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an intervention group

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HEALPix Discrete Global Grid System defined directly on the WGS84 ellipsoid, with cell boundaries, neighbour relations, and coordinate transformations computed under ellipsoidal geometry (as implemented in the healpix-geo Python package).

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The HEALPix family of DGGS — HEALPix on the sphere, HEALPix on the WGS84 ellipsoid via authalic-sphere mapping (Ellipsoidal HEALPix / healpix-geo / GRID4EARTH), and rHEALPix (the cube-projected equal-area variant).

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Sphere-aware machine learning — feature extraction and detection that operate directly on a HEALPix-NESTED substrate, exploiting rotation equivariance on the sphere.

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Wave conditions at storm landfall were reconstructed using the Copernicus Marine WAVERYS global wave reanalysis (GLOBAL_MULTIYEAR_WAV_001_032). WAVERYS is based on the MFWAM spectral wave model, forced by ERA5 winds and constrained by altimeter and Sentinel-1 SAR observations, on a 0.2° global grid at 3-hourly resolution. The methodological choice was to derive wave fields from a globally consistent model and aggregate results to each site polygon.

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Storing array data and its associated metadata in a single transactional store (Icechunk), so that data and metadata updates are committed atomically.

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A deep-learning nucleus/boundary-segmentation model from the BioImage Model Zoo, originally trained on fluorescence-microscopy images of cell nuclei, applied without retraining to the satellite imagery through a Galaxy BioImage.IO inference workflow — i.e. a cross-discipline transfer of a bioimaging segmentation model to remote sensing.

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The CellProfiler object-tracking pipeline (IdentifyPrimaryObjects + MeasureObjectSizeShape + TrackObjects) segments and tracks dividing cell nuclei in fluorescence time-lapse microscopy, applied to the IVT fields through a Galaxy workflow. It is a cross-discipline transfer of a bioimaging tracker to Earth-system science. Atmospheric rivers are identified using the established Guan & Waliser (2015) criteria (IVT threshold, length, length/width ratio, poleward flux).

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Angular power spectrum analysis performed on an equal-area HEALPix tessellation of the sphere defined on the WGS84 ellipsoid.