{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-20 10:52:29.528717", "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-25_to_2026-Apr-27_22.5_24.5"}, "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": 2026040000779}, "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 25 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 27 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": 92209.5804514967}, "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": ["Libya"]}, "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": 24.5}, "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": 22.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "22.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 20.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 23.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.85, 24.75], [19.75, 25.0], [19.85, 25.25], [19.75, 25.5], [19.97, 26.03], [20.32, 26.18], [20.47, 26.53], [20.82, 26.68], [20.97, 27.03], [21.5, 27.25], [21.75, 27.15], [22.0, 27.25], [22.25, 27.15], [22.5, 27.25], [22.75, 27.15], [23.0, 27.25], [23.25, 27.15], [23.5, 27.25], [24.03, 27.03], [24.25, 26.5], [24.15, 26.25], [24.25, 26.0], [24.15, 25.75], [24.25, 25.5], [24.03, 24.97], [23.68, 24.82], [23.53, 24.47], [23.18, 24.32], [23.03, 23.97], [22.68, 23.82], [22.53, 23.47], [22.18, 23.32], [22.03, 22.97], [21.5, 22.75], [20.97, 22.97], [20.8, 23.38], [20.5, 23.25], [19.97, 23.47], [19.75, 24.0], [19.85, 24.25], [19.75, 24.5], [19.85, 24.75]]]]}, "2026-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.85, 24.75], [19.75, 25.0], [19.85, 25.25], [19.75, 25.5], [19.97, 26.03], [20.32, 26.18], [20.47, 26.53], [20.82, 26.68], [20.97, 27.03], [21.5, 27.25], [21.75, 27.15], [22.0, 27.25], [22.25, 27.15], [22.5, 27.25], [22.75, 27.15], [23.0, 27.25], [23.25, 27.15], [23.5, 27.25], [24.03, 27.03], [24.25, 26.5], [24.15, 26.25], [24.25, 26.0], [24.15, 25.75], [24.25, 25.5], [24.03, 24.97], [23.68, 24.82], [23.53, 24.47], [23.18, 24.32], [23.03, 23.97], [22.68, 23.82], [22.53, 23.47], [22.18, 23.32], [22.03, 22.97], [21.5, 22.75], [20.97, 22.97], [20.8, 23.38], [20.5, 23.25], [19.97, 23.47], [19.75, 24.0], [19.85, 24.25], [19.75, 24.5], [19.85, 24.75]]]]}, "2026-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.85, 24.75], [19.75, 25.0], [19.85, 25.25], [19.75, 25.5], [19.97, 26.03], [20.32, 26.18], [20.47, 26.53], [20.82, 26.68], [20.97, 27.03], [21.5, 27.25], [21.75, 27.15], [22.0, 27.25], [22.25, 27.15], [22.5, 27.25], [22.75, 27.15], [23.0, 27.25], [23.25, 27.15], [23.5, 27.25], [24.03, 27.03], [24.25, 26.5], [24.15, 26.25], [24.25, 26.0], [24.15, 25.75], [24.25, 25.5], [24.03, 24.97], [23.68, 24.82], [23.53, 24.47], [23.18, 24.32], [23.03, 23.97], [22.68, 23.82], [22.53, 23.47], [22.18, 23.32], [22.03, 22.97], [21.5, 22.75], [20.97, 22.97], [20.8, 23.38], [20.5, 23.25], [19.97, 23.47], [19.75, 24.0], [19.85, 24.25], [19.75, 24.5], [19.85, 24.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.367383721610736}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.9898066950162825}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.815940648859225, 18.955206036808534, 20.392623423566704]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.691414133707724, 18.286398824055993, 19.745586649576865]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.695223169421189, -6.754728836735542, -5.51946807889212]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.215087342025697, -7.367383721610736, -6.252082785399239]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5023324098501094, -1.8192136586353411, -1.527126519442297]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.675102382919673, -1.944965542910318, -1.7005807785794567]}}