FlowSieve: A Coarse-Graining Utility for Geophysical Flows on the Sphere ...

• Main Authors: Storer, Benjamin Aaron, Aluie, Hussein
• Format: Article in Journal/Newspaper
• Language: English
• Published: Zenodo 2023
• Subjects: coarse-graining; oceanography; scale decomposition; fluid dynamics; North Atlantic
• Online Access: https://dx.doi.org/10.5281/zenodo.7818191; https://zenodo.org/record/7818191

The core features of `FlowSieve` are: 1) computes coarse-grained scalar and vector fields for arbitrary filter scales, in both Cartesian and spherical coordinates, 2) built-in diagnostics for oceanographic settings, including kinetic energy (KE), KE cascades, vorticity, divergence, etc., 3) built-in post-processing tools compute region averages for an arbitrary number of custom user-specified regions [ avoiding storage concerns when handling large datasets ], and 4) includes Helmholtz-decomposition scripts to allow careful coarse-graining on the sphere [ i.e. to maintain commutativity with derivatives ]. `FlowSieve` is written in C++, with some user-friendly Python scripts included. Input and output files are netCDF. `FlowSieve` is designed with heavy parallelization in mind, as well as several context-based optimizations, in order to facilitate processing high-resolution datasets. In particular, MPI is used to divide time and depth [ with minimal communication costs, since coarse-graining is applied at each ... : {"references": ["Aluie, H. (2019). Convolutions on the sphere: commutation with differential operators. GEM - International Journal on Geomathematics, 10(1), 9. , 9. https://doi.org/10.1007/s13137- 019- 0123- 9", "Aluie, H., Hecht, M., & Vallis, G. K. (2018). Mapping the Energy Cascade in the North Atlantic Ocean: The Coarse-graining Approach. Journal of Physical Oceanography, 48, 225\u2013244. https://doi.org/10.1175/JPO-D-17-0100.1", "Balwada, D., Xie, J.-H., Marino, R., & Feraco, F. (2022). Direct observational evidence of an oceanic dual kinetic energy cascade and its seasonality. http://arxiv.org/abs/2202.08637", "Frisch, U. (1995). Turbulence: The Legacy of A.N. Kolmogorov. Cambridge University Press. https://doi.org/10.1017/CBO9781139170666", "Grooms, I., Loose, N., Abernathey, R., Steinberg, J. M., Bachman, S. D., Marques, G., Guillaumin, A. P., & Yankovsky, E. (2021). Diffusion-Based Smoothers for Spatial Filtering of Gridded Geophysical Data. Journal of Advances in Modeling Earth ...