Prediction of Effective Angular Momentum (EAM) functions
Introduction to the methods
The specifications of the methods that are currently
operational are mentioned in the following table.
Each component of EAM is analyzed separately. Predictions are made for mass terms (χ1,p, χ2,p, χ3,p) and motion terms (χ1,w, χ2,w, χ3,w). The EAM components that are predicted are as follows
| EAM type | Description | Predicted terms |
|---|---|---|
| AAM | Atmospheric Angular Momentum | mass and motion |
| HAM | Hydrological Angular Momentum | mass and motion |
| OAM | Oceanic Angular Momentum | mass and motion |
| SLAM | Sea-Level Angular Momentum | mass |
Acknowledgements
The data sources used in the current framework are taken GFZ German Research Centre for Geosciences, section Earth System Modelling (ESMGFZ). The original data can be accessed here.
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Methods description
| Method | Input EAM | Algorithm | Forecasting horizon (days) | Comments |
|---|---|---|---|---|
| fonode-GFZ-14d-AAM | GFZ AAM mass terms (χ1,p, χ2,p, χ3,p) and motion terms (χ1,w, χ2,w, χ3,w) | First order neural oridinary differential equations | 14 | 6 models in total. One model for each term (mass and motion) |
| fonode-GFZ-14d-HAM | GFZ HAM mass terms (χ1,p, χ2,p, χ3,p) and motion terms (χ1,w, χ2,w, χ3,w) | First order neural oridinary differential equations | 14 | 6 models in total. One model for each term (mass and motion) |
| fonode-GFZ-14d-OAM | GFZ OAM mass terms (χ1,p, χ2,p, χ3,p) and motion terms (χ1,w, χ2,w, χ3,w) | First order neural oridinary differential equations | 14 | 6 models in total. One model for each term (mass and motion) |
| fonode-GFZ-14d-SLAM | GFZ SLAM mass terms (χ1,p, χ2,p, χ3,p) | First order neural oridinary differential equations | 14 | 3 models in total. One model for each term (mass) |
| GFZ-6d-AAM | GFZ AAM mass terms (χ1,p, χ2,p, χ3,p) and motion terms (χ1,w, χ2,w, χ3,w) | 6 | ||
| GFZ-6d-HAM | GFZ HAM mass terms (χ1,p, χ2,p, χ3,p) and motion terms (χ1,w, χ2,w, χ3,w) | 6 | ||
| GFZ-6d-OAM | GFZ OAM mass terms (χ1,p, χ2,p, χ3,p) and motion terms (χ1,w, χ2,w, χ3,w) | 6 | ||
| GFZ-6d-SLAM | GFZ SLAM mass terms (χ1,p, χ2,p, χ3,p) | 6 |