{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:32.887099", "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-13_to_2025-Dec-18_6.0_21.0"}, "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": 2025120001856}, "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 13 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 18 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": 133913.1357532741}, "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": ["Algeria", "Mali", "Niger"]}, "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": 21.0}, "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": 6.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "6.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 3.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 7.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 18.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 21.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[5.0, 21.75], [5.25, 21.65], [5.5, 21.75], [5.75, 21.65], [6.0, 21.75], [6.25, 21.65], [6.32, 21.68], [6.47, 22.03], [7.0, 22.25], [7.25, 22.15], [7.5, 22.25], [8.03, 22.03], [8.25, 21.5], [8.15, 21.25], [8.25, 21.0], [8.04, 20.5], [8.25, 20.0], [8.15, 19.75], [8.25, 19.5], [8.03, 18.97], [7.5, 18.75], [7.25, 18.85], [7.13, 18.8], [7.25, 18.5], [7.03, 17.97], [6.68, 17.82], [6.53, 17.47], [6.0, 17.25], [5.75, 17.35], [5.5, 17.25], [5.25, 17.35], [5.0, 17.25], [4.5, 17.46], [4.0, 17.25], [3.75, 17.35], [3.5, 17.25], [2.97, 17.47], [2.75, 18.0], [2.85, 18.25], [2.75, 18.5], [2.97, 19.03], [3.32, 19.18], [3.35, 19.25], [3.25, 19.5], [3.47, 20.03], [3.82, 20.18], [3.85, 20.25], [3.75, 20.5], [3.97, 21.03], [4.32, 21.18], [4.47, 21.53], [5.0, 21.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.75, 20.0], [3.97, 20.53], [4.32, 20.68], [4.35, 20.75], [4.25, 21.0], [4.47, 21.53], [5.0, 21.75], [5.5, 21.54], [6.0, 21.75], [6.53, 21.53], [6.75, 21.0], [6.53, 20.47], [6.0, 20.25], [5.7, 20.38], [5.53, 19.97], [5.18, 19.82], [5.03, 19.47], [4.63, 19.3], [4.75, 19.0], [4.57, 18.57], [5.0, 18.75], [5.25, 18.65], [5.32, 18.68], [5.35, 18.75], [5.25, 19.0], [5.47, 19.53], [6.0, 19.75], [6.53, 19.53], [6.68, 19.18], [7.03, 19.03], [7.25, 18.5], [7.03, 17.97], [6.68, 17.82], [6.53, 17.47], [6.0, 17.25], [5.75, 17.35], [5.5, 17.25], [5.25, 17.35], [5.0, 17.25], [4.47, 17.47], [4.25, 18.0], [4.43, 18.43], [4.0, 18.25], [3.47, 18.47], [3.25, 19.0], [3.47, 19.53], [3.88, 19.7], [3.75, 20.0]]]]}, "2025-12-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.25, 18.5], [3.35, 18.75], [3.25, 19.0], [3.35, 19.25], [3.25, 19.5], [3.47, 20.03], [3.82, 20.18], [3.85, 20.25], [3.75, 20.5], [3.97, 21.03], [4.32, 21.18], [4.47, 21.53], [5.0, 21.75], [5.25, 21.65], [5.5, 21.75], [5.75, 21.65], [6.0, 21.75], [6.25, 21.65], [6.32, 21.68], [6.47, 22.03], [7.0, 22.25], [7.25, 22.15], [7.5, 22.25], [8.03, 22.03], [8.25, 21.5], [8.15, 21.25], [8.25, 21.0], [8.04, 20.5], [8.25, 20.0], [8.15, 19.75], [8.25, 19.5], [8.03, 18.97], [7.5, 18.75], [7.25, 18.85], [7.13, 18.8], [7.25, 18.5], [7.03, 17.97], [6.68, 17.82], [6.53, 17.47], [6.0, 17.25], [5.75, 17.35], [5.5, 17.25], [5.25, 17.35], [5.0, 17.25], [4.5, 17.46], [4.0, 17.25], [3.47, 17.47], [3.25, 18.0], [3.35, 18.25], [3.25, 18.5]]]]}, "2025-12-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.25, 18.5], [3.35, 18.75], [3.25, 19.0], [3.35, 19.25], [3.25, 19.5], [3.47, 20.03], [3.82, 20.18], [3.85, 20.25], [3.75, 20.5], [3.97, 21.03], [4.32, 21.18], [4.47, 21.53], [5.0, 21.75], [5.25, 21.65], [5.5, 21.75], [5.75, 21.65], [6.0, 21.75], [6.25, 21.65], [6.32, 21.68], [6.47, 22.03], [7.0, 22.25], [7.25, 22.15], [7.5, 22.25], [8.03, 22.03], [8.25, 21.5], [8.15, 21.25], [8.25, 21.0], [8.04, 20.5], [8.25, 20.0], [8.15, 19.75], [8.25, 19.5], [8.03, 18.97], [7.5, 18.75], [7.25, 18.85], [7.13, 