{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:13.728887", "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-Dec-09_to_2025-Dec-14_41.0_15.5"}, "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": 2025120000376}, "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": "December 09 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 14 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 62473.35853793797}, "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"]}, "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": ["Red Sea"]}, "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": 15.5}, "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": 41.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "41.0\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": 14.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[42.53, 16.53], [42.75, 16.0], [42.65, 15.75], [42.75, 15.5], [42.65, 15.25], [42.75, 15.0], [42.54, 14.5], [42.75, 14.0], [42.53, 13.47], [42.0, 13.25], [41.47, 13.47], [41.32, 13.82], [40.97, 13.97], [40.82, 14.32], [40.75, 14.35], [40.5, 14.25], [39.97, 14.47], [39.75, 15.0], [39.85, 15.25], [39.82, 15.32], [39.47, 15.47], [39.25, 16.0], [39.35, 16.25], [39.25, 16.5], [39.35, 16.75], [39.25, 17.0], [39.47, 17.53], [40.0, 17.75], [40.25, 17.65], [40.5, 17.75], [41.03, 17.53], [41.18, 17.18], [41.25, 17.15], [41.5, 17.25], [42.03, 17.03], [42.18, 16.68], [42.53, 16.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "N.Eastern-Africa", "Arabian-Peninsula"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.47, 16.03], [41.0, 16.25], [41.53, 16.03], [41.75, 15.5], [41.53, 14.97], [41.0, 14.75], [40.47, 14.97], [40.25, 15.5], [40.47, 16.03]]]]}, 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15.5], [39.85, 15.75], [39.75, 16.0], [39.97, 16.53], [40.5, 16.75], [40.75, 16.65], [41.0, 16.75], [41.25, 16.65], [41.5, 16.75], [41.75, 16.65], [42.0, 16.75], [42.53, 16.53], [42.75, 16.0], [42.65, 15.75], [42.75, 15.5], [42.65, 15.25], [42.75, 15.0], [42.54, 14.5], [42.75, 14.0], [42.53, 13.47], [42.0, 13.25], [41.47, 13.47], [41.32, 13.82], [40.97, 13.97], [40.82, 14.32], [40.75, 14.35], [40.5, 14.25], [39.97, 14.47], [39.75, 15.0], [39.85, 15.25], [39.75, 15.5]]]]}, "2025-12-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.75, 15.5], [39.85, 15.75], [39.75, 16.0], [39.97, 16.53], [40.5, 16.75], [40.75, 16.65], [41.0, 16.75], [41.25, 16.65], [41.5, 16.75], [41.75, 16.65], [42.0, 16.75], [42.53, 16.53], [42.75, 16.0], [42.65, 15.75], [42.75, 15.5], [42.65, 15.25], [42.75, 15.0], [42.54, 14.5], [42.75, 14.0], [42.53, 13.47], [42.0, 13.25], [41.47, 13.47], [41.32, 13.82], [40.97, 13.97], [40.82, 14.32], [40.75, 14.35], [40.5, 14.25], [39.97, 14.47], [39.75, 15.0], [39.85, 15.25], [39.75, 15.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.528305076565232}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.0239178583866646}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.716575876871786, 25.77994308471682, 25.49861246744797, 25.44122055295918, 25.350010717482803, 25.349776022774847]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.716575876871786, 25.40176925659182, 25.095808919270837, 24.785559590657556, 24.929769134521507, 25.054987843831384]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.7418646931093349, -0.8832068887010147, -1.1078926254604824, -1.1045182327611114, -1.0313405854475661, -0.9465390246987876]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.7418646931093349, -1.1171824975901927, -1.4597011728640155, -1.528305076565232, -1.3978079271866477, -1.4145830242969168]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3187513667744952, -1.5430686518994503, -1.9056693768430173, -1.9114744161099964, -1.7245639228877618, -1.5553210921247966]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3187513667744952, -1.8915005508686151, -2.447374203731629, -2.3686044471262973, -2.093498379534473, -1.7783577239868664]}}