{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:55.891367", "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-Mar-25_to_2025-Mar-28_42.0_6.5"}, "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": 2025030000656}, "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 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 28 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": "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": 58354.84940942502}, "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": ["Ethiopia"]}, "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": 6.5}, "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": 42.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "42.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 40.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 43.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 5.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 7.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[40.85, 6.75], [40.82, 6.82], [40.75, 6.85], [40.5, 6.75], [39.97, 6.97], [39.75, 7.5], [39.97, 8.03], [40.5, 8.25], [40.75, 8.15], [41.0, 8.25], [41.25, 8.15], [41.5, 8.25], [42.03, 8.03], [42.18, 7.68], [42.25, 7.65], [42.5, 7.75], [42.75, 7.65], [43.0, 7.75], [43.53, 7.53], [43.75, 7.0], [43.65, 6.75], [43.75, 6.5], [43.65, 6.25], [43.75, 6.0], [43.65, 5.75], [43.75, 5.5], [43.53, 4.97], [43.0, 4.75], [42.5, 4.96], [42.0, 4.75], [41.75, 4.85], [41.5, 4.75], [41.25, 4.85], [41.0, 4.75], [40.47, 4.97], [40.25, 5.5], [40.35, 5.75], [40.25, 6.0], [40.47, 6.53], [40.82, 6.68], [40.85, 6.75]]]]}}, "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": {"2025-03-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.25, 6.0], [40.47, 6.53], [40.82, 6.68], [40.85, 6.75], [40.82, 6.82], [40.75, 6.85], [40.5, 6.75], [39.97, 6.97], [39.75, 7.5], [39.97, 8.03], [40.5, 8.25], [40.75, 8.15], [41.0, 8.25], [41.25, 8.15], [41.5, 8.25], [42.03, 8.03], [42.18, 7.68], [42.25, 7.65], [42.5, 7.75], [42.75, 7.65], [43.0, 7.75], [43.53, 7.53], [43.75, 7.0], [43.65, 6.75], [43.75, 6.5], [43.65, 6.25], [43.75, 6.0], [43.65, 5.75], [43.75, 5.5], [43.53, 4.97], [43.0, 4.75], [42.5, 4.96], [42.0, 4.75], [41.75, 4.85], [41.5, 4.75], [41.25, 4.85], [41.0, 4.75], [40.47, 4.97], [40.25, 5.5], [40.35, 5.75], [40.25, 6.0]]]]}, "2025-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.25, 6.0], [40.47, 6.53], [40.82, 6.68], [40.85, 6.75], [40.82, 6.82], [40.75, 6.85], [40.5, 6.75], [39.97, 6.97], [39.75, 7.5], [39.97, 8.03], [40.5, 8.25], [40.75, 8.15], [41.0, 8.25], [41.25, 8.15], [41.5, 8.25], [42.03, 8.03], [42.18, 7.68], [42.25, 7.65], [42.5, 7.75], [42.75, 7.65], [43.0, 7.75], [43.53, 7.53], [43.75, 7.0], [43.65, 6.75], [43.75, 6.5], [43.65, 6.25], [43.75, 6.0], [43.65, 5.75], [43.75, 5.5], [43.53, 4.97], [43.0, 4.75], [42.5, 4.96], [42.0, 4.75], [41.75, 4.85], [41.5, 4.75], [41.25, 4.85], [41.0, 4.75], [40.47, 4.97], [40.25, 5.5], [40.35, 5.75], [40.25, 6.0]]]]}, "2025-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.25, 6.0], [40.47, 6.53], [40.82, 6.68], [40.85, 6.75], [40.82, 6.82], [40.75, 6.85], [40.5, 6.75], [39.97, 6.97], [39.75, 7.5], [39.97, 8.03], [40.5, 8.25], [40.75, 8.15], [41.0, 8.25], [41.25, 8.15], [41.5, 8.25], [42.03, 8.03], [42.18, 7.68], [42.25, 7.65], [42.5, 7.75], [42.75, 7.65], [43.0, 7.75], [43.53, 7.53], [43.75, 7.0], [43.65, 6.75], [43.75, 6.5], [43.65, 6.25], [43.75, 6.0], [43.65, 5.75], [43.75, 5.5], [43.53, 4.97], [43.0, 4.75], [42.5, 4.96], [42.0, 4.75], [41.75, 4.85], [41.5, 4.75], [41.25, 4.85], [41.0, 4.75], [40.47, 4.97], [40.25, 5.5], [40.35, 5.75], [40.25, 6.0]]]]}, "2025-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.47, 7.03], [42.0, 7.25], [42.53, 7.03], [42.75, 6.5], [42.53, 5.97], [42.0, 5.75], [41.47, 5.97], [41.25, 6.5], [41.47, 7.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.027537229827431}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.0827772714921275}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.044902921977837, 25.044182814213343, 25.214216386226155, 27.272423044840536]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.858961995442712, 19.52698160807296, 19.339002227783226, 27.272423044840536]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.1608540600908137, -3.1551150168210054, -2.959199811768539, -2.572872861616588]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.027537229827431, -3.8732227610464633, -3.6642606150401207, -2.572872861616588]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9065956708823943, -1.9197381024073785, -1.7906673874593455, -1.5474204184137708]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3334083846137474, -2.4843921897206878, -2.234570306590964, -1.5474204184137708]}}