Spectral EOF (SEOF) of weather and climate data
The scripts contained in this contribution compute the spectral empirical orthogonal function (SEOF) decomposition of reanalysis data. The examples include the weather and climate patterns discussed in reference [1], namely the Madden-Julian Oscillation (MJO), the Quasi-Biennial Oscillation (QBO), and the El Nino-Southern Oscillation (ENSO). These patterns are educed from ERA-Interim and ERA-20C data that must be downloaded separately. The corresponding Python scripts are located in the 'data/EI' (ERA-Interim) and 'data/E20C' (ERA 20C) folders. Please refer to https://confluence.ecmwf.int/display/WEBAPI/Access+ECMWF+Public+Datasets for details on how to set up an account with ECMWF and download their public datasets. The core routine spod() that performs the SEOF decomposition (SPOD in fields in which empirical orthogonal function analysis is known as proper orthogonal decomposition) is located in the 'utils' folder. The most recent version and more information and examples can be found under https://www.mathworks.com/matlabcentral/fileexchange/65683-spectral-proper-orthogonal-decomposition-spod.
引用
[1] O. T. Schmidt, G. Mengaldo, G. Balsamo and N. P. Wedi (2019) "Spectral Empirical Orthogonal Function analysis of weather and climate data", Monthly Weather Review, 147 (8), 2979-2995, DOI: 10.1175/MWR-D-18-0337.1
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