{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:52.378055", "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-22_to_2025-Apr-26_20.0_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": 2025040002351}, "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 22 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 26 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": 60132.655808526346}, "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": ["Chad"]}, "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": []}, "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": 20.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "20.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 17.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 20.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 12.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 14.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[20.75, 12.5], [20.53, 11.97], [20.0, 11.75], [19.75, 11.85], [19.68, 11.82], [19.53, 11.47], [19.0, 11.25], [18.75, 11.35], [18.5, 11.25], [17.97, 11.47], [17.75, 12.0], [17.85, 12.25], [17.75, 12.5], [17.88, 12.8], [17.75, 12.85], [17.5, 12.75], [16.97, 12.97], [16.75, 13.5], [16.85, 13.75], [16.75, 14.0], [16.97, 14.53], [17.5, 14.75], [17.75, 14.65], [17.82, 14.68], [17.97, 15.03], [18.5, 15.25], [18.75, 15.15], [19.0, 15.25], [19.25, 15.15], [19.5, 15.25], [20.03, 15.03], [20.25, 14.5], [20.15, 14.25], [20.18, 14.18], [20.53, 14.03], [20.75, 13.5], [20.54, 13.0], [20.75, 12.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "Central-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.47, 13.03], [20.0, 13.25], [20.53, 13.03], [20.75, 12.5], [20.53, 11.97], [20.0, 11.75], [19.47, 11.97], [19.25, 12.5], [19.47, 13.03]]]]}, "2025-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.75, 14.0], [16.97, 14.53], [17.5, 14.75], [17.75, 14.65], [17.82, 14.68], [17.97, 15.03], [18.5, 15.25], [18.75, 15.15], [19.0, 15.25], [19.25, 15.15], [19.5, 15.25], [20.03, 15.03], [20.25, 14.5], [20.03, 13.97], [19.68, 13.82], [19.65, 13.75], [19.75, 13.5], [19.63, 13.2], [19.75, 13.15], [20.0, 13.25], [20.53, 13.03], [20.75, 12.5], [20.53, 11.97], [20.0, 11.75], [19.75, 11.85], [19.68, 11.82], [19.53, 11.47], [19.0, 11.25], [18.75, 11.35], [18.5, 11.25], [17.97, 11.47], [17.75, 12.0], [17.97, 12.53], [18.5, 12.75], [18.25, 12.85], [18.0, 12.75], [17.75, 12.85], [17.5, 12.75], [16.97, 12.97], [16.75, 13.5], [16.85, 13.75], [16.75, 14.0]], [[18.75, 12.65], [18.82, 12.68], [18.88, 12.8], [18.75, 12.85], [18.5, 12.75], [18.75, 12.65]]]]}, "2025-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.75, 14.0], [16.97, 14.53], [17.5, 14.75], [17.75, 14.65], [17.82, 14.68], [17.97, 15.03], [18.5, 15.25], [18.75, 15.15], [19.0, 15.25], [19.25, 15.15], [19.5, 15.25], [20.03, 15.03], [20.25, 14.5], [20.15, 14.25], [20.18, 14.18], [20.53, 14.03], [20.75, 13.5], [20.54, 13.0], [20.75, 12.5], [20.53, 11.97], [20.0, 11.75], [19.75, 11.85], [19.68, 11.82], [19.53, 11.47], [19.0, 11.25], [18.75, 11.35], [18.5, 11.25], [17.97, 11.47], [17.75, 12.0], [17.85, 12.25], [17.75, 12.5], [17.88, 12.8], [17.75, 12.85], [17.5, 12.75], [16.97, 12.97], [16.75, 13.5], [16.85, 13.75], [16.75, 14.0]]]]}, "2025-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.75, 14.0], [16.97, 14.53], [17.5, 14.75], [17.75, 14.65], [17.82, 14.68], [17.97, 15.03], [18.5, 15.25], [18.75, 15.15], [19.0, 15.25], [19.25, 15.15], [19.5, 15.25], [20.03, 15.03], [20.25, 14.5], [20.15, 14.25], [20.18, 14.18], [20.53, 14.03], [20.75, 13.5], [20.54, 13.0], [20.75, 12.5], [20.53, 11.97], [20.0, 11.75], [19.75, 11.85], [19.68, 11.82], [19.53, 11.47], [19.0, 11.25], [18.75, 11.35], [18.5, 11.25], [17.97, 11.47], [17.75, 12.0], [17.85, 12.25], [17.75, 12.5], [17.88, 12.8], [17.75, 12.85], [17.5, 12.75], [16.97, 12.97], [16.75, 13.5], [16.85, 13.75], [16.75, 14.0]]]]}, "2025-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.75, 14.0], [16.97, 14.53], [17.5, 14.75], [17.75, 14.65], [17.82, 14.68], [17.97, 15.03], [18.5, 15.25], [18.75, 15.15], [19.0, 15.25], [19.25, 15.15], [19.5, 15.25], [20.03, 15.03], [20.25, 14.5], [20.15, 14.25], [20.18, 14.18], [20.53, 14.03], [20.75, 13.5], [20.54, 13.0], [20.75, 12.5], [20.53, 11.97], [20.0, 11.75], [19.75, 11.85], [19.68, 11.82], [19.53, 11.47], [19.0, 11.25], [18.75, 11.35], [18.5, 11.25], [17.97, 11.47], [17.75, 12.0], [17.85, 12.25], [17.75, 12.5], [17.93, 12.93], [17.5, 12.75], [16.97, 12.97], [16.75, 13.5], [16.85, 13.75], [16.75, 14.0]], [[18.07, 13.07], [18.5, 13.25], [18.25, 13.35], [18.18, 13.32], [18.07, 13.07]], [[18.75, 13.15], [18.82, 13.18], [18.88, 13.3], [18.75, 13.35], [18.5, 13.25], [18.75, 13.15]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 2.9395767761714637}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 1.8611558037864893}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [35.19499867757162, 35.7066579182943, 35.90939814249674, 35.82485911051435, 35.57551383224188]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [35.19499867757162, 36.172331746419275, 36.9565254211426, 36.207439676920615, 36.01006978352865]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.410269087752738, 1.7815097525196582, 1.9543060763943942, 1.9337614339209552, 1.762947534974066]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [1.410269087752738, 2.472224897982869, 2.864267417269218, 2.9395767761714637, 1.9705111308306869]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3346690397861325, 1.5075415743493898, 1.6239323705341693, 1.5097552823579334, 1.2999898171281727]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.3346690397861325, 2.125818545398535, 2.2946962218299385, 2.0649958038886083, 1.496899418512663]}}