scai

typhon.cloudmask.scai(cloudmask, connectivity=1)[source]

Calculate the ‘Simple Convective Aggregation Index (SCAI)’.

The SCAI is defined as the ratio of convective disaggregation to a potential maximal disaggregation.

See also

scipy.spatial.distance.pdist():

Used to calculate pairwise distances between cloud entities.

scipy.stats.mstats.gmean():

Used to calculate the geometric mean of all clouds in pairs.

Parameters:

  • cloudmask (ndarray) – 2d binary cloud mask.

  • connectivity (int) – Maximum number of orthogonal hops to consider a pixel/voxel as a neighbor (see skimage.measure.label()).

Returns:

SCAI.

Return type:

float

References

Tobin, I., S. Bony, and R. Roca, 2012: Observational Evidence for Relationships between the Degree of Aggregation of Deep Convection, Water Vapor, Surface Fluxes, and Radiation. J. Climate, 25, 6885–6904, https://doi.org/10.1175/JCLI-D-11-00258.1