Ocean-Nitrogen-Isotopes-Box-Models

Prognostic multi-box (5 and 9) ocean model to constrain the systematics of N isotopes at global scale

The model is run on MATLAB.

Reference: Fripiat, F., D.M. Sigman, A. Martínez-García, D. Marconi, X.E. Ai, A. Auderset, S.E. Fawcett, S. Moretti, A.S. Studer and G.H. Haug (2023). The impact of incomplete nutrient consumption in the Southern Ocean on global mean ocean nitrate δ15N. Accepted in Global Biogeochemical Cycles.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

FILE DESCRIPTION for the five-box model:

• fiveboxoceanisotopesmaintemplate.m : master file for the five-box model which is run with one given set of parameters.
• fiveboxoceanisotopesode.m : ODE solver for the "fiveboxoceanisotopesmain_template.m"
• fiveboxoceanisotopesmaintemplate_sensitivity.m : master file for the sensitivity experiments for the five-box model
• fiveboxoceanisotopessensitivityode.m : ODE solver for the "fiveboxoceanisotopesmaintemplate_sensitivity.m"
• fiveboxsensitivitygeneration.m : script to generate the "sensitivity" matrix being used in "fiveboxoceanisotopesmaintemplate_sensitivity.m"

HOW TO for the five-box model which is run with one given set of parameters: - to set the model parameters in "fiveboxoceanisotopesode.m" - to run "fiveboxoceanisotopesmain_template.m"

HOW TO for the five-box model with the sensitivity experiments: - to run "fiveboxsensitivitygeneration.m" to generate the "sensitivity" matrix by randomly varying parameters over a range well beyond literature estimates (see table 1 in the reference manuscript) - to run "fiveboxoceanisotopesmaintemplate_sensitivity.m"

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

FILE DESCRIPTION for the nine-box model:

• nineboxoceanisotopesmaintemplate.m : master file for the nine-box model which is run with one given set of parameters.
• nineboxoceanisotopesode.m : ODE solver for the "nineboxoceanisotopesmain_template.m"
• nineboxoceanisotopesmaintemplate_sensitivity.m : master file for the sensitivity experiments for the nine-box model
• nineboxoceanisotopessensitivityode.m : ODE solver for the "nineboxoceanisotopesmaintemplate_sensitivity.m"
• nineboxsensitivitygeneration.m : script to generate the "sensitivity" matrix being used in "nineboxoceanisotopesmaintemplate_sensitivity.m"

HOW TO for the nine-box model which is run with one given set of parameters: - to set the model parameters in "nineboxoceanisotopesode.m" - to run "nineboxoceanisotopesmain_template.m"

HOW TO for the nine-box model with the sensitivity experiments: - to run "nineboxsensitivitygeneration.m" to generate the "sensitivity" matrix by randomly varying parameters over a range well beyond literature estimates (see table 1 in the reference manuscript) - to run "nineboxoceanisotopesmaintemplate_sensitivity.m"