{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:11.802521", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2025-Oct-01_to_2025-Oct-07_35.5_4.0"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2025100000043}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "October 01 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 07 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 61687.91759895276}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Kenya", "South Sudan", "Uganda"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "Africa", "Africa"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 4.0}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 35.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "35.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 34.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 36.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 2.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 6.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[34.25, 4.65], [34.38, 4.7], [34.25, 5.0], [34.35, 5.25], [34.25, 5.5], [34.35, 5.75], [34.25, 6.0], [34.47, 6.53], [35.0, 6.75], [35.53, 6.53], [35.75, 6.0], [35.65, 5.75], [35.68, 5.68], [36.03, 5.53], [36.25, 5.0], [36.15, 4.75], [36.25, 4.5], [36.15, 4.25], [36.25, 4.0], [36.15, 3.75], [36.18, 3.68], [36.25, 3.65], [36.5, 3.75], [37.03, 3.53], [37.25, 3.0], [37.15, 2.75], [37.25, 2.5], [37.15, 2.25], [37.25, 2.0], [37.03, 1.47], [36.5, 1.25], [36.25, 1.35], [36.0, 1.25], [35.47, 1.47], [35.32, 1.82], [34.97, 1.97], [34.82, 2.32], [34.47, 2.47], [34.3, 2.88], [34.0, 2.75], [33.47, 2.97], [33.25, 3.5], [33.35, 3.75], [33.25, 4.0], [33.47, 4.53], [34.0, 4.75], [34.25, 4.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa", "S.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.25, 4.0], [33.47, 4.53], [34.0, 4.75], [34.53, 4.53], [34.75, 4.0], [34.65, 3.75], [34.75, 3.5], [34.53, 2.97], [34.0, 2.75], [33.47, 2.97], [33.25, 3.5], [33.35, 3.75], [33.25, 4.0]]]]}, "2025-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.25, 4.0], [33.47, 4.53], [34.0, 4.75], [34.53, 4.53], [34.75, 4.0], [34.65, 3.75], [34.7, 3.62], [35.0, 3.75], [35.53, 3.53], [35.75, 3.0], [35.57, 2.57], [36.0, 2.75], [36.53, 2.53], [36.75, 2.0], [36.53, 1.47], [36.0, 1.25], [35.47, 1.47], [35.25, 2.0], [35.43, 2.43], [35.0, 2.25], [34.47, 2.47], [34.3, 2.88], [34.0, 2.75], [33.47, 2.97], [33.25, 3.5], [33.35, 3.75], [33.25, 4.0]]]]}, "2025-10-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.25, 4.0], [33.47, 4.53], [34.0, 4.75], [34.25, 4.65], [34.38, 4.7], [34.25, 5.0], [34.35, 5.25], [34.25, 5.5], [34.35, 5.75], [34.25, 6.0], [34.47, 6.53], [35.0, 6.75], [35.53, 6.53], [35.75, 6.0], [35.65, 5.75], [35.68, 5.68], [36.03, 5.53], [36.25, 5.0], [36.15, 4.75], [36.25, 4.5], [36.15, 4.25], [36.25, 4.0], [36.15, 3.75], [36.18, 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"Maximum t2m anomaly recorded over entire duration", "value": -4.714314886417583}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.7077014241279156}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.649953460693382, 23.435777282714866, 24.885509999593125, 26.865235477023703, 26.97518409446434, 26.910177697075767, 28.372164662679097]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.688202158610068, 19.31745045979818, 18.978564198811853, 22.110217030843103, 22.523013051350915, 22.631518300374353, 27.24626948038741]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.872749951330917, -1.9818812054054291, -3.8042154153001433, -2.5316409794593855, -2.4435782590399304, -2.3119453171296747, -1.5365219882868075]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.162322156685036, -2.314357281557818, -4.714314886417583, -3.319347396953731, -3.666280578895453, -3.2413005122525647, -2.1588209748168197]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4541491766392989, -1.5790539941023933, -3.3884129049317373, -2.2166658056657713, -2.089780437567533, -1.954003110594761, -1.3799917443288328]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.524047644696233, -1.700604655173303, -5.454827048849262, -3.5692995286450073, -3.4621207153346307, -3.2051596222100502, -1.5984806487205823]}}