{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:48.660999", "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-Apr-18_to_2025-Apr-22_3.5_6.5"}, "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": 2025040002071}, "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": "April 18 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 22 2025"}, "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": 88928.96778809035}, "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": ["Benin", "Ghana", "Nigeria", "Togo"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": 6.5}, "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": 3.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "3.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": -2.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 3.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 6.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 8.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[4.25, 6.5], [4.03, 5.97], [3.5, 5.75], [3.25, 5.85], [3.0, 5.75], [2.5, 5.96], [2.0, 5.75], [1.5, 5.96], [1.0, 5.75], [0.75, 5.85], [0.5, 5.75], [0.25, 5.85], [0.0, 5.75], [-0.25, 5.85], [-0.5, 5.75], [-1.03, 5.97], [-1.18, 6.32], [-1.25, 6.35], [-1.5, 6.25], [-2.03, 6.47], [-2.18, 6.82], [-2.25, 6.85], [-2.5, 6.75], [-3.03, 6.97], [-3.25, 7.5], [-3.15, 7.75], [-3.25, 8.0], [-3.03, 8.53], [-2.5, 8.75], [-2.25, 8.65], [-2.0, 8.75], [-1.75, 8.65], [-1.5, 8.75], [-0.97, 8.53], [-0.82, 8.18], [-0.5, 8.04], [-0.18, 8.18], [-0.15, 8.25], [-0.25, 8.5], [-0.03, 9.03], [0.5, 9.25], [1.03, 9.03], [1.25, 8.5], [1.15, 8.25], [1.25, 8.0], [1.15, 7.75], [1.2, 7.63], [1.5, 7.75], [1.8, 7.63], [1.97, 8.03], [2.5, 8.25], [2.75, 8.15], [3.0, 8.25], [3.53, 8.03], [3.68, 7.68], [4.03, 7.53], [4.25, 7.0], [4.15, 6.75], [4.25, 6.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.0, 5.75], [2.47, 5.97], [2.25, 6.5], [2.47, 7.03], [3.0, 7.25], [3.25, 7.15], [3.5, 7.25], [4.03, 7.03], [4.25, 6.5], [4.03, 5.97], [3.5, 5.75], [3.25, 5.85], [3.0, 5.75]]]]}, "2025-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.0, 5.75], [2.47, 5.97], [2.25, 6.5], [2.47, 7.03], [3.0, 7.25], [3.25, 7.15], [3.5, 7.25], [4.03, 7.03], [4.25, 6.5], [4.03, 5.97], [3.5, 5.75], [3.25, 5.85], [3.0, 5.75]]]]}, "2025-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.25, 8.0], [-3.03, 8.53], [-2.5, 8.75], [-2.25, 8.65], [-2.0, 8.75], [-1.75, 8.65], [-1.5, 8.75], [-0.97, 8.53], [-0.82, 8.18], [-0.5, 8.04], [-0.18, 8.18], [-0.15, 8.25], [-0.25, 8.5], [-0.03, 9.03], [0.5, 9.25], [1.03, 9.03], [1.25, 8.5], [1.15, 8.25], [1.25, 8.0], [1.15, 7.75], [1.2, 7.63], [1.5, 7.75], [1.8, 7.63], [1.97, 8.03], [2.5, 8.25], [2.75, 8.15], [3.0, 8.25], [3.53, 8.03], [3.68, 7.68], [4.03, 7.53], [4.25, 7.0], [4.15, 6.75], [4.25, 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mean t2m anomalies.", "value": [1.34961386658685, 1.0706865868238538, 1.2851843417644109, 1.6945109480932734, 1.5338407985562759]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [1.3797182606148795, 1.0863415090328772, 1.5206261277410817, 2.0066822224601992, 1.7849765304081302]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.8254308557092096, 1.4358679865530468, 1.4039934715109754, 1.8728797701466344, 1.755817243292619]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.8733196823508538, 1.4510060397912086, 1.605718324745921, 2.2040009184773997, 2.0081265458792523]}}