resource Type:
Technical Report
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Related Information: [1] Martiny, A.C., C.T.A. Pham, F.W. Primeau, J.A. Vrugt, J.K. Moore, S.A. Levin, and M.W. Lomas 2013: Strong latitudinal patterns in the elemental ratios of mainre plankton and organic matter. Nature Geoscience, 6, 279-283.[2] Martiny, A.C., J. A. Vrugt, F. W. Primeau, and M. W. Lomas 2013: Regional variation in the particulate organic carbon to nitrogen ratio in the surface ocean. Global Biogeochemical Cycles, 27, 723-731, doi:10.1002/gbc.20061.[3] Teng, Y.-C., F.W. Primeau, J.K. Moore, M. W. Lomas, and A.C. Martiny 2014: Global-scale variations of the ratios of carbon to phosphorus in exported marine organic matter. Nature Geoscience, 7, 895-898.[4] Bardin, A., 2014: Novel Analysis Tools for Ocean Biogeochemical Models. PhD. Dissertation, Department of Earth System Science, University of California, Irvine[5] Bardin, A., F. Primeau, and Keith Lindsay 2014: An offline implicit solver for simulating prebomb radiocarbon. Ocean Modelling 73, 45-58[6] Letscher, R. T., J.K. Moore, Y.-C. Teng, and F. Primeau 2015: Variable C:N:P stoichiometry of dissolved organic matter cycling in the Community Earth System Model. Biogeosciences, 12, 209-221.[7] Letscher, R, and J. K. Moore, 2014: Preferential remineralization of dissolved organic phosphorus and non-Redfield DOM dynamics in the global ocean: Impacts on marine productivity, nitrogen fixation, and carbon export. Global Biogeochemical Cycles, 10.1002/2014GB004904.[8] Bardin, A., 2015: Building Offline Transport Operators for CESM POP version 1.2. University of California, Irvine, Earth System Science Technical Report. [9] Bardin, Ann, F. Primeau, and Keith Lindsay, Evaluation of the accuracy of an offline seasonally-varying matrix transport model for simulating ideal age. (in prep.)[10] Letscher, R.T. , F. Primeau, and J. K. Moore, Lateral nutrient transport sustains ocean gyre productivity. (in prep.)
Research Org:
Univ. of California, Irvine, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Country of Publication:
United States
54 ENVIRONMENTAL SCIENCES; 58 GEOSCIENCES; ocean biogeochemistry; earth system modeling; fast numerical methods for simulating advection-diffusion; C:N:P stoichiometry of marine biological production