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S-SOM v1.0: a structural self-organizing map algorithm for weather typing

Supporting Files


Details

  • Journal Title:
    Geoscientific Model Development
  • Personal Author:
  • NOAA Program & Office:
    OAR (Oceanic and Atmospheric Research)
  • Description:
    This study proposes a novel structural self-organizing map (S-SOM) algorithm for synoptic weather typing. A novel feature of the S-SOM compared with traditional SOMs is its ability to deal with input data with spatial or temporal structures. In detail, the search scheme for the best matching unit (BMU) in a S-SOM is built based on a structural similarity (S-SIM) index rather than by using the traditional Euclidean distance (ED). S-SIM enables the BMU search to consider the correlation in space between weather states, such as the locations of highs or lows, that is impossible when using ED. The S-SOM performance is evaluated by multiple demo simulations of clustering weather patterns over Japan using the ERA-Interim sea-level pressure data. The results show the S-SOM's superiority compared with a standard SOM with ED (or ED-SOM) in two respects: clustering quality based on silhouette analysis and topological preservation based on topological error. Better performance of S-SOM versus ED is consistent with results from different tests and node-size configurations. S-SOM performs better than a SOM using the Pearson correlation coefficient (or COR-SOM), though the difference is not as clear as it is compared to ED-SOM.
  • Source:
    Geoscientific Model Development, 14(4), 2097-2111
  • DOI:
  • ISSN:
    1991-9603
  • Format:
    PDF
  • Publisher:
    Copernicus GmbH
  • Document Type:
    Journal Article
  • Funding:
    Grant no. NA18OAR4590398
  • License:
  • Rights Information:
    CC BY
  • Compliance:
    Library
  • Main Document Checksum:
    urn:sha-512:182f8d23817e9d89ea58923851c952a3d8eb887c391f4689aff5c3553ee2b66a4f67527ee966a9d796aedde3d57d7bc0e5cd49c6cfc1b90135dd178917414222
  • Download URL:
  • File Type:
    Filetype[PDF - 4.27 MB ]
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