{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:48.889551", "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-21_39.5_13.5"}, "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": 2025040002075}, "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 21 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 69126.54892653144}, "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": ["Eritrea", "Ethiopia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": ["Red Sea"]}, "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": 13.5}, "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": 39.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "39.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 39.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 42.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 15.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[39.32, 14.18], [39.35, 14.25], [39.32, 14.32], [38.97, 14.47], [38.82, 14.82], [38.47, 14.97], [38.25, 15.5], [38.47, 16.03], [39.0, 16.25], [39.53, 16.03], [39.68, 15.68], [40.03, 15.53], [40.18, 15.18], [40.3, 15.13], [40.47, 15.53], [41.0, 15.75], [41.53, 15.53], [41.75, 15.0], [41.65, 14.75], [41.68, 14.68], [42.03, 14.53], [42.18, 14.18], [42.53, 14.03], [42.75, 13.5], [42.53, 12.97], [42.0, 12.75], [41.75, 12.85], [41.63, 12.8], [41.75, 12.5], [41.53, 11.97], [41.0, 11.75], [40.75, 11.85], [40.68, 11.82], [40.53, 11.47], [40.18, 11.32], [40.03, 10.97], [39.5, 10.75], [38.97, 10.97], [38.75, 11.5], [38.96, 12.0], [38.75, 12.5], [38.85, 12.75], [38.75, 13.0], [38.85, 13.25], [38.75, 13.5], [38.97, 14.03], [39.32, 14.18]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "N.Eastern-Africa", "Arabian-Peninsula"]}, "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": [[[[38.97, 12.97], [38.75, 13.5], [38.97, 14.03], [39.5, 14.25], [39.75, 14.15], [40.0, 14.25], [40.3, 14.13], [40.47, 14.53], [41.0, 14.75], [41.53, 14.53], [41.68, 14.18], [41.75, 14.15], [42.0, 14.25], [42.53, 14.03], [42.75, 13.5], [42.53, 12.97], [42.0, 12.75], [41.75, 12.85], [41.63, 12.8], [41.75, 12.5], [41.53, 11.97], [41.0, 11.75], [40.75, 11.85], [40.68, 11.82], [40.53, 11.47], [40.0, 11.25], [39.47, 11.47], [39.25, 12.0], [39.35, 12.25], [39.25, 12.5], [39.35, 12.75], [39.32, 12.82], [38.97, 12.97]]]]}, "2025-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.47, 14.97], [38.25, 15.5], [38.47, 16.03], [39.0, 16.25], [39.53, 16.03], [39.68, 15.68], [40.03, 15.53], [40.18, 15.18], [40.3, 15.13], [40.47, 15.53], [41.0, 15.75], [41.53, 15.53], [41.75, 15.0], [41.65, 14.75], [41.68, 14.68], [42.03, 14.53], [42.18, 14.18], [42.53, 14.03], [42.75, 13.5], [42.53, 12.97], [42.0, 12.75], [41.75, 12.85], [41.63, 12.8], [41.75, 12.5], [41.53, 11.97], [41.0, 11.75], [40.75, 11.85], [40.68, 11.82], [40.53, 11.47], [40.18, 11.32], [40.03, 10.97], [39.5, 10.75], [38.97, 10.97], [38.75, 11.5], [38.96, 12.0], [38.75, 12.5], [38.85, 12.75], [38.75, 13.0], [38.85, 13.25], [38.75, 13.5], [38.97, 14.03], [39.32, 14.18], [39.35, 14.25], [39.32, 14.32], [38.97, 14.47], [38.82, 14.82], [38.47, 14.97]]]]}, "2025-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.47, 14.97], [38.25, 15.5], [38.47, 16.03], [39.0, 16.25], [39.53, 16.03], [39.68, 15.68], [40.03, 15.53], [40.18, 15.18], [40.3, 15.13], [40.47, 15.53], [41.0, 15.75], [41.53, 15.53], [41.75, 15.0], [41.65, 14.75], [41.68, 14.68], [42.03, 14.53], [42.18, 14.18], [42.53, 14.03], [42.75, 13.5], [42.53, 12.97], [42.0, 12.75], [41.75, 12.85], [41.63, 12.8], [41.75, 12.5], [41.53, 11.97], [41.0, 11.75], [40.75, 11.85], [40.68, 11.82], [40.53, 11.47], [40.18, 11.32], [40.03, 10.97], [39.5, 10.75], [38.97, 10.97], [38.75, 11.5], [38.96, 12.0], [38.75, 12.5], [38.85, 12.75], [38.75, 13.0], [38.85, 13.25], [38.75, 13.5], [38.97, 14.03], [39.32, 14.18], [39.35, 14.25], [39.32, 14.32], [38.97, 14.47], [38.82, 14.82], [38.47, 14.97]]]]}, "2025-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.47, 14.97], [38.25, 15.5], [38.47, 16.03], [39.0, 16.25], [39.53, 16.03], [39.68, 15.68], [40.03, 15.53], [40.18, 15.18], [40.3, 15.13], [40.47, 15.53], [41.0, 15.75], [41.53, 15.53], [41.75, 15.0], [41.65, 14.75], [41.68, 14.68], [42.03, 14.53], [42.25, 14.0], [42.03, 13.47], [41.5, 13.25], [41.2, 13.38], [41.15, 13.25], [41.25, 13.0], [41.03, 12.47], [40.68, 12.32], [40.65, 12.25], [40.75, 12.0], [40.53, 11.47], [40.18, 11.32], [40.03, 10.97], [39.5, 10.75], [38.97, 10.97], [38.75, 11.5], [38.96, 12.0], [38.75, 12.5], [38.85, 12.75], [38.75, 13.0], [38.85, 13.25], [38.75, 13.5], [38.97, 14.03], [39.32, 14.18], [39.35, 14.25], [39.32, 14.32], [38.97, 14.47], [38.82, 14.82], [38.47, 14.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 3.9827911401445135}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 2.661279630452688}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [31.71036046346029, 30.484246494459114, 30.221634773586175, 28.53035694197115]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [36.63890864054366, 38.30776112874349, 37.95354359944662, 37.29778188069662]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [2.809807554983086, 2.968298800584144, 2.626544517265371, 2.188052077271513]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [3.896094994823102, 3.9827911401445135, 3.8402337220504137, 2.9163614255117523]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4143210577387115, 1.6956519567085664, 1.5631057482517365, 1.4265281635075173]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.67811376251707, 2.1799625823850963, 1.95280376534417, 1.7866930802250613]}}