{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:35.419775", "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-May-29_to_2025-Jun-01_10.0_17.5"}, "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": 2025050002685}, "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": "May 29 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 01 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": 56221.24844252456}, "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": ["Niger"]}, "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": 17.5}, "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": 7.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 10.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 18.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[7.5, 17.75], [8.03, 17.53], [8.18, 17.18], [8.25, 17.15], [8.32, 17.18], [8.47, 17.53], [8.82, 17.68], [8.85, 17.75], [8.75, 18.0], [8.97, 18.53], [9.32, 18.68], [9.47, 19.03], [10.0, 19.25], [10.53, 19.03], [10.75, 18.5], [10.65, 18.25], [10.75, 18.0], [10.65, 17.75], [10.75, 17.5], [10.65, 17.25], [10.75, 17.0], [10.65, 16.75], [10.75, 16.5], [10.53, 15.97], [10.18, 15.82], [10.03, 15.47], [9.68, 15.32], [9.53, 14.97], [9.0, 14.75], [8.75, 14.85], [8.5, 14.75], [7.97, 14.97], [7.82, 15.32], [7.47, 15.47], [7.25, 16.0], [7.35, 16.25], [7.32, 16.32], [6.97, 16.47], [6.75, 17.0], [6.97, 17.53], [7.5, 17.75]]]]}}, "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": {"2025-05-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.25, 17.5], [9.47, 18.03], [10.0, 18.25], [10.53, 18.03], [10.75, 17.5], [10.65, 17.25], [10.75, 17.0], [10.53, 16.47], [10.0, 16.25], [9.47, 16.47], [9.25, 17.0], [9.35, 17.25], [9.25, 17.5]]]]}, "2025-05-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.97, 16.47], [6.75, 17.0], [6.97, 17.53], [7.5, 17.75], [8.03, 17.53], [8.18, 17.18], [8.25, 17.15], [8.32, 17.18], [8.47, 17.53], [8.82, 17.68], [8.85, 17.75], [8.75, 18.0], [8.97, 18.53], [9.32, 18.68], [9.47, 19.03], [10.0, 19.25], [10.53, 19.03], [10.75, 18.5], [10.65, 18.25], [10.75, 18.0], [10.65, 17.75], [10.75, 17.5], [10.65, 17.25], [10.75, 17.0], [10.65, 16.75], [10.75, 16.5], [10.53, 15.97], [10.18, 15.82], [10.03, 15.47], [9.68, 15.32], [9.53, 14.97], [9.0, 14.75], [8.75, 14.85], [8.5, 14.75], [7.97, 14.97], [7.82, 15.32], [7.47, 15.47], [7.25, 16.0], [7.35, 16.25], [7.32, 16.32], [6.97, 16.47]]]]}, "2025-05-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.97, 16.47], [6.75, 17.0], [6.97, 17.53], [7.5, 17.75], [8.03, 17.53], [8.18, 17.18], [8.25, 17.15], [8.32, 17.18], [8.47, 17.53], [8.82, 17.68], [8.85, 17.75], [8.75, 18.0], [8.97, 18.53], [9.32, 18.68], [9.47, 19.03], [10.0, 19.25], [10.53, 19.03], [10.75, 18.5], [10.65, 18.25], [10.75, 18.0], [10.65, 17.75], [10.75, 17.5], [10.65, 17.25], [10.75, 17.0], [10.65, 16.75], [10.75, 16.5], [10.53, 15.97], [10.18, 15.82], [10.03, 15.47], [9.68, 15.32], [9.53, 14.97], [9.0, 14.75], [8.75, 14.85], [8.5, 14.75], [7.97, 14.97], [7.82, 15.32], [7.47, 15.47], [7.25, 16.0], [7.35, 16.25], [7.32, 16.32], [6.97, 16.47]]]]}, "2025-06-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.97, 16.47], [6.75, 17.0], [6.97, 17.53], [7.5, 17.75], [8.03, 17.53], [8.18, 17.18], [8.25, 17.15], [8.32, 17.18], [8.47, 17.53], [8.82, 17.68], [8.85, 17.75], [8.75, 18.0], [8.97, 18.53], [9.32, 18.68], [9.47, 19.03], [10.0, 19.25], [10.53, 19.03], [10.75, 18.5], [10.65, 18.25], [10.75, 18.0], [10.65, 17.75], [10.75, 17.5], [10.65, 17.25], [10.75, 17.0], [10.65, 16.75], [10.75, 16.5], [10.53, 15.97], [10.18, 15.82], [10.03, 15.47], [9.68, 15.32], [9.53, 14.97], [9.0, 14.75], [8.75, 14.85], [8.5, 14.75], [7.97, 14.97], [7.82, 15.32], [7.47, 15.47], [7.25, 16.0], [7.35, 16.25], [7.32, 16.32], [6.97, 16.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 3.5491878912249604}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 2.361802427132262}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [34.6335439046224, 35.1524539612887, 36.25600110773456, 35.83876765736363]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [34.6701649983724, 37.39861195882162, 38.5331906636556, 37.60506083170577]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.7346852064738698, 1.8005588043696195, 2.8956530137246963, 2.455207802319143]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [1.767934740564158, 2.152538571764751, 3.4657845256730866, 3.5491878912249604]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.2638276387977283, 1.4082242686602993, 2.312117333707079, 1.9303251441148468]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.314286153249185, 1.9129298282947933, 3.005367869748407, 2.5803899355750466]}}