{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-20 10:52:33.223016", "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": "2026-Apr-20_to_2026-Apr-23_10.0_34.5"}, "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": 2026040002294}, "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 20 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 23 2026"}, "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": 76554.92365286587}, "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", "Tunisia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "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": ["Mediterranean Sea - Eastern Basin"]}, "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": 34.5}, "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": 10.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "10.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 7.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 11.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 32.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 35.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.25, 34.5], [7.47, 35.03], [7.82, 35.18], [7.97, 35.53], [8.32, 35.68], [8.47, 36.03], [9.0, 36.25], [9.25, 36.15], [9.5, 36.25], [9.75, 36.15], [10.0, 36.25], [10.53, 36.03], [10.68, 35.68], [10.75, 35.65], [11.0, 35.75], [11.25, 35.65], [11.5, 35.75], [12.03, 35.53], [12.25, 35.0], [12.03, 34.47], [11.63, 34.3], [11.75, 34.0], [11.53, 33.47], [11.18, 33.32], [11.15, 33.25], [11.25, 33.0], [11.03, 32.47], [10.5, 32.25], [9.97, 32.47], [9.82, 32.82], [9.75, 32.85], [9.5, 32.75], [9.25, 32.85], [9.0, 32.75], [8.75, 32.85], [8.5, 32.75], [7.97, 32.97], [7.75, 33.5], [7.85, 33.75], [7.82, 33.82], [7.47, 33.97], [7.25, 34.5]]]]}, "2026-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.97, 34.53], [7.32, 34.68], [7.47, 35.03], [7.82, 35.18], [7.97, 35.53], [8.32, 35.68], [8.47, 36.03], [9.0, 36.25], [9.25, 36.15], [9.5, 36.25], [9.75, 36.15], [10.0, 36.25], [10.53, 36.03], [10.68, 35.68], [10.75, 35.65], [11.0, 35.75], [11.25, 35.65], [11.5, 35.75], [12.03, 35.53], [12.25, 35.0], [12.03, 34.47], [11.63, 34.3], [11.75, 34.0], [11.53, 33.47], [11.18, 33.32], [11.15, 33.25], [11.25, 33.0], [11.03, 32.47], [10.5, 32.25], [9.97, 32.47], [9.82, 32.82], [9.75, 32.85], [9.5, 32.75], [9.25, 32.85], [9.0, 32.75], [8.75, 32.85], [8.5, 32.75], [8.0, 32.96], [7.5, 32.75], [6.97, 32.97], [6.75, 33.5], [6.85, 33.75], [6.75, 34.0], [6.97, 34.53]]]]}, "2026-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.97, 34.53], [7.32, 34.68], [7.47, 35.03], [7.82, 35.18], [7.97, 35.53], [8.32, 35.68], [8.47, 36.03], [9.0, 36.25], [9.25, 36.15], [9.5, 36.25], [9.75, 36.15], [10.0, 36.25], [10.53, 36.03], [10.68, 35.68], [10.75, 35.65], [11.0, 35.75], [11.25, 35.65], [11.5, 35.75], [12.03, 35.53], [12.25, 35.0], [12.03, 34.47], [11.63, 34.3], [11.75, 34.0], [11.53, 33.47], [11.18, 33.32], [11.15, 33.25], [11.25, 33.0], [11.03, 32.47], [10.5, 32.25], [9.97, 32.47], [9.82, 32.82], [9.75, 32.85], [9.5, 32.75], [9.25, 32.85], [9.0, 32.75], [8.75, 32.85], [8.5, 32.75], [8.0, 32.96], [7.5, 32.75], [6.97, 32.97], [6.75, 33.5], [6.85, 33.75], [6.75, 34.0], [6.97, 34.53]]]]}, "2026-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.97, 34.53], [7.5, 34.75], [8.03, 34.53], [8.25, 34.0], [8.15, 33.75], [8.25, 33.5], [8.03, 32.97], [7.5, 32.75], [6.97, 32.97], [6.75, 33.5], [6.85, 33.75], [6.75, 34.0], [6.97, 34.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 7.8308196125899485}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 5.302932383472795}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.428480130150263, 24.727507781982524, 24.535268656412768, 26.367205556233785]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.967682139078818, 27.78697230021163, 28.274502054850302, 26.676694488525413]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.138378191534168, 6.072434999865224, 5.694670985834248, 4.188072789305323]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [5.3298721541508485, 7.402968704250782, 7.8308196125899485, 4.301295185387801]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.5807336171803488, 2.4086338684171866, 2.232523342345343, 1.4321862558065317]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.9759561971458068, 3.609628832062316, 3.120750156582108, 1.4905547294763724]}}