{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-20 10:52:29.046625", "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-21_to_2026-Apr-23_31.5_19.0"}, "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": 2026040000637}, "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 21 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": 3}, "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": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 93573.9510644858}, "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": ["Sudan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "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": 19.0}, "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": 31.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "31.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 28.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 33.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 17.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 20.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.35, 18.75], [28.25, 19.0], [28.35, 19.25], [28.25, 19.5], [28.47, 20.03], [29.0, 20.25], [29.25, 20.15], [29.5, 20.25], [29.75, 20.15], [30.0, 20.25], [30.25, 20.15], [30.5, 20.25], [30.75, 20.15], [31.0, 20.25], [31.25, 20.15], [31.5, 20.25], [31.75, 20.15], [32.0, 20.25], [32.25, 20.15], [32.32, 20.18], [32.47, 20.53], [33.0, 20.75], [33.53, 20.53], [33.75, 20.0], [33.65, 19.75], [33.75, 19.5], [33.65, 19.25], [33.75, 19.0], [33.65, 18.75], [33.75, 18.5], [33.53, 17.97], [33.18, 17.82], [33.03, 17.47], [32.5, 17.25], [31.97, 17.47], [31.82, 17.82], [31.75, 17.85], [31.5, 17.75], [31.25, 17.85], [31.0, 17.75], [30.75, 17.85], [30.68, 17.82], [30.53, 17.47], [30.0, 17.25], [29.75, 17.35], [29.5, 17.25], [29.25, 17.35], [29.0, 17.25], [28.47, 17.47], [28.25, 18.0], [28.35, 18.25], [28.25, 18.5], [28.35, 18.75]]]]}, "2026-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.35, 18.75], [28.25, 19.0], [28.35, 19.25], [28.25, 19.5], [28.47, 20.03], [29.0, 20.25], [29.25, 20.15], [29.5, 20.25], [29.75, 20.15], [30.0, 20.25], [30.25, 20.15], [30.5, 20.25], [30.75, 20.15], [31.0, 20.25], [31.25, 20.15], [31.5, 20.25], [31.75, 20.15], [32.0, 20.25], [32.25, 20.15], [32.32, 20.18], [32.47, 20.53], [33.0, 20.75], [33.53, 20.53], [33.75, 20.0], [33.65, 19.75], [33.75, 19.5], [33.65, 19.25], [33.75, 19.0], [33.65, 18.75], [33.75, 18.5], [33.53, 17.97], [33.18, 17.82], [33.03, 17.47], [32.5, 17.25], [31.97, 17.47], [31.82, 17.82], [31.75, 17.85], [31.5, 17.75], [31.25, 17.85], [31.0, 17.75], [30.75, 17.85], [30.68, 17.82], [30.53, 17.47], [30.0, 17.25], [29.75, 17.35], [29.5, 17.25], [29.25, 17.35], [29.0, 17.25], [28.47, 17.47], [28.25, 18.0], [28.35, 18.25], [28.25, 18.5], [28.35, 18.75]]]]}, "2026-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.35, 18.75], [28.25, 19.0], [28.35, 19.25], [28.25, 19.5], [28.47, 20.03], [29.0, 20.25], [29.25, 20.15], [29.5, 20.25], [29.75, 20.15], [30.0, 20.25], [30.25, 20.15], [30.5, 20.25], [30.75, 20.15], [31.0, 20.25], [31.25, 20.15], [31.5, 20.25], [31.75, 20.15], [32.0, 20.25], [32.25, 20.15], [32.32, 20.18], [32.47, 20.53], [33.0, 20.75], [33.53, 20.53], [33.75, 20.0], [33.65, 19.75], [33.75, 19.5], [33.65, 19.25], [33.75, 19.0], [33.65, 18.75], [33.75, 18.5], [33.53, 17.97], [33.18, 17.82], [33.03, 17.47], [32.5, 17.25], [31.97, 17.47], [31.82, 17.82], [31.75, 17.85], [31.5, 17.75], [31.25, 17.85], [31.0, 17.75], [30.75, 17.85], [30.68, 17.82], [30.53, 17.47], [30.0, 17.25], [29.75, 17.35], [29.5, 17.25], [29.25, 17.35], [29.0, 17.25], [28.47, 17.47], [28.25, 18.0], [28.35, 18.25], [28.25, 18.5], [28.35, 18.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.062730601052124}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.68868825809317}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.91219609578451, 25.413448588053427, 26.518849945068382]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.24978154500326, 23.78003590901693, 24.7835467020671]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.038093337071034, -5.598738007906375, -4.4292334293021]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.713689833918238, -6.062730601052124, -4.868464949676877]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4375285413384142, -1.948180680246048, -1.489170003366306]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5930962126024353, -2.069424204002373, -1.6270253362347453]}}