{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:51.683034", "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": "2024-Mar-25_to_2024-Mar-28_41.5_13.0"}, "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": 2024030000543}, "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": "March 25 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 28 2024"}, "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": "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": 54323.49163630852}, "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": ["Eritrea", "Ethiopia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": 13.0}, "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": 41.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "41.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 40.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 42.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 13.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[39.47, 13.03], [39.82, 13.18], [39.97, 13.53], [40.32, 13.68], [40.47, 14.03], [41.0, 14.25], [41.25, 14.15], [41.5, 14.25], [42.03, 14.03], [42.18, 13.68], [42.53, 13.53], [42.75, 13.0], [42.65, 12.75], [42.75, 12.5], [42.65, 12.25], [42.75, 12.0], [42.53, 11.47], [42.0, 11.25], [41.75, 11.35], [41.5, 11.25], [41.25, 11.35], [41.18, 11.32], [41.03, 10.97], [40.5, 10.75], [40.25, 10.85], [40.0, 10.75], [39.47, 10.97], [39.25, 11.5], [39.35, 11.75], [39.25, 12.0], [39.35, 12.25], [39.25, 12.5], [39.47, 13.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-03-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.25, 12.0], [39.35, 12.25], [39.25, 12.5], [39.47, 13.03], [39.82, 13.18], [39.97, 13.53], [40.32, 13.68], [40.47, 14.03], [41.0, 14.25], [41.25, 14.15], [41.5, 14.25], [42.03, 14.03], [42.18, 13.68], [42.53, 13.53], [42.75, 13.0], [42.65, 12.75], [42.75, 12.5], [42.65, 12.25], [42.75, 12.0], [42.53, 11.47], [42.0, 11.25], [41.75, 11.35], [41.5, 11.25], [41.25, 11.35], [41.18, 11.32], [41.03, 10.97], [40.5, 10.75], [40.25, 10.85], [40.0, 10.75], [39.47, 10.97], [39.25, 11.5], [39.35, 11.75], [39.25, 12.0]]]]}, "2024-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.25, 12.0], [39.35, 12.25], [39.25, 12.5], [39.47, 13.03], [39.82, 13.18], [39.97, 13.53], [40.32, 13.68], [40.47, 14.03], [41.0, 14.25], [41.25, 14.15], [41.5, 14.25], [42.03, 14.03], [42.18, 13.68], [42.53, 13.53], [42.75, 13.0], [42.65, 12.75], [42.75, 12.5], [42.65, 12.25], [42.75, 12.0], [42.53, 11.47], [42.0, 11.25], [41.75, 11.35], [41.5, 11.25], [41.25, 11.35], [41.18, 11.32], [41.03, 10.97], [40.5, 10.75], [40.25, 10.85], [40.0, 10.75], [39.47, 10.97], [39.25, 11.5], [39.35, 11.75], [39.25, 12.0]]]]}, "2024-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.25, 12.0], [39.35, 12.25], [39.25, 12.5], [39.47, 13.03], [39.82, 13.18], [39.97, 13.53], [40.32, 13.68], [40.47, 14.03], [41.0, 14.25], [41.25, 14.15], [41.5, 14.25], [42.03, 14.03], [42.18, 13.68], [42.53, 13.53], [42.75, 13.0], [42.65, 12.75], [42.75, 12.5], [42.65, 12.25], [42.75, 12.0], [42.53, 11.47], [42.0, 11.25], [41.75, 11.35], [41.5, 11.25], [41.25, 11.35], [41.18, 11.32], [41.03, 10.97], [40.5, 10.75], [40.25, 10.85], [40.0, 10.75], [39.47, 10.97], [39.25, 11.5], [39.35, 11.75], [39.25, 12.0]]]]}, "2024-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.25, 13.0], [40.47, 13.53], [41.0, 13.75], [41.25, 13.65], [41.5, 13.75], [42.03, 13.53], [42.18, 13.18], [42.53, 13.03], [42.75, 12.5], [42.53, 11.97], [42.18, 11.82], [42.03, 11.47], [41.5, 11.25], [41.25, 11.35], [41.0, 11.25], [40.47, 11.47], [40.25, 12.0], [40.46, 12.5], [40.25, 13.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.715835828168281}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.6276490855136236}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.53684781341491, 24.586229545346896, 25.885348946255874, 27.884554693668463]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.172751870790194, 20.523952045702345, 21.190551191379598, 26.913762241198413]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.475747774068149, -4.463649314083126, -3.259280587388803, -2.6804578285160026]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.951578511282094, -5.715835828168281, -4.5544042042333786, -3.1332695387069407]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7552819320705793, -2.2523284637369567, -1.658387717261843, -1.4847557910650961]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.352479423720907, -2.8411271001296865, -2.075634962575212, -1.698129831136418]}}