{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:39.750588", "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-Dec-28_to_2026-Jan-01_47.5_10.5"}, "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": 2025120002615}, "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": "December 28 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 01 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 66944.2664589077}, "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": ["Somalia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": ["Indian Ocean"]}, "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": 10.5}, "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": 47.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "47.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 46.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 50.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 9.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 11.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[45.47, 11.03], [46.0, 11.25], [46.25, 11.15], [46.5, 11.25], [46.75, 11.15], [47.0, 11.25], [47.25, 11.15], [47.5, 11.25], [47.75, 11.15], [48.0, 11.25], [48.25, 11.15], [48.5, 11.25], [48.75, 11.15], [48.82, 11.18], [48.97, 11.53], [49.5, 11.75], [49.75, 11.65], [50.0, 11.75], [50.53, 11.53], [50.75, 11.0], [50.63, 10.7], [51.03, 10.53], [51.25, 10.0], [51.03, 9.47], [50.68, 9.32], [50.53, 8.97], [50.0, 8.75], [49.75, 8.85], [49.68, 8.82], [49.53, 8.47], [49.0, 8.25], [48.47, 8.47], [48.32, 8.82], [48.25, 8.85], [48.0, 8.75], [47.47, 8.97], [47.25, 9.5], [47.35, 9.75], [47.32, 9.82], [47.25, 9.85], [47.0, 9.75], [46.75, 9.85], [46.5, 9.75], [46.25, 9.85], [46.0, 9.75], [45.47, 9.97], [45.25, 10.5], [45.47, 11.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.5, 9.75], [46.97, 9.97], [46.75, 10.5], [46.97, 11.03], [47.5, 11.25], [48.03, 11.03], [48.25, 10.5], [48.03, 9.97], [47.5, 9.75]]], [[[50.0, 10.25], [49.47, 10.47], [49.25, 11.0], [49.47, 11.53], [50.0, 11.75], [50.53, 11.53], [50.75, 11.0], [50.53, 10.47], [50.0, 10.25]]]]}, "2025-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.0, 9.75], [46.47, 9.97], [46.25, 10.5], [46.47, 11.03], [47.0, 11.25], [47.25, 11.15], [47.5, 11.25], [47.75, 11.15], [48.0, 11.25], [48.25, 11.15], [48.5, 11.25], [48.75, 11.15], [48.82, 11.18], [48.97, 11.53], [49.5, 11.75], [49.75, 11.65], [50.0, 11.75], [50.53, 11.53], [50.75, 11.0], [50.63, 10.7], [51.03, 10.53], [51.25, 10.0], [51.03, 9.47], [50.68, 9.32], [50.53, 8.97], [50.0, 8.75], [49.75, 8.85], [49.68, 8.82], [49.53, 8.47], [49.0, 8.25], [48.47, 8.47], [48.32, 8.82], [48.25, 8.85], [48.0, 8.75], [47.47, 8.97], [47.25, 9.5], [47.35, 9.75], [47.32, 9.82], [47.25, 9.85], [47.0, 9.75]]]]}, "2025-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.0, 9.75], [45.47, 9.97], [45.25, 10.5], [45.47, 11.03], [46.0, 11.25], [46.25, 11.15], [46.5, 11.25], [46.75, 11.15], [47.0, 11.25], [47.25, 11.15], [47.5, 11.25], [47.75, 11.15], [48.0, 11.25], [48.25, 11.15], [48.5, 11.25], [48.75, 11.15], [48.82, 11.18], [48.97, 11.53], [49.5, 11.75], [49.75, 11.65], [50.0, 11.75], [50.53, 11.53], [50.75, 11.0], [50.63, 10.7], [51.03, 10.53], [51.25, 10.0], [51.03, 9.47], [50.68, 9.32], [50.53, 8.97], [50.0, 8.75], [49.75, 8.85], [49.68, 8.82], [49.53, 8.47], [49.0, 8.25], [48.47, 8.47], [48.32, 8.82], [48.25, 8.85], [48.0, 8.75], [47.47, 8.97], [47.25, 9.5], [47.35, 9.75], [47.32, 9.82], [47.25, 9.85], [47.0, 9.75], [46.75, 9.85], [46.5, 9.75], [46.25, 9.85], [46.0, 9.75]]]]}, "2025-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.0, 9.75], [45.47, 9.97], [45.25, 10.5], [45.47, 11.03], [46.0, 11.25], [46.25, 11.15], [46.5, 11.25], [46.75, 11.15], [47.0, 11.25], [47.25, 11.15], [47.5, 11.25], [47.75, 11.15], [48.0, 11.25], [48.25, 11.15], [48.5, 11.25], [48.75, 11.15], [48.82, 11.18], [48.97, 11.53], [49.5, 11.75], [49.75, 11.65], [50.0, 11.75], [50.53, 11.53], [50.75, 11.0], [50.63, 10.7], [51.03, 10.53], [51.25, 10.0], [51.03, 9.47], [50.68, 9.32], [50.53, 8.97], [50.0, 8.75], [49.75, 8.85], [49.68, 8.82], [49.53, 8.47], [49.0, 8.25], [48.47, 8.47], [48.32, 8.82], [48.25, 8.85], [48.0, 8.75], [47.47, 8.97], [47.25, 9.5], [47.35, 9.75], [47.32, 9.82], [47.25, 9.85], [47.0, 9.75], [46.75, 9.85], [46.5, 9.75], [46.25, 9.85], [46.0, 9.75]]]]}, "2026-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.0, 9.75], [45.47, 9.97], [45.25, 10.5], [45.47, 11.03], [46.0, 11.25], [46.25, 11.15], [46.5, 11.25], [46.75, 11.15], [47.0, 11.25], [47.53, 11.03], [47.75, 10.5], [47.53, 9.97], [47.0, 9.75], [46.75, 9.85], [46.5, 9.75], [46.25, 9.85], [46.0, 9.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 3.444894731208592}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 2.1319503869436414}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.592697397867823, 22.11762797037767, 22.532002096465078, 21.9471961743904, 22.141876898871544]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.13802617390951, 23.251738484700525, 23.708445485432946, 23.48976542154952, 23.35571695963546]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.8064344826028957, 2.120203887599857, 2.438918275387054, 1.9019720232158503, 1.8626811375481414]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [1.9868388970721185, 3.0254682404664663, 3.444894731208592, 2.479641925366991, 1.9286300810787793]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.619087606031538, 2.143555544774133, 2.3503309793633007, 1.734046091373154, 1.7720738338601396]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.8525765540528392, 2.870713173617797, 3.1396098453254178, 2.0790634737482594, 1.926116461791783]}}