{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:57.750986", "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-05_to_2025-May-08_41.5_-1.0"}, "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": 2025050000166}, "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 05 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 08 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": 71084.31667936905}, "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": ["Kenya", "Somalia"]}, "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": ["Indian Ocean"]}, "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": -1.0}, "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": 40.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 42.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -1.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 2.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[39.97, 1.03], [40.38, 1.2], [40.32, 1.32], [39.97, 1.47], [39.75, 2.0], [39.97, 2.53], [40.5, 2.75], [40.75, 2.65], [41.0, 2.75], [41.53, 2.53], [41.68, 2.18], [42.03, 2.03], [42.25, 1.5], [42.15, 1.25], [42.18, 1.18], [42.25, 1.15], [42.5, 1.25], [43.03, 1.03], [43.25, 0.5], [43.15, 0.25], [43.25, 0.0], [43.03, -0.53], [42.68, -0.68], [42.53, -1.03], [42.18, -1.18], [42.15, -1.25], [42.25, -1.5], [42.03, -2.03], [41.5, -2.25], [41.25, -2.15], [41.0, -2.25], [40.47, -2.03], [40.25, -1.5], [40.35, -1.25], [40.32, -1.18], [39.97, -1.03], [39.75, -0.5], [39.85, -0.25], [39.75, 0.0], [39.85, 0.25], [39.75, 0.5], [39.97, 1.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa", "S.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-05-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.5, 1.25], [39.97, 1.47], [39.75, 2.0], [39.97, 2.53], [40.5, 2.75], [40.75, 2.65], [41.0, 2.75], [41.53, 2.53], [41.75, 2.0], [41.53, 1.47], [41.0, 1.25], [40.75, 1.35], [40.5, 1.25]]]]}, "2025-05-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.75, 0.0], [39.85, 0.25], [39.75, 0.5], [39.97, 1.03], [40.38, 1.2], [40.32, 1.32], [39.97, 1.47], [39.75, 2.0], [39.97, 2.53], [40.5, 2.75], [40.75, 2.65], [41.0, 2.75], [41.53, 2.53], [41.68, 2.18], [42.03, 2.03], [42.25, 1.5], [42.15, 1.25], [42.18, 1.18], [42.25, 1.15], [42.5, 1.25], [43.03, 1.03], [43.25, 0.5], [43.15, 0.25], [43.25, 0.0], [43.03, -0.53], [42.68, -0.68], [42.53, -1.03], [42.18, -1.18], [42.15, -1.25], [42.25, -1.5], [42.03, -2.03], [41.5, -2.25], [41.25, -2.15], [41.0, -2.25], [40.47, -2.03], [40.25, -1.5], [40.35, -1.25], [40.32, -1.18], [39.97, -1.03], [39.75, -0.5], [39.85, -0.25], [39.75, 0.0]]]]}, "2025-05-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.75, 0.0], [39.85, 0.25], [39.75, 0.5], [39.97, 1.03], [40.38, 1.2], [40.32, 1.32], [39.97, 1.47], [39.75, 2.0], [39.97, 2.53], [40.5, 2.75], [40.75, 2.65], [41.0, 2.75], [41.53, 2.53], [41.68, 2.18], [42.03, 2.03], [42.25, 1.5], [42.15, 1.25], [42.18, 1.18], [42.25, 1.15], [42.5, 1.25], [43.03, 1.03], [43.25, 0.5], [43.15, 0.25], [43.25, 0.0], [43.03, -0.53], [42.68, -0.68], [42.53, -1.03], [42.18, -1.18], [42.15, -1.25], [42.25, -1.5], [42.03, -2.03], [41.5, -2.25], [41.25, -2.15], [41.0, -2.25], [40.47, -2.03], [40.25, -1.5], [40.35, -1.25], [40.32, -1.18], [39.97, -1.03], [39.75, -0.5], [39.85, -0.25], [39.75, 0.0]]]]}, "2025-05-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.75, 0.0], [39.85, 0.25], [39.75, 0.5], [39.97, 1.03], [40.38, 1.2], [40.25, 1.5], [40.47, 2.03], [41.0, 2.25], [41.25, 2.15], [41.5, 2.25], [42.03, 2.03], [42.25, 1.5], [42.15, 1.25], [42.18, 1.18], [42.25, 1.15], [42.5, 1.25], [43.03, 1.03], [43.25, 0.5], [43.15, 0.25], [43.25, 0.0], [43.03, -0.53], [42.68, -0.68], [42.53, -1.03], [42.18, -1.18], [42.15, -1.25], [42.25, -1.5], [42.03, -2.03], [41.5, -2.25], [41.25, -2.15], [41.0, -2.25], [40.47, -2.03], [40.25, -1.5], [40.35, -1.25], [40.32, -1.18], [39.97, -1.03], [39.75, -0.5], [39.85, -0.25], [39.75, 0.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.3717769609153265}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7639755669446018}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.285540517171228, 26.75216656007632, 26.67516214121946, 26.44237610347693]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.008074696858728, 25.530904388427757, 25.532729085286462, 25.13536732991537]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7571044592530711, -1.6540272418036095, -1.7096530224085906, -1.9445456725614652]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8298162128099307, -2.3717769609153265, -2.037353096167351, -2.271242091648844]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6392193603234286, -1.590059814939343, -1.6750376296636174, -1.8802558368052422]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.726240600891709, -2.1201221388988887, -2.121389084800264, -2.236076701983697]}}