{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:33.692080", "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-14_to_2025-Dec-19_46.5_-12.5"}, "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": 2025120001913}, "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 14 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 19 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 63406.44762667477}, "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": ["Madagascar"]}, "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": -12.5}, "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": 46.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "46.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 45.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 48.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -13.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -11.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[44.47, -11.97], [45.0, -11.75], [45.25, -11.85], [45.32, -11.82], [45.47, -11.47], [45.82, -11.32], [45.97, -10.97], [46.5, -10.75], [46.75, -10.85], [47.0, -10.75], [47.25, -10.85], [47.5, -10.75], [48.03, -10.97], [48.18, -11.32], [48.53, -11.47], [48.68, -11.82], [49.03, -11.97], [49.25, -12.5], [49.15, -12.75], [49.25, -13.0], [49.03, -13.53], [48.5, -13.75], [48.25, -13.65], [48.0, -13.75], [47.75, -13.65], [47.5, -13.75], [47.25, -13.65], [47.0, -13.75], [46.75, -13.65], [46.5, -13.75], [45.97, -13.53], [45.82, -13.18], [45.75, -13.15], [45.5, -13.25], [45.25, -13.15], [45.0, -13.25], [44.47, -13.03], [44.25, -12.5], [44.47, -11.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa", "Madagascar"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.47, -11.47], [46.0, -11.25], [46.53, -11.47], [46.68, -11.82], [47.03, -11.97], [47.25, -12.5], [47.03, -13.03], [46.5, -13.25], [46.25, -13.15], [46.0, -13.25], [45.47, -13.03], [45.25, -12.5], [45.35, -12.25], [45.25, -12.0], [45.47, -11.47]]], [[[48.0, -12.75], [47.47, -12.53], [47.25, -12.0], [47.47, -11.47], [48.0, -11.25], [48.53, -11.47], [48.75, -12.0], [48.53, -12.53], [48.0, -12.75]]]]}, "2025-12-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.25, -12.0], [45.47, -11.47], [45.82, -11.32], [45.97, -10.97], [46.5, -10.75], [46.75, -10.85], [47.0, -10.75], [47.25, -10.85], [47.5, -10.75], [48.03, -10.97], [48.18, -11.32], [48.53, -11.47], [48.68, -11.82], [49.03, -11.97], [49.25, -12.5], [49.15, -12.75], [49.25, -13.0], [49.03, -13.53], [48.5, -13.75], [48.25, -13.65], [48.0, -13.75], [47.75, -13.65], [47.5, -13.75], [46.97, -13.53], [46.82, -13.18], [46.75, -13.15], [46.5, -13.25], [46.25, -13.15], [46.0, -13.25], [45.47, -13.03], [45.25, -12.5], [45.35, -12.25], [45.25, -12.0]]]]}, "2025-12-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.0, -13.25], [44.47, -13.03], [44.25, -12.5], [44.47, -11.97], [45.0, -11.75], [45.25, -11.85], [45.32, -11.82], [45.47, -11.47], [45.82, -11.32], [45.97, -10.97], [46.5, -10.75], [46.75, -10.85], [47.0, -10.75], [47.25, -10.85], [47.5, -10.75], [48.03, -10.97], [48.18, -11.32], [48.53, -11.47], [48.68, -11.82], [49.03, -11.97], [49.25, -12.5], [49.15, -12.75], [49.25, -13.0], [49.03, -13.53], [48.5, -13.75], [48.25, -13.65], [48.0, -13.75], [47.75, -13.65], [47.5, -13.75], [47.25, -13.65], [47.0, -13.75], [46.75, -13.65], [46.5, -13.75], [45.97, -13.53], [45.82, -13.18], [45.75, -13.15], [45.5, -13.25], [45.25, -13.15], [45.0, -13.25]]]]}, "2025-12-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.0, -13.25], [44.47, -13.03], [44.25, -12.5], [44.47, -11.97], [45.0, -11.75], [45.25, -11.85], [45.32, -11.82], [45.47, -11.47], [45.82, -11.32], [45.97, -10.97], [46.5, -10.75], [46.75, -10.85], [47.0, -10.75], [47.25, -10.85], [47.5, -10.75], [48.03, -10.97], [48.18, -11.32], [48.53, -11.47], [48.68, -11.82], [49.03, -11.97], [49.25, -12.5], [49.15, -12.75], [49.25, -13.0], [49.03, -13.53], [48.5, -13.75], [48.25, -13.65], [48.0, -13.75], [47.75, -13.65], [47.5, -13.75], [47.25, -13.65], [47.0, -13.75], [46.75, -13.65], [46.5, -13.75], [45.97, -13.53], [45.82, -13.18], [45.75, -13.15], [45.5, -13.25], [45.25, -13.15], [45.0, -13.25]]]]}, "2025-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.0, -13.25], [44.47, -13.03], [44.25, -12.5], [44.47, -11.97], [45.0, -11.75], [45.25, -11.85], [45.5, -11.75], [45.75, -11.85], [46.0, -11.75], [46.25, -11.85], [46.5, -11.75], [46.75, -11.85], [47.0, -11.75], [47.53, -11.97], [47.68, -12.32], [47.75, -12.35], [48.0, -12.25], [48.25, -12.35], [48.5, -12.25], [49.03, -12.47], [49.25, -13.0], [49.03, -13.53], [48.5, -13.75], [48.25, -13.65], [48.0, -13.75], [47.75, -13.65], [47.5, -13.75], [47.25, -13.65], [47.0, -13.75], [46.75, -13.65], [46.5, -13.75], [45.97, -13.53], [45.82, -13.18], [45.75, -13.15], [45.5, -13.25], [45.25, -13.15], [45.0, -13.25]]]]}, "2025-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.0, -13.25], [44.47, -13.03], [44.25, -12.5], [44.47, -11.97], [45.0, -11.75], [45.25, -11.85], [45.5, -11.75], [45.75, -11.85], [46.0, -11.75], [46.25, -11.85], [46.5, -11.75], [46.75, -11.85], [47.0, -11.75], [47.53, -11.97], [47.68, -12.32], [48.03, -12.47], [48.25, -13.0], [48.03, -13.53], [47.5, -13.75], [47.25, -13.65], [47.0, -13.75], [46.75, -13.65], [46.5, -13.75], [45.97, -13.53], [45.82, -13.18], [45.75, -13.15], [45.5, -13.25], [45.25, -13.15], [45.0, -13.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 1.3216306952368768}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 0.8459288053724424}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.596369679768884, 27.577644602457724, 27.860573493109882, 27.739380197676383, 27.665710194905614, 27.860987599690816]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.83884201049807, 27.724047597249353, 28.24278920491537, 28.101192728678427, 27.863960520426474, 28.00320968627932]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [0.7125499989308253, 0.7410641202528054, 0.98315727332589, 0.8550885521024887, 0.7274693090855067, 0.8992609712869779]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [0.8908348539944768, 0.9078011073798393, 1.3216306952368768, 1.2180439126937586, 0.9024033067929622, 0.9695813296187907]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4381434227257555, 1.531276704853136, 1.933466045206977, 1.6759613246780618, 1.4065444676751744, 1.704405047312702]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.699615110955423, 2.0084382706112947, 2.777433339585404, 2.505470557677465, 1.8499619661901574, 1.8502600335591948]}}