18.8], [7.25, 18.5], [7.03, 17.97], [6.68, 17.82], [6.53, 17.47], [6.0, 17.25], [5.75, 17.35], [5.5, 17.25], [5.25, 17.35], [5.0, 17.25], [4.5, 17.46], [4.0, 17.25], [3.47, 17.47], [3.25, 18.0], [3.35, 18.25], [3.25, 18.5]]]]}, "2025-12-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.75, 18.5], [2.97, 19.03], [3.32, 19.18], [3.35, 19.25], [3.25, 19.5], [3.47, 20.03], [3.82, 20.18], [3.85, 20.25], [3.75, 20.5], [3.97, 21.03], [4.32, 21.18], [4.47, 21.53], [5.0, 21.75], [5.25, 21.65], [5.5, 21.75], [5.75, 21.65], [6.0, 21.75], [6.25, 21.65], [6.32, 21.68], [6.47, 22.03], [7.0, 22.25], [7.25, 22.15], [7.5, 22.25], [8.03, 22.03], [8.25, 21.5], [8.15, 21.25], [8.25, 21.0], [8.04, 20.5], [8.25, 20.0], [8.15, 19.75], [8.25, 19.5], [8.03, 18.97], [7.5, 18.75], [7.25, 18.85], [7.13, 18.8], [7.25, 18.5], [7.03, 17.97], [6.5, 17.75], [6.25, 17.85], [6.18, 17.82], [6.03, 17.47], [5.5, 17.25], [5.25, 17.35], [5.0, 17.25], [4.5, 17.46], [4.0, 17.25], [3.75, 17.35], [3.5, 17.25], [2.97, 17.47], [2.75, 18.0], [2.85, 18.25], [2.75, 18.5]]]]}, "2025-12-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.75, 18.5], [2.97, 19.03], [3.32, 19.18], [3.35, 19.25], [3.25, 19.5], [3.47, 20.03], [3.82, 20.18], [3.85, 20.25], [3.75, 20.5], [3.97, 21.03], [4.32, 21.18], [4.47, 21.53], [5.0, 21.75], [5.25, 21.65], [5.5, 21.75], [5.75, 21.65], [6.0, 21.75], [6.25, 21.65], [6.32, 21.68], [6.47, 22.03], [7.0, 22.25], [7.25, 22.15], [7.5, 22.25], [8.03, 22.03], [8.25, 21.5], [8.15, 21.25], [8.25, 21.0], [8.03, 20.47], [7.68, 20.32], [7.65, 20.25], [7.75, 20.0], [7.65, 19.75], [7.75, 19.5], [7.53, 18.97], [7.13, 18.8], [7.25, 18.5], [7.03, 17.97], [6.5, 17.75], [6.25, 17.85], [6.18, 17.82], [6.03, 17.47], [5.5, 17.25], [5.25, 17.35], [5.0, 17.25], [4.5, 17.46], [4.0, 17.25], [3.75, 17.35], [3.5, 17.25], [2.97, 17.47], [2.75, 18.0], [2.85, 18.25], [2.75, 18.5]]]]}, "2025-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.75, 18.5], [2.97, 19.03], [3.32, 19.18], [3.35, 19.25], [3.25, 19.5], [3.47, 20.03], [3.82, 20.18], [3.85, 20.25], [3.75, 20.5], [3.97, 21.03], [4.32, 21.18], [4.47, 21.53], [5.0, 21.75], [5.25, 21.65], [5.5, 21.75], [5.75, 21.65], [6.0, 21.75], [6.25, 21.65], [6.32, 21.68], [6.47, 22.03], [7.0, 22.25], [7.25, 22.15], [7.5, 22.25], [8.03, 22.03], [8.25, 21.5], [8.15, 21.25], [8.25, 21.0], [8.03, 20.47], [7.68, 20.32], [7.53, 19.97], [7.18, 19.82], [7.15, 19.75], [7.25, 19.5], [7.03, 18.97], [6.68, 18.82], [6.53, 18.47], [6.18, 18.32], [6.03, 17.97], [5.5, 17.75], [5.25, 17.85], [5.0, 17.75], [4.75, 17.85], [4.68, 17.82], [4.53, 17.47], [4.0, 17.25], [3.75, 17.35], [3.5, 17.25], [2.97, 17.47], [2.75, 18.0], [2.85, 18.25], [2.75, 18.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 6.29963320626257}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 4.495848211479444}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.833518542665445, 24.024985042838182, 23.667348302796825, 23.215801719383023, 23.4853073120118, 22.793027771271056]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.073486582438193, 26.349258677164755, 25.672533925374353, 25.26630808512374, 25.745398457845056, 24.71340713500979]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.070437740744823, 4.8931262750540006, 4.627132495458324, 4.211234960172189, 4.6001578994598225, 4.232972913072771]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.493100751783004, 6.29963320626257, 5.503599589066539, 4.925240696688206, 5.137964565880054, 4.993357565613678]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.5209723124954266, 1.821905341170739, 1.7613580222542162, 1.6132074045286076, 1.811454064295653, 1.7350004876096596]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.6294260298177534, 2.2149909215655113, 2.1762940317149067, 1.8194460613036907, 2.087773743167165, 2.075457732925197]}